HOW CAN I MAKE MORE POWER FROM MY SBC 350? BOLT ONS VS BOOST-WHICH ONE MAKES MORE POWER? TRY BOTH!

[@mikef-gi2dg]

I have that exact 4 bolt gm crate engine. I added a Performer cam and intake and 600 holley. For a mild 350 it runs smooth as glass, I drive it to the track and foot brake it, and It runs the highway quite well. This video is my next step, some mild boost should do the trick. I say mild cause I want it to last for a while, and I like pump gas usage. I could push it to the max, but broke don't do me any good. LS is great stuff, but GEN1 forever! GREAT VIDEO.

[@glengabruch4664]

That motor with bolt ons and boost would be perfect in a '68 to '72 Nova. 👌

[@robertwest3093]

Just the supercharger made about the same hp as all the bolt ons, but 500 rpm earlier. If you're gonna do both then heck yeah that is obviously the ticket! I'd love to get back into this hobby but the price on everything is ridiculous these days.

[@danecooper1914]

I respect the old small block but this makes me appreciate the LS based stuff even more. That old small block is still something to be reckoned with when built a little.

[@KingJT80]

to me 800HP is 800 HP i agree the LS stuff is more advanced but give me a procharged 383 any day in a old school gen 1 with good breathing and ill take it every time over the LS if i want an LS ill buy an LS based car. C5s are fairly inexpensive....

[@rotaxtwin]

I was strangely relieved to see that the 190 horse small block managed 260 on the dyno.

[@evilinside5984]

Not with a stock type induction setup. This engine does about 210Hp @ 4,000 Rpm, with stock exhaust manifolds, full exhaust, and Tbi intake setup.

[@ShizawnSanders]

It would in fact do 190-200 on the chassis dyno.

[@manitobabois4593]

@@ShizawnSandersyea buts it’s rated 190 at the crank

[@ShizawnSanders]

@@manitobabois4593 i should have clarified. With a few bolt ons it would probably do 190-200.

[@drbendaroo9610]

406 SBC here. It's the squirrels!

[@JimBronson]

You can make a lot more power with a 406 than a 355, more than just the difference in CI would suggest. But the 400 blocks are getting more rare, they haven't been made since 1980.

[@edwardwood3622]

Great test again!! Would loved to have seen the stock engine get a 30/30 cam.

[@anthonyrowland9072]

@@BuzzLOLOL these need like an xtreme energy 250.

[@Wrenchen-with-Darren]

I still build and love the old SBC!!!

[@gordocarbo]

IMpressed at the torque and how low it came in boosted with the stock cam That will lay some rubber and idle in traffic with the ac on all day

[@charlieweaver6264]

Didn't know if you could explain how to control ignition timing under boost with an hei distributor. I know I could go buy an msd box but I really just want to use the stock hei distributor

[@richardholdener1727]

the only way would be to use an EFI and lock the HEI or use boost retard MSD or other if Carb

[@george1la]

Easy reliable power. I kept mine 9.5/1 and run regular gas. I do not race, just for fun. It is in a 1969 Chevy stretch van. It surprises people. Just a good motor combination carefully done. I also use 1.7/1 roller rockers. They work. I just went through a problem with the motor popping back. Finally, I took out the ohm meter and started checking plug wires. I found two bad ones. They were no more than a year old and 8.0 mm. Suddenly, with new wires it runs like a bat out of hell. Check your wires even if they are new, save yourself a lot of time. I have electronic ignition with one of those monster Accell yellow coils. It has a huge spark. I wonder if this caused the wires to fail. Does anyone know?

[@kennethsutton2490]

Great job, I have a 350 SBC setup very similar, except I have the 195 Trickflow head, and I was wondering what to expect with a supercharger. I like the numbers 612hp 558tq.

[@robertpursley4907]

What kind of number would one expect with a 400 sbc and the boosted only setup with a TPI?

[@xmo552]

😊

[@tenorhowlermonkey3454]

Impressive engine from start to finish

[@fiend_metal]

I love seeing this kindle of content. I am looking to add some more performance to the stock 178k 5.7 tbi, in my full size 93 blazer that I tow my racecar with. Already did a 4l80e conversion, the only gripe I have is low power and no AC yet...

