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Er.... Posted by Justin VanAbrahams [Email] ![]() ![]() In Reply to: My spg does 6500 safely (no damage yet) but..., Jon ![]() ![]() |
An '85 SPG (and every other 16v 900) has a fuel cutoff at 6200rpm, so how are you shifting at 6500rpm? Custom chip? I'd be very interested to know where you got it, as I'm looking for one for my '86 900S.
3000rpm is the torque peak on most 900 Turbos. The turbo is spooled up at that point and providing full boost. After 3000rpm torque stops to drop off and horsepower picks up. As such, 3000rpm is where the car feels the most powerful since that's where max torque is. If you're going for maximum acceleration, you want to keep the revs between 4600 and 5500rpm, as that's where max horsepower is. Going beyond 5500 rpm in a stock car is mostly pointless, since that's where both torque and horsepower are trailing off. If you've tweaked your car, there may be more power beyond 5500rpm, but that clearly doesn't apply to most of us. Also, if you have done similar work or swapped turbos or done exhaust work it's possible to move the torque peak up or down - in stock form my '90 SPG generates peak torque at about 2800rpm; in modified form it generates almost 260 lb ft at about 3600rpm.
-Justin
posted by 66.123.9...
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