[quote="happyfast"]
Originally Posted by hammertime
Need to know more about what car its in, weight, trans, rear gear and tire ? and what type of racing do you do?
is 6500 pretty standard with a peak horsepower @seven thousand Rpm? How interesting. the car Iis a Top Sportsman 63 split window tube chassis vet made by Spitzer in 1995, tires are 32 inch paddle tires for sand drags..I am guessing the car weighs about 2600 pounds without me in it I am a hundred sixty pounds.powerglide has standard gears,the rear gear ratio is 410.
I really appreciate the help. I only get to run this car a few times a year and it is not enough time to iron it out by just test and tune.I shift at one and a half seconds which is usually about 6,900 rpm and I finish the 100 yards at 6500 rpm.I am happy with the ET which is 3.6,s but I want to understand the car better.I am assuming that because it is not finishing at a higher rpm that I am wasting some power through the converter ,perhaps could use some lower gearing, but wanted some information from someone with more experience than I have
Honestly the max torque at 5200 looks low rpm's for that motor. The 6200 converter is fine. That's what I use to run with my NA setup. That's higher than you need to launch tough. With paddle tires and as light as you are you can launch a little higher than I can but not that much higher. Also the track you run on makes some difference to that too. However, even when I run paddle tires 3500 to 3800 is still the magic #. If it's sandy much more rpm's and tires go down before they go forward. Don't be scared to try to lower your launch rpm's
BTW You would be a good bit faster by not shifting at all. I run a glide that has 2nd gear taken out completely. I run low gear all the way, but you can't be scared to turn the motor hard. 8,200 to 8,400
is my normal rpm max with 2 kits on. On motor I use to turn 7,600 - 7800.