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Gear ratio and tire selection for heavy turbo car

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Old 08-01-2018, 05:51 PM
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Default Gear ratio and tire selection for heavy turbo car

I know it’s been beaten to death all over the internet, but I’m at a delema here and would like some input.

i have an 8.8 in my t/a, and it currently has 3.73 gears. I however already have a set of 3.08, 3.31, and 3.50 gears also. 3.73 will put me closest to my optimal trap rpm, but I’m worried will fight me for traction, primarily on the street. I have a 3700# ws6 with a trans brake 80e, and twin gt3582’s, with a 28x10.50 et street R currently but also own a set of same size pro bracket radials.

next question, im looking at getting slicks. Probably 28x10.50 Hoosiers. Stiff will
or not? Tube or no tube? Again, primarily street raced.
Old 08-01-2018, 06:05 PM
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I went with a 3.50 gear and a 295/50/16, but a 6 speed car that was 3800. Worked well.
Old 08-01-2018, 06:33 PM
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I have a shorter tire than you, I’m leaning towards the 3.50 as well.
Old 08-01-2018, 07:06 PM
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I run 28x10.5 stiffwall hoosiers. No tubes. Put screws in IF they spin. I love them. They dead hook on a poorly prepped track. I also use 3.50 gears. I'm a bit lighter though at 3550
Old 08-01-2018, 08:18 PM
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I'm also 295/55r15 with 3.55s, for me it seems perfect.
Old 08-01-2018, 09:00 PM
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I’d really like to go to a bigger tire but I can’t if I wanna try and do any of the small tire stuff
Old 08-01-2018, 09:37 PM
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what rpm will you be shifting
Old 08-01-2018, 09:56 PM
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Not sure yet, whatever is optimum which I’ll find out in a few weeks on the dyno. Thinking around 6700



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