SBF Dragster fresh engine and trans, same combo as last year, had a diamond front suspension added to the car and a new aluminum body where the old body was carbon so we've added some weight maybe as much as 100lbs with the driver gaining a little too. I've not weighed it yet but will and verify weight difference. Car has slowed .10-.15 and 3-4 mph, which is fine but now the rpm graph looks a lot different the converter is going maybe 50-100 more on the hit (65xx vs 64xx) and then it dips back down into the stall (63xx) after the gear change. Car was pretty good in the 60 after we made a few passes but the 330 was moving around. I noticed that on the gear change the trans pressure (sensor at the servo) is dropping a bunch (23x-18x) and it didn't do that last year. I have a graph from one of the passes this past weekend and one from last year. What would cause the pressure to drop? Pump, Converter, valve body? Is the pressure drop causing drop into the stall?

Appreciate the help.

not enough oil in pan

It was a little low, quart maybe a little more

I will be interested to see if after you get the pressure fixed if the dip in engine RPM in the middle of 1st gear goes back to the way it was last year. (much smaller dip)

Stan

i have seen a quart or more cause pressure issues,i hope it works for this one

Car is still in the trailer so haven't been able to verify yet. It might be more like 1.5 to 2 low, we were in a hurry to get everything finished up for first weekend and I don't think we got all the fluid that we thought we did put in, so hopefully that is the issue, I'll update after this weekend.

Thanks