f1ctionZ28

i want to know if i can get away with boosting a stock bottom end LS1 with milled 243 heads. the heads have been milled .030" and compression should be about 11-1. I know that i would have to get better injectors, but i just want to know if im asking for trouble with higher compression. if so, how much boost do you think? the car has about 143000 miles btw lol but its runs fine

Blownz28man

iTrader: (2)

Yea you can. Just read a post of a guy almost making 590HP and a 100K Mi+ ls1. Lil meth and a good tune..

Fbodyjunkie06

iTrader: (10)

Sounds just like Nitroused383's car, send him a pm, he can let you know the scoop.

forgedlt4

i have a lt1, and i am running 11.3:1 compression with 7-8 lbs on E85. no issues so far.

HydroStream6

iTrader: (16)

E85 will help a TON if you can run it.

narx66gmc

meth should help with the higher comp for sure. and get a really good tuner to help... but, there is alot more that goes into that question than what you have asked...

Nitroused383

iTrader: (10)

I've put about 5000 miles on my boosted setup so far. My car has almost 130,000 miles on it now. I made 444 rwhp / 415 tq before the turbo. My 243's have a little valve job work I did and milled .020" to get 11:1 or 62cc. .030" mill job will be around 60.5cc which is 11.2:1. I literally made 100's of pulls on this thing I'm not easy on it at all, I've gone through 7 gallons of meth just this summer The key is a good tune and 100% meth injection. I made 580rwhp with a tc76 on 7lbs and I've been running a 76gts now on 8lbs for the last 1000 miles or so. If you're not very familiar with tuning I suggest you get a set of 317 heads. I have done a few 3rd gear pulls that hit 16lbs of boost on accident, after I looked at the log I can't believe it's still alive. But my tune is setup to add a **** load of fuel above 8lbs of boost and pull quite a bit of timing, so I was only around 5 degrees of timing on 16lbs. I've tuned a few boosted ls cars so I've learned a few tricks along the way.

crashly

what cam ?
maybe get a 'real' cam, and bleed off abit of cylinder pressure.
think bigger...
:p

lmt0705

iTrader: (7)

i wiped out a couple ringlands at 460 rwhp on my first fi motor, the tune is important but the pistons can only physically handle so much stress before they give. in my opinion your on borrowed time and should be prepared for the worst when it happens

skinnies

iTrader: (33)

If you hurt ringlands at 460rwhp that was tune related.

lmt0705

iTrader: (7)

My afrs never even came close to 11 under full throttle, people break there pistons with na stock motors.