High boost low compression guys.. answer this survey
Thread Starter
TECH Apprentice
Joined: Apr 2002
Posts: 308
Likes: 0
From: Austin, TX
High boost low compression guys.. answer this survey I'm getting ready to drop in a new motor (with forged boost pistons and all the other goodies) and turn up the boost. I wanted to see what type of tune most of you high boost guys are running. Please respond with whatever info you can provide. I'm specifically looking for what type of timing and A/F you are running. Please include race vs pump gas info if you have it.
I know there is no magic #s, but I was hoping that this might reveal some general trends.
CI:
Chamber volume(cc's):
Piston dish(cc's):
Static compression:
FI method/compressor size:
Max psi:
Redline:
A/F at peak TQ:
Timing at peak TQ:
A/F at redline:
Timing at redline:
Injector size used:
Fuel used:
Max HP: @x rpm @x psi
Max TQ: @x rpm @x psi
I know there is no magic #s, but I was hoping that this might reveal some general trends.
CI:
Chamber volume(cc's):
Piston dish(cc's):
Static compression:
FI method/compressor size:
Max psi:
Redline:
A/F at peak TQ:
Timing at peak TQ:
A/F at redline:
Timing at redline:
Injector size used:
Fuel used:
Max HP: @x rpm @x psi
Max TQ: @x rpm @x psi
CI: 348ci, LS6 block, 6.0 heads
Chamber volume(cc's): 69cc
Piston dish(cc's): -8.6cc
Static compression: 9.1:1
FI method/compressor size: Vortech YS Trim
Max psi: 17psi on my car, but the unit will do 27psi
Redline: 7200
A/F at peak TQ:
Timing at peak TQ:
A/F at redline: 11:1
Timing at redline: 23
Injector size used: 83 Siemens, base fuel pressure is 43psi
Fuel used: VP C12 + 93 octane (approx 5 gal C12, 3 gallons 93)
Max HP: 719.5@6700 rpm @17 psi
Max TQ: 700 @ x rpm (hard to measure without locking the converter but it was 700)
Chamber volume(cc's): 69cc
Piston dish(cc's): -8.6cc
Static compression: 9.1:1
FI method/compressor size: Vortech YS Trim
Max psi: 17psi on my car, but the unit will do 27psi
Redline: 7200
A/F at peak TQ:
Timing at peak TQ:
A/F at redline: 11:1
Timing at redline: 23
Injector size used: 83 Siemens, base fuel pressure is 43psi
Fuel used: VP C12 + 93 octane (approx 5 gal C12, 3 gallons 93)
Max HP: 719.5@6700 rpm @17 psi
Max TQ: 700 @ x rpm (hard to measure without locking the converter but it was 700)
