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Old 06-02-2006, 01:46 AM   #1
WopMaster8
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1994 SC2
Default 0 - 4,000 vs. 4,000+ RPM Acceleration

I know these cars are designed more for economy than performance but what's with the slow acceleration up to 4,000 RPMs even with the pedal floored? Is there some type of restriction device put in by Saturn to help lead footers save some gas money (possibly even PCM programming)? From 0 - 4,000 it's like driving through tar but as soon as the tach hits that mark it feels like the car wants to smoke the tires right off it. It literally jerks my head back every time I take it up that high even when I'm expecting it. I wouldn't mind having that sort of acceleration all the way through if it's possible. So what's the deal?

I couldn't think of a way to search for the information I was looking for without getting a bunch of useless stuff back so if the explanation is already around sorry for starting another thread.

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Old 06-02-2006, 01:49 AM   #2
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Default Re: 0 - 4,000 vs. 4,000+ RPM Acceleration

The "S" series are cammed and timed to reach peak torque right around ~4k rpm. Shy of changing the camshaft (with a custom ground one) you are stuck with what you have.

If you are getting sluggish acceleration even at WOT (Wide open throttle) investigate the possibility of clogged fuel injectors or a bad TPS (Thottle Position Sensor)

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Old 06-02-2006, 08:46 AM   #3
eljefino
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2000 SL1
Default Re: 0 - 4,000 vs. 4,000+ RPM Acceleration

I've found data that suggest the PCM ignores the knock sensor above 3500 RPM or so.

You could try loading up on high-test gas, then going home, disconnecting the battery a while, and going back out there.

It won't cure it but might make the jump feel a little softer if you were previously living with a little knock retard. A good scan tool would tell you.

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