car slowed down....help

[Gn-ing]

I had blue tops and a 108 red's chip...was running 12:40's@110 with 22lbs boost...changed to 009's and red's 107 chip At 24lbs boost....with all else in my sig....slowed down to 12:60 at 108...Red's said this would be an 11 sec combo....what's wrong...I used 112 octaine,no knock retard...seemed to have less power in 3rd....1.79 60's.....can anyone explain it?

 

[Gn-ing]

forgot to say...fuel pressure is set at 44lbs.....

 

[XLR8]

What were the O2 readings - too rich or lean? How does the 1/8th mph and et compare? Was the 60' similar? Were the track conditions - i.e. temp, barometer and humidity the same or close? Did your car always run 12.4 @ 110 or was that a best ever and you usually ran a couple of 1/10ths and mph slower? (I know I do). What is the timing of the new and old chip? Does the new chip pull timing in 3rd gear? Just giving you a few things to think about. I think any time that you change ANYTHING, it takes time to dial your car in.

 

[Bobs rare 6]

You will have to turn up the boost! The 107 chip has like 20 deg. timing. The 108 is a high timing chip.

 

[Gn-ing]

Originally posted by Bobs rare 6
You will have to turn up the boost! The 107 chip has like 20 deg. timing. The 108 is a high timing chip.

How much boost? 26 28? how far will it go on 112 octaine?

 

[Bobs rare 6]

Get more octane! Like v.p. c-16. I used to run reds 107 and 106 chips with a combo like yours. Stock long block,ta-60, m.j. 17 row, 009s, ac 3400n\l conv. I ran 11.51\116 with 29# boost with 106 chip. Ran 11.67 with 107 and 27# boost. Be sure and keep o2 volts between 800-820 when running high boost. I was running 60# static f.p. to get those o2 volts. Bob.