rolling road vs road map results
06 March 2008, 09:29 PM
#31
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Ive had my car RR power runs twice, the first time, the guy said it was pinking, but a further check by the mapper, disproved that. The second occasion my clutch was supposed to be slipping and they could fit a new one, circa £1000. I tried to induce clutch slip by driving on a dual carriage which has quite a uphill slope to it, in 4th gear from 1500rpm and 5th gear from 1500rpm, no slip was evident at all.
On each occasion I was asked what power I estimated the car had, why ask the question. I didnt know, thats why I was there having it RR.
These are my only experiences with RRs so might not be a common occurrance. I wont be naming anybody.
Andy
On each occasion I was asked what power I estimated the car had, why ask the question. I didnt know, thats why I was there having it RR.
These are my only experiences with RRs so might not be a common occurrance. I wont be naming anybody.
Andy
1k for a clutch change; that'd better be some clutch!!
06 March 2008, 10:21 PM
#33
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Just my opinion but for a true set up/bhp run how can you beat the road setup?
You are on real roads at real temps wind speeds etc doing real world things.
On the rollers many things are guessed.
I remember sat on the slam panel
of a competition Gp A 16V Astra at full chat to keep the tyres from spinning on the rollers (and they where competition inters) so how can this be a true reading. All I could think of was how fast the pistons where moving up and down.
It was taken out on the road afterwards to make sure it was ok but surely if the fuelling could have been done then it would have been better
You are on real roads at real temps wind speeds etc doing real world things.
On the rollers many things are guessed.
I remember sat on the slam panel
of a competition Gp A 16V Astra at full chat to keep the tyres from spinning on the rollers (and they where competition inters) so how can this be a true reading. All I could think of was how fast the pistons where moving up and down.It was taken out on the road afterwards to make sure it was ok but surely if the fuelling could have been done then it would have been better
Last edited by rbaz; 06 March 2008 at 10:25 PM.
07 March 2008, 12:38 AM
#35
back on topic!
I did a fair amount of testing with dd and the maha rr and found a fairly consistant comparison. What bob uses as metadata i have no idea, so can not comment on your figures.
Ultimately, dont worry about the figures.. Just enjoy the car!
I did a fair amount of testing with dd and the maha rr and found a fairly consistant comparison. What bob uses as metadata i have no idea, so can not comment on your figures.
Ultimately, dont worry about the figures.. Just enjoy the car!
07 March 2008, 07:58 AM
#36
Scooby Regular
Just my opinion but for a true set up/bhp run how can you beat the road setup?
You are on real roads at real temps wind speeds etc doing real world things.
On the rollers many things are guessed.
I remember sat on the slam panel of a competition Gp A 16V Astra at full chat to keep the tyres from spinning on the rollers (and they where competition inters) so how can this be a true reading. All I could think of was how fast the pistons where moving up and down.
It was taken out on the road afterwards to make sure it was ok but surely if the fuelling could have been done then it would have been better
You are on real roads at real temps wind speeds etc doing real world things.
On the rollers many things are guessed.
I remember sat on the slam panel
of a competition Gp A 16V Astra at full chat to keep the tyres from spinning on the rollers (and they where competition inters) so how can this be a true reading. All I could think of was how fast the pistons where moving up and down.It was taken out on the road afterwards to make sure it was ok but surely if the fuelling could have been done then it would have been better
It has been a while since we have had to employ those tactics...
Our old Sun Ram 12 rolling road really began to struggle with anything over 300hp for grip , it was part of the reason we purchased our DD one....
Haven't had anything trouble that yet as we don't see many 700hp plus cars locally....
I have on occassion really fell out with some road tuners when passing comment on the state of one of their cars tunes , so I refrain from comment now and let the graph do the talking....Life is too short.....
I have always been far more interested in the shape of the power and torque curves and their corresponding boost profile and fuel curve , I couldn't care less if it is 20hp down if all of the above are on the money...
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