Just want to to know if the AUQ 1.8t has one.......never took mine above about 5000rpm. Is it safe to do so ? Always use Helix Ultra 5w30 synthetic on CC stage 1 remap....changed every 5000 miles.
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Rev Limiter
- Thread starter paulos44
- Start date
It should have, if you warm the engine up correctly and cool it down properly then taking it to the Rev limit sometimes won't cause damage, if you bounce it off the limiter every time you in it then it'll put extra stress on the motor and eventually will lead to things failing, the limiter is there to protect the engine but it's not advised to use it every gear change 
Its no benefit to rev out to the limiter anyway, peak power is going to be around 5500rpm anything after that is just a waste, better to grab the next gear and go again!
Not sure with these engines yet as I've not used one in anger, but the merit of revving it beyond the point of peak power is to remain in the power band when you change gear.
I'm sure these engines make a lot of power low down though.
I'm sure these engines make a lot of power low down though.
I'm led to believe this too, tbh we need a dyno graph a log of rpm and wheel speed or maybe a line graph of gear ratio's to get the best answer, I notice a standard Leon 1.8t cupra really looses its breath at about 6k rpm but a stage 1 car probably manages to carry the power on a bit longer, so there can't be a definitive answer due to the so many differing stages of tune on this forum
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Any tuner who remaps a car to carry the power right through to the rev limiter ain't much good in my opinion! 5500rpm and change gear, no matter if its tuned or not!!
That's your opinion.... awesome GTI however seem to think your incorrect, here's one of there own dyno graphs showing a stage 2 K1 first post in this thread
http://www.briskoda.net/forums/topic/177844-dyno-plot-revo-stage-2-on-a-seat-leon-cupra-k1/
I may also be wrong but iirc there is something with bhp at higher RPM, some advantage do to the speed of the internals that I honestly can recall now, either way if your thesis on tuners that map over 5k rpm aren't any good then why doesn't every motor ever made have a limiter at 5.5k rpm?
EDIT: oh and to make it fair here's a 1.8t in an s3 remapped by badger5
http://www.seatcupra.net/forums/showthread.php?t=234021&page=32
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Absolute nonsense. Different engine configurations make their power at different RPMs, if the engine is strong and reliable enough to carry power to 9K RPM then why would it not be tuned as such? Many hondas are designed to make their power just like this.
Why bounce of a rev limiter if there is no need too? Sure they are designed to stop you doing damage so its fine to do so provided your 10+ year old mk1 leon has no problems, and as for some Honda engines, im aware they rev out to 9000rpm + but this is a seat forum, specifically a seat Leon forum! so tell me why you would your 1.8t tuned to achieve its peak performance bouncing of the limiter?
Longer time in each gear means quicker acceleration, it also makes it more usable on track as you can hold a gear longer, also as brick top mentions it's to keep in the power band, I also posted a link to a 1.8t engine in a S3 to make my point fairer to this debate as the first was a 2.0tfsi engine, we didn't say to bounce it off the limiter, we said you can and it has one, first gear is probably negligible changing at 5k or 6.5k due to gearing and speed of acceleration, the only benefit will be you hold gear longer accelerating longer and higher in the power band for the next gear, same probably applies to second too but as you go higher up the box you notice the difference more and more.
Think your missing the point. Tuners don't solely decide where the engine is making its peak power, this is down to the characteristics of the engine and ancillaries. For example on NA carsa 4-1 manifold makes more power at higher RPMs.
If someone has paid for a custom map, they are most likely after as much power as they can safely make.
If this happens to be achieved above 5k RPM then so be it.
Well guys, I have certainly learned a thing or two I didn't know from this thread!!lol makes a change from the same stuff being talked about over and over! So to recap for the guy who started the thread, yes your engine has a limiter, and yes its safe if you hit it! I apologise if I came across as arrogant, the point I was trying to make was in this guys auq engine there is no need to hit the limiter in order to achieve max bhp and carry that into the next gear if its an unmodified car! As for the tuned cars and the tuners I assure you it was not a slur on the fantastic work you do, what I tried to get across was that a tuner will try to extract as much power as possible as safe as possible which in my personal opinion would be as soon as possible on the rev range, however this may not be the case and im sure bill will tear me a new A.hole very soon!! I stand corrected, and await the abuse I so rightly deserve!!!!!!!
Torque torque torque.
its not all about bhp.
The references to a higher rev bhp being better probably relates that you can either run a lower gear at a set speed, or run a set gear at a higher speed.
Look at a gearbox as effectively a torque converter, it takes the torque output from the engine but delivers a different amount to the wheels.
Another car that revs high but is not as quick or exciting at you would think are Rx8s. i believe the torque produced is low..
So yes do get some graphs and work out when the bets time to change gear is, but bear in mind it may be different depending on each specific gear change but also torque needs to be taken into account.
its not all about bhp.
The references to a higher rev bhp being better probably relates that you can either run a lower gear at a set speed, or run a set gear at a higher speed.
Look at a gearbox as effectively a torque converter, it takes the torque output from the engine but delivers a different amount to the wheels.
Another car that revs high but is not as quick or exciting at you would think are Rx8s. i believe the torque produced is low..
So yes do get some graphs and work out when the bets time to change gear is, but bear in mind it may be different depending on each specific gear change but also torque needs to be taken into account.
Civic type R's are another one of high BHP low torque, usually comes from the length of stroke in the cylinder.
Torque is great but there in correlation with each other, torque is how hard it punches you in the seat and BHP is how fast it does it, hence why some diesels are still not as fast as petrol even though they have more torque, also longer rpm range in a petrol car helps too, I do agree that BHP isn't the be all and end all, I come from a diesel background
I think general consensus is that it completely depends on the car in question and there is no set rule on when one should change gear, and to get the best out of your own motor is to work from a dyno graph to find your best shift point that takes all the above into account.
Torque is great but there in correlation with each other, torque is how hard it punches you in the seat and BHP is how fast it does it, hence why some diesels are still not as fast as petrol even though they have more torque, also longer rpm range in a petrol car helps too, I do agree that BHP isn't the be all and end all, I come from a diesel background
I think general consensus is that it completely depends on the car in question and there is no set rule on when one should change gear, and to get the best out of your own motor is to work from a dyno graph to find your best shift point that takes all the above into account.
We need to be careful here, high BHP, low torque is not very accurate. If there is high BHP then there must be high peak torque too, as they are not mutually exclusive.
Remember BHP = Torque x RPM ÷ 5252
Or Torque = HP x 5252 ÷ RPM
Remember BHP = Torque x RPM ÷ 5252
Or Torque = HP x 5252 ÷ RPM
Mountains of knowledge here... All I know is the diesel I use every now and then (130tdi leon) packs a mean punch for about 2 seconds and then it's time to change gear whereas my lcr hits you and keeps you held there for the duration of the gear... good times!
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