TPI MEGA TEST-WHAT WORKS BEST?

FULL RESULTS. STEALTH vs MINI vs SUPER RAM, 10 TPI INTAKES TESTED,
383 STROKER, What is the best TPI system for your small block Chevy? How much power does the stock L98 system make? How do carburetors compare to TPI? Does runner length matter? Stealth Ram, Mini Ram & Super Ram-I tested them all! SLP, ASM, & TPIS-the L98 TPI boys are back in town!

[@1970chevelle71]

This is a very good illustration of tuning with the intake manifold runner length, a 500 foot pound / 500 HP small block makes for a very enjoyable street engine.

[@jimdouglasgregory]

I will take the 530 ft lbs of the the tpis long runner. WOW

[@marcbrazzers]

I put as&m, ported stock plenum, accel/lingenfelter manifold, stock TB with airfoil, and make 271hp and 354 tq with a 305 (P&P heads, bigger cam, forged internals, bored over 0.030 which I guess makes it a 310ci). Going to keep entire top end (except will upgrade to 24lbs injectors) and replace block & heads with a 383 and AFR 195 heads which should yield similar numbers to this I think (500+ tq range and 400+ HP range)

[@cmcbunch]

Now imagine if you put a turbo on it with a air to water intercooler to make up for the loss of high rpm flow with boost. Best of both worlds. Sacrifice some top end HP for OUTSTANDING off idle response, drivability, and fuel economy when cruising but you got the hong kong hurricane for passing all these 20yr olds with 5.0L mouse stangs.

[@jeremypike9153]

That extrude honed stock intake surprised me the most. Definitely not the 500 hp mark but torque was as good as the TPIS whole package.

[@cmcbunch]

@@BuzzLOLOL yup. They are the best forced induction type for street driving. Turbo is best for peak output, centrifugal is best for ease of tuning, roots is best for price/perf in towing/mid rpm power. Each one has an application. Putting a twin screw on a TPI setup though would be interesting project due to mounting/hood clearance.

[@cmcbunch]

@@BuzzLOLOL you do if you want to maintain high torque production in that rpm band. boost just uplifts the torque curve that already exists. TPI is great for tq.

[@FBobby]

This is Fantastic! More GOOD SOLID PROVABLE TPI info is what we need.

[@ilovethephilippines8991]

Absabloodylutely...

[@fernandopina4161]

Was hoping to see the newer FIRST tpi and FiTech ultra ram....

[@camaromustangmods3327]

Richard Holdner" So what did you guys think about the big intake shootout" I think it's the best video to date hands down. You keep raising the bar.

[@richardholdener1727]

thnx

[@xmo552]

@@richardholdener1727 What's the ECM?

[@AP-vv1yu]

This guy always hits it out of the park with info/data! Keep it rolling man! 🔥🔥🔥🔥🔥

[@paulverisor]

I performed a couple of these tests personally in a car on a 350. I had a stock tuned port and both TPIS set ups. The TPIS stuff is amazing on both long and short runner combos. It literally is just a trade as he says. In the car at the track both ran better than the stock but both ran exactly the same ET and MPH. The difference was how the car felt on the street. With the short runners, the car felt less snappy and soft to drive.

[@zackchigo]

Love this. Built this engine with my Dad a few years back in our C4 based off the magazine print. 3k stall and 500ftlbs hits hard on the street in a 3,100lb vette.

[@cimism610]

Link to the article.

[@xmo552]

@@cimism610 10 times the torque The ultimate tpi shootout Google it. You can download the pdf

[@xmo552]

@@cimism610 It's called "ten times the boost"

[@xmo552]

Zach How did you tune it?

[@GIGABACHI]

GM TPI intake: Best n/a truck manifold . . . E V E R. 👌🏻😎👍🏻 I liked better the XTRUDE HONED combo. 😊👍🏻 Gains everywhere. 👌🏻

[@DrewLSsix]

Remember a guy with a worked over 305TPI in his chevy conversion van, thing apparently moved out well and returned north of 30mpg when cruising on the interstate.

[@shadowopsairman1583]

Erm the LM7 and LR4 and TBSS intakes are rockin.

[@xmo552]

My 85 GMC tow truck is getting a 400 TPI when the 350 needs a rebuild. Dad wants to fix up his old 88 caprice wagon and drive it to the grand canyon from SF Bay while maybe pulling a small trailer. It's a 305 TBI. It needs a new engine, been dead for years..... I think a 305 TPI might be the best for mpg AND torque.

[@RSChris666]

Would like to have seen a FIRST TPI intake thrown in as well.

