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Choosing new front springs


Clive

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I want to lower my spitfire by "about" an inch to 7" and stick to about 440-500lb. (I currently have my canleys vitesse 440lb springs on, fitted length 8", the ones on the car were about 9" when purchased :-/  ::))

So, where do I go? TT sell some 480lb jobbies, jigsaw offer a variety of springs, and a whole host offered by motorsprt retailers. But I need the id, is it 2 1/4 or 2 1/2 inches. Also if I order do I buy springs that have a free length an inch shorter than the ones I have?

TIA

Clive

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2 1/4" are too small but I think 2 1/2" will fit although the originals are slightly bigger. Hopefully someone else will confirm.
To find how long they need to be, measure the fitted length now then press the car down to where you want it (get someone to stand on the chassis?) & measure the new length. Say the difference is 3/4" then if the new springs are the same rate they will need to be 3/4" shorter. If the new springs are a stronger rate they will need to be proportionally shorter still.
A 1" shorter spring will lower the car by more than 1" due to the suspention geometry.

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Spring length is very important.
On my TR5 I bought some uprated springs that were supplied too long.........result was two savage spins at Goodwood the second had the car on its side up the bank.
This was caused by rear going into positive camber merely when lifting off at speed resulting in instant loss of grip.
I went on to win my class when I put the standard ones back in, during lunch.

I then shortened the springs by cutting them and using a flame squish the ends down.

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