[DeTomaso] Resetting Ride Height With Stiffer Coils

[Paul - Home]

Goran is of course correct and the reason is that springs are not 
installed vertically, they are at an angle.

Paul
#9270

Pantdino wrote:
> It will be interesting to see if that is the case.
> Goran sent me some information regarding suspension systems once that was over my head, but I do remember that the force felt by the spring is not the same as the weight on the wheel.  Therefore the change in spring compression may not be 0.4"
> 
> 
> Jim
> 
> 
> -----Original Message-----
> From: David & Marilyn Bell <davidabell at worldnet.att.net>
> To: Mike Thomas <mbefthomas at comcast.net>; 'Tony DiGiovanna' <tonydigi at optonline.net>; detomaso at realbig.com
> Sent: Mon, Aug 23, 2010 10:23 pm
> Subject: Re: [DeTomaso] Resetting Ride Height With Stiffer Coils
> 
> 
> Mike,
> If your car weighs roughly 3200 lb and the weight distribution is roughly
> 0/60 front to rear, then the weight on the front is 1280 lb so each front
> pring must support 640 lb.  A 350 lb/inch spring will deflect 1.8" under
> han load while a 450 lb/inch spring will deflect only 1.4".  So you need to
> rop your front spring perches by approximately 0.4" to maintain the same
> ide height.
> Dave Bell
> 
> ----Original Message-----
> rom: detomaso-bounces at realbig.com
> mailto:detomaso-bounces at realbig.com]On Behalf Of Mike Thomas
> ent: Monday, August 23, 2010 7:44 PM
> o: 'Tony DiGiovanna'; detomaso at realbig.com
> ubject: Re: [DeTomaso] Resetting Ride Height With Stiffer Coils
> 
> hanks.  Should have added that both new and old springs are 10" Aldan
> oils, so the free height is the same on both rates.
> Mike
> -----Original Message-----
> rom: Tony DiGiovanna [mailto:tonydigi at optonline.net]
> ent: Monday, August 23, 2010 5:23 PM
> o: 'Mike Thomas'; detomaso at realbig.com
> ubject: RE: [DeTomaso] Resetting Ride Height With Stiffer Coils
> Don't assume the new springs will have the same free height.
> hink you are best served to measure the ride height of the car relative to
> he ground with the old springs, then change springs and adjust back to
> hose settings.
> -----Original Message-----
> rom: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
> ehalf Of Mike Thomas
> ent: Monday, August 23, 2010 8:11 PM
> o: detomaso at realbig.com
> ubject: [DeTomaso] Resetting Ride Height With Stiffer Coils
> OK, time for the math wizards to have a head shed . . .
> I'm swapping out my front springs from 350 lbs to 450 lbs, and want to
> chieve the same ride height.  Since I won't (I assume) get as much spring
> ompression with the 450's, I'll need to revise the spring perches on my
> ldan shocks.  I'm guessing I'll need to compress them slightly more on the
> hock (the collar height up the shock body) since the springs won't drop as
> uch when I let the car back down and the springs settle in.  My car is
> tock up front with the addition of an aluminum radiator, so probably close
> o stock weight on the front wheels.
> Any thought on how much more to compress, or notes form someone whose been
> here, would be helpful.  Pulling and readjusting or trying to adjust the
> ront on the car are both a much bigger PITA than the rears.  I'd like to
> ave to do it as few times as possible.
> Thanks in advance for your sage advice.
> Mike Thomas
> ellow '74 L #6328
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