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Spring ratios 
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Joined: Tue Jun 18, 2013 5:09 am
Posts: 386
Location: Launceston Tasmania
Car(s): PR20 1966 1/2 with GT Goodies, Bellett PR20 1968 Orange with Turbo G161 OHV + 1
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Hi All
Wondering what the ratio is for rear springs
By that I mean
If you lower rear springs by 1 inch does it lower the ride height by 2 inches?
Ie ratio 1:2
Thanks
J

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Mon Jul 06, 2015 8:07 am
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Joined: Tue Sep 16, 2008 11:54 am
Posts: 2391
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Measure it.
Pull it apart.
Pull out the upper and lower spring rubbers.
Put it back together.
Measure it again and measure the rubber thickness.
Divide the difference in ride height by the rubber thickness.....
Theres your ratio.

I've always worked out my installed height and spring rate needed and had them made to suit.
Is exactly what the race car has.

Read your sway bar question too and replied.

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Mon Jul 06, 2015 12:46 pm
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Joined: Tue Jun 18, 2013 5:09 am
Posts: 386
Location: Launceston Tasmania
Car(s): PR20 1966 1/2 with GT Goodies, Bellett PR20 1968 Orange with Turbo G161 OHV + 1
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Thanks PR91
on both accounts
Cheers
J

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Mon Jul 06, 2015 10:52 pm
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Joined: Tue Jun 18, 2013 5:09 am
Posts: 386
Location: Launceston Tasmania
Car(s): PR20 1966 1/2 with GT Goodies, Bellett PR20 1968 Orange with Turbo G161 OHV + 1
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In case anyone interested
Lower rear springs by 25mm translates to about 35-40mn ride height
In old language
1 inch lower springs drops ride height by 1 1/4 - 1 1/2 inches
Cheers
J

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Thu Jul 09, 2015 6:27 am
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Always interested.

And thx again for sharing.

Dean


Thu Jul 09, 2015 8:38 am
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