I've purchased some 30% uprated springs and they are supposed to deliver
a stock ride height.
As compared to the stock springs, the coils on the uprated springs are
thicker in diameter and there are more coils than on the stock springs.
In the case of the rear springs, both the stock springs and the uprated
springs are the same height -- both unloaded. However in the case of the
front springs, the uprated springs are about 3/4" shorter than the stock
springs.
This doesn't make sense to me. Seems both the front and rear should be
the same height difference as compared to the stock springs. The rears
should not be the same height while the fronts are shorter.
The company I bought them from said the uprated springs should be
shorter than the stock because they are stronger -- which makes sense.
They then suggested that my stock rear springs should be taller than
they are, and taller than the uprated springs. They suggested that my
rear springs have sagged but the fronts have not.
They also said the rear uprated springs make a TR4A ride higher than
stock but that they didn't think it was true for the TR250. Seems to me
the TR250 and TR4A are the same. This doesn't make sense to me.
The uprated rear springs are 11" tall and the uprated front springs are
9.5" tall.
All measurements and comparisons were made with all springs unloaded --
out of the car.
I am the original owner, so I know the springs are stock.
Any thoughts/comments would be appreciated.
Thanks,
Don Malling
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