SUPERCHARGED 4.8L vs 6.0L Full BOOSTED Results!

Supercharged Shoot Out-4.8L versus 6.0L. We test the effect of displacement on power by comparing a modified 4.8L to a larger 6.0L both NA and with a Vortech Supercharger. Both motors were run with the same blower, intercooler and pulley combo. What happens to power and boost when you step up to the larger motor?

[@vaugr1917]

the questions we all want answered and nobody wants to test! Your video series is pure gold!!!!!!!

[@dilsher12]

Love the 4.8 stuff

[@lukestrasser]

I learned that if a boosted 4.8 is good, a pair of billet wheel S480's on a 540 BBC with some Brodix BB3 Extra O CNC ported heads is better. You've now spent the college fund for all my unborn children. You're the best Richard!

[@ls4.8frank]

I like my L20 4.8L. I have the Gen 4 engine so the rods are stronger and I have the good flowing 799 heads that I lightly ported. Along with a TSP stage 2 turbo cam, CHE rocker trunion upgrade, PAC660 springs, LS7 lifters and new GM trays and VVT delete along with a 76/75 turbo kit, 80lb injectors and a Walbro 450 pump and a built 4L80E. Such a great daily sleeper with around 650RWHP

[@TheJMan1K]

That would be POTENT in a Fbody man

[@ls4.8frank]

@@TheJMan1K you aren't lying there. Probably why you can barely find any Gen4 4.8L engines anywhere. Lol. It would definitely be a reliable killer on the street no doubt. Hell even at the track in a bracket or index class it would be fun as hell to race.

[@fixitluis]

Talk with hands, in short statements, youtubers love it, happy new years, and have a good day

[@CanIbeFrank]

I don't lol. Ps. You'll probably like my channel if you're into cars. Over 2,600 car videos and counting

[@steveg2277]

4.8’s are fantastic for boost. Short stroke, thick walls, iron block, etc. put in some good internals, good heads and the right cam, they can make 1000 easy.

[@fatnfurious9171]

Stock internals it made over 1000 hp

[@Ismaelj100]

What about 5.3 iron blocks? Or should I just spend for the 6.0

[@steveg2277]

@@Ismaelj100 All depends on your goals. Iron block 5.3 Will work just fine. The 4.8 provides a little more wall is all, but the Stroke is the same for both 4.8 and 5.3 if I recall correctly. The 6.0 is always tempting and are solid. If you’re going ground up I’d start with a 6.0 block myself, but if I had an iron block 5.3 already I could see myself sticking with that. I’ve built many boosted 4.8’s and 5.3’s that last longer than, or are comparable 6.0’s. Just my thoughts. Good luck!

[@clifftonjones1057]

@@steveg2277incorrect there same bore on 4.8/5.3 the 4.8 has a shorter stroke and different pistons

[@williamkillingsworth2619]

Remember boost pressure is a measure of resistance!

[@kwik440]

OH MY GOD !! THANK YOU for working your ass off to educate me ! (US)

[@camaromustangmods3327]

Really enjoy your channel. No nonsense straight to the numbers and results, no bs.

[@baby-sharkgto4902]

I noticed that when boosted you didn't bring either engine to as high of an RPM as you did when the engines were NA. I know from experience that when you put a Centrifugal supercharger on a given engine that the engine simply will not rev as high as the NA version of itself. I'm surprised that you did not mention that. Thank you for all of the amazing videos, Richard. We gobble this shit right up!

[@richardholdener1727]

I haven't found what you describe to be true. In fact, the risking boost curve offered by a centrifugal increases the rpm where the motor makes peak power. Power was still climbing when we shut it off

[@baby-sharkgto4902]

@@richardholdener1727 oh really? That's never been my findings with the Prochargers I have installed. Either way I love your videos man!

[@NickKautz]

Power will start to fall if you reach the upper limits of the supercharger rpm even if you're only at say 5800 rpm on the engine. Such as a D1SC on a 6.0 with a 3.x pulley

[@SoFLaZ06]

loving the new audio setup

[@steven44799]

fantastic content. its like engine masters but with more detail as to why the results are the way they are. i expected the result to be that with the same pulley setup the 4.8 would have more boost (due to it being more of an airflow restriction than the 6.0) i didnt expect the 6.0 to make that much more power than the 4.8 though, i thought the HP would be much closer together and the boost difference would be larger if everything else was equal except capacity.

