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> what I see.
awd4kicks
post Feb 26 2004, 01:43 PM
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From: Washburn
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The only thing that makes me think the 190LPH fuel pump is not inadequate is the fact that I was able to run staright 112 octane and take knock entirely out of the picture. (Note this is down from 30-40 counts in 3-4th gears). To me that means the compressed intake charge from the turbo is running hot enough that better detonation inhibiting properties some where before the combustion chamber are required.

Obviously you can add a bigger fuel pump and throw more gas per power stroke, but in my opinion that is too rich of a mixture for speed. Other alternatives are a bigger more efficient turbo, higher octane fuel, large front mount intercooler, propane or water injection, etc. Anti-detonation fixes such as High octane fuel and water injection do slow the combustion burn to deter detonation, but I don't feel that either of these slow acceleration down nearly as much as a fuel mixture that is too rich. An overly rich mixture is always slower regardless if you are cutting down detonation...Nate and I have both seen this. Not to say Phat fuel levels aren't safer, but that wasn't what this discussion was about.

BTW - I was running stock injectors and a non-turbo FPR with my 14b on the fastest runs made at 24psi, but it was with the 112 octane gas.


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