Coil Spring Question - First Generation Pontiac Firebird (1967 - 1969) - Firebird Nation

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Coil Spring Question


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2 replies to this topic

#1 DM3

DM3

    Firebird Tune up Technician

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  • First Name:Dirk
  • City:Cherry Hill
  • State or Province:NJ
  • Country:USA
  • Year: 1967
  • Make: Pontiac
  • Model: Firebird
  • Engine: 400
  • Transmission: 4 Speed

Posted A week ago

I replaced my old springs with new stock height springs.  I made the mistake of purchasing them on ebay.  When I received the springs, they were just in a box, no paperwork etc.  Since the suspension seem soft, I really dont know if I got what I ordered.
 
The car has the following, tubular arms, QA-1 TN505 non-adjustable shocks, QA-1 sway bar, replacement Moog 5370 coil springs?? (ID - 3.63", Bar Dia. - 0.64", Spring Rate - 357, Load lbs. - 2022, Install Height - 10.25, Free Height - 15.94, # of coils - 9.81, OD - 4.91")  When  I searched the Moog site, these springs does even come up for firebird.  So they might not even be Moog springs. 
 
So I am looking to replace the springs again, but this time replace with a stiffer than stock coil spring.  Any suggestions?

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Twitter: @Dirk67bird

1967 Firebird 400


#2 fourthirteen

fourthirteen

    Firebird Tire Changer

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  • City:East
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  • Year: 1967
  • Make: Pontiac
  • Model: See the above photo
  • Engine: 400
  • Transmission: Manual, 4-speed, Muncie

Posted A week ago

Youre talking about front coil springs, right? Or did you replace the rear leafs with coils? The reason I ask is that the front looks fine (well, maybe a tad high) but the rear is high. So what are we talking about here?

Edited by fourthirteen, A week ago.


#3 GTOLou

GTOLou

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  • Year: 1976
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  • Model: TA
  • Engine: 455
  • Transmission: 4speed

Posted 6 days ago

Man - I really try my best to use aftermarket coil springs and not "stock" replacements. They have gotten super high $, but hotchkiss springs are great. Plus they are shorter and have a higher spring rate (shorter = easier to install). 






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