Honestly Daniel, I would love to play with this motor building it into a GTS and going for an honest 350 hp, or go insane with a Kuhn twin turbo set-up. But even with as much fun as I'm having, I really shouldn't be here, instead I should be focusing on my own Singerization of an 80 coupe that was originally to be lightweight ugly fast car but turned into a design testbed. Just the machine work on this motor ate up my Kroon wiring harness budget for the car. So either I sell this car when it's done and I've have a little fun with it or I build out my bright dip+anodize service in the next few months and get to keep it. Building a new powder coating booth too. So I think it's going to be a completely stock rebuild, which isn't a bad thing.
Good advice on the crank, I had read about and forgotten the benefits of doing that all in the last 2 weeks. Now that I'm into the rebuild phase, I have to put an official punch list together.
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Originally Posted by DanielDudley
Yikes ! Seems to me that One of those guys over on Rennlist used to have the Holbert speed record car, and that it had the stock cam profile, but altered cam timing. Mark Kibort, I think.
My 85 was owned by a friend of Al Holbert, and was one of the first 32 valve cars in the country. They altered the cam timing on mine as well, but I can't tell you what it is. Kibort will know, if he is still around. From what I understand, you can pick up 25 ponies on an 85/early86 just by replacing the exhaust with a free flow unit. Carl at 928 motorsports used to make one. You might have to get one custom bent today.
Seems like the later heads are also the ones to have, bigger valves. GT spec would be pretty nice, if you can pull that off.
I haven't thought about any of this for years. S4 heads, GT cams and a chip would really get you somewhere. You might want to look into cross drilling the crankshaft. Otherwise, stick to the current redline. A chip may raise the redline, but without altering the crank, you don't want to go there.
Nice project.
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