Testing LS Intakes! Which LS3 Intake Makes the Most Power? [Can Stock Keep Up?]

[@Funtimes670]

The LS3 factory intake is hard to beat dollar for dollar.

[@shadowopsairman1583]

TBSS

[@Funtimes670]

@@shadowopsairman1583 cathedral yes!

[@mikeverything4098]

Where can I find one for cheap

[@sebastiansidney1856]

Will it fit on lm7

[@Funtimes670]

@@sebastiansidney1856 you talking about the LS3? No it’s square port where the LM7 is cathedral port. The TBSS is the best for the cathedral port.

[@Onelowrado]

Id like to see the stock ls3 mani with 102 mm tb

[@FredRTP96]

It does no difference, gpi recently tested this and will be releasing results

[@billk9628]

Why you folks don't have the sponsors, I don't know! I just dumped on horse power TV for even attempting to run a carb on an LS engine, Why? I don't care how much Holley pays you, Why would you dump the factory PCM programming for a dam carburetor? You CAN tune that system and make all those numbers with stock parts! Do you really think GM's engineers are that dumb?

[@philllsxga.7737]

Exactly!!! You would one go backwards...

[@pawpatina]

Fast LSXR adds 11hp and 5tq BUT COSTS $1000+ AND NEEDS ANOTHER $500-1000 IN PARTS TO FIT IT????? You guys are drunk or something... putting $2000 worth of intake on a $500 motor to gain 10~hp wtf...

[@jessemurray1757]

on stock cubes and RPM under 7000 the stock intake is the one to get, its been proven time and time again.

[@chomin3025]

Big CI engines are the ones that need the extra air, same in the head game.

[@Backupnow-gf7wb]

You need to put a 102 Throttlebody on the stock intake, I like to see those numbers 👍👍👍👍👍

[@sepg5084]

Won't fit.

[@Kekzuu713]

@@sepg5084 What size is stock ls3 intake? Trying to figure out if I need to buy intake and tb or just tb

[@FredRTP96]

Gpi tested this and had 0 gains

[@topvideos6166]

Thank you for this test . I was planning to go with bigger intake then what I have now which is the MSD 102. I think it's almost the same one of the Fast small intake which is the best mod of the street dually driving also good for the natural aspirated engine with no boost

[@nowayjose596]

Gwatney Performance and Hot Rod have done the same dyno tests (except Gwatney used a ported LS3 intake). Gwatney saw the same gains when going to the 102mm TB vs the 92mm on the FAST, but commented that in their experience those gains don't transfer over to the chassis dyno due to the design restrictions of the intake plumbing leading up to the TB.

[@huntermckinley593]

I could see that for sure. My tbss has a 3" intake right now and 90mm tb so when I do go with a fast 102 and 102mm tb I'll be building or buying a 4" intake with ls7 maf because otherwise it's a waste of money buying the bigger throttle body. One thing I retained from college is air/fluid/electricity will only flow as much as the smallest diameter in the system. You can have 10 miles of 4 inch pipe and 1 inch of 3" and it'll only flow what that 3" can flow

[@Doucettedon]

I would keep the LS3 and stock throttle body and invest the leftover pile of money towards a turbo and tune.

[@tonkatoytruck]

Hard to beat that LSXR for stealth and performance.

[@christophermix6845]

Impressive how much power that throttle body added!

[@Chris-yy7qc]

More like: How much it unlocked. ;-)

[@christophermix6845]

@@Chris-yy7qc true haha.

[@shadowopsairman1583]

Bigger hole

[@aphil4581]

It's like the hole engine build was to show that a 440Ci 630 hp engine has to have and needs a 102TB.

[@bigredracer7848]

All them intakes will fit fine under the hood of my suburban

[@VinnieSuhfatwop]

What motor mounts are you using to have the highrise fit??

