2nd gen subframe

[81 trans-am]

I know its been talked about before but Is there really a benefit to the aftermarket subs when it comes to performance. I love the look but the price sucks. I want a capable car that has all around good performance but 5-7 grand seems a bit much. I plan on a 3-link out back and c6-zo6 brakes. But the front has me stumped on which way to go. The car had bmr stock geometry tubular upper and lower ca's with qa1 single adjustable coilovers. Iknow there are better setups and just would like some other educated pinions.

thanks
karl

[MrQuick]

Your stock frame is more than adequate for a competent handler. Get the right parts on it and big sticky tires. ATS and SC&C are a great a start. links ------>

[Takid455]

Your stock frame is more than adequate for a competent handler. Get the right parts on it and big sticky tires. ATS and SC&C are a great a start. links ------>

I second that. I was in uor boat a couple of years ago when Wayne Due was making them. granted they look nice, if you prep your subframe and add good components, you'll be fine and your bank account will look better. the stock t/a suspension is pretty decent believe it or not. a rack and pinion will be equal to a box if the box and components are in good shape. also, i am told that with big fat tires, you will wear a rack out.

[79T/Aman]

on the subjuct of R&P there is no good rack available at this time that work on older cars with the amount of scrub radius they have.

[81 trans-am]

thanks for the info guys.

what mods should I do to the subframe.

I was thinking about fully welding all the seams but I dont know what else

[dipren443]

thanks for the info guys.

what mods should I do to the subframe.

I was thinking about fully welding all the seams but I dont know what else

Seam welding and grinding would do wonders. I have contemplated picking up a spare frame for my second gen and building it off the car. There is really no need to perform a Guldstrand mod of any sort to a second gen. Stock geometry works fairly well. Upper arms with some added negative camber, bump steer correctable tie rod ends...

Nothing against ATS and their wonderful AFX spindle, but it really isn't any better than stock for a 2nd Gen. It works wonders for a 1st gen, but not so on a 2nd gen. Your stock spindle is fine. Add some good brakes and you will be set. Just throwing this out there, but I will be prototyping bracketry to mount Porsche Brembo Big Red calipers to a stock second gen spindle and a stock second gen rear end. May try and build a few kits to sell. :headbang:

Forget a R&P retrofit. There really aren't any for the 2nd gens right now and even if there were, I doubt they would correct for bumpsteer. Delphi 670 or 800 series box will work very well.

[81 trans-am]

Keep me posted on those brackets. I was looking at kore 3 zo6 setup when i hit the lottery.

[Takid455]

I have seam welded my frame, I haerd it works good as teh factory just had welds at random locations and the frame would move. by welding it, you eliminate that deflection as teh frame becomes a true box frame.

I have the Kore3 C5 set up right now. I am gathering info an the porsche brakes too. it seems that a 996 will work best. the turbos need a 18" or bigger wheel. the chyanne needs even bigger as they can get rotors to 405mm (15.94").

[dipren443]

I have seam welded my frame, I haerd it works good as teh factory just had welds at random locations and the frame would move. by welding it, you eliminate that deflection as teh frame becomes a true box frame.

I have the Kore3 C5 set up right now. I am gathering info an the porsche brakes too. it seems that a 996 will work best. the turbos need a 18" or bigger wheel. the chyanne needs even bigger as they can get rotors to 405mm (15.94").

Precisely why I am going with the 993's. I want to be able to run 17's. PLUS, the rears are lug mount and will be super easy to retrofit. A friend and I have looked at the math, and they seem to be a great match. I will keep everyone up to date.

Nick