[@asb2106]

i love watching holdner, but thats not to discredit engine masters. totally different approach and delivery of the content. if engine masters was asked to do a 4.8/6.0 comparison under same boost conditions, and they chose to do it, they would do it similarly. No need to discredit one to prop up another. MTOD does a good job in my opinion with the engine masters show!

[@tommyhathaway9190]

Steven W the cams made the most difference. The 6.0 had a way more agressive cam and heads. Plus the 4.8 is supposed to be revved higher. Redline for those is in the 7000-7300 range. It’s not a fair test at all.

[@tommyhathaway9190]

Dude, if you want to test the real effect of displacement use the exact same heads and cam as well. This here was a sham.

[@s0meguy809]

the 6.0 was still climbing really hard at 6500rpm too.

[@RadDadisRad]

Except engine masters is about some pretty gnarly setups

[@frtaylor29]

Holdener killing it again! Video suggestion: 6.0 big cam/small runner heads vs 6.0 baby cam/big runner heads.

[@cesare8020]

The old adage, no replacement for displacement. And all that I've really taken away is that, boost is a measure of restriction, not horsepower. You want big power, start with an engine that can breath well. So that when you add boost. It only enhances what you have. Instead of masking what you dont.

[@shadowopsairman1583]

Remember Bernoulli principle of venturi effect, take a 5 inch pipe and taper down to 3 inches, in 5 inches air pressure is higher but air velocity is lower, as air goes through the venturi (taper) air pressure is reduced and air velocity increases. If you go back to 5 inches the air pressure increases and velocity decreases

[@ts302]

Great video Richard! As a follow up, how about installing a turbo(s) on either engine, same boost level, to compare blower vs turbo HP/torque! Videos have greatly improved! Thank you, Tony

[@chrisfuller8584]

Turbos will make more power at the same level bc of the drag of the supercharger. Thats power to make power with a supercharger... And it will be impossible to run the same test as superchargers bc ot the linear boost level. A turbo will come in alot sooner.

[@kevinwest3689]

@@chrisfuller8584 I'm not a know-it-all and I don't have a power adder, I'm nobody, I agree with everything you said, but the last sentence, I've never heard or talked to a racer that says a turbo comes in sooner, but I had heard them complain about losing because they didn't spool, superchargers are spool from the get-go are they not? Turbos run off exhaust pressure. One of us is awfully confused it's probably me , I'll have to double-check I have a four-wheel drive truck and was planning on a supercharger because of what I thought I heard everyone else say. I hope you're right I can turbo cheaper than a supercharger.

[@invertedpolarity6890]

Would love to see the difference between a PD cam and a Centri cam on the same engine; both NA and under boost.

[@GregoryBrettin]

I like the videos like this. 15min range is about perfect.

[@Turbogto_guy]

I’d really be interested in seeing the difference in a 4.8 vs 5.3. Everyone is using the 5.3 these days.

[@soundslikealot]

Kfx Guy +++

[@tommyhathaway9190]

Kfx Guy I mean, this comparison is flawed. The cam in the 4.8 wasn’t nearly as agressive as the 6.0. Plus the 4.8 likes to rev higher. He should’ve used same cam and heads to make a fair comparison.

[@Turbogto_guy]

Tommy Hathaway I really meant to post that this morning. Truth be told, I was driving and listening to it. I couldn’t watch it and the cam specs weren’t retained in my memory. I had planned on going back and watching it. If the heads, cam and compression aren’t the same. Then the test isn’t really comparable.

[@fry863]

@@tommyhathaway9190 the ci difference makes a comparison like that very flawed. honestly i'm not sure what would make the most accurate comparison but I'd think it would have to be heads and cams that brought evened out their respective thermodynamic efficiencies.

[@roknroy1]

the results are linear 72 cubes gave 150 hp na and sc. 4.8 to 5.3 is approx 40 cubes or 80 more hp on a 5.3

[@RyanlaBlue51]

This is perfect! Haven’t watched it all yet but really wanted to know.

[@MJTAUTOMOTIVE]

Congratulations on 10k Subs Richard!!!👍👍👍

[@richardholdener1727]

thnx

[@rongravel4585]

Really should have revved that 4.8 to 7200-7500 range. That’s what makes the 4.8 great is the short throw crank (3.27) You can see on the graph too it wanted to keep pushing. I bet the numbers would have been a lil closer and utilized the best part of the 4.8 Being able to rev it ouuuttttt

[@dougkreutz7701]

What I took away from the video is how slowly those centricals build boost. My Kenne Bell 2.8 on my 6.1 hemi makes 12 lbs from 2000 rpm all the way to 6400. Will be sticking with my more area under the curve blower.

