Which driveshaft would you reccomend? I already have the stock aluminum shaft but it's giving me vibrations at 75+ MPH. I was looking around at aluminum and carbon fiber ones. They range from $300-$800. A little steep, isn't it?

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1988 GTA 5.7L TPI Auto
355 ci. block,TPIS ZZ-9 Camshaft, SLP Headers, Borla Cat Back, B&M Holeshot 2400 Stall Converter, 3.73 Richmond Gears

"Why ride a stang when birds can fly?"

http://www.geocities.com/thegta

 

Nice GTA. Sounds like you have maxed out the 22 lb injectors too.... I have been burning my own EEPROMs for a little while now and that, along with Fuel Pressure tuning has proven that my injectors are limiting my current setup (BLMs just won't come down any farther...). And I read quite a few times that 22lb injectors are good for 400hp..... buncha B.S.

Anywayssss..... I have an Inland Empire Aluminum driveshaft and I got it from Summit for around $350 I think. It is 3" and comes fully balanced and assembled with U-joints. It has performed flawlessly for me. It was nearly as heavy as my crappy steel OEM shaft!! That is a good thing though, as that would indicate the strength of the shaft and support their claims of it being good to like 600 ftlbs. I originally swapped the driveshaft out for vibration issues at high speeds but the added strength is nice to have.....

Laterzzzzz

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1987 GTA L98 MD8
355, TFS Heads, LT4 Hot Cam
My GTA

The Minnesota F-body Club