[@ryansorkness7396]

So do i. Have 93 suburban. Replaced 350 with stroker 383 with vortec heads and biggest cam i could run with the factory computer. Wish i would have went witha blueprint engine, but only had so much money. My mid range picked up a decent amount, but still isn't a tire fryer

[@fiend_metal]

@ryansorkness7396 Yeah, I have thought about rebuilding it to a 383, or maybe swapping to a 454. But I really just want to build it with a roots style blower/supercharger and run it for a while. It's my current baby tow rig, but I am building it into one of my dream builds.

[@evilinside5984]

@ryansorkness7396. Just add a 3,500 stall speed, lockup Tq. converter, it will fry some tires then! Best of both worlds with a lockup Tq. converter, has the added launch Rpm to keep it in the powerband, then locks up the converter like stock while in Over Drive=Awesome!

[@aaronburt1103]

I'm surprised you had no detonation with that boost and static compression ratio with no intercooler. Personally I would buy the long block and supercharge it. That way if you blow it up you get another one and slap the supercharger on it and you're not out a nice set of heads and cam.

[@user-nd6og8si9p]

I would like to know what fuel octane was run in all the combinations myself. I'm assuming 93.

[@richardholdener1727]

cali only has 91-plus octane booster on the 600-hp combo

[@aaronburt1103]

@@richardholdener1727 that is impressive. Wish they would sell a 98 octane for us boosty boys that don't want ethanol.

[@KingJT80]

blow through carbs are a different animal than EFI. the carb actually cools the fuel under that pressure and when you have a vortech that box helps a lot CSU carb + a centifigal is a winner on the street saw a guy at the local car show pull up in a 79 malibu with a blow through procharger small block and a CSU carb

[@markwegner6100]

Only thing left is to stroke it!

[@dsm4959]

I’ve owned several LS and LT Engines over the years and my friends have a few now as well. I already have my Camshaft in my Boosted Engine, But from the posts online I know many would be interested in seeing a 6.4L Hemi Camshaft test between the Comp XFI 270 Cam vs Cammotion Titan 1 vs both the Comp HRT Stage 2 Camshafts. Both NA and Boosted. I know many would be interested in seeing this comparison. These Cams seem to be the most popular for the 6.4L Hemi Engine. Thanks Much

[@bjfrazier4895]

Will you donate him a 6.4 hemi? I would bet if you did, he would do all of those test, and then boost it! 😂

[@dsm4959]

I’m sure Richard has the Pull to get a 6.4L Hemi and all the additional upgraded parts for the engine. I would also like to see a comparison between an LS/LT 6.2L vs 6.4L Hemi. Most GM 6.2L respond much better to a Camshaft upgrade vs a 6.4 Hemi

[@russelljackson7034]

Right on

[@bradleymorris8875]

I think it needs a Big Shit plate system as an intercooler … with a mild 300 shot to get this project sorted out properly.

[@mikeeaton9822]

Best compression ratio for big boost, well at least old school.

[@graeme500]

Great video Richard. I always get something out of them!

[@FastFoxx82]

Awesome test, makes me think a totally stock 350 cam heads etc combined with a 1.6 intake rocker a decent forged piston and maybe 12-15 psi and an intercooler would have beem damn close to 500 hp

[@jasoncunningham7576]

Should have made 475 stock with cam and blower

[@ms.karihart2983]

Hello Just watched your video and amazed by the info you shared, I’m very impressed on the long block Chevy adventure with the stock 350 Chevy and the power , but my question is in a real world scenario . Could you daily drive such motor knowing its stock motor and with basic maintenance and a Pro- charger . Plus could you or would you give a list of parts Thank you again

[@richardholdener1727]

this was a vortech-I drve my Vortech Mustang for 85000 miles

[@gordocarbo]

of course youcan That boost wont hurt a thing, block has 4 bolt mains.

[@jasoncunningham7576]

I wish you would have added a cam to that stock motor so we could see the benefits of it because I think you could make a lot more power without an expensive set of cylinder heads so sometime try not to just take all the dinal information and conjure up a story actually do the Dino test so we can see the results I'm pretty sure the cylinder heads were unnecessarily with the right camshaft

[@richardholdener1727]

How else am I suppose to do a dyno results story if I don't use my dyno results?

