Another Change When Running Slicks

[JML68]

Hello all,
Another change we had forgotton about when we made the transition to slicks was that the rear trailing arms were all bumped up to 3/4" dia. from the 5/8" dia. on the school cars. And yes, they will turn into pretzels (with enough horsepower and slicks) though it's probably OK with the stock GT-RA horsepower. Just something to think about as everyone inevitably starts looking for more power.

[Cobra4B]

Thanks for the heads up... I'll check mine out.

[Cobra4B]

The ones on my car are 1". I'll snap a picture tonight w/ my digital caliper on them.

[panoz302]

Mine look pretty beefie too, will put a caliper on them tonight.

[panoz302]

checked my tonight 1" dia put the caliper on them they are the fat ones. however, I do understand the double shear issue. I had the same thing with my lotus, the rear was held together with a single shear joint without a rear bar, which I upgraded as slicks where braking the rear joints. I guest the solution for these cars would be to weld a bracket on around the joints pickup points like the GTS cars, or just take your chances.

[Cobra4B]

^ Just checked mine w/ my caliper... 1" here. I have the beefed up rear brackets too.

[94_panoz_#7]

Actually, It was the thread sizes where the heim joints thread into the trailing arms that John's dimensions refer to.

[Cobra4B]

^ So you mean the place to measure the diameter is on the threaded shaft on the heim joint?

[panoz302]

Those joint are easy to increase in quality and strenght.

[Cobra4B]

^ Which joint? Details?

[94_panoz_#7]

Yes, the threaded diameter on the heim joint is what you need to check. The bigger ones have 3/4" threads, and most of the gtra's were originally built with 5/8" threads.

[David Eastman]

If the nut size is 3/4 the shaft size is 5/8 if the nut size is 15/16 the shaft size is 3/4.

David