Drag Racing Discussions > Front Engine Dragsters

Rear Tire selection

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dusterdave173:
I had a paint scheme done by great local designer--but when I priced materials I almost had a stroke-had name lettered on cowl and that is it! That is my first tin bending so cowl is not as slick as Calif cars from back in the day but hey...did it all myself.

codysisson:
Nice looking car Dave!!

I have some more data from the race this weekend. I ran 5 times, the first 4 laps were 8.21 - 8.27 @ 161-162 MPH. 31" Hoosires, 9.25 ponds of air, 8200 RPM through the lights.

I went out in second round but was able to take one last test run so I put on my 33" Mickey Thompson tires. I went out 30 minutes after my last run , the track temp was 110 degrees both runs. 9 .25 pounds of air pressure. The fourth run I ran 8.244 @ 162.18, the fifth run with the M/T's I ran: 8.249 @ 161.63, 8100 through the lights. 60' time was .014 slower with the M/T's but they launched hard.

I learned  a whole lot with all those runs. I am very happy the car is so consistent. I hope this isn't too much information but since I started the conversation and received a lot of great advice and information from all of you, I wanted to share what I found out.

I still need to pick up 2 tenths because we have a great 8.0 program here.   So I am going to drop my gears from 4:57 to 4:11 to get the RPM in the correct power band of the engine and hopefully pic up a tiny bit there.

masracingtd1167:
Cody I have a 4.30 ring and pinion that you could try ! Nice job on your runs !Bill

wideopen231:
Cody,

  Question why do you feel going to higher gear will pick you up?Don't take it wrong just seems odd unless you have reason to believe its to much and calming it down will make quicker. I have done just that.Spent 3 years(match race 1 time per) trying to run a 3 second 1/8 at local track.The year I said screw it and dropped blower ,pulled some clutch and added little fuel.Bam 3.98@183,first 3 second run on that track.
What is low in trans? What converter stall?

codysisson:
1:76 trans gear, 5700 stall

I dynoed the engine and it starts to fall off around 7200. I am going through the lights @ 8200 and it is falling off before the lights. My thoughts were to get the rpm down closer to the max power curve. Does that make sense or am I not thinking correctly?

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