[@stalegiverhaug2905]

Have you made a comparasion between Vortec heads reworked for higher lift and low cost aluminum heads? I would assume the low cost aluminum heads wil be a typical next step then?

[@richardholdener1727]

I HAVE NOT

[@ChillFactorProducts007]

Just happen to have a prochager sitting i need to bolt it on something

[@robertwest3093]

Why are they rated at 190? Is that with exhaust manifolds and a 2 barrel?

[@LucasMullins-j4y]

Probably like how OEM rates HP with all the drive accessories etc

[@evilinside5984]

Yes, the 190Hp rating is with the stock Tbi intake setup, stock exhaust manifolds, stock exhaust system, and full accessories driven.

[@robertwest3093]

@@BuzzLOLOL You mean L46 cam? I know it's hard to keep all of Chevrolet's specs from the '70s straight.

[@robertwest3093]

@@BuzzLOLOL I'm rather surprised that Chevrolet put that hot of a cam in a 350 during the terrible era of the smog years.

[@gordocarbo]

@@robertwest3093 THose cams havent been available from GM for many many yrs.

[@jasonbirch1182]

I would have loved to see the blower and a decent cam with the smogger heads. I have a 400 sbc rv reman with as big an erson cam(with the recommended springs)as would fit without cutting the guides. I want to say its like .486 or something, put it together years ago. I guess it will turn a mid-high 13( in an 85 Monte ss with GN 8.5 3.42) It runs with 4th gen camaros on the street. Ive thought about a turbo or an eaton m112 maybe. Just curious on what the heads are capable of with boost.

[@richardholdener1727]

less NA then less with boost than the good heads

[@jasonbirch1182]

@@richardholdener1727 yup. Just curious if it would cause any distress and what they are capable of.

[@billnu]

Why do I want a GM crate motor now? I love seeing how the different combos affect the output. Great stuff as usual Richard.

[@Oleblueburban]

Richard, I’d love your opinion on adding a torqstorm very mild boost 5-6psi to a blueprint vortec 350 engine? Engine specs BP3503CT1 (Mild Vortec Engine) Dyno: 405HP | 412TQ Cast steel crankshaft 3.480" Stroke OEM type 5.700" connecting rods Hypereutectic pistons Internal Front/ External Rear Vortec cast iron heads 64cc chamber Hardened retainers and springs 1.94 intake valves 1.50 exhaust valves Cam Type: Roller .495/.502 lift 221/226 duration @ .050, 110 degrees LSA 1.52 comp roller tip rockers

[@richardholdener1727]

works well

[@johnmillican3182]

Richard, what kind of fuel were you using on the final iteration? Race gas or e85? Thanks for the great video!

[@richardholdener1727]

PUMP 91 WITH OCTANE BOOSTER

[@Classickoolcars]

What’s one of those motors worth from the dealership??

[@natelorimer8567]

In figured the stock 350 was more decent with headers and intake over 195 hp. Not a rock star. But much better

[@mikef-gi2dg]

Add a 600 carb and intake and headers with decent exhaust, and it's 260 just like gm says. In a daily drives, it runs good street and highway, on 87. Basic fun.

[@gordocarbo]

Add an Isky 256 or 264 mega cam to your mods it would be plenty of fun sound good wiht great manners. Popular cheap combo in the day

[@mikeeiben3430]

Which would be more fuel efficient and effective in a towing application, boost or bolt ons?

[@JimBronson]

If it's an older truck, you'd gain efficiency and power moving to a set of heads with modern combustion chamber design.

[@bjfrazier4895]

Boost fixes everything______NX is icing on the cake though.

[@evilinside5984]

For towing, you want immediate, tip in throttle responce= Roots/twin screw, whipple super charger, just add ring gap, to account for boost, over about 8psi.

[@richardholdener1727]

that would be one big cam that takes power away at 4000 rpm compared to this stock cam

[@stevenminix]

Great video

[@RENEGADEX800]

Boost solves all the problems

[@Hothead_Lou]

Awesome test. Any valve control issues? What spring pressures? Very educational. Thanks Richard!