[@VinnieSuhfatwop]

I have an 86' and doubt that would fit

[@james10739]

That is minimal gains on a lot bigger and Wilder motor than most of us are running so there would be less of a change

[@MrDerekRobinson]

Yeah I didn't know majority of the LS guys on the track and street were running 441 Cubic Inch LS engines 🤣

[@ShawnGilbert1967]

If they are NA they may, what I'm stumped at is why not LS7 top end when your talking 441ci? I'm basically using a HD stock replacement head on my sleeved 427ci engine and gain 50hp stock to stock...LS3 vs LS7...why on earth would you go to 441 and not run a monster raised runner say MAST Black label LS7 head which would make big power with more compression on this.....most of the big shops move over as soon as you go 4.125 bore plus.... Nothing wrong with LS3 top end but this engine is obviously not worried about a little extra money....

[@racerd9669]

You really needed to test the Escalade factory intake and the CID intake.

[@UncleDonDon]

I would've liked to see a stock truck intake tested. I've heard tales of sneaky power......when you can fit it under the hood.

[@TheCycle2300]

Gee, did you pick a big enough cam? Not at all a "common" set up.

[@randallsavage3795]

I went .4 quicker after junking a sheet metal intake for a fast lsxr 102 with the stock throttle body. Recent dyno pulls indicate the shorter runners should help the combo. combo is a big C.I. pump gas N/A setup.

[@mikeverything4098]

I just bought my trans am I’m on a budget and by the end of this year I would like to be at 500 hp please anyone with knowledge of the stock ls1 drop the best and cheapest combos I can do I’m 20 and have help from nobody but my damn self

[@vikenlink]

I have to mention…. Great test, love intake comparison tests… BUT…. You’re over caming the engine and are loosing power everywhere except maybe peek RPM. The intake and exhaust duration is to high, not a good cam choice for the stock LS3 intake or any long runner intake. A 440 ci LS Stroker engine should be using a cam 234-238 intake @ 50 and a exhaust duration at about 246@ 50 with a 110-112 LSA . I believe you will make more power and torque with all the intake manifolds being tested throughout the power band. I know what I’m talking about from experience.😏

[@srage9188]

This setup should be pushing 660hp on 93 and 700hp on race gas. Too much cam, and cylinder head and not enough port velocity or compression. Just my opinion.

[@OEMishGarage]

It would have been interesting to see a ported stock intake with the rod mod tested as well.

[@smokingasphalt8050]

Agreed! Excellent test here none the less👍🏼

[@Mosfet510]

I like that fast lsx r 102, that and the sniper gave a big bump in the numbers. Nice one.

[@andrewcammer2535]

I'm trying to imagine building a big cube motor like that with all that camshaft (which undoubtedly needs more split) and then saddling it with abysmal sub 8:1 dynamic compression. Imagine how much more responsive and driveable that would be if it gained a little LSA, added 10* of exhaust duration, and slide the static compression up into at least the mid 12.x:1 range. Guessing we got a combination built for something else, and just got pulled into some NA testing.

[@ShawnGilbert1967]

I was thinking same thing, needs to even for street 93 be at least mid 11 to 1 like 11.7ish with that cam, setup a flex fuel tune... I'd like to have seen a better cam but also for love of God the mid length LSXHR runners vs the Hi Ram would have been awesome, same for mid on the LsXr vs the HR and Hi ram... Nice data though...

[@transmissionsrus6808]

Does the Fast LSX with the 102mm throttle body require tuning?

[@JorgeRodriguez-jd7qe]

Yes to adjust air flow and throttle response

[@lewtninja]

the real question is why would you put ls3 heads on a motor with a 4.125 bore? it should be ls7 heads as they make more power everywhere.

[@kwdthatsme2711]

Outstanding Test and video etc… Congrats on the effort and thank you for making time to produce this test/comparison action - much obliged, Sir!

[@TheHorsepowerMonster]

Thank you!

[@justingriffith2991]

@@TheHorsepowerMonster ls3 is good foorbcar

[@Ls_corvette]

I need that fast 102 throttle body and mainifold. These supercharged jags at west palm need to get beat even harder than k already spank them.

[@jamestehuna5915]

I just got my first V8 SSV Holden Commodore and this video helped me so much with which way I want to go in my build

[@TheHorsepowerMonster]

Awesome! Thanks for watching

[@dougleitz1134]

What a cool car! I always wanted a Pontiac G8 but settled with a mild built 07 GP GXP

[@jamestehuna5915]

@@dougleitz1134 I hope you get it mate

[@jamestehuna5915]

@anonymous I’ve got a walkinshaw intake throttle body I don’t have yet but I’ve ordered a 102 mm airflow throttle body billet

[@Thedonron12]

A stock LS3 Intake Manifold with the "Radius Mod" applied is the best bang for your buck.

