| vas930 |
12-30-2011 11:39 AM |
Quote:
Originally Posted by RKDinOKC
(Post 6462346)
Is that 370/380hp rear wheel or crank from a K27?
The most I could get out of a very modified K27 on my 2.5 liter 944 Turbo was 340 rwhp, and that was with zero boost regulation, ie., waste gate closed off. Not sure exactly what was done to the turbo it was on the car when I got it. The wheels were not stock, they had been lightened, and it had a bullet on the intake. I did tuning to get it up to 340rwhp. I just don't think the K27 could pump any more air. It came on at 2500 rpm the boost would go up to 20psi from 3000 to 5000 then fall off to 17psi by red line. Higher flowing intake and better flowing headers did not make any more hp. It had light weight rods, knife edge crank, and aluminum flywheel (done by previous owner).
Put the next size up, Lindsey Racing Super 60 turbo on it and it dynoed 408rwhp, but didn't start spooling up till 4500 rpm. The K27 made a lot more useable power. When making MAF tuning runs with 600lbs of driver and tuning passenger it got down to 6 seconds to go from 2000rpm to 7000rpm red line. Thats about 40mph to 110.
Had to rebuild the motor. The previous owner nikasiled the block then put in stock rings, at 20K the nikasil started chipping off and got in the crank and was eating bearings. Did ALL the WYAIT stuff. Stroked it up to 2.8 liters and thought I put in a lightened Ball Bearing Super 60. When done and broke in it dynoed 420rwhp at 16psi of boost. It was very difficult to AX fast. Had to turn the boost down to 12psi to keep it hooked up. Turbo did not come on until 4800 rpm and would hit so hard couldn't keep it from spinning the rear wheels.
When it burned a hole in the head gasket at 4500 miles on the Lindsey Racing rebuild (head lift from improper head torquing), I sold it. Later found Lindsey Racing had put a Super 75 (their biggest) turbo on it, and it was JUST TOO BIG for a 2.8 liter. The K27 wouldn't have been big enough and the Super 60 would have been just about right for 2.8 liters.
|
At the crank.
My idea is to improve the drivability of the power.
I have also talked about the TB Shocks brakes.
My car has had over 400 hp for over 20 years no drama.
Yes its good to improve your driving.
This will make the car more fun all round. :)
|