[@jaydunbar7538]

If a more aggressive boost curve is desired it really is as simple as swapping pullies.

[@richardholdener1727]

those work well

[@sepg5084]

screws are generally more efficient at lower rpms, centries are generally more efficient at higher rpms. screws are for people who need the low-end torque advantage and are willing to spend more, while centries can cost less, weigh less, and be easier to package. Higher Wheel Torque can be achieved thru lower transmission gearing anyway. Centries have wider choice of intercooling options too. i guess screws have the advantage on drag strips with prepped pavements, ice tank on the trunk, and drag slicks. Centries may have an advantage on circuit tracks where there's no prep and too much torque on a corner exit can cause trouble.

[@jasonmouton4662]

You cant really compare a positive displacement blower to a centrifugal blower they are 2 different animals

[@LunarOutlawsGarage]

Very happy to see you so this combination is very similar to a what I am putting in 71 Buick GS

[@richardholdener1727]

love those cars

[@markdonovan9247]

thank you for this video i am trying to figure out what to build for my c6

[@Cultofpersonality09129]

Nice test, thanks Richard!

[@brandonpanozzo86]

You are the man richard growing fast man you deserve it

[@markrich3271]

Boost is measure of restriction. The 6.0l is bigger than the 4.8l . The set quantity of cfm coming from the supercharger is less restricted on the 6.0l.

[@I5ZQ8]

That 4.8 is impressive holy cow.

[@leomedina5614]

Jose Gutierrez It’s very reliable and very underrated but a lot of people miss out on this engines and go bigger.

[@ronaldlewis6062]

Thanks for sharing the comparison of engine combos . Like your school of training!! Hot Rod On !!!!!

[@chrispoole2616]

Awesome video. Thanks Richard

[@tptrsn]

Great stuff Richard, and congrats on clearing the 10k subscriber level pretty quickly! Can't wait to see that next video!!!

[@natepierce1281]

hell yeah, excited for the next video. Thank you for sharing.

[@madvtecyo546]

For 99% of people 4.8 is all your need 👌🏼

[@InvincibleExtremes]

I love these videos

[@demontech06]

I dont know if this has actually been done yet, but what about a junkyard test? What I mean is testing all stock engines using junkyard parts. To some people that doesn't seem all that interesting, but these LS type engines used different heads. Some had larger chambers, while the others had smaller ones. The media I've seen seems to be filled with confusion as to what heads would achieve power gains. I know some don't have the funds for the fancy equipment that you use. There's too many people asking questions that just aren't being answered correctly. Most of the answers I've actually seen were based on opinions, rather than facts. Nice videos.

[@2GSpyderTurbo]

Would you be interested in a video discussing VE and it's effect on NA , SC and turbo applications? Does a good VE (such as Honda H and K series) mean that you can take better advantage of high flow FI applications? Also, does a lower VE mean that you have better low and mid range power. I noticed that most stock turbo engines have a low VE compared to equivalent power and displacement NA engines. How does that apply to the massive difference in torque/power curves as well as overall thermal efficiency? Love this series and keep up the awesome content.

[@richardholdener1727]

Boost multiplies what is there-a powerful na motor equates to a powerful FI motor. That's why motors like the B or K-series Honda make so much power under boost relative to their displacement

[@nelsonperez9385]

Meaaaaaaaaaan you just keep making this awesome content. keep up the excellent work.

[@brandonr9918]

Morale of the story, get a 5.3 baby! ❤

[@jaydubb71]

As always, displacement and airflow + boost = more power. Hence the reason my turbo combo is starting out as a 6.0, vs the 5.3 I had originally. Plus the LS3 heads flowing better and being less shrouded than they would be on the 5.3.

[@dilsher12]

Depends on your goal , a turbo 5.3 can make well over 1000hp without breaking a sweat .

[@jaydubb71]

@@dilsher12 agreed. But with how much boost and with what fuel? No I'm not suggesting trying to make 1000 on 93 octane. I'd rather make as much power as I can on 93 before even going meth. Bigger displacement and better heads make that a lot easier. And the right turbo/supercharger.