[@johnclary729]

Looking at FIRST TPI it looks like the power would be much like the extrude hone or TPIS because it was just a big runner TPI. I saw a video of a 383 running the FIRST kzbin.info/www/bejne/ppfSkHeebLuVd9U and it's a little better than the factory TPI but without knowing the cam on the FIRST setup I couldn't say how much of an improvement over factory it was any.

[@bluecollarhotrods9781]

Just looked - they still produce/sell them. I am surprised, all the other intakes/runners in this test are hen's teeth nowdays.

[@DrewLSsix]

I know its more of a hack job but a converted LT1 manifold would have been cool, I doubt they were doing this back when the original tests were run but a decade ago they were the poor man's mini ram.

[@of_lion22]

@@DrewLSsix I don't see why using a converted LT1 intake would have significantly different results than the MiniRam used in the video.

[@adamarndt7617]

John Clary Those guys didn’t build a great crate with the FIRST. These guys at RCS sell a crate motor with 460 hp and 520 ft lbs. It’s so far beyond a factory TPI intake: rcsracingengines.com/Perf%20Crate%20Engines/Crate%20383%20HP460.T520%20SB%20Chevy%20EFI.html

[@corypierce202]

So cool to see all the old aftermarket TPI setups after all these years. I forgot about many of them

[@samholcombe3129]

I never get tired of your videos, nobody else is doing so much research on L98 stuff as you, LS stuff too, much less sharing it. I’ve had several 3rd Gen L98 cars and have been wanting to LS swap one for a while, watching this has me thinking just build and stroke the L98 again, I never did more than bolt ons, cam and SLP shorter runners and throttle body. It would be nice to see all these setups at the drag strip to see which is faster in 1/8 and what’s faster 1/4 mile. That is a lot of work. Maybe I can just google them for 12 hours lol. Seriously thanks for making these videos Richard, I love them all.

[@Redmist370Z]

I was thinking that you completely ripped this article off from...YOURSELF! Glad your still out there doing the lords work!

[@richardholdener1727]

I did! I do it all the time!

[@frankmarson2425]

Thank you for your TPI videos they have helped me confirm that the my gut instinct when we finish the mustang the C4 will get a long tube intake and centrifugal supercharger. Hopefully it will give her plenty of torque low down and the rising boost curve will stretch the top end out a little

[@guyconnell2250]

That long runner extrude hone deal would be the one I'd choose for street.

[@nowayjose596]

One thing you had to take into consideration was the huge drop between 1st and 2nd gear in the 700R4 - that's when the benefits of the extra torque of something like the SuperRam really shined in comparison to the Miniram. Now if you were running a T56 swap with steeper gears in the rear, sure, Miniram or Stealth Ram all day with a cam this size. But with a smaller cam better suited to it, 2800-3200 stall converter, and 3.27 stock rear end, I think the SuperRam would perform best overall.

[@JNAMOTORSPORTS]

You never heard of changing gears?

[@nowayjose596]

@@JNAMOTORSPORTS You mean that thing that's specifically mentioned in the original comment? 🤦‍♂️😂

[@xxxxxxxxxx6903]

The LPE SuperRam was designed to be smog compliant. The MiniRam, not so much. Depending where you live, that can be a major factor!

[@erenzoscroggins8056]

Bro this is crazy!!! That's more power then a lot of LS combo's especially the torque WOW.. thanks Richard this made me rethink the set up for my 1977 Suburban,,, the ported stock intake didn't do so bad either💪🏾💪🏾💪🏾

[@xmo552]

My 85 GMC tow truck is getting a 400 TPI when the 350 needs a rebuild.

[@renwickconolly2839]

Richard's page is amongst the BEST on You Tube.. SUPER CONTENT that is well presented.. Wishing you much success!

[@richardholdener1727]

thnx for the support

[@icsamerica]

Thanks Richard... I think the origional test was called 10 times the Torque and it's how I arrived at my present setup. I've referred to it a lot over the years. I've got a mild cam (smooth idle) 406 with a Super Ram and a T56. Started with TPI, Tried bigger cams, and the Stealth RAM but went back to Superram with a mild 210/218 roller cam crutched with 1.7 roller rockers for a dead smooth idle good street manners. Makes all the power from 3500 to 5500 where I like it for my skill level on a road course. I recently got my first 6.0 LS2 and was surprised how much better the SBC was everywhere below 5500. The LS is getting twin turbos and mild cam soon but I still enjoy the SBC.

[@bartpang]

Cubic inches will do that.

[@TK-eg7eg]

I’ve had a mini ram since 1996. Been wanting to see all the intakes tested together. Thanks!!

