Drive line losses
Discussion
I've recently replaced the monaro with an E46 M3, now the Monaro should have been making 400bhp and measured just over 300bhp on the rollers, the M3 should make 340bhp ish and apparantly they show 270-280 on the rollers, is the monaro driveline that much less efficient than the beemer?
Only going by what Mr Monkfish and Mr Wortec tell us, I agree it's only rwhp which is relevant, however they are directly affected by whatever the transmission losses are, on that example if the monaro losses were similar to the beemer it would be seeing another 30 ish bhp at the rear wheels.
Just an observation I found interesting.
Just an observation I found interesting.
I believe wortec use a different dyno for their figures so arnt necessarily related to the one you are looking at.
Hence why there is no point searching for something which may or may not exist (ie lost power)
The topic has been done to death loads before. Basically forget fwhp figures and go by rwhp only. Jez never made the power his was claimed to have on vixpy's dyno. Different dyno's different numbers. All irrelevant
Hence why there is no point searching for something which may or may not exist (ie lost power)
The topic has been done to death loads before. Basically forget fwhp figures and go by rwhp only. Jez never made the power his was claimed to have on vixpy's dyno. Different dyno's different numbers. All irrelevant
if you are that interested there is some science here www.pumaracing.co.uk/trans.htm
My gearbox is being rebuilt at present, whilst its apart I opted to have the internals polished for the following reasons.
1: Reduced Friction, Vibration and Noise.
2: Improved gear change.
3: Less transmission Loss.
4: Reduction in Transmission oil Temperature.
My plan comes unravelled a bit here as I don’t have a dyno sheet from before the polishing to compare it with.
However it will be interesting to see how the overall losses compares to others at the dyno day later this year.
1: Reduced Friction, Vibration and Noise.
2: Improved gear change.
3: Less transmission Loss.
4: Reduction in Transmission oil Temperature.
My plan comes unravelled a bit here as I don’t have a dyno sheet from before the polishing to compare it with.
However it will be interesting to see how the overall losses compares to others at the dyno day later this year.
gareth h said:
I've recently replaced the monaro with an E46 M3, now the Monaro should have been making 400bhp and measured just over 300bhp on the rollers, the M3 should make 340bhp ish and apparantly they show 270-280 on the rollers, is the monaro driveline that much less efficient than the beemer?
Sounds about on the money. In answer to your qestion, yes it is less efficient. In fact the evidence i have accumalated suggests even more so than dynos suggest. Some porsches are down at 12% drivetrain loss, but a monaro is not a BMW or a Porsche.
global-i said:
My gearbox is being rebuilt at present, whilst its apart I opted to have the internals polished for the following reasons.
1: Reduced Friction, Vibration and Noise.
2: Improved gear change.
3: Less transmission Loss.
4: Reduction in Transmission oil Temperature.
My plan comes unravelled a bit here as I don’t have a dyno sheet from before the polishing to compare it with.
However it will be interesting to see how the overall losses compares to others at the dyno day later this year.
1: Reduced Friction, Vibration and Noise.
2: Improved gear change.
3: Less transmission Loss.
4: Reduction in Transmission oil Temperature.
My plan comes unravelled a bit here as I don’t have a dyno sheet from before the polishing to compare it with.
However it will be interesting to see how the overall losses compares to others at the dyno day later this year.
Id suggest a fair chunk of the issue lies in the diff rather than the gearbox. Be interesting nonetheless as you are the first person i know of to do this.
global-i said:
My gearbox is being rebuilt at present, whilst its apart I opted to have the internals polished for the following reasons.
1: Reduced Friction, Vibration and Noise.
2: Improved gear change.
3: Less transmission Loss.
4: Reduction in Transmission oil Temperature.
My plan comes unravelled a bit here as I don’t have a dyno sheet from before the polishing to compare it with.
However it will be interesting to see how the overall losses compares to others at the dyno day later this year.
1: Reduced Friction, Vibration and Noise.
2: Improved gear change.
3: Less transmission Loss.
4: Reduction in Transmission oil Temperature.
My plan comes unravelled a bit here as I don’t have a dyno sheet from before the polishing to compare it with.
However it will be interesting to see how the overall losses compares to others at the dyno day later this year.
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