[Fot] Front and Rear springs

[Jack Wheeler]

 Hi Todd.  I raced a TR-4A years ago, but have driven aggressive TR-3 street cars since college and I still have a TR-2 and a TR-3A today.  When I built a TR-3 vintage race car in the late 90's, I followed Kas Kastner's Competition preparation manual.  For rear springs I simply added a leaf to the stock springs and for the front, I ordered whatever competition springs were available at the time.  Perhaps more important than springs if you want to control body roll is sway bars.  It's been a long time, but I believe I used at least a 1" bar in the front.  Stealing from sprint car technology, I used a tubular bar that was splined on each end.  Then I had aluminum arms made up to slide on the ends of the bar and were made out of 1" by 2" stock.  These arms, attached to the suspension with rod ends provided very firm roll stiffness.  I mounted the bar to the frame with custom made aluminum brackets - no rubber in the system!  I also set up the frame to accommodate a rear bar, if needed.  I would put a big front bar on first and try it without a rear bar.  If it has a tendency to understeer add a small rear bar and go larger until you find the right balance.
Good luck with your project.
Jack Wheeler

    On Friday, January 9, 2026 at 02:04:54 PM EST, Alfetta95 via Fot <fot at autox.team.net> wrote:  
 
 Friends,

What are you TR3 guys using for front and rear springs? Mine are still from when my father raced the car 50yrs ago. Anyone using the Racetorations comp rear springs? 

I’ve ordered the Koni shocks for front and am having the rear shocks rebuilt. 

When Tony Garmey passed me in the left hander at Lime Rock I thought, “hmm that car didn’t show body roll”.  It was then I decided to have a look at mine.  

Any info is helpful 
Todd
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