Overboost
03-25-2007, 12:50 PM
just a thought.
I had a TT race chip for 104 octane and 24 psi installed. with 98 octane and 19 PSI I was getting 14 degrees of spark retard and knock to no end.
I put in my street chip from an unknown maker (came with car, unmarked) and 92 octane fuel and 19PSI I was getting 3 degrees of retard? the timing in the race chip is 24 and street is 20
why is my street chip performing better than my race chip? I am not sure if it is the octane requirements of each but the timing is only 4 degrees apart and boost was the same.
also the street chip is for a TH 400 trans so no lockup unless I do it manually with the switch. and street chip had a slight hessitation/miss off idle every now and then, not all the time. everything else was the same. again, just an observatoin.
I had a TT race chip for 104 octane and 24 psi installed. with 98 octane and 19 PSI I was getting 14 degrees of spark retard and knock to no end.
I put in my street chip from an unknown maker (came with car, unmarked) and 92 octane fuel and 19PSI I was getting 3 degrees of retard? the timing in the race chip is 24 and street is 20
why is my street chip performing better than my race chip? I am not sure if it is the octane requirements of each but the timing is only 4 degrees apart and boost was the same.
also the street chip is for a TH 400 trans so no lockup unless I do it manually with the switch. and street chip had a slight hessitation/miss off idle every now and then, not all the time. everything else was the same. again, just an observatoin.