[@richardholdener1727]

WE CHANGED SPRINGS WITH THE CAM

[@daviddavids3468]

@@richardholdener1727 LOOKING AT POWER DROP OFF WITH RPM WAS THAT THE HEAVY HYDRAULIC ROLLER LIFTERS CAUSING VALVE FLOAT ? HORSEPOWER SEEMS DOWN ABOUT 40 HP

[@gordocarbo]

@@daviddavids3468 xe ramps causing float I bet. Not a fan of fast ramp stuff esp FT.

[@ericdebisz9458]

Those cast pistons were happy??

[@richardholdener1727]

yes at this low boost level

[@natelorimer8567]

@richardholdener1727 I been amazed at the abuse stock pistons can take. But of course I watched boost and timing . I have also painfully found limits.😂

[@mikef-gi2dg]

It's the same piston used on the 290 hp 330 hp ho engines. It's hyper piston.

[@utahcountypicazospage5412]

So the 190hp was probably wheel power stock.460hp wheel boost and head and cam not bad

[@evilinside5984]

No, this engine, with stock exhaust manifolds, stock exhaust, and the stock Tbi intake setup, does about 210Hp @ 4,000Rpm.

[@richardholdener1727]

the 190-hp rating was flywheel

[@gordocarbo]

190 was crank hp.

[@Apachefog]

That modified NA engine seems way low on power with those heads and cam. You never mentioned what the modded NA made and I was expecting you to compare the stock boosted engine to the molded NA.

[@richardholdener1727]

The modded NA numbers were given in the video

[@Apachefog]

@@richardholdener1727 I missed when you stated the numbers, my mistake. Still seems at least 50hp low.

[@evilinside5984]

@@Apachefog Its a mild cam, with a dual plane intake, not a race engine setup. Add a big solid roller cam, a super victor intake, a 2 inch super sucker carb spacer, Xp 1,000cfm carb., and 1-7/8" Long tube headers, and prob. make a 100+ more Hp!? But also would cost another almost 4k!

[@richardholdener1727]

it's not 50-hp low

[@gordocarbo]

@@Apachefog Low compression smallish cam combo. Too many dyno numbers online that are bogus. So when a real # is posted we see "whats wrong with it" a lot. Many 500hp numbers that are lucky to hit 400 plus

[@Ratridez]

Not seeing many 350 blocks up here in Alberta anymore , getting used up and many people are on the Ls bandwagon .

[@richardholdener1727]

cool

[@gordocarbo]

Ones I found around late 90s same thing. Bought a brand new GM 4 bolt block from paw for 500...I hear they re over 1000 now. Better get one before they discontinue them too. GM is stopping production on many gen 1 even early ls engines which sucks.

[@Ratridez]

@@gordocarbo Good small block are going up in price here to . Old school guys still looking for them .

[@NitroTheDingo]

Hey, I have an 350 L98 engine I want to add boost too. How much power can that engine reliably handle on a stock bottom end? I want to daily drive this thing.

[@richardholdener1727]

see the l98 turbo video

[@felonebike9859]

Ive now watched this like 10 times 😂

[@jayriskit8038]

What kind a power would a ls 383 with a ls 7 cam make?

[@richardholdener1727]

what heads and intake?

[@jayriskit8038]

A LSA intake with 823 heads. A ls 5.3 383

[@richardholdener1727]

how will you run 823 heads on the 3.900 bore?

[@jayriskit8038]

Use any good flooring head

[@kellyheath8547]

Cheap bolt ons first. Then boost if not class restricted. Add more things as power demands.

[@kellyheath8547]

@@BuzzLOLOL go ahead and look and see who was the writer of those articles.

[@marcustrue1213]

Would you ever help a guy with either their engine or figure out how to build a tow mule for under $2000?

[@marcustrue1213]

350 5.3 and 454 something in those displacements maybe 502?

[@richardholdener1727]

ASK AWAY-OR BETTER YET JOIN THE LIVE FEED FOR Q&A SESSION

[@SuperCookieGaming_]

does chevy still sell the 190hp 350?

[@richardholdener1727]

I have not seen it for a while

[@mikef-gi2dg]

@@richardholdener1727 It's been gone for about 3 years now. I bought mine at summit in 18 for $1650. I should have bought three. I am still kicking my self.