[@finnroen2334]

534 lb/ft from 383 CID is 1.39 lb/ft/CID = Excellent and very rare for any engine.

[@batasspp]

This test was done like 20 years ago. Carcraft maybe? Same engine, same heads, same intakes, same pictures, same test. I'd love to see an LS make that much low and mid range torque. Thanks for bringing it back. 35 year old technology still more tq than the L8T!

[@batasspp]

@@BuzzLOLOL I agree, but they don't make the same torque under 4k that tpi does on a 383 with good heads, even a 6.0. But the overall torque curve is a little better.

[@Vekurus]

The Accel box is what I remember back in the good ol mid 90's. Father had an old Carroll Supercharging Paxton hooked up to a Lingenfelter built 420 with that intake on it and a 100cfm throttle body, Brodix heads. was a solid 11 second 85 C4.

[@Knightmare-gz9ls]

Love the old school look of the traditional style tpi. Would be a hell of a good time in a iroc or gta

[@75zl1]

I wish this was here when I had my corvette LOL that is awesome, I even had a 383 in it! Thing was a MONSTER down low

[@b.c4066]

Stealth ram, or performer rpm with a holley 4bbl efi. Both made the broadest power and really close to the short runners max hp, as well as matched the stock ported tpi tq curve. Interesting stuff.

[@wheelstandr]

I was shocked at the power of the extrude honed with Tpis runners. A lot of guys are going to be disappointed with they’re edelbrock set ups. I have the TPIS mini ram on a 350 and really like the high rpm power for racing. With the ram air setup I get every penny of power. Fun video for those of us gen x’ers!

[@jarvislarson6864]

00⁰0⁰00

[@gordocarbo]

The edelbrock bases are fine and real good after porting Runners...Id use asm if you can find them.

[@markbuskens6070]

This is probably my favorite small-block Chevy test that you’ve done!!!I agree the cam hurt the lower torque numbers but it was a great intake test👍Some of those intakes were designed for use in a boat so low end is less important,I’m very glad you did the single plane and the RPM for the do all end all results!🤓This is one of the best if not the best intake test I’ve ever seen by far!I had a 408 with next smallerComp cam with the Rpm and the mighty Demon 750 and it was a very good street combination. Brutal low end and would pull hard to 7000 in a 4 speed.Thanks for all your great content and testing 🙏🙏🙏

[@rattdog777]

I love the SBC tests !! Thanks for not forgetting about us non LS peeps !!

[@beardedreviews]

Immediate thumbs up for clipping the lav mic to your shoulder :) This guy is a trooper

[@redtesta]

Great comparison. So many of those TPI's i remember from the past. Great video

[@mickeycruz912]

Thank you Richard... I would have liked to see the F.I.R.S.T TPI in there too

[@firstperformancecenter]

Would have been great!

[@kennybiggs3944]

Thanks for the good information appreciate your channel it is the best information a guy could get 👍👍👍👍👍👍

[@jtthill5475]

Great series Richard. I wonder if you ever did any cross ram tests. Several years ago Nelson Racing built a X-Ram intercooled dual intake for twin turbo applications. I have always been fascinated by long tube cross rams since the 413 had it in the 60's. Torque is what moves the vehicle and horsepower is what accelerates a vehicle. Old school thinking. Would love to see something on old and new cross ram technologies. Thanks for sharing your knowledge.

[@richardholdener1727]

I have run X rams on lots of motors

[@johnclifford1911]

This is a really well-done video/test... the best one I've seen on L98 engines. I have a '91 C4 L98 and now I know what I want to do with it (stroke it, get AFR heads, get the stock TPI manifold and runners Extrude-Honed, with a larger TB, so it looks stock but really performs). The intent is to build a sleeper street car that looks stock but surprises most people. Hard to use more than 450 HP on the street without traction control.

[@TheJMan1K]

What rear end do you plan on running if you haven’t built it yet? I’d say just reinforce the stock rear if it’s purely a street only car.

[@arandumassol1144]

Funny I mirrored this test back in about 2000 when I bought my 89 Firebird with a 350 that had a converted LT1 intake but the guy who did the conversion did not get the distributer hole angled right and it chewed threw dist gears. I first bought a TPI intake to replace the LT1 and it made huge torq down low with a GM Hot Cam, 700r4 and 3.73 gear but ran out of breath at 5000 to 5500 rpm range. I then bought a Holley Stealth Ram and it was the better all around performer for my combo, better torq down low than the LT1 and better up top than the TPI. I just pulled engine in 2020 and the dist gear as well as the cam gear are both chewed, prob why my timing has always a bit erratic after the intake swaps. For a street/strip car I would recommend the HSR but as always it depends on your combo and where you want your power. Keep up the good work Richard!