[@angelb4143]

Radius mod? As in port the stock manifold?

[@Thedonron12]

@@angelb4143 Negative, as in add steel rods above the intake runners to increase velocity. Google LS3 intake manifold rod mod

[@angelb4143]

@@Thedonron12 thanks man!

[@Thedonron12]

@@angelb4143 No problem! Check out my small channel. I made a few videos on mine with the rod mod , and a dyno.

[@angelb4143]

@@Thedonron12dude I just checked and ive already watched about half of your videos! Lol didnt realize I was speaking to the famous donron! Haha sick vette man that spinmonster sounds sick!

[@mathewshackelford8037]

What size injectors did he swap to with the 102 intake?

[@andyromero7145]

This is a great video literally answered all my questions thank you!!

[@joshtheking1772]

Stopped watching at 5:40. You ruined the test. Get it right.

[@TheGuruStud]

These engine dynos are more inflated than kiddies claims on Honda forums

[@timewarpvideo6244]

Impressive gains by adding the throttle body

[@wayne007nz]

99% of us dont have a 441 square bore LS with custom heads, so which is actually best for the average Jo with a stock to mild engine.

[@MrDerekRobinson]

Yes we do. They said it the video. You have a 441. You just need to act like you do and pretend like the rest of the guys in the video

[@ricoElGallo]

That lsx gon need a bigger cam and better headers for max performance. For me thats gonna be the go to even tho looks wise im not a fan

[@shaneshane1379]

440? And all it made was 600! 😂🤣

[@gmcstacy1065]

They kept changing the throttle bodies and swapped injectors. Thought this was supposed to be a test on intakes only. You cant compare when additional mods were done constantly. SMH

[@TheHorsepowerMonster]

Engines are a system. With the stock manifold, the injectors were at just over 90% duty cycle. Enough to make sure we got the most ourt of the stock intake manifold. But we knew the aftermarket manifolds would be able to pull more air into the engine. So if we left the stock injectors in and max'ed them out on the duty cycle, we'd get an artificially low number for the intake performance. Since they are capable of more, they needed more injector. If you left the same injectors in them, you get the result that the aftermarket intakes really aren't any better than stock, when that's not true. Same with the throttle bodies. The stock throttle body is properly sized for the stock intake, so that delivered it's best performance. Some of the aftermarket intakes had a larger throat, so we installed a throttle body that matched it.

[@georgeowen2083]

LSX intake is a fucking ripoff for 1200 dollars and only giving you 5 extra hp with a stock throttle body but an extra 15 with an aftermarket throttle body. I could think of some way better ways to increase power for 1200 bucks.

[@masonmcnabb2429]

Stupid question but, I own a 99 Silverado with 5.3 vortec, what intake would fit on this?

[@loganamurray64]

That should be a cathedral port engine, your best GM intake to use is off a Trailblazer SS, they aren’t too hard to find either

[@Bikemad24]

Im here to see how different his results are to Richard holdiners

[@QRS365]

can a ls intake fit on a 2001 bmw x5 4.4? They look so similar.

[@thomasparrigan7807]

I got a 6.0 with ls3 heads and intake swap and btr3 stage cam this is nice to see this applied ob the dyno great video

[@TheHorsepowerMonster]

Thanks!

[@bdpilot28]

So, in order to get about a barely noticeable difference in HP and torque you have to spend close to two grand!

[@Friedbrain11]

So no test with the bigger injectors and throttle body on the stock intake? Not a complete test! Looks like comparing apples with oranges for some of the manifolds.

[@TheHorsepowerMonster]

Not really. The bigger injectors would not have helped much with the stock manifold. The stock injectors weren't at full capacity yet, we just upgraded because we knew that the aftermarket intakes could flow more air. Bigger injectors may have changed the curve some but wouldn't have made a big change. Likewise, the Holley Sniper throttle body wouldn't have helped on the stock intake because the opening is only 90 millimeters in diameter. Putting a bigger throttle body wouldn't have helped because the throat on the intake manifold is the choke point. Not even sure if it has enough material to allow you to port the intake large enough to accept the Sniper throttle body. Thanks for watching.

