Blown Interceptor

iTrader: (5)

After the new fuel pump and finally scanned my car for timing. I just tested it out w/125 shot. Detonation when I first spraying. My timing is around 27*, then is starts to drop, maybe it will go as low as 21.5-23,but all in all it stays around 24-27*.


What does everyone think? Could I be running too much timing?

**If anyone has EFIlive, I could email them the file, and get some thoughts on maybe whats going on.**

Thanks for the feedback!

Jason

Formula_Power

iTrader: (18)

what octane fuel are you using...if your only using 93....i would upgrade to at least 100 and see if it gets better...if you are detonating it can only be a few things.....to much advace timing.....too low octane fuel.......and of course no fuel at all....is all your fuel pressure readings look good??.....also you maybe want to back down to a 75 shot and test it

Blown Interceptor

iTrader: (5)

The only octane we have here in Ca is 91. If I drop down to a 75 shot...and the detonation goes away, would it be a timing issue?

Thanks,

Robert56

iTrader: (2)

Try upping your fuel jet a size at a time, every combo is different. Also, engine temp plays a role, try setting fans down if you haven't allready. On wet hits you usually see a lean spike upon activation, the n2o gets to the cylinder first then the gas, does it go away right after intial hit?

Blown Interceptor

iTrader: (5)

I have a manual fan switch, so cooling the engine is ok. It will go away right after I first start spraying, usually within a couple hundred rpm's, like 500-700.

Thanks for the imput...

Green Thunder

iTrader: (11)

What plugs are you running?

Blown Interceptor

iTrader: (5)

Autolite 103