GotaT,
Sorry if this thread is heading in a "how to get to 250 HP" direction. We can start a new thread. Spuggy is correct in that you will want to add some type of limited slip differential in a 8.3:1 915.
Quote:
Originally Posted by Eagledriver
The small ports are probably hurting you the most. I also have an M&K muffler and I suspect it is costing some power as well. You have really good torque. You may also be able to run more ignition advance. I'm running 30 degrees total but some of our guys are running more. I don't know what the safe limit is. Our spec class has found that the big port motors have more power even with the stock 8.5 pistons than the small port motors.
-Andy
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Andy, when the car was on the dyno, we advanced the timing to get these results, though I do not know what the final timing number is. I recocnize the later SC engine is more of a torque motor w/o the big port heads. I first considered hogging out the smaller intake and adding 964 cams but then I would be in the same boat as GotaT... I would be searching for more power a short time later.
GotaT - bumping power by over 35% in a 2400 lb car will make a huge differrence. I was thinking my measely 50 hp increase (25%) would be significant.
