thendawg

I think Ive pretty much got everything figured out, just want some confirmation that Im headed in the right direction...

First off, the short block will be an LS2 with 4.005 or 4.010 pistons depending on how much I need to take off the walls - TSP 402 stroker kit with Wiseco pistons.

So with that said -

1) Standard L92 heads will still work, although they are designed for a 4.030 bore, correct?

2) An L92/LS3 head gasket should be used, correct?

3) Finally, the one Im unsure on, will the LS2 DBW throttle body bolt up to the stock LS3 intake mani?

The goal is to have a motor with around 10.8-11:1 CR and break 500whp through an M6. I plan on having Martin at Tick spec a cam for it, its not a dd so not too concerned about driveability.

Down the road I plan on going turbo (Of course I plan on swapping cams) however with E85, Im thinking the 11:1 CR shouldnt be a problem.

Thanks in advance for your help guys!

WKMCD

iTrader: (2)

Excellent build thread in my sig that will answer almost everyone of your questions...

briancb1

Since your compression isn't that high...depending how far the pistons come out of the hole, I'd run the thinnest head gaskets I could get away with. Shoot for .035" for piston quench.

Cometic gaskets can make you what you need.

thendawg

Thanks! Reading through your thread now, lots of valueable info, looks like your original setup is exactly what Im looking at.

thendawg

I may end up going closer to a 12:1, I know some people have ran into an issue with knock and loosing power from the extra comp, but I plan on running E85 even with it N/A so that shouldnt be an issue. It may be quite awhile before I can boost it so i want to get everything I can out of it N/A. Any idea how low you can mill down L92's? Id like to make most the comp bump in the head so I could simply swap heads down the road to drop the cr back down.

briancb1

.030" isn't an issue, done all the time. That combined with thin gaskets can net you a pretty good bump in compression.

I run 12:1 on 93 and have no penalties. I know this because I tested out 100 octane once on the dyno and I didn't pick up any power over 93.

thendawg

Yeah, unfortunately 93 is hard to come by in Oklahoma, we mainly have 91 unless you go to a specialty station, and there its 4.50-5.00/gal. Ive always been a big E85 fan (mainly been a turbo 4cyl guy until I got into the LS world with my GTO) so Id like to see how it does in an N/A combo. Ive heard of some people picking up 10-15 hp/tq, and Im already building the fuel system to support 800-1000whp on E85 when I go turbo a long ways down the road, so why not? lol

Sales@Tick

iTrader: (3)

As long as your dynamic compression ratio is kept in the 8.4-8.6:1 range with the camshaft I specify, you can run 91 octane all day long regardless of what the static compression is.

I will work with you in this regard to make sure you can accomplish this aspect for a trouble free tune-up and combination.

With where you live, the quench your motor will have and the cam timing events the camshaft profile will have I don't see any issue with 11.4-11.6:1 static compression.

(SS)

iTrader: (1)

https://sdparts.com/details/scoggin-...enter/sd5881-1

I've been thinking about getting these with a ls3 intake and new cam.You might want to look into these as well . I'm also going to be picking martins brain for a cam that will complimate these.

lil john

big port for 402~408 try looking for a program in the 265 270 cc range AI. WCCH. or Mr. Morgan as I did. Martin did me a soft solid roller nothing less than 700hp with 408 and ls3 heads.

thendawg

Thanks Martin, hope to be giving you a call soon to get this all spec'd out. Looks like it should be coming together here in the next month or two, then I may finally get to drive my car again! Like I said, Im not too concerned about keeping the comp low, Id really like to try E85 N/A anyways since its so easy to find around here

Sales@Tick

iTrader: (3)

13:1 it is then!

LSFOX

iTrader: (1)

I don't see any reason you can't make 550 at the wheels with that bottom end in a M6 car.

I'm running L92's on a Stock LQ9 bottom end with LS3 intake and 90MM TB.

ZERO port work on heads or intake

I'm making 448 thru an auto..

More cubes and the right cam I see 550 in your future with ease on pump gas....

https://ls1tech.com/forums/dynamomet...o-results.html