[@michaelangelo8001]

Thanks. Turned out about like I expected, but it's great to see hard data. No more need to speculate.

[@mr67maro]

Glad to see my Performer RPM do so good,what a great manifold. Thanks for the video!

[@tracymarlar934]

Thanks I've been thinking about putting the factory setup on my pickup and you just confirmed it!

[@markbuskens6070]

Oh and I almost bought the Holley Ram fuel injection for that same motor and was happy to see it was very similar to the Edelbrock RPM in torque and hp too!!

[@carsandcorvettes]

Gotta do a video for “The other guys” with the crossfire 305s and 350s used on the Camaros, firebirds and corvettes

[@utahcountypicazospage5412]

Cross fire didn’t work well even in stock form that’s why tune port was proven better but still lacked power

[@geoffmooregm]

It would be cool to see a well tuned crossfire in action. The induction was so neat. The fact that it was a dog on power was mostly due to the ultra low compression, shitty heads and baby camshaft. I am sure with modern parts and a port job on the intake the power would be great.

[@safetyfirstintexas]

Or even the 96 to 99 vortec base which is essentially crossfire base with a spider injector contained inside a plastic housing.

[@VeTTeMaNC486]

The crossfire was a dog mainly because the runners were 2/3 the size (cross sectional area) of the head. Tinyyyy ports. The make really good gains opening them up. They are one of those situations that the larger you can make them the better.. some people even weld near the ports to get more meat. A well ported crossfire would perform better in the upper RPMs than the stock tpi, simply because it has shorter runners. I would love to see a crossfire test, stock manifold, then good heads and cam, then add a Renegade intake!

[@ronb113]

Pontiac turbo 301 lol

[@sseibonnevilleman]

I ran a stealth ram on the Firebird back around 04-05. I also did a cam swap. It made a huge difference.

[@coreytheisen6948]

Was it 305 or 350

[@sseibonnevilleman]

@@coreytheisen6948 350, biggest difference is it made power past 4K RPMs.

[@roostercogburn2600]

Gotta love the eldelbrock rpm. Crazy good value and great performance. It's easy to see why they talk it up on engine masters

[@richardholdener1727]

it is always a solid performer

[@jasonhudek3470]

Fantastic comparison! Back in the day, I always wondered how these intakes compared on the same motor, questions answered! Definitely a lot of mystique (and a few expletives) with the Superram, great to see it in here as well!

[@chupacabra5205]

I remember reading in the 1990s car magazines how the Accel Super Ram was kinda unbeatable. The price was steep but kinda cool looking.

[@corvettefever360]

I had it, & always had the best results with the Accel Super Ram. Ironically I recently just sold it, & it was just the plenum/manifold & not the complete DEI system, regardless I got over $2k for it. Guys were jumping on it as the bids kept increasing. They are very hard to find, & quite sort after.

[@carlos64030]

Great video and this will help me a lot! I have a 1991 Trans Am GTA and I've been trying to decide which route I'm going to go with my motor build since I've completely ruled out doing the very popular LS swap. My goal is pretty low by looking to make only 400 - 450 horsepower at the crank, which I feel can be easily done without having to switch to a different engine platform.

[@BlackRam17]

What did you end up doing?

[@carlos64030]

@@BlackRam17, last week I purchased a 383 c.i. crate motor - 435 hp / 450 tq FIRST Performance TPI style intake Holley HP EFI ECU & Harness Kit Holley 30 PPH injectors Individual coil on plug setup

[@LD9user]

This is almost EXACTLY what I built for my '89 IROC. The only difference was my milder Comp camshaft. The torque was extraordinary. ;)

[@bluecollarhotrods9781]

I had a set of Accel Runners with hand ported factory lower and plenum on my IROC 5.7L years ago, it worked well. Then had an AFR headed 383 with a TPiS Mini Ram... two entirely different animals. Wish Holley had the TermX back in the mid 90s - "chip burning" had a STEEP learning curve.

[@ilovethephilippines8991]

Mate, you would have to be one of, if not the best, most informative, most bloody useful site on the planet, not just utube, thank you ever so much AGAIN... Eddie. Australia 89 C4.

[@richardholdener1727]

Glad to help

[@yng4evr68]

That may be the wrong cam but boy is that horsepower line flat out to beyond 6k with the stock induction on it. Something like this looks like the best of both worlds. Even my little 305 would fall on it's face at the track after 5200. I would try to shift at 5500 and it would run 2 tenths slower every time. But 300 lb/ft at the wheels sure was fun in a 2700 lb Datsun Z. Low 8s/high 12s all day and 24mpg. Loved that 240Z.

