Posted By : Jon Low,
10-Oct-2006, 03:31am
With regard to my request for a soggy rear spring, my current suspension set up is a follows:-
550lb front springs. (canÂ’t go much higher as it is a road car, or it will shake itself to death).
7/8” front anti-roll bar. (Did fit a 1” version but took it off).
AVO adjustable platform shocks.
Approx 2 degrees negative camber.
Rear swing spring has been re-tempered as per US Competition Preparation Manual – SCCA spec. I quote :-
“The first job is to remove the stock rear spring and have it de-arched by a spring shop to 1”, ie, with the main
leaf resting on the workbench, it should measure 1” from the bottom of the leaf to the bench. Next cut off the second leaf at
the point where it wraps around the eye. This is to prevent it from bottoming where it flexes.” The rear has very little
movement no matter how hard you try to bounce the rear.
¾” diff spacer to lower the rear..
AVO adjustable shocks.
I have also tried a US spec rear anti-roll bar, but found handling worse with this on, so removed it.
Not understanding suspension theories very well, I had always worked on stiffest must be best. But a couple of season ago I used someone
elseÂ’s Spitfire at Brands. This car was very soft at the back and although it did tend to roll and drift out of corners, it
was very predictable and I new where it would drift out to on the track. It was much more forgiving and although this car was down on power
compared to my car, I was actually quicker and I enjoyed the drive, when I canÂ’t really say my car is nice to drive.
Another point of note is that a while back I fitted the MOSS uprated rubber bushes alround. DidnÂ’t go the polybush route, as
at the time I was worried again about it shaking itself to bits on the road - perhaps IÂ’ll change when funds permit next time
round.
I know everyone has different ideas and different driving styles , but when I have tried to request help from the other race guys, I seem
to get non committal answers – giving not much away. So any thoughts on rear end setup would be most helpful.