01SOMZ28

iTrader: (37)

I'm not an expert with forced induction, most of my time has been spent running nitrous over the years. I'm getting the itch to run some boost now. My car is a stock bottom end H/C LS1 which is right at 10.9-11.0:1 compression. Is that to high of compression for boost? It currently makes 410/393 and i'd like to be around 500-525hp on boost. Any input is much appreciated.

BADMOON

I would say on a stock bottom end car 6 pounds would last maybe with some meth for security.. What heads do you have that make your compression 11:1?

adamantium

iTrader: (3)

E85 or methanol, be conservative on the timing i don't see why it wouldn't hold.

01SOMZ28

iTrader: (37)

They're PRC stage 2.5 5.3 heads with 61cc chambers.

adamantium

iTrader: (3)

Pounds of boost is irrelevant, power output is what matters. Seen Honda (open deck motors) run 12.5:1 compression on 10psi (forged internals of course). but it held till he pulled the pistons for something lower. He's running 10:1 right now.

01SOMZ28

iTrader: (37)

E85 is very limited around here, so i don't plan on making the switch over.

01SOMZ28

iTrader: (37)

My cam is also 228/235 .614/.621 111lsa

Nitrous spec'd, alright for boost?

Nitroused383

iTrader: (10)

11:1 is what I run, 130k mile stock bottom end LS1. H/C/I + 76mm turbo, normally run around 8lbs of boost on 92 + 100% meth injection, but have ran up to 11-15lbs with av gas. Kind of a non-winter daily driver, put 5k miles on the turbo setup and beat the **** out of all the time. It's not ideal but I didn't want to get rid of my current heads. I will throw a 5.3 in it when it blows.

01SOMZ28

iTrader: (37)

You and i think alike. I just put these heads on a few months ago and i don't want to get rid of them. And when or if i go boosted, i'll throw in a 5.3 when the LS1 blows. My bottom end has 91k right now and i had been spraying the **** out of it since it had 55k.

a4ls2goat

Sell the ls1, get a 5.3 with arp hardware, ls9 headgaskets etc, and you'll still have money for another 5.3 back up.

smokinHawk

iTrader: (48)

https://ls1tech.com/forums/forced-in...turbo-faq.html