redline at 6?
06-16-2012 | 12:27 AM
#28
as far as the limiter cutting fuel under load, load has nothing to do with it. at all. the car will cut fuel at the preset RPM or higher. actually, IIRC most modern cars cut fuel and spark, but that's not really the issue.
the shift comment was based that most cars ( i never tried this in a cobalt) will cut all fuel causing the car to shut down if the RPM limit is exceeded by a large amount. in other words, it will shut the engine off. which, in the case of a high RPM shift from 4 to 1 would probably be the only chance you would have of still having an engine were that to occur.
the shift comment was based that most cars ( i never tried this in a cobalt) will cut all fuel causing the car to shut down if the RPM limit is exceeded by a large amount. in other words, it will shut the engine off. which, in the case of a high RPM shift from 4 to 1 would probably be the only chance you would have of still having an engine were that to occur.
I used the load situation to try to explain it to you, but I guess it didn't work. Rev limiters help during high load/high speed situations, that is it, nothing else. I go to school for this **** man, I'm done arguing with you if your not going to understand it at this point.
06-16-2012 | 12:37 AM
#29
Senior Member
Joined: 05-21-06
Posts: 5,578
Likes: 3
From: Gainesville, FL
Our speedo's really are that slow, you hit a stock limiter at 64.5mph
When fuel and spark are shut down in the event of a missed shift it has absoluetly no effect on actual engine speed. It will see about 12000 rpm when shifting from 2nd to 1st. No matter what the engine does in reference to fuel/spark at the speed the engine is fucked, either valvetrain or rotating assembly lubrication it is still fucked.
I used the load situation to try to explain it to you, but I guess it didn't work. Rev limiters help during high load/high speed situations, that is it, nothing else. I go to school for this **** man, I'm done arguing with you if your not going to understand it at this point.
When fuel and spark are shut down in the event of a missed shift it has absoluetly no effect on actual engine speed. It will see about 12000 rpm when shifting from 2nd to 1st. No matter what the engine does in reference to fuel/spark at the speed the engine is fucked, either valvetrain or rotating assembly lubrication it is still fucked.
I used the load situation to try to explain it to you, but I guess it didn't work. Rev limiters help during high load/high speed situations, that is it, nothing else. I go to school for this **** man, I'm done arguing with you if your not going to understand it at this point.
as far as the engine being fucked when over reved, that's not always the case. sure, it can and will happen, but i've also seen cars get totally abused and fire back up. combustion stopping CAN save a motor, or, at the very least help prevent an explosively lean mixture. Also, in the case of a stuck throttle (not likely in anything modern) it can save the motor as well.
05-28-2013 | 01:06 AM
#30
New Member
Joined: 05-24-13
Posts: 1
Likes: 0
From: Oklahoma City
I just bought a 2010 Cobalt SS today. I was wondering if anyone knows why the rev limiter is set @ about 6200? My wife's 5 spd HHR with the 2.4 is a little over 6500.
Looks like the 2.0 would be able to turn more rpm where it has a shorter stroke.
Please advise.
Thank you.
Chris
Looks like the 2.0 would be able to turn more rpm where it has a shorter stroke.
Please advise.
Thank you.
Chris
05-28-2013 | 04:59 PM
#31
Member
Joined: 07-23-10
Posts: 287
Likes: 0
From: NS
thus, any increase in rpm will mathmatically net you more HP.
when i got tuned my car, i set it at 7k.
to answer the OP, you can use hpt or trifecta to increase the rev limit.
I would concur with the idea, that you should never remove it. Purely for Derpy mis-shifts.
i can do 0-100 km/h in 1st, to 2nd on f23. 3rd tops out at 150-160 km/h for me, 4th takes me well past the 220km/h end of the spedometer. on a dyno, 4th ended at 240 km/h. i wouldnt be to suprised if i could get close to 300 km/h in 5th, but i would only try it on a dyno. Not many safe highways to do that on around here.
05-28-2013 | 05:18 PM
#32
Senior Member
Joined: 06-02-08
Posts: 2,992
Likes: 2
From: TN
I just bought a 2010 Cobalt SS today. I was wondering if anyone knows why the rev limiter is set @ about 6200? My wife's 5 spd HHR with the 2.4 is a little over 6500.
Looks like the 2.0 would be able to turn more rpm where it has a shorter stroke.
Please advise.
Thank you.
Chris
Looks like the 2.0 would be able to turn more rpm where it has a shorter stroke.
Please advise.
Thank you.
Chris
06-28-2013 | 01:23 AM
#34
New Member
Joined: 06-27-13
Posts: 3
Likes: 0
From: Houston, Texas
Ummm.... you must not no your cars, my dsm did not have a rev limiter and would go to 8000rpm and I dont wanna mess with the gearing cause there nice numbers I just need more rpm solution delete rev limiter.... I know ALOT about building cars, I just dont know **** about newer 2000+ years
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