[@waynesmith896]

Loved this test but was hoping to see the First TPI set up as well!!

[@firstperformancecenter]

Wish we were invited as well!

[@echadmiyodea]

me too

[@HioSSilver1999]

Tpi set up would look so sexy stuffed in a k5.

[@chrisyeahbuuwassrileegowyn9279]

Very cool to see these comparisons, I built a similar 383 for my 89 formula 350. TPIS base /runner and cam .523/.528 with 1,6 rockers, cant remember the duration/ LSA It was pretty hard to ever be caught in the wrong gear, or at the wrong rpm. Pulled like a bear from just off idle, then it was shift soon, or sooner.

[@cmcbunch]

I had a 383 with dart iron eagle 215s, 10:1CR, stock TPI base/runners/plenum, dual 58mm throttle body, B&M full manual 4l60, and 2.73 gears in a 92 camaro. The torque was outstanding. She'd top out at 4750 RPM in 4th with the torque converter locked doing about 189mph. I wish i had a locking axle back then. You had to be real careful because it would blow the tires off right off idle, and the engine rev'd so fast that it would shift up before you could get out of it (hence the full manual valve body later). Car had so much front end lift at 190 that the front suspension was full droop and steering would get scary. I did a road trip and set the cruise at 135 once and got about 33mpg at that speed. I was sure I did the math wrong so I ran another tank out of it with the same results. TPI is great with the right application. High RPM just isnt that application.

[@xmo552]

How did you tune it?

[@cmcbunch]

@@xmo552 i went through about 7 chips back and forth through mail. If I had it to do over again I would have bought a standalone, but at the time I couldn't afford it. I later ran a different engine with accel dfi, and a dual sync distributor for sequential injection. It worked WAY better as it had wideband o2. In a 77 caprice with the original th350 3.08 gears (non lockup) i was able to get 22 mpg at 55 mph towing about 7000 lbs.

[@Misterfairweather]

This was really awesome, especially seeing the superram and slp cross ram pieces both of which can be a bit tough to get a hold of these days.

[@finnroen2334]

Hell yeah Mr. Holdener. Hell yeah! Excellent!

[@arturos.3973]

Today was a good day indeed!!

[@rdub79lx]

Had a Miniram back in '98 on a 11:1 355, TPIS ZZ9 cam, TPIS PROM chip and Performer RPM heads. Full interior and AC, '87 IROC was a solid 10 sec daily driver on a 125 shot NOS plate kit.

[@richardholdener1727]

they definitely work

[@johnclary729]

Looks like the TPI works well with a big cam to extend the power curve higher and the long runners keep the low RPM torque stupid high so you get that good dig out of the corner and then the big cam keeps the engine from falling on its face as the engine revs out at the end of the straight.

[@robertb3409]

I'm amazed how flat the hp curve is the stock and tpis intakes. I do like the 500ft lbs of torque

[@stefanmilazzo3093]

Hey Richard, awesome comparison of all the different TPI systems and manifolds. I love your video of you putting one under boost too. Have you considered testing the FITech Ultra Ram system? I’d love to see what curve it puts out and how it compares to these

[@party_on_dudes]

I agree with some of the comments that a video on a stock L98 and how to improve performance would be nice. I looked up these intakes and no one makes them anymore.

[@cheviacGuy89]

Yes they do. The holley and tpis is still made and the fast tpi which wasnt mention is still made as well.

[@indyrock8148]

Interesting to see HSR and Dual Plane results so similar

[@firstperformancecenter]

Very good information! Who did the actual dyno tests and what electronics were used? I may have missed that information in the video? Very curious that we were not invited to the party? Would have been fun! 😁 I guess it is a good thing we will be doing some comparison dyno work on our KZbin channel in the future as well! Thank you for the support you give to the tpi crowd! I am glad to see others are out there, keep up the good work! 👍

[@richardholdener1727]

I used a fast ecu-this was done many years ago-maybe before you were even in business-I would be happy to test a system and return it

[@firstperformancecenter]