[@baby-sharkgto4902]

The injector wasn't at all limiting the power of the LS3 intake but it most likely would have limited power on the better intakes if they didn't replace them.

[@cperales98]

I wonder how she would do with bigger primary headers

[@vortecturbo]

Two things that was a poor camshaft design for the setup those heads look very promising and it had very little compression for that big of a cubic inch now mind you if that's set up would have been 12 to 1:00 which would have ran on 93 not optimal but would have ran on 93 and a camshaft along the lines of 258 on a 113 plus 3 268 or 272 at 50 on the exhaust side all of those intake manifolds would have done better but the Holly High Ram as well as the fast High Ram would have shined a lot better and had a lot more torque in the mid-range

[@jessicaembers924]

10.7-1? Shit, my MX-5 Came 13-1 right out of the show room! And those manifolds ALL Look weird.

[@damianellis3554]

You already stated that it was unfair test I mean you changed injectors on the stock intake manifold from the fast which pulse with has a lot to do with Flo so you could have picked up some power there and you could have seen if the larger throttle body would have been proved flo all equaling two more power not really a fair test but I see you trying to sell your engine builders vs true test

[@TheHorsepowerMonster]

How many people upgrade their fuel injectors on a stock intake? What's the point of testing it if nobody is going to do it? And likewise, if the higher flowing intake calls for more injector, it makes no sense to choke it off with the stock injectors. When I said it was an unfair test, I was only saying that the two high ram style intakes perform best with some form of forced induction.

[@baby-sharkgto4902]

The biggest injectors in the world would not have gotten anymore power out of the LS3 intake...... but yes there probably would have been a few ponies to be had by putting the larger throttle body on the LS3 intake but it would not change the results as it still would have finished last.

[@GreatestHITS26]

I want that accessory drive you guys have on that engine for my ls engine where can i get the belt? So that everything works right

[@keyvobless]

Gonna look into the sniper throttle

[@prestigemotorsports]

Great video as always, Jeff!

[@michaelkattouah2154]

I have a saab 5.3 and the OEM TB is 87mm and if i put the fast LSK on do i have to get a 102mm TB to see increase

[@VAMCVETS]

I thought the FAST intake wasn't worth it unless you have heads, cam, etc. to really make the gains worth it?

[@armondogarcia7532]

The lsx fast with 102 Th.body an 100oct. Gas an your good,, if the rest of the engine is up for it lol

[@jamaalbarnett8161]

Amazon prime says that the LSXr manifold doesn't fit my 2011 camaro ss...

[@jeremialvarez6558]

Can I use the 102mm intake manifold upper with the stock lower shell or do I need the 102mm lower shell?

[@jesusmj602]

I have a 2012 gmc sierra 4.8 does anyone know if it has one of those manifold left?

[@OD_Plays]

I don't know if I should get a ptr or a mid for my ls7. Can someone help out

[@ktwosrt8life]

Can we please see one for the hemis I love your guys videos

[@jramirez9091]

So which one do i buy

[@88_TROUBLE_88]

Stick with the stock

[@Sebastianbartledoo]

why didnt that thing make 700hp? thats alot of motor

[@aphil4581]

Shows that the stock Ls3 heads can make as much power as a ls7 with after market parts, big cubes, low compression and freak cam with a tiny split for high rpm. Not something I would build though. A good heads cam with 12 to1 compression on 93 octane 416Ci would have been a much more common street/track build.

[@loganamurray64]

But at the same time, with heads a LS7 will pretty easily make 700whp N/A. Displacement always wins in the end

[@mattmo8611]

Impressive how little this does to the ls3.

[@custommotor]

Since this is on a engine dyno and not in a car. Why not start at a lower rpm? Like off idle? Most cars live between 1-4K RPM and we never see how they perform down low.