[@dilsher12]

@@jaydubb71 If you are octane limited , having bigger displacement helps for sure . I'm running a gen4 alu 5.3/S475 and had to run water/ meth to go past 10psi of boost, no E85 here . Running 17lbs now and over 700whp and its more than enough for me as its primarily a street driven truck . 6.0 and ls3 heads are a very good budget friendly combo .

[@jaydubb71]

@@dilsher12 again, agreed. I'm not too octane limited here. Just don't want to rely on Meth. We have some E here in the DMV area but until it's widespread E availability, I'll try to stick with 93 with a dash of meth.

[@hereinmissoula11]

You really need to actually test lsa !! Especially in boost !! Maybe 4 cams or so identical lobes just different icl and lsa . Maybe a 104, 108 , 112 and 116 ... duration modest in 230’s or so and not a huge exhaust bias like most shelf cams .

[@jorgefive0]

Subscribed! Great vids so far, this video makes me happy I’m starting out with a 6.0 first

[@Rajivc666]

Great video, thanks for doing this.. You mention that even on a positive displacement supercharger the results would have been same. Don't positive displacement scoop same amount of air from the charger intake and therefore if you ignore leaks should produce approx same power on both motors, provided it's appropriately sized. Ofcource the boost will be vastly different.

[@drewsharpe7484]

Proving the old adage of no substitute for cubic inches!

[@nathanielbolden5053]

I need this parts list!...I gotta 4.8 in my yukon!...and I'm about to order a 4.8l crate for my 72 C-10 project!...

[@derakbell8143]

Just gotta spin that 4.8 to 7800-8000, man that would sound wicked

[@kirikos65]

This is great. I would love to see you do a redo with David on methanol injection but real methanol injection by alki control. They use a hundred percent methanol alcohol instead of something like boost juice which has water in it. (Yes water will cool the intake charge but but makes no power ).keep up the great videos very very informative thank you.

[@albertchaidez6317]

Awesome video and cool comparison. Shoulda done stock for stock. The engines have different head and cam combos. Too many variants.

[@rebel4life383]

good wording on the explanation at the end

[@kswis]

Good stuff man, I know u can't make everyone happy but since your pretty much the LS wizard, I'd really like to see tips or do's n dont's, also very much like to see the items you choose to not put a lot of money into and the things you think getting nice parts for is important. Thanks for the videos. Glad I could hear this one 😂

[@MrCrazyking81]

Awesome content, subscribed instantly! You describe everything amazingly! I will watch every video!

[@blair79bear38]

or. jack the boost up on the smaller engine to equal the same power of the larger displacement. Then it doesn't matter which engine you find in the junkyard, you are effectively making them equal with boost. At least that is how my mind see's it. I want to find a 6.0 or a 6.2 in the junk yards for my 2nd gen Trans Am. but those engines are not near as common as the 5.3L. so, use a twin screw Kenne Bell or equivalent to jack up the low down boost to make if feel like the 6.2 or a bit more. After all, you spend more time with low engine revs than you do spinning it at 6000 RPMS.

[@timgalvez3924]

I used close to the same setup 4.8(stock heads). The difference is you can add 25-28 psi to the 4.8. Where as the 6.0 you would have to heavily mod to get over 15psi. 4.8 makes 1235 awhp at 26 psi.

[@richardholdener1727]

you can run as much boost and power on a 6.0l as you can on a 4.8.l

[@stoltzstandards5911]

How reliable would it be though running that kind of boost though daily though

[@gregsmith8032]

Great comparison goes to show more cfm is needed at the same rpm cubic inch displacement shows the power

[@armyman2445]

Not really showing 4.8 vs 6.0 comparison with boost. To equally show the difference both engines need the same cam, and heads. The flow potential of the 6.0 is a no brainer over the 4.8.

[@ChurchAutoTest]

Totally agree. It's an interesting comparison, but too many variables. With the same pullies the blower should be moving very similar air mass. The bigger engine should do somewhat better (less restriction on the blower, lower charge temps, etc.). But a 20% difference, no, that's due to other variables. In the real world you'd never see such a comparison (you'd probably gear the blower for more rpm on the 6.0 liter), but if you're trying to assess the differences, you've got to control those variables better.

[@eprocess3248]

@@ChurchAutoTest all forged bottom, better flowing heads, 3 1/4 stroke w/huge cam@120 lsa and he shut it down at 6750? pretty stupid, it was just getting started I would like to see the numbers at 8500!