@@richardholdener1727 Hi Richard, when did you do this test? The FIRST has been out for almost 35 years. It is good information for guys to understand the difference between the types of intakes for sure. We have been making the FIRST tpi since 2000 and air sensors which originally designed it, did so in 1987 or so until the early to mid 90's. It was shelved as air sensors moved to the propane side of things, until I purchased the tooling to bring it back. The FIRST tpi has been out quite sometime actually. The vector W8 used it as well. We have many magazine tests that we can pull from the archives and post dyno testing against all the competitive companies of the time period. I would be interested in who did the dyno work on your tests? Can you tell me who it was that did this testing for this video? I would love to bring out a FIRST tpi and be there when you did the dyno test for sure. Have you ever had a FIRST tpi in your hands? Just curious, as it is much different than the tpis that you compare it to. It also has a lot more potential as the base is cast at 1.875" ID and the runners at 1.75" ID which is larger than any other system out there. It also can be opened up to 1.9" ID all the way through. Then add the siamese work, to theoretically shorten the runner length and I think it may open even more eyes? Keep up the good work and maybe we will talk soon! 👍

[@Madmax.3]

@@firstperformancecenter the test was done in 2004 yes first used to be called air sensors richard was there for these test but didnt do the tuning this is all form the acticle called ten times the torque. as you know the correct tune for a efi has alot to do with how much power can be made, i own your first intake along with all the other tpi intakes used in here aswell as both design SLP runners the first unit is a tpis on steroids

[@leewilliams8836]

Thanks for always sharing the great knowledge Rich.

[@devianb]

I would have been curious about the "FIRST" intake. Looked exactly like the stock TPI, but much larger intake runners on the inside. My vote is for the Holley Stealth ram for street/strip, but the problem is that its too tall to fit under the stock hood of corvettes and Firebirds. Camaros could get away with it with a little trimming of the hood brace.

[@firstperformancecenter]

Yes it would have been great to see the difference between the Holley stealth ram!

[@jamesbowman7963]

Ran Formula 350 Firebird with TPIS lower and 52mm throttle body with AS&M runners and ported plenum with Brodix 180cc heads. Had a TPIS cam I think around 226 duration. Comp cams roller rockers with a T-56 behind it. Lingenfelter headers Tri-Y through twin big cats and a 3.5" single exhaust without mufflers. Car would almost jerk the fronts off the ground and got 26MPG at 75mph because of the T56... Embarrassed more than few mustangs... Would have loved to see it with modern electronics burning chips like throwing lawn darts at it, also maybe a 383 with AFR heads. A TPI done right is an 11 second machine all day.

[@approachingtarget.4503]

In all the yrs of test after test. This large plenum and tpi system with a centrific blower has produced the best power and fuel economy ive ever seen. I believe it was in a article from the early 90's that used the eccell. Set up. I believe the title was 500hp and 25 miles to the gallon. Nothing gas has macthed that performance yet.

[@str8edge_lifer83]

I believe that was in gm high tech magazine

[@StickShiftSamK24]

Thanks for creating content buddy.

[@richardholdener1727]

thnx for watching

[@brucechamberlain9890]

Richard Holdener it brings back a lot of memories of things that the younger Ls crowd knows nothing about.

[@xmo552]

The graphs are worth so much!!

[@richardendress4494]

Great presentation of solid data. Thanks.

[@joelvallejo7451]

Can you do a video on the TPI first intake. That would be awesome thank you

[@monkey32z]

Be nice to see a comparison with this combo between the 305 and 350 as the GM TPI was intended for the 305. GM was gonna kill the 350 and the TPI intake was only designed for the 305. Consumers and corporate kept the 350 and they just slapped the 305 designed TPI onto the the 350, significantly killing air flow...

[@gordocarbo]

tq curves would probably look the same just more of it with the 350 GM already had the LT1 down pat yrs before it came out so they didnt wanna waste money on a larger TPI system Never liked the short runners on the LT1 or its lousy plenum area

[@geoffmooregm]

Great info, really shows that runners matter. I have a measly 3.1L TBI V6. It came stock in Isuzu Rodeo's but I have swapped it into my Trooper which had the slightly smaller 2.8L. If any of you have seen any of the stock TBI manifolds you will know how sad the runner situation is in there. I am going to fabricate a new intake by taking the lower section of a MPFI manifold that was on the F-Body V6 and graft a plenum and mount the TBI on top. The engine performs well but I know there is more I can do. It won't cost me much so it's worth a shot since there are no aftermarket options.

[@richardholdener1727]

add boost

[@geoffmooregm]

@@richardholdener1727 I would but sadly there is no easy way to do it without a whole lot of custom work and electronics. Plus I use it off road so I want to keep it dead simple.

[@ninjahawg94]

I'd like to see data with "the other guys" ITB's Weber style manifolds.

