hayabusa

Without making any modifications what is the largest slick that can fit on the 1980 Firebird? I want to be able to retain the stock setup, at least the stock wheel wells, I dont want to tub it out. So what is the largest slick, width, and height I can fit on a 15 inch rim for this car?
I want the car to remain as stock as possible body wise in case I ever want to return it to its original condition. However I do need to be able to get traction to run consistent times for bracket racing.

Hayabusa

badbird5.7

my brother has a 78 trans am and he runs a 28x12.5 on his car with weld drag stars 15 inch rim and i do believe a 5 inch back spacer with no modifications

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hellbird78

a 5 inch wheel spacer huh wow it must look funny.....it's either 41/4 or 41/2 i still had at least a finger an a half almost 2 which is perfect

hellbird78

are you a bracket racer or stock street??you have to run a certain size slick for different classes for stock street i think its a 10"slick do some research

badbird5.7

i was told by my bro that it was a 5 inch spacer i was just relaying the info. when i see him i'll have to tell him that his 5 inch spacer looks funny

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hayabusa

I race Beat The Heat. I can run any configuration I want. Any size engine, tire, gear, power adder, etc. It is Bracket racing. We have 4 classes. Stock Cop, Mod cop, and Pro cop along with motor cycle. I just want the biggest slick I can run in the stock wheel well. So I will run the widest slick I can fit, and I need to know the tallest wheel so I can decide what gear ratio to go with. Half of the races are 1/8th mile races the other half are quarter mile. So I will need two different heights because I dont want to have to change out the rear end for each race. With the torque I will have I probably wont go with anything steeper than a 4.10. Your time determines what bracket you fit in not what configuration you have so I can optimize it without having to worry about class rules.

Hayabusa

badbird5.7

yeah that's the size he had on his car with no rubbing or clearance issuse, looked pretty mean to

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transamkid

i have 28x10.5x15 on my 80 no problem. ive seen up to 29x11.5x15 on a 78 with no problems, only wheel spacers. i run mine with no spacers or anything, doesnt rub

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-scarpa
1980 TransAm done by OLDSCHOOL at TTPerformance
1994 Firebird v6, auto, good sound system, 160k!
www.fquick.com/transamkid383
www.njfboa.org

hayabusa

Great. The 28x10.5x15 should be large enough to run basically any et I want with the proper suspension,

Memphisblue
Hayabusa

Korndogg

I was thinking about getting some 29.5x10.5's

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