[@gordocarbo]

@@richardholdener1727 3 yrs ago tried buying a new GM crate 5.3 for my 02 Silverado I bought new and just finished frame off on. Discontinued months later and to make things worse Ca smog laws said only a stock tune passes. So much for my smooth idling pass smog 383 build. Stolen months after that. Best vehcile Ive ever owned hands down

[@daviddavids3468]

HOW DID YOU ONLY MAKE 413 HORSEPOWER, WITH A 10 TO 1 350, WITH AFR 195 HEADS AND A , 576 LIFT ROLLER CAM ? I'M GUESSING IF YOU WOULD HAVE HAD BETTER SPRINGS AND ACTUALLY REVVED IT TO 6500 RPM HORSEPOWER WOULD HAVE BEEN OVER 450

[@gordocarbo]

Honest dyno number sounds about right. That 230/236 cam isnt a good upstairs rpm cam. Midrange is its forte

[@anthonyrowland9072]

did GM discontinue these? the few i've seen were almost $4000?

[@gordocarbo]

Last time i checked the price doubled from 1200 to 2400 for these.

[@anthonyrowland9072]

@@gordocarbo Yeah, these were in the $1500 range for like 30 years...

[@pops3554]

S/c with 10 to 1 compression!!! How???

[@richardholdener1727]

easy-do it every day

[@pops3554]

@@richardholdener1727 😆 lol!!

[@rapidride2]

Thought this was the 260hp engine?

[@richardholdener1727]

this was the 190 hp version

[@ICONBADGTA]

That NA with those heads and cam seem low.. I mean a GM Fastburn head with LT4 Hotcam 218-228 split @.050 makes 430HP/430TQ... Something doesn't add up 'NA" with the best heads money can buy in those AFR Comp 195 heads and a cam with a (LOT) more duration and lift being down 20HP from a cam 12-13* less duration and .030-.040 less lift wise.!!.... That thing should have made 450HP/TQ all day long N/A with that XFI cam and AFR comp 195's, unless the compression was 8:1 which is a big issue on those factory engines... You sure the factory iron heads were 76cc? And not 65cc as most are? Cause it's just not adding up Richard.. Something was a "MISS" there.... NA wise.

[@gordocarbo]

Those smogger heads re 76. Compression really hurt that thing Torque wasnt bad but the hp was lacking as you said.

[@ICONBADGTA]

@@gordocarbo I am talking at the 8min mark, where he had the best heads money can buy and cam.. N/A with just that cam and heads, it should have been making 450HP/TQ+ as compared to a similar setup 350CI SBC with a set of GM Fastburns combined with a little 218/228 LT4 Hotcam makes 430hp/430tq with less compression infact at 9.6:1 vs his 10:1!! Maybe the intake was smothering it too much? I mean man that supercharger setup, 10lb of boost with a holley stealthram efi intake FI tunes, he could make 750HP+ all day long...

[@zigandarov]

Wow wow wow wow wow 👍👍👍 v8

[@pete1003]

I know how you feeling get more power out of your small block Chevy, build the Ford 351!

[@TT64NOVASS]

Lol . . . . . Why ? 😅

[@kalui96]

#motor

[@sebbonxxsebbon6824]

I rather add CUBES, build a 383!

[@baby-sharkgto4902]

Personally I blame John Woodworth

[@joe-hp4nk]

Duh, you're getting long in the tooth.

[@Kstang09]

Better than short teeth, amiright?!

[@studbolt5627]

👍👍

[@Harrybowles1969]

Man you do a video at just the perfect time, every time. Iv just been wondering just this for my 350. Thank you richard 🙏🤍

[@Harrybowles1969]

@@BuzzLOLOL I have the 9-1 compression 255hp 350 from 1969. It has edelbrock intake, 4 bbl, headers but I think cam and truck heads are holding me back. The thing doesn't rev past 5k!

[@Harrybowles1969]

@@BuzzLOLOL thanks I'm going to have a look now see what I can see. I'm in UK so sometimes I got to be patient with what's available. Thanks for your help I'm Gona need it 👍🍻

[@Harrybowles1969]

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