[@tomorr152]

Richard, I was just looking over the "Ten Times the Torque" article today, I've got it in my computer. I've got the SuperRam and MiniRam intakes that I've used on my 383. Like them both, just like you prove on your show runner length determines power curve. I've ported my SuperRam, base and runners also siamesed them about 2" to try and get the best of both mid and upper rpm power. It has improved it a bit, but the MiniRam definitely pulls harder on the top end. I've raced both intakes and with the 700r4 trans the SuperRam edged out the win by about .5 sec. I think the MiniRam is faster with the 6 spd. Haven't raced it with the 6 spd yet. I have to say I like the feel of the SuperRam for regular driving. You do a GREAT show love watching, keep up the great work and videos!!

[@richardholdener1727]

THNX-SOUNDS LIKE YOU DID SOME COOL TESTING

[@tomorr152]

@@richardholdener1727 after watching you put the Torque Storm supercharger on that 305 TPI I want one for my 383. Question is my compression is around 10-10.5. Is that to high to run the TS? I've got SRP forged pistons, ring gap set .019-.022, H-beam rods, Howard's cams 4 bolt main caps, scat cast shaft 9000 pro comp. I'd like to run around 10 psi boost get me up to 600-700 HP. Do you thinks that's possible with street 93 octane fuel? Thanks!

[@Shane-Singleton]

I have always loved the L98 injection setup. Probably because I was a teen in the 90's and they were everywhere before the LT1's were really common. I wonder how much that extrude honing costs. I've got a few projects i've been wanting to convert to fuel injection and have been going back and fourth on the idea of L98 style vs one of the new bolt on throttle body injection packages from either Holley or Fi-Tech. While the throttle body "carbs" have the benefit of not having to yank the intake off they also don't increase flow over the stock cast iron intake or increase runner length, etc. I could also say screw it and drop a junkyard 5.3 LS in for the same price as that TBI setup, lol.

[@allanb3222]

I paid $500 to get my lower intake extrude,honed. That was with a v6 plenum.Not including shipping.

[@scottbrooklyn2995]

Another home run

[@downhillskier7]

First Fuel Injection intake would work better with 383 but was NOT included in the manifold test

[@travischristian7738]

Please test a FIRST tpi intake on this. I would assume it would perform similarly to the long runner TPIS setup, but I'd love to know for sure.

[@Madmax.3]

should do a bit more everywhere compared to tpis setup on this combo but on stock l98 i would run the tpis its also much lighter

[@firstperformancecenter]

Would love to be involved!

[@travischristian7738]

@@firstperformancecenter I'm glad you chimed in. Hopefully, we get to see another TPI intake test soon. In my opinion, your intake is the best TPI setup available. If someone is looking for a max effort, high rpm deal, it's best to abandon TPI style intakes altogether. For those, like myself, who want to retain the killer lowend of TPI and still pull strong at 6000rpm....FIRST is where it's at.

[@firstperformancecenter]

@@travischristian7738 👍

[@indk240]

Great video, love the old L98 mani. Would like to see a similar video on efi Ford 302 intake manifolds (gt40, explorer, tfs, edelbrock performer etc) especially if you have data on whether or not phenolic spacers do anything

[@richardholdener1727]

I tested all those intakes way back as well

[@HPDdisgraced]

Richard Thank You for all of your informative videos. They are all thorough and provide a wealth of information to all us gear heads. I am currently building a 383 and have both the Accel Super Ram and Holley Stealth Ram. I’m contemplating which intake to use. Is it possible to provide a comparison of those two synonyms curves to help make my decision. Thanks again and keep them coming.

[@rotorblade9508]

2:32 the shape of the tpi looks pretty nice, basically you have a 400hp motor and if you want to run fast you simply it from 4500 through 6000rpm and benefit from all the power it can make, 1500 rpm range is ideal. if for example you are in a competition where they accept a maximum of 400hp+-2.5% this setup would be perfect :). if you want the fastest intake from these 3 , sure this is not the fastest, although for take off it’s good.

[@jimbo9357]

Thanks for TPI vid. Got a 86 TPI TA WS6 resto.

[@bansheemopar]

You should have put the best long runner on the graph against the others. At That point this is a total no-brainer for me, for anything short of a pure race engine. The TPIS is way stronger up to about 5000 1/min, and when you shift at about 5200 1/min, you drop right into the meat of the torque curve.

[@james10739]

Like 60 HP gain with no real downsides that is crazy and Worth it most of the time I don't think intakes are but that much maybe it is

[@242bleek]

Everyone is so quick to jump on the LS bandwagon but no LS combo can provide anywhere near the useable torque of a TPI sbc. SBC's have always felt better on the street.

