lookin for more torque based setup
Jan 19, 2009 | 10:38 PM
#31
What octane you will need depends on DCR not SCR. People go well over 11:1 and run just fine on 93. 9:1 DCR is regarded as the point when you'll need to switch over to race gas. So you'll need to the valve timing specs on your cam and then you can calculate your DCR based on what combustion chamber size you choose.
pappydan - i have 44lb/hr injectors and a stock pump with a returnless fuel system. my fuel pressure guage stays at about 58psi even at WOT. i do plan to upgrade the fuel pump, but it isnt top priority, cuz i only get to the track once in a great while. and even though i have a lead foot i dont get too many WOT passes on the street. but do know there is risk there.
Jan 19, 2009 | 11:06 PM
#33
TECH Veteran
Joined: Sep 2003
Posts: 4,534
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From: Las Vegas, NV
I've setup alot of Gen II's and Gen III's with well over 11:1 compression with good tuning on 93 octane fuel. Cam choice is a big deal as is how you get the compression ratio. People run LS2's with boost all the time as an example on pump gas. That's 10.9:1 compression with 7-10psi of boost for strong applications. Computer technology makes that possible as well as how efficient the gen III engine is setup to be.
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