Speed limiter on C5....??
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Speed limiter on C5....??
I had the opportunity to run the vette on an approved speedway the other day. My 99 Vert is bone stock. The fastest top speed I could achieve was 146mph and at that point it seemed to be limited and actually started to decrease in speed. I though top speed in the C5 was up near 170 mph.... Is there a factory governer installed? 
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I had the opportunity to run the vette on an approved speedway the other day. My 99 Vert is bone stock. The fastest top speed I could achieve was 146mph and at that point it seemed to be limited and actually started to decrease in speed. I though top speed in the C5 was up near 170 mph.... Is there a factory governer installed?
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That is what I did wrong....It is a 6spd and I did run it up in sixth gear... I never figured to leave it in 5th....I ran it up a second time and it would get to 146 and stop pulling and then the speed actually started dropping...and yes...I had my foot in it all the way....Next time Ill try not shifting into 6th...Thanks for the tip Zilla!...
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That is what I did wrong....It is a 6spd and I did run it up in sixth gear... I never figured to leave it in 5th....I ran it up a second time and it would get to 146 and stop pulling and then the speed actually started dropping...and yes...I had my foot in it all the way....Next time Ill try not shifting into 6th...Thanks for the tip Zilla!...
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Top speed for me....163mph still with engine left, just no more "track"... Comm. Edition 6 speed with windows up and roof on! What a screamer!!!!!!!! I love this car soooooo much!!!!! My heart does as well, gets the blood and adrenaline goin good!!!!!!! 
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From: Lacey WA RVN 68-69
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There is no speed governor but I think there is a fuel cutoff somewhere above 6000 RPM simply to save the motor from over-revving damage.
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From: Texas
Gonna try my hand at the Texas Mile soon, I don't think I can top it out in a mile though. At the local high speed straight 'track' I have been to 181, little scary when you are there, gotta be scarier for the 'Busa going 186 'before' me though 
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There is something very special about the CE's. I love mine also. David
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From: Foresters Falls(near Ottawa) Ont
But, isn't the engine rpm limited in any given gear by the computer? Like you can't over-rev it unless you gear down two gears by accident. Same result as a speed limiter. For a given rear end ratio you are only going to go so fast. I think I once saw a chart showing a theoretical 158 mph top speed with a stock 6 speed C5 coupe before the engine is cut back.
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No, what I stated was exactly true. If you want to go faster than 255mph, you won't be doing it with a GM PCM.
You CAN set the PCM limit to anything (less than that) if you want, in fact you can even create a valet mode and limit your car to 20 mph if you'd like (or mistype)...but that does not disregard the fact you won't be going over 255 on a stock PCM.
You CAN set the PCM limit to anything (less than that) if you want, in fact you can even create a valet mode and limit your car to 20 mph if you'd like (or mistype)...but that does not disregard the fact you won't be going over 255 on a stock PCM.