[@pioneershuffler]

I’m sayinnnn

[@rorydottin7143]

I would have liked you to test the 50mm itb system in comparison to the aforementioned manifold/manifolds test.

[@Reffuhnayr]

I wish you could still buy all of these intakes 😢

[@DSRE535]

It's funny how to this day its really tough to beat an rpm air gap with a 750 for street/strip duty for a sbc, personally I love the tpi stuff, I think I might add a tpi system to my K5 blazer, still doesn't make sense that gm didn't use tpi on the trucks

[@DSRE535]

@ron Kay yep, im sure it was an exclusive deal meant for the F-body and Corvette but still if you have a small block in a heavy truck its probably the best induction system you can use for idle to 4500rpm

[@derekscarrsr2688]

This is a very informative test.👍😎💖🔥💯

[@andyharman3022]

I have had a Superram on my Corvette since 1993. I got one from the first batch that Accel made from the Lingenfelter design. I can attest to Richard's complaint that it is difficult to assemble. I have made a few modifications to mine to improve assembly. Mine is on a 355 with AFR 190 heads, 10.7 compression, and a 224 effective duration Comp Cam. I have done road course track days with this setup for many years. It's good up to 5600 rpm, but it really lays down after that. Maybe it needs a little more cam, but I can see how a centrifugal supercharger would extend the rev range.

[@IacobucciB]

This definitely cemented my decision on running the 1205 Miniram on my SBE L98. Really lets the engine breathe and make power where GM’s halo sports car of the 80s should have all along. Running a slightly larger cam with more duration with the same heads and thinner MLS gasket I’m hoping for 400-450 wheel. Would’ve been really cool to see a First Performance TPI setup tested as well, although I understand most of this dyno work was probably done long before it was around.

[@thehappytexan]

Awesome test! Most of these would be good marine engines. Like a single engine, 21-23 ft bow rider or speed boat. Lots of torque and enough hp to run 50+ mph if propped correctly.

[@PetesGarageandperformance]

With that torque curve and max rpm of about 5000 these would be great engines. I have a 20’ bow rider that I put a stock vortec 350 (96-99 truck) in place of the locked up 305. I put the 305’s 2 barrel intake and carb on the 350 and I hit 50 mph with a 4 blade 22” aluminum prop. Could probably do better with a SS prop but 50 is kind of scary with my hull. I’m nowhere near the torque of this test motor. I have an alpha 1 and I’m not sure you can go much bigger than 22” prop. I bet you’d have to step up to a bravo to get the prop selection with this much torque.

[@HorsepowerTube]

I'd like to see what the Edelbrock proflo xt does. There have been many tests of these old manifolds. Never seen one on the proflo since it's newer

[@joegomez6929]

Love how the regular dual plane kind works best. Was wondering if y'all have ever tested LS coils to see if there is any gains with aftermarket?

[@richardholdener1727]

we don't see gains with coils unless there is a misfire

[@watajob]

Holy ancient history, Batman!

[@safetyfirstintexas]

2 piece manifold a la tpi base, dual Turbocharged extreme long runner intake. Turbo sized to spool quick down low. Just to see how much torque can be produced at lower granny driving ranges. Akin to the Chrysler dual sidel cross over intake of the late 50's early 60's You could actually use exhaust tubing for runners a 3" collector band clamps and 3/8 water jet cut flanges. Imho. A manifold everyone would want, not just go fast guys.

[@richardholdener1727]

check out the TPI l98 turbo video that is up

[@gordocarbo]

Richard you already know this and btdt but anyone who read (stilhave) Lingenfelters book on building Chevy power read about John 383 TPI 400 superram and even I think a 409sbc. Torque was real impressive. Know of anyone in Socal who can burn a chip for a 88-89 C4 TPI? Wanting to do a mild TPI 400 build to pass smog...Small Isky HR ported TPI afr 180 head etc. Basic cheap and reliable. (for once lol). WIll be my last build....simple retirement daily I can drive anywhere with AC

[@XxMusclecarsxX]

Torque is nice for a stock daily driver but on a hot street car you'd probably have a 3500 stall anyway amd something gear, I'd 100% go with more top end!

[@XxMusclecarsxX]

Carburetor setup ftw!! They never disapoint

[@jassoporherencia4523]

Great video!!👍🏼 answered many questions!

[@bennyfactr6122]

I ran a 11:1 385 dart ie200 headed sbc with tpi & lt4 hotcam for years. While the torque was fun, running out of steam at 5,000 became tiresome. Stuck a stealthram on it and never missed the low-end torque. Pulled hard through 6,400 with great street manners.