power levels

[nerosis]

there was a video posted on her about a guy showing off the sound of his exhaust, and then it shown his rev counter. and everyone was saying how he cudnt drive his car properly coz he kept redlineing it. then sumone mentioned a power rev or sumthing, like the exact time to change gear to get better shifts and better performance and more speed outta the car.

cna anyone clarify what was being said?

 

[Donz144]

RS Clio has a green 'rev limit' light that flashes at about 7000rpm just before rev limiter kicks in. Some call it an OPTIMAL gear change indicator

 

[edde]

The 172/182 light is just a warning of getting close to the redline not an optimum gear hcnage light.

 

[D1CKY]

The 172/182 light is just a warning of getting close to the redline not an optimum gear hcnage light.

I wandered what the light was for :S (Thought it was a gearchange light as well)

When does everyone change before light ?

Or on it ?

P.s sorry to hi-jack your post

 

[kully]

actually there was another thread regarding a raised rev range too . basically as said above the green gear shift light comes to change gear , but raising the limiter means you can go that bit further in that gear before you need to change up , giving in theory a quicker power deliverance when gear is engaged .

 

[Peperami]

The green light means, change gear now, you're about to hit the limiter.

From memory 6700rpm is the best time to change.

 

[trile]

yeah, about 6700 or 6500... i think

 

[kully]

lol ....... what a few hundread revs between friends .....hehe
normally change around 7k ish tbh

 

[matt__f]

I never hit the limiter intentionally, highest I ever go is 7k although I try to change around 6800-6900

 

[kully]

I never hit the limiter intentionally, highest I ever go is 7k although I try to change around 6800-6900

even better now i've got a raised limiter , but technically still means it's more wear on the car :quiet:

 

[matt__f]

lol,

What did you have the limiter raised to?

 

[kully]

lol,

What did you have the limiter raised to?

7600 ......... power maxing out around 6900 ish

 

[matt__f]

lol,

What did you have the limiter raised to?

7600 ......... power maxing out around 6900 ish

quite reassuring that when mines on the limiter its not doing too much harm then. Although saying that I still don't fancy it staying there very long :nono:

 

[kully]

7600 ......... power maxing out around 6900 ish

quite reassuring that when mines on the limiter its not doing too much harm then. Although saying that I still don't fancy it staying there very long :nono:

paul took it for a run and showed the raised limiter ....errr ok i said it showed nearly 8k on revs , my poor car ......heehehehehehe

 

[matt__f]

paul took it for a run and showed the raised limiter ....errr ok i said it showed nearly 8k on revs , my poor car ......heehehehehehe

At least you know its nicely run in now

 

[GordonD]

there was a video posted on her about a guy showing off the sound of his exhaust, and then it shown his rev counter. and everyone was saying how he cudnt drive his car properly coz he kept redlineing it. then sumone mentioned a power rev or sumthing, like the exact time to change gear to get better shifts and better performance and more speed outta the car.

cna anyone clarify what was being said?

The more power your engine is producing the faster it can accelerate. The power curve - how much power through the rev range - is like a hill. The closer you can keep the engine to the revs at which the hill's peak occurs at the faster you can accelerate. So on a car where the peak is at 6,000 rpm you might change up at 7,000 rpm, which would cause the engine to drop back to 5,000 rpm, then accelerate until the engine reaches 7,000 rpm again, then change up again. That would keep the engine closer to its power peak and produce more acceleration than only revving to 6,000, or revving all the way out to 8,000 rpm.

What the best revs to revs out to before you change up depends on how rapidly the engine's power falls off after the power peak, and how widely spaced the gears are. But you should never wait until you actually hit the rev limiter because as soon as it cuts in your engine is producing very little power.

It happens that because the Clio Sport engine's power doesn't fall off particularly rapidly after its peak at 6,500 rpm, and because it doesn't have a particularly close ratio gearbox, the best point to rev out to is as close as you can get to just before the rev limiter cuts in. And Renault conveniently gives you a little light that comes on just at that point telling you "you're almost at the point where the rev limiter is going to cut in, change gears now".

 

[GordonD]

Having just looked at the Clio Sport's gearbox ratios I'd suggest that there's so big a gap between first and second that you might actually get best acceleration by letting first gear go all the way to the rev limiter. If you don't when you change into 2nd the engine's actually below the point at about 4500 rpm where you get that "kick".

The only gearchange where the ratios are close enough that you wouldn't at least go to the green "change" light is the 3-4 change.

In fact looking at the numbers it appears that a Group N ECU or other ECU remap that moved the revs the limiter cut in at up, and so let you go a bit further past the power peak before you change up, would improve acceleration even on a standard engine.

 

[D1CKY]

The green light means, change gear now, you're about to hit the limiter.

From memory 6700rpm is the best time to change.

Ok cool cheers