[@MrDerekRobinson]

Because no one actually builds stroker motors to be heavily interested in the way a car performs between 1 to 4k rpms like they're trying to save on gas mileage for manifold choice selecting purposes as they do based on mid to high rpm power when choosing. Living in 1 to 4k rpm is also driving in multiple gears which the power output would vary by which gear based on current desired speed and won't be much worth the comparison at 1k to 2k rpms. A range that is over in matter of milliseconds. That would basically multiply the time it takes to test all these intakes and no one lives in 4th gear for dyno sake from idle at full throttle in a muscle car for study sake when these intakes have a very specific operating rpm efficiency range starting from 3k rpm and up.

[@Wasdfg603]

What’s the difference between him and Holdener’s test?

[@CC-wt9vi]

Been best to test it on a stock ls3 motor. Not a modded one.

[@TheHorsepowerMonster]

The engine would have run out of power before the benefits of the more aggressive intake manifolds would have shown up. These aren't intakes designed for stock engines.

[@chriscraft77022]

damn

[@williambartholomew5680]

Like to know how the sniper TB compare to the stock TB on the dyno, bet it's better bang per buck horsepower than the intake manifold

[@massivefins2597]

Where was the Holley AirForce intake? Its supposed to be the top intake on the market... uhg...

[@TheHorsepowerMonster]

I could be wrong -- it's happened before -- but I didn't think they make one for the LS3. Thanks for watching

[@massivefins2597]

@@TheHorsepowerMonster ooops your right, its LT1, LS1, LS2, LS6-7 only.

[@arealmaintenanceandrepairl1103]

do these all need tunes

[@darnice1125]

Too bad you didn't test the stock intake with the bigger TB (if it would fit) and the larger injectors. Would have been more fair then.

[@TheHorsepowerMonster]

The larger throttle body doesn't fit. The throat on the stock intake is too small.

[@ayo3v]

what engine ltr is that ?? great video !!!!!! 👍👍👍👍👍👍

[@TheHorsepowerMonster]

441 cubic inches = 7.2 liters

[@kingcosworth2643]

They should of tested the stock manifold with the 102mm TB

[@TheHorsepowerMonster]

There isn't really a point to that. The bottleneck is the throat of the intake manifold, so adding a larger throttle body won't help make power.

[@artagain8977]

Would love to see this comparison on a stock LT1.

[@shadowopsairman1583]

Gen 2 or Gen 5?

[@chesspiece81]

Is this a stock block or s Dart block? It looks like those are 6 bolt heads bur they're not being used. I can only imagine what that 441ci engine sounds like with that cam. I built an 11.8 CR 416ci LS3 with a 240/250 with .623 .617 114 and it sounded awesome.

[@aphil4581]

I'm building a 427ci ls3, 4.1 stroke. 11.7Cr, Dart pro1 heads, Cam Motion 688 lift 248/263 112 split. 7600rpm/750hp. Fast 102B.

[@chesspiece81]

@A Phil As cast Dart Pro 1 and Fast or ported? I hope it's going in a light chassis with a ton of rear gear and high 4200-4400 stall converter if automatic. If a manual behind it use a light flywheel and clutch to get it to Rev quickly. I had a Yank SS3600 in a 4L65E with 4.10 gears on 28" tall tires. I needed a 4200-4400 stall and needed to port the L92 intake, 102mm TB, and spent more time on the tune it would have gone from 11.8 to 11.2-11.4. Your setup will probably eat up nitrous like mine would have but I never sprayed it.

[@aphil4581]

@@chesspiece81 Going to use a Fast Mid runner. Old setup 1998 T/A 418Ci. ls2 Stroker. GMPP ls3 heads, Stock intake 98mm tb, 4l60 Moser 9" 4:11. 3600 yank. 10.90 1/4mile 1.5 60foot.

[@chesspiece81]

@A Phil I had WCCH Stage 2 or 2.5 LS3 heads. Upgrading from those heads and intake, your displacement bump and cam, swap from that 3600 to a higher stall. The Fast intake does really well sent to Tony Mamo to be ported, especially on that many CI. I think Greg Good is the go-to guy for the Dart Pro 1 heads. At least he was when I had them on an 8.8 CR 408ci Va Speed spec 236/236 .632 114LSA cam for a turbo 4th Gen Camaro. Are you going to run the motor on E85 or just 91 or 93 octane? With a progressive 125 or 150 shot and traction, there's no reason why you shouldn't run some 9.3-9.5 on spray and maybe some 10.2 off.