[@ThePeopleVerse]

You mean to say the old adage is true? There's no replacement for displacement.

[@suave871]

From the videos ive seen. Im going turbo with my 4.8. Looks like the shorter stroke would get into boost faster. Not building a race car, just a street truck. And I do a lot of highway driving.

[@shadowopsairman1583]

If you needfaster response use a smalker turbo to feed a larger or use a super charger

[@BlindBatG34]

Awesome content as always!

[@johnny2fast661]

Great job like always Richards..

[@timferguson1526]

Normally aspirated 572 is very tempting!

[@sidedownoreos]

Had a nitrous cam been tested in a boosted application. Have a friend thinking of going boost. And is currently a nitrous car. Just curious of the results?? Awesome vids btw I watched them all.

[@dalefrost4259]

With the same supercharger at 13.5 Psi I started with a cam similar to the 4.8 in my 5.7 and changed to cam like what the 6.0 has aand could run 8 degrees more timing and made 120 RWHP extra you should try the same test with that cam in from the 6.0 in the 4.8 on boost. Centrifugal blowers like na type cams with extra exhaust lobe.

[@trentdawg2832]

I’ve gotta 220/220 -.588”/.588” -114lsa cam in my n/a 4.8 and it screams all the way upto 7500rpm……my question is will this cam cooperate with the vortech v-3 supercharger in this video……considering I just got one not to long ago to put in my ‘73 c10 short bed fleetside….I plan on using 650cc injector…..I already went the lsa supercharger route on my nova with a 220/230-.553”/.553”- 117+4 cam in my nova and that cam worked great both n/a and boosted just like you said it would 😊……..I love these videos and don’t know why there is a line going through half of my comment….sorry folks

[@richardholdener1727]

THEY ALL WORK WITH BOOST

[@ericperry4934]

Did that blower spin clockwork or counter clockwise?

[@gixxer750axld]

your vids are great, just facts like we need. now if you would just include links to the parts your using that would be great too. thanks , axld

[@g-mech1244]

I would love to see a comparison between two turbo systems with bigger/longer intake tracks. Such as a traditional turbo system compared to a rear mount turbo system. The big question on bigger intake volume vs lag.

[@mrmidnight32]

Now run them both maxed out and see how the 4.8 stacks up with tons of boost.

[@hashslingnslashr463]

Iron block 4.8 can handle 1000 on stock internals

[@calivette805]

If you had a good cog drive is right! Me and a handful of other people have massive belt slip with that specific Vortech kit.

[@richardholdener1727]

yes-cog drive is a must for high power

[@lukassonntag3956]

I'd like to see what affect compression ratios have on spool time and boost levels

[@buiItnotbought]

I wonder how spool testing would be on an engine dyno. I think they can compare at same load but idk if that transfers to road conditions.

[@supertampon5]

Berserka Saurus i think vehicle weight also would effect spool time

[@richardholdener1727]

engine dyno not ideal for spool test

[@waynebollentin989]

You don't spool blowers only turbos. Boost is instant because it's relevant to rpm. You can sit there at 4,000rpm for 2 mins and it's not going to go up. Where a turbo engine at 4,000 rpm will increase boost without anymore rpm. Hence spooling the turbo.

[@waynebollentin989]

@@supertampon5 when your on the starting line and spooling the turbo. The Weight of the car has no effect on how fast it will spool. Things like engine size, hp, header type, turbo kit, etc dictates that.

[@zx6rkawi09]

This is good content! I like to finally see some Hemi content and I’m not a dodge man! Dodge really supports us straight line guys!

[@leadsled8961]

Really need a bigger short stroke like a 350 cid. (LS7 block + 4.8 stroke)

[@stschryer]

Durability test on both would be interesting

[@stonewolfshaw3435]

These videos are the best and very knowledgeable. Can you please use more junk yard engines lq4s specifically lol. I think a test on 706, 799/243, 317, 823 heads on junk yard lq4 with the same cam N/A and turbo would be wicked

[@thegdfp6447]

As always, awesome work! A 25% larger engine, similarly upgraded, should produce these results, I'd think. Specific output comparison show the bigger engine being strong low, losing it's advantage as revs climb. Small engine had more relative flow than ideal down low, big one ran out of excess breathing ability on top. Boost/backpressure would obviously be lower, since it's taking bigger bites.

