[DeTomaso] Aldan shocks help!

Paul - Home thedrol at pobox.com
Wed Mar 24 12:40:07 EDT 2010


A spring can only be loose on a shock in rebound (extension).  This of 
course assumes that the spring perch height adjustments allow enough 
adjustment to allow the weight of the car to sit on the spring and not 
only on the shock.  I'm sure a picture here would make a HUGE difference.

Paul
#9270

Ken Green wrote:
> Paul,
>  
>     I was just considering using the spring length the shock was designed for, and I'm not sure what you run into if the spring is loose on the shock.  If you used an 8 inch spring and adjust the spring seat (right name?) to just hold the 8 inch spring fixed, I think the analysis may be the same, and 2 inches of compression would give horizontal lower control arms for a 400 Lbs/in spring regardless of length?  
>  
>    I assumed that you never want a spring to be loose on the shock?
>  
> Ken
> 
> --- On Wed, 3/24/10, Paul - Home <thedrol at pobox.com> wrote:
> 
> 
> From: Paul - Home <thedrol at pobox.com>
> Subject: Re: [DeTomaso] Aldan shocks help!
> To: detomaso at realbig.com
> Date: Wednesday, March 24, 2010, 7:19 AM
> 
> 
> This isn't correct.  You can use a spring with more than 400 lbs/in if 
> it is shorter when uncompressed than the 400 lbs/in spring.
> 
> Paul
> #9270
> 
> Ken Green wrote:
>> I think Ted Mitchell has done all the hard part.  Looking at his specs:
>>   
>> 552 pounds front sprung wt. per wheel
>>   
>> motion ration of shock is 1.486
>>   
>> force on the shock is 821 pounds
>>   
>> so, if you have 400 Lds/in springs, the front spring will compress just over 2 inches from the weight of the car.  If the spring is relaxed on the shock, then the weight of the car will also compress the shock just over 2 inches.  
>>
>> The Aldan 755 is 15.5 inches, so if you compress it 2 inches, you're at 13.5 shock length, which is very close to having the lower control arms horizontal (Ted says static front shock length is 13.683 inches).
>>   
>> Based on this, it would be hard to lower the car to have horizontal lower front control arms with greater than 400 pound springs on Aldan 755 shocks in the front.
>>   
>> Ken
>>
>> --- On Tue, 3/23/10, Mike Thomas <mbeft
>>   
>>   
>> homas at comcast.net> wrote:
>>
>>
>> From: Mike Thomas <mbefthomas at comcast.net>
>> Subject: Re: [DeTomaso] Aldan shocks help!
>> To: "'Ken Green'" <kenn_green at yahoo.com>, panteratime at aol.com, detomaso at realbig.com
>> Date: Tuesday, March 23, 2010, 6:16 PM
>>
>>
>> I'll leave that to Jack DeRyke or someone with more experience.
>> Mike
>>
>>    _____  
>>
>> From: Ken Green [mailto:kenn_green at yahoo.com] 
>> Sent: Monday, March 22, 2010 6:58 PM
>> To: panteratime at aol.com; detomaso at realbig.com; Mike Thomas
>> Subject: Re: [DeTomaso] Aldan shocks help!
>>
>>
>>
>> Mike,
>>
>>       The 755s are compression, rebound, and height adjsutable.  The 800
>> series are compression adjustable only and the 600 series are rebound
>> adjustable only.  The 655 is just slightly shorter than the 755, I assume to
>> make room for the rebound adjustment.  The 658 uses a 12 inch spring and
>> overlaps the range of the 755 (a little more on the long end). 
>>
>>      What would be great to know is what ride height range results from
>> different spring weights in the front and rear, especially with heavier
>> springs which may limit the ability to lower the car.
>>
>> Ken 
>>
>> --- On Mon, 3/22/10, Mike Thomas <mbefthomas at comcast.net> wrote:
>>
>>
>>
>> From: Mike Thomas <mbefthomas at comcast.net>
>> Subject: Re: [DeTomaso] Aldan shocks help!
>> To: panteratime at aol.com, detomaso at realbig.com
>> Date: Monday, March 22, 2010, 6:29 PM
>>
>>
>> I have the 755's which you'll have to ask the rep how they compare.  One of
>> my goals with the Aldans was to lower the car to the proper ride height.
>> These worked fine.
>>
>> Mike 
>>
>> -----Original Message-----
>> From: detomaso-bounces at realbig.com
>> <http://us.mc308.mail.yahoo.com/mc/compose?to=detomaso-bounces@realbig.com>
>> [mailto:detomaso-bounces at realbig.com
>> <http://us.mc308.mail.yahoo.com/mc/compose?to=detomaso-bounces@realbig.com>
>> ] On
>> Behalf Of panteratime at aol.com
>> <http://us.mc308.mail.yahoo.com/mc/compose?to=panteratime@aol.com> 
>> Sent: Monday, March 22, 2010 2:28 PM
>> To: detomaso at realbig.com
>> <http://us.mc308.mail.yahoo.com/mc/compose?to=detomaso@realbig.com> 
>> Subject: [DeTomaso] Aldan shocks help!
>>
>>
>> Folks,
>> The guy at Aldan wasnt sure if I should get their 658HP or 655HP
>> shock--Wants me to measure original shock on car.  This is for a rebound
>> adjustable shock with poly bushings $400 a set.  Any suggestions on which
>> one I should get?  I understand ride height is the difference.  My car is
>> stock 1972 with original front shocks, not a race car!. 
>> Thanks in advance for your advice. 
>>
>>
>>
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