easiest eay to 500 rwhp Ls?

[Fitz]

Originally Posted by class01

6.2l with heads and cam might be close

He said "at the rear wheels". A 6.2 with just heads and a cam won't get there. A supercharged LSA won't get there. The beast in the picture would but now he's got to find the $45,000.00 it'll take to get the UPS guy to drop one in his driveway. Any sentence with "500 horsepower at the rear wheels" and "cheap" possesses all of the essential elements of an oxymoron

[Heavymetl]

Originally Posted by Fitz

He said "at the rear wheels". A 6.2 with just heads and a cam won't get there. A supercharged LSA won't get there. The beast in the picture would but now he's got to find the $45,000.00 it'll take to get the UPS guy to drop one in his driveway. Any sentence with "500 horsepower at the rear wheels" and "cheap" possesses all of the essential elements of an oxymoron

Incorrect.

"Cam only" LS3's have been putting down 500rwhp now for quite a while. It's a 376" engine. Cam only is somewhate subjective, but that generally means stock cylinder heads and bottom end, with all the nice supporting bolt ons. Headers, underdrive, etc. The stock LS3 intake is outstanding on does not need changed. However, LS3's aren't cheap.



As for the junkyard turbo route, there are considerations in engine differences. The garden variety, Gen III LM7 has the older style rods in them. Good for ~600rwhp safely. And from what I've seen, they bend rather than break. The 05+ engines have the improved GEN IV floating rods and are considerably stronger. Several stock bottom L33's (aluminum H.O. 5.3) and later 4.8's have been pushed to 900 rwhp before failure. Impressive.

I wouldn't change the rod bolts. They fail primarily with RPM, and any 01+ LS is good to 6500 with stock parts. As said before, the later GEN IV style engines can spin even higher.

When it comes to turbo builds, spend your money on the following:
- Turbo
- Fuel system
- Tune
- Trans
- Converter

If you spent your money carefully and did all the fabrication yourself, you have 500rwhp for less than $5,000.

[Fitz]

Originally Posted by Heavymetl

Incorrect.

"Cam only" LS3's have been putting down 500rwhp now for quite a while.

Keep on smoking that rope! Cam only LS3's are available from several sources (you aren't one of those) BUT that's 525 HP at the flywheel, not the rear wheels.

An LSA is a supercharged 376 and gets 550 at the FLYWHEEL. Still not there.

You won't get there with 5K either.

[IIGW]

Originally Posted by 68shortwide

Plan on buying a 6.0,

no need. 4.8/5.3 is all you need and their cheaper than a 6.0

Originally Posted by Fitz

Keep on smokin' that rope....

great informative reply. You obviously have no clue anything about LS motors.

Originally Posted by Lee H

The combo you desire is about 15k,

not anywhere near that, much much less

Originally Posted by Heavymetl

stock-cammed 4.8/5.3 on boost will do it all day long with ease.

this this this this this this this this this this this this this this this
4.8/5.3, stock everything, except add ARP rod bolts. Then boost away. There are plenty of how-tos and videos and the major car mags showing this exact thing done.
A junk yard 5.3 is about $400. Cheap enough if you blow it up at around 1100hp, you just go get another junk yard motor. It’s too easy.

[Fitz]

Originally Posted by IIGW

great informative reply. You obviously have no clue anything about LS motors.

Actually, I do. Here's my LS powered Mazda Miata. The motor started out as an LS2. Ported L92 heads, ls2 hot cam. new lifters and rockers and the intake to match the heads. Dyno tested at Beck Racing in Phoenix after I finished the engine build yielded 485 HP at the flywheel. A second cam change, new tune profile to match the cam by John Spears raised that to 535 HP at the flywheel.

let's see your work. Post it up. Then I might not laugh at you.

[68shortwide]

Well besides all the motor info, apparently I learned how to start a giant argument lol just mention horsepower and the wolves attack lol sorry for unknowingly instigating this guys. Thanks for the info regardless

[67 chevelle]

Originally Posted by Fitz

Actually, I do. Here's my LS powered Mazda Miata. The motor started out as an LS2. Ported L92 heads, ls2 hot cam. new lifters and rockers and the intake to match the heads. Dyno tested at Beck Racing in Phoenix after I finished the engine build yielded 485 HP at the flywheel. A second cam change, new tune profile to match the cam by John Spears raised that to 535 HP at the flywheel.

let's see your work. Post it up. Then I might not laugh at you.

love it , Fitz what valve covers do you have

[Fitz]

Originally Posted by 67 chevelle

love it , Fitz what valve covers do you have

Those aren't valve covers. They are Edelbrock cast aluminum LS engine coil covers with the Edelbrock name ground off and polished out.

[Custom 68]

I did mine with a T70 turbo. Junkyard 5.3, I am running a T56 so that probably gets me a bit more at the wheels.
Will it last forever? probably not but they sure are strong. I started stock, needed more so swapped a used cam a year later, then nitrous only a 75 shot but that sure woke it up. Then I found a used turbo got some piping and started fabing. After the new power I trashed my converter in my 4l60 so I stuck the T56 with a big clutch and run it. With the small turbo it has tons of torque everywhere. I really did mine pretty cheap by comparison. but I did mine in stages so the $ don't hurt all at once. These motors are everywhere and seem to like boost and cams.
fortunately this is my hobby so if it is down for a bit I can deal with that.

