I think he was refering to the 172 jets in the front and back. I stepped down to 164's right now but I'll go back and work my way down to see the difference. I'm suppost to call him once I have the info.

Ok, so I went today to a big buck bash for Top dragster to see If I could do some testing, Long story short, We enter the shoot out. Didn't want to mess with the tune up for a $8000.00 race. DA= 4400' ..88 degrees, track temp 120, Humidity 32%. The car falls off .12 from last week (DA= 3800') but the thing that blew me away is the 2.5 MPH drop. Since the beginning of the year our MPH has been dropping but the ET has been "relatively" constant. We started out at just under 171MPH and today we were 167.8 to 168.2 with a small head wind (5-7 MPH). Went 4 rounds at 7.85 only to break in the staging lanes for 5th round (sheered the teeth off the flywheel). We won $1,200.00 but now I'm wondering if I should send in the converter. The MPH we are running seems low. :?

I think now your a little rich. If you want the MPH back lean it back down, but then your not going to be as consistant. Your car will run more consistant rich and will run faster lean, your choice. You went up 8 sizes split the diff and try 168, maybe you can have both.JMO