LSGunZ28

iTrader: (8)

with a mild cam and head package, with streetable compression ( 91 octane) can I make 500+ WHP with no power adders, no NOS, But with larger displacement?

Lets say a 224 or 228 cam, what displacement would get me 500 WHP?

would a 402 LS2 get me there? what about a 4" stroke L92?

Dr. Jeckel

iTrader: (12)

Larger displacement means a big cam for a 346 becomes a mild cam for a 402. The 224 or 228 would be a BABY cam for a 402 and really not worth it.
500NA rwhp outta a 402 is pretty easy, but will require a cam like the Texas Giant from TSP or comparable.
If your wanting really streetable then go forced induction on your 346, same or better hp with better street manners and can still be run on 91 octane.

TryingT/A

iTrader: (5)

no mild h/c will do that. Termin8er got 497 or something with an extreme h/c package from TSP but he also had some bolt ons and mainly drag races. Try an ati procharger at 7Psi for stock internals, that should do it, but will cost alot more than a H/c package.

LSGunZ28

iTrader: (8)

the thing is, I dont wanna go FI... Not yet at least.


So you are telling me a big cam for 346 would be a mild cam for a 402... However, would this mean I would be able to drive at lower RPMs with that setup? better yet what about an L92 which is 418 ci? what about a T-rex or Texas Giant on that displacement?

Dr. Jeckel

iTrader: (12)

I would do some reading about the different setups people have and what hp they are making, to narrow your questions down a bit. Look in the dyno section also to get a good idea of what people are running and what they are getting outta the different combos.

ZL1Killa

iTrader: (17)

guys.... you do realize that a BIG cam doesn't always yield the most power....

Dr. Jeckel

iTrader: (12)

yeah, but if you compare a 228R to an MS4, the MS4 will make more power everytime given the same modifications.

There are alot of other factors once you start considering things other than just the cam, so yes, certain combinations may make more power with a smaller cam, if the combo with the larger cam is not well matched.

Picking an engine setup is like a big puzzle...I think my puzzle is missing a few pieces

orangeapeel

iTrader: (18)

I run a cam that people consider mild for a 402/408. 244/248 makes lots of power and is a quart low on tq. 421/378 is not where I wanted to be, but at high rpms it is a tire fryer.

LSGunZ28

iTrader: (8)

I just want streetable manners.... Something That will make close to the same power at low RPMs as does my Stock LS1. But Since im going bigger displacement, my increased cubic inches wouldf make up for lost low end torque. So I could run a mild/big cam for a 418... I was thinking smaller than a T rex, but bigger than 224 or 228. maybe a 232 or 238 at most?

orangeapeel

iTrader: (18)

What size are you going to though? CID wise. That will help determine some street manners.

AKRA

It just depends if you are talking flywheel hp or rear wheel hp. I have the Lunati 224 duration - 560 lift 112 lsa with comp cam 1.75 rockers (raising the lift to approx. 574) and my rw hp is 406. That means flywheel hp calculates to about 478 hp. So if you are talking flywheel hp it is possible.

Good luck,

Al

orangeapeel

iTrader: (18)

No one on here talks fwhp.

Ksett

I think you can get there using a 402 with the right setup using a cam around 238 on the intake side. You will need good heads (TFS or ETP) in my opinion with a ported 90/90 and compression (8.5-8.7 DCR). Check around with some of the vendors that are using TFS or ETP heads with their setups. I would also go with a custom grind cam for your setup. Basically you will want to do a lot of research calling different shops and picking their brains.
I wouldn't soley rely on this site for your research.

orangeapeel

iTrader: (18)

238 is almost stock in a 402.

Gannet

1.2 rwhp/ci is pretty readily attainable on a very streetable setup. That's 414 rwhp on a 346, 482 on a 402, and 502 on a 418. So yes, what you want is very doable. It will require very good heads, intake, and exhaust more than a big cam. A 418 is 20% bigger than a 346 so, all else being equal, you need 20% more airflow capacity from the intake, heads, and exhaust to make the same specific horsepower. People say "run a big cam on a big motor" and yeah, you can do that, but I think a lot of times on a smallblock like an LS1 that's more a crutch to get around inadequate airflow capacity. There's still only 360 degrees in a circle, even on a 447.

I second the suggestion that when it gets time to lay down the coin, talk to some top-rep shops that have proven experience with these deals. Consider buying a package of parts or even a longblock from one of them.

LSGunZ28

iTrader: (8)

well not anytime soon, but in half a year, maybe more... 402 - 418 ci... LS2 stroked or L92.

LSGunZ28

iTrader: (8)

Thanks guys... I think a 238 would be good for this setup. planty of displacenet and not too much low end HP loss, but great High end power as well.... about 500WHP N/A mosnter

Screamin_Z

iTrader: (2)

just had a guy locally throw down 485 thru a 6sp and the stock catback on his 01 T/A with a iron 408, 23x cam and good set of 6.0 heads w/ ls6 intake....he put down 513 thru this cutout.

also, here is a link for a guy putting down 513rwhp on a stock 346 w/ H/C Z06...but I can garantee he's not running 91 octane
http://www.ls1gto.com/forums/showthread.php?t=122108

miami993c297

iTrader: (6)

Hi Screamin_Z,
As specified in the post #54 of the thread you mention:

"And I refueled the tank with Chevron 93 Octane from the gas station five minutes away from the dyno"

That's the Octane I always used here in Florida from any Chevron gaz station...nothing special.
Christian

Abdullah

iTrader: (2)

which LS1 heads are better the 215cc TFS or the 215cc ETP?

thanks