[68shortwide]

i think im gonna find a 6.0, put L92 heads and an aftermarket intake on it and see what i get. if its not near what i want, i can always buy a cheap 5.3 and use the 6.0 in the camaro

[RManson]

Here are two realworld examples for you that we just wrapped up:

LS327
Trickflow heads
Comp Cam and related components
Torq Storm supercharger (8lbs boost)
GM DBW throttle body
Holley Mid-Rise Intake
Made 530hp to the rear wheels on Westech's dyno.

4.8L LS Stroker (383)
Eagle rotating assembly
Mahle forged pistons
Comp Cam and related components
FAST LSx 92mm intake manifold w/ Big Mouth throttle body
RHS heads
Made 551hp at the crank on Superior Automotive's dyno.

Both of these builds have been/are currently being covered in either Custom Classic Trucks or Classic Trucks magazine so you can find more info on their related websites.

Anyways, figured I'd through some real numbers into the conversation. Good luck with whatever you do, but I think you'll like the LS option regardless!

[67 chevelle]

19244099 + a quality Manuel transmission will do it , lsx 454 might be cheaper

[Lees68GMC]

I'm confused, I've regularly seen, (GTOs, Corvettes, SSRs) first-hand on dynos, 600+ normally aspirated (No Turbo, No S/C or Nitrous) You guys aren't talking about Fords are you? Heck the Real Experts on LS HP is Holden down in Australia they've been doing it for decades (yes, I realize the LS came to America in 97) Check out Australian V8 Supercars for fun. You don't have to have a Pratt-Miller GM race car, or a Katech engine to get the 500 RWHP he's asking about. Here's a few done in the home garage, however the "Easiest" isn't necessarily the "Cheapest" though.

[brad_man_72]

Check out leroy brown, has had several junkyard ls engines and chineese turbos. Runs 9s npw headed to the 8s with most recent build.
Making big power is easy with an ls engine and can be cheap. Unfortunatly most drivetrains won't last and there's not many cheap transmissions so spending money on the trans and rear end will happen when you start making power. 4l80e with transgo stage 2 kit seems to be a pretty hot ticket for OD price and relaibility. Head over to sloppy mechanics.
Ls engines can handle a lot of boost, don't get greedy with timing.

[MARKDTN]

Originally Posted by brad_man_72

Check out leroy brown, has had several junkyard ls engines and chineese turbos. Runs 9s npw headed to the 8s with most recent build.
Making big power is easy with an ls engine and can be cheap. Unfortunatly most drivetrains won't last and there's not many cheap transmissions so spending money on the trans and rear end will happen when you start making power. 4l80e with transgo stage 2 kit seems to be a pretty hot ticket for OD price and relaibility. Head over to sloppy mechanics.
Ls engines can handle a lot of boost, don't get greedy with timing.

Neat stuff.

http://www.dragzine.com/features/car...pump-gas-nova/
This car belongs to a friend of mine. Since the article was written he has dipped into the 8s. This is through a TH400 and on drag radials. No slicks, no tub. And he drives the car to the strip about 100 miles round trip. LS is the way to go for big power.

[Exgie]

With enough money and boost you can do anything

3.6 liter 1300 hp 911!

https://www.youtube.com/watch?featur...&v=fu4IE7htoSU

[Turbo1dr]

I have had a 580 rear wheel horsepower Buick V6. It had a stock crank, stock rods, ported stock heads and a ported stock intake manifold. The focus on so much power is a lot of boost forcing through all of the stock stuff along with A LOT of fuel. If you have horses in the stable...you have to feed them!

For this reason, I'd have to say go with a bone stock 4.8, add a 76mm turbo, a intercooler and upgraded fuel system to keep up with 84lb injectors with a tune. With 93 octane and 14psi of boost, it should get you to your goal.

[bpatrol]

6.0 with l92 heads. I would do a ls3 intake. I remember you were trying to be efficient with your cash?
If so a regular f body or vette or even a truck front acc drive will work just fine without the big money. look for a ly6 motor it will come with the heads you want and its up to you to either keep the vvt or remove it. I built a ly6 for my 67 Camaro kept the vvt and ran a texas speed vvt-2 cam with mild port work and exhaust and a good tune. got me 455 at the wheels with a 6 speed and runs live a daily driver and it was plenty fast. I am currently building a 5.7 with a fast ez efi mild cam shoul d be around 375 when its all done.
good luck and don't worry about the final number too much.
375 plus horsepower in a truck is no joke fun

Don't worry about the know it all's you get sometimes here
Some really are trying to help but cannot help coming off as jerky

[68shortwide]

i mean what i would like most is a 6.2 from a gto or escalade but when they do come up theyre not cheap, 6.0 blocks are everywhere.

[hamjet]

Easy guys,

[68shortwide]

Fitz knows this, i have a profound hatred for '00 and older miatas. but i like the idea of this.

[308]

Get an LS3 and throw a cam in it. Or just settle for 400-420ish unless you want to spend money.
I have a 2005 C6 and I tried to get 500+ out of the stock 243 heads and intake but never happened. Ended up building a 408 and has prefect street manners making 570rwhp on motor before spray.