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Old 01-10-2006, 10:05 AM   #3
ride5000
Scooby Guru
 
Member#: 32792
Join Date: Feb 2003
Chapter/Region: NESIC
Location: lincoln, ri
Vehicle:
2003 GGA MBP
12.9 / 105+

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also, if you're squirting alchy/water, you will need to lean it out and possibly need to advance timing to really take advantage of it. think 12.5:1 range.

however, if you're just using the ADI as a "safety blanket" then disregard.

i agree with rac in that timing generally needs to be more advanced as the rpms go past torque peak. this is partly because the piston speeds/crank angular velocities are literally faster and there needs to be more "lead time" for the spark to cause peak combustion pressure at the optimal 15* or so ATDC. in addition there's the effects of lower VE that he spoke of to overcome as well.
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