[@charleswhitcraft1180]

What size injectors would you need for the lq4?

[@woog74]

Lower boost pressure = safe for cheaper fuel and longer engine life no?

[@ekess7458]

I'd like to see a test on coolant temperature vs knock threshold on a boosted engine. E85 and pump

[@frankrenda2519]

great vid thanks richard.

[@tbl8560]

That 4.8 was beggin for rpm. It needed to be setup to spin up to 8000 (if not 8500) and then see where the hp is.

[@izaiahorta8599]

This 4.8 NA didn’t make as much power as the 4.8 you used in you header test. Why’s that?

[@littleherms3285]

Shit cam.

[@trevorreding9909]

I get that bigger motor more power but being only 150hp apart whats the horsepower per cubic inch on both motors are they closer than we think on power out put after factoring in size of engine

[@yolofullsend]

Subbed. Liking the videos. No bs. Just facts.

[@RyanlaBlue51]

I would also like to see the difference in the two motors with turbos. I’ve always looked at 4.8 destroked abilities and wonder how efficient it would be compared to say a 5.3 with a longer stroke.

[@richardholdener1727]

the 5.3L will make more power assuming same mods

[@YLTMauto]

I think it would be better if they both had same type piston and heads under boost.

[@mattjonesturbo1]

Was there a reason you couldn't spin the 6.0 to 6,900 rpm, like belt slip?

[@3800TURBO]

Here in Aus we are de-stroking the aussie 6 from 4.0 to 3.7lt to let her rev. Guys are seeing 10500rpm with them and over 2000whp. Id be interested to see where the 4.8 tapers off using the same head and cam as the 6.0 Can see in your test even as was the 4.8 wanted to climb.

[@dwarfgrumpy]

Here is an interesting comparison. How about he 4.8L vs the L25 292 cubic inch straight six?

[@HioSSilver1999]

Shoulda revved it out more.

[@monsterram6617]

Boost is a measurement of restriction. That's why the 4.8 "makes" more boost. Just looking at one, or a few numbers wont tell you everything.

[@jaydollar140]

Nice videos bro! Any videos on 302 & 351w Superchaged?

[@richardholdener1727]

I have tested those a lot-will post some

[@jaydollar140]

Richard Holdener Im looking to do an junkyard 351w roller motor that came out of an f150. I gonna keep the bottom end stock . I’m gonna add a roller cam & take my Trickflow 170 heads off my 302 & Vortech v3 Superchager. How much power do you estimate at 10psi?

[@knockingontheclouds1153]

Good work!

[@davidreed6070]

Richard, if you raised the static com ratio would that be the same as raising the boost.

[@avelardoontiverosiii5364]

No replacement for displacement

[@fasteddy]

Great video Richard as always. If you can continue to give us fuel and timing, e85 I'm assuming 😉 18 degrees????

[@nosnerd1967]

A great test and comparo 💪🤛👌

[@Bambam_CustomZ]

Can I have all the parts names & sizes and links for the kit, think I'm gonna get this for my 6.0l

[@richardholdener1727]

I DON'T HAVE THAT INFO-CHECK WITH VORTECH

[@waynewalleye8458]

SPOKE TOO SOON, I THOUGHT THE FIRST NUMBERS WERE BOOSTED

[@jessetaylor6386]

Damn my 4l60e wont last one weekend with that kind of power 😂

[@proficientbeezy]

Won't last an hour after install lmao

[@shadowopsairman1583]

4L60=6000 lb gvwr. 360 ft lb torque stock. 4L65=6500 gvwr 380 ft lb tq stock. Just have it built to support a 9000 gvwr vehicle.

[@saabbo1958]

Great video! I'm wondering how the flow numbers compared , if you have them, between the TF 205's and the ported 234's? Also, relative static CR between the two combinations?

[@brentspence3379]

Excellent

[@icsamerica]

So there's no replacement for displacement. I'd really like to see a comparo of old trucks VS new truck. 406 with AFR heads VS 6.0 LQ94with AFR heads and good intakes.

[@pizzandoughnutspage7817]

John Rock Hey John they did this test way back: Chevy Small Block Dyno Tests - Old School Meets New It was a good read, the hp and torque were the same. But of course there was complaining that the gen I was to radical for the street, this is always the most ridiculous thing (hot rodders say). They need to drive a Prius instead!