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 Transmission / Driveline and Traction
 Slide-A-Link Compatibility w/Aftermarket F-Body Le
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dr. Rick Riviera
Sitting Bull

Belgium
214 Posts

Posted - 20 Aug 2014 :  10:08:54 AM  Show Profile  Reply with Quote
Dear Pontiac Aficionados,

Recently, I've pulled my '72 Firebird through a major suspension rebuild/upgrade, consisting of the Hotchkis spring and control arm kit up front and Global West (lowering) leaf springs out back. I decided to install the Competition Engineering slide-a-link kit I had laying around for over 4 years while I was at it, only to find out the slide-a-link kit's front hanger (that goes in between the stock spring eye bracket and the new solid front spring eye bushing) interferes with the GW spring's 2nd leaf that extends much further forward than the stock one. In order for it to clear and work properly, at first glance the hanger's ears should be taller, while the hanger itself should be shortened about 1/2".
Has anyone run into similar issues and succesfully devised a new hanger? If affirmative, could you be so kind to share some dimensions and assembly guidelines? The challenge I'm currently looking at is beyond my metal fab skills and neither Summit Racing or CE/Moroso could help me out, so it will come down to swapping the old leaf springs back in or abandoning the idea of further improved launches with stiffer aftermarket springs.

Thanks a whole lot in advance for any thoughts and help.


With sincere regards,

Rick

Phil
The Great White Buffalo

USA
7222 Posts

Posted - 20 Aug 2014 :  4:03:08 PM  Show Profile  Reply with Quote
Does the GW 2nd leaf extend to improve traction/reduce spring wrap up?

Bowties are for Pee-wee Herman. "Chevy": even the name sounds cheap, but not as cheap as your Pontiac will be with an LS transplant.
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dr. Rick Riviera
Sitting Bull

Belgium
214 Posts

Posted - 21 Aug 2014 :  02:17:05 AM  Show Profile  Reply with Quote
Hi Phil,

Yes, the GW spring is definitely stiffer and the fact the 2nd leaf extends all the way up to the spring eye suggests it will make the vehicle less prone to wheel hop. However, I can only guesstimate, since I haven't taken the car to the track, so a scientifically just comparison is out of the question, especially with all the other changes, mods and upgrades that have been done.

Do you reckon the GW springs take rear end geometry during acceleration to a level that will not benefit any further from the slide-a-link unit?

Thanks and best regards,

Rick
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Phil
The Great White Buffalo

USA
7222 Posts

Posted - 22 Aug 2014 :  10:51:47 AM  Show Profile  Reply with Quote
Basically what they have done is copy what Rancho did back in the 80's. I still have a set on one of my cars and I combined it with the Adams mod (free) of the front spring eye hanger. It works. Btw, I have never had a wheel hop problem with ANY F-car (2nd gen) I've owned. Wheelspin was THE issue and the combination of the springs, hanger mod and stickier street tires cured it almost completely.

(Track duty requires different rear tires regardless of suspension setup.)

Bowties are for Pee-wee Herman. "Chevy": even the name sounds cheap, but not as cheap as your Pontiac will be with an LS transplant.
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