Well went to the track again today, as some of you may remember last time at the track I pulled back to back 11.8's@116 with 1.65 60fts. Well went to the track today and my first 2 runs were 11.9's @112.8 and 113.9 with 1.63 and 1.67 60fts. My driving seem to be just as good but i dropped almost 3mph on my trap. I ran maybe 4 more time's getting worse each time, as bad as 12.3@109 .
I dont understand what is happening, I tried 3 different types of spark plugs throughout the day br8es, bpr8es and bpr7es and none seemed to help, Could not seem to find any boost leaks and my 1/8 miles were the same as my previous 116 traps. Car seems to pull a little less up top. Wheather was about 15 degree's warmer today, could that make a 3mph difference?

 

no one has any opinions?

 

Did you log your timing?

 

don't have a data logger, need to get one

 

Were you using the same gas as last time?

 

I would have to think 15 degrees would affect your time. It is very little of a diff. but try running on a day that is 30 degrees colder and maybe you might gain 3 mph?

 

maybe bad gas.

 

maybe bad gas, I hope that's what it was, but i dosent seem to pull as hard and I have refilled since.

 

It's hard to see what's going on if you don't log and you know that. Until that happens we're just guessing really.

1. Boost leak
2. Knock for some reason if 1/8th mile times and mph are the same you're car is pulling timing for some reason.

Good luck