Radial Tire setup

F

fatracing

Active member
I changed from the bias to radial this year- First Gen RX7; any input as to the spring rates and/or camber- Hoosier recommended 3 1/2 negative on front but we found 2 1/2 to work for our car better- we are still running the 400 springs on the rear but it makes the car rotate pretty quickly sometimes causing a snap spin any input as to correct spring rates would be appreciated
 
My experience with the radials is that they break away slowly relative to the bias. Based on what you've said I wonder if you have something else (bind, etc) that might cause a snap spin scenario.
 
nothing obvious that we can tell; Rodney from Appalachian Race Tire said my spring rates may be off hence the inquiry about what people were running-
I agree on the gradual breakaway and really quick turn in so maybe I'll get under and recheck everything again;
also got input that these were almost as good w/ lots of laps as new- mine seemed great until they hit 80 race laps and then no grip

Thanks for your comment- I'll recheck the suspension
 
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