[@K-Effect]

I would've liked to seen what the stock intake manifold would have done with the bigger injectors and the bigger throttle body. I don't even know if you can put a bigger throttlebody on the stock intake? As always another great video, thank you

[@TheHorsepowerMonster]

The throat on the stock intake is so much smaller the larger throttle body wouldn't have done any good. Thanks for watching.

[@jebadias1468]

I had to replay the comment at 2:08 three times to make sure I heard right. "Nothing to fancy or out of the ordinary which is exactly what a lot of guys are running both on the street and at the track". We defiantly have a different idea about what constitutes "out of the ordinary" and "a lot". I don't know anybody who has that kind of engine, let alone runs it on the street. I understand using an engine which moves a lot of air to stress the intakes, but you would have to be pretty out of touch to try passing that off as anything close to common.

[@sergeantseven4240]

No LSXRT?

[@salem4975]

What the pest one intake

[@smiller225]

Why is that motor making peak power at 6000? Cam size compression?

[@loganamurray64]

Part intake manifold, part cam mostly

[@Meekmillan]

Maxbore to the rescue lol

[@HioSSilver1999]

That motor needs atleast a 105mm tb

[@Someday.1992]

Ok Richard

[@lawrencecarter5917]

Ls3 for me guys

[@theog378]

Wich is the best one ??

[@paciencia0956]

Supercharged.

[@frankquinney789]

you forgot the MSD Atomic Airforce

[@TheHorsepowerMonster]

They don't make one for the LS3

[@manitoublack]

would have been good to test the short runner options inside the LSX-R? keep up the good testing

[@joejones2705]

😊

[@painpain4836]

Great information

[@mikeeagle2653]

440 ci and it only made 500 hp. Something very wrong.

[@TheHorsepowerMonster]

It never made less than 599.7 and as much as 637.4. What are you talking about?

[@mikeeagle2653]

@@TheHorsepowerMonster I watched it again I misheard the first number. Still down on power. You can get 550 hp out of a 5.3 with stock heads. This motor should be making 700 plus

[@23steph13]

Would a fast lsx intake make sense for 317 heads?

[@phillipjackson4734]

Yup it's gone breathe more

[@Unique1Media]

Need these 4 go up against Hellcat, demon & 392 manifold? So we have options to choose from before we buy !

[@MrDerekRobinson]

Confusing. Those manifolds don't go on an LS engine to compare

[@loganamurray64]

Hellcats and Demons don’t really have manifolds thanks to their superchargers, you can’t really compare a boosted engine to N/A like that. The LS3 does have a better factory intake than the 392 though

[@Unique1Media]

@@loganamurray64 demon is 6.2 unless they put 392 in it

[@Unique1Media]

@@loganamurray64 6.2 more powerful than 392 n why NHRA uses demon motors 6.2 in the cars at NHRA Tony Stewart, (female) driver uses 6.2

[@Unique1Media]

@@loganamurray64 overall? 5.7 can handle upgrades better than any Hemi.

[@zero-fg1012]

Very awesome

[@shadowopsairman1583]

Depends on rpm range too

[@romemedina4733]

398 vs 409

[@jareknowak8712]

I wonder what are the differences in filling between individual cylinders. BTW, Thanks for the video, great job, as usual!

[@TheHorsepowerMonster]

Thanks a lot!

[@NextGenGamer777]

what fuel injectors did you use when using the Fast LSX r, and the Sniper 102mm?

[@kevintunaley5079]

I feel that was cheating the stock intake

[@yatubekid]

Great test and explanations.

[@TheHorsepowerMonster]

Hey, thanks a lot! And thanks for watching

[@ozielplatas7472]

Can any of these fit a 2017 6.2 Denali ?

[@phillipjackson4734]

Yup ls block

[@TexasGTO]

No MSD? Odd...

[@CLEEPER1]

Msd dont offer an ls3 version

[@subz3ro43]

@@CLEEPER1 MSD works on LT engine

[@CLEEPER1]

@@subz3ro43 it works on all ls motors except ls3. I have one for my Ls7