R53 Cooper S: Absolute Redline?
3rd Gear
Joined: Sep 2014
Posts: 166
Likes: 3
From: Manassas, VA
Let that little motor rev!! If you wanted to putz around at 4k rpm all day long, you could have just bought a Honda Insight
The R53 will only rev until it hits the programmed rev limiter. The rev limiter kicks in at a programmed RPM to protect from over-reving the engine. My 06 MCS JCW GP is programmed with a 7250 limit. If you car has the JCW engine package the rev limit should be about 7200 RPM.
You can safely take the car to the rev limit and you will feel/hear the engine cutting out at the limit. You can try is easily in first gear.
You can safely take the car to the rev limit and you will feel/hear the engine cutting out at the limit. You can try is easily in first gear.
Rev limiter @ 7200 RPM?
I've hit the limiter quite a few times and it makes me wanna get a shift light, but I'm impressed that it's so soft --- it doesn't seem abrupt like fuel cutoff,
is it the e-throttle automatically trimming position?
Or what?
How exactly does it work?
And another question:
I've noticed in listed factory max power figures that the JCW is 210 @ 6950,
while the GP is 215 @ 7100.
Does the GP have a different tune than a regular JCW?
.
Bouncing around a bit this morning trying to find a definitive answer on this topic,
found this on a reddit board:
So the rev-limiter is fuel cutoff?
found this on a reddit board:
(3 years ago)
ModMini wrote:The limit is 6750 for a stock tune. With stock ECU the max rev limit is about 7950rpm, due to memory register size constraints in the code. If you want to go higher than that you need to get an aftermarket ECU such as the Vi-PEC. Don't bump your redline unless you get something like an RMW head with stiffer valve springs, or valve float will destroy your engine. The bottom end can safely rev to around 7500 or so. Rebuild the bottom end with race bearings and connecting rods and you can do 8500 or so.
Also - remember the rev limit is in software - it just cuts fuel to prevent engine from going over the limit under acceleration. It will not save you from a money shift. If the wheels spin the engine faster than the rev limit, you can cause major engine damage!
ModMini wrote:The limit is 6750 for a stock tune. With stock ECU the max rev limit is about 7950rpm, due to memory register size constraints in the code. If you want to go higher than that you need to get an aftermarket ECU such as the Vi-PEC. Don't bump your redline unless you get something like an RMW head with stiffer valve springs, or valve float will destroy your engine. The bottom end can safely rev to around 7500 or so. Rebuild the bottom end with race bearings and connecting rods and you can do 8500 or so.
Also - remember the rev limit is in software - it just cuts fuel to prevent engine from going over the limit under acceleration. It will not save you from a money shift. If the wheels spin the engine faster than the rev limit, you can cause major engine damage!
Further:
Car and Driver wrote:
Throttle response and sheer thrust certainly feels healthy, with a determined burst of acceleration available from the moment the supercharger whine cuts in to the point when the car's red tach needle meets the 7000-rpm redline on the steering-column-mounted gauge.
We found that odd, since the car's output is said to peak at 7100 rpm, and its exertions are electronically limited at 7150. So you get 215 horses, but only for a brief moment before you have to shift to avoid the rev limiter.
.
https://www.caranddriver.com/reviews...ake-road-test/
Throttle response and sheer thrust certainly feels healthy, with a determined burst of acceleration available from the moment the supercharger whine cuts in to the point when the car's red tach needle meets the 7000-rpm redline on the steering-column-mounted gauge.
We found that odd, since the car's output is said to peak at 7100 rpm, and its exertions are electronically limited at 7150. So you get 215 horses, but only for a brief moment before you have to shift to avoid the rev limiter.
.
https://www.caranddriver.com/reviews...ake-road-test/
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