Spitfire/GT6 Rear Spring Elimination

[Clark Lincoln]

Anyone ever replaced the rear leaf spring with an upper control arm (and coil overs, of course)?

 

[R. J. Sorensen]

If it is legal, and if it offered an advantage, Steve Sargis would have tried it. Check with him.

RJS

 

[Jay Lutz]

Yeah like Steve's gonna give that up.

 

[James Rogerson]

Any spring can be used as long as the number of springs does not change. One leaf vs. two coils?

James

 

[carshouston]

Level 1 prep is perfectly legal, did it on an FP Spitfire years ago and I know what ways Sargis rear suspension is setup like. A Spitfire is a single jointed axle, doesn't a GT6 have a double jointed axle? On a Spitfire you can't add an upper control arm because it isn't needed and wouldn't work.
George

 

[rekrace]

The GCR does not distinguish between the years the TR -GT6 was produced. Therefore update/backdate is legal. The early GT6's had a swing axle setup same as the Spitfire. The later GT6's had a full IRS system. And YES, the Spit swing axle can be modified to eliminate jacking forces. My GP car passed daily inspection at the 2003 Runoffs with my setup AND inboard rear disc brakes!
Ron Krantz
ReK Racing