just had some figures back from rolling road test makes for intresting reading spent thousands over the years with specialist renault tunners? motec fitted ,newman cams fitted free flow exhaust and manifolds etc etc renault figures say 255bhp at the fly wheel taken with a pinch of salt my first rolling road after the work was done by renault specialist carprint out says 292bhp the car hasent had any thing else done to it but its been on a rolling road to day by one of the top people in the country who have F1 connections reputaion second to non 245bhp at the fly wheel this is a true figure so how does that work then getting less bhp than standard renault factory car , every one hear in the know no exactly who im talking about. so be warned before handing over your cash and think hard. if any one can explain to me these differences then you will be up there with stephen hawkins . rest assured i am not one to be fuuuuked around and i will have my day
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HORSE POWER =BULLSHIT
- Thread starter ray
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Woody
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Hi Ray. I've personally never had a car on a RR, but having been part of the Performance Volvo Community for a few years; what I hear you saying is nothing new. Many disgruntled T-5 owners have been very disappointed like yourself and the answer is often the same. Differences in the RR themselves, atmospheric changes inc Temp etc, variations in Fuel quality and even the operator; are all given as probable causes. This is probably why I've never been bothered putting my 850-R on a RR!!!!!
Mine made 242bhp before the "mods"
Most make about the same. My Excel spreadsheet said 297bhp. Like you, someone with F1 connections tested mine and told me is was 264bhp
I took it somewhere else 2 weeks later and the print out said 301bhp. :s
My major modification has been removed, and the car feels just as fast as it was with that thing fitted.
Funny old game.
Most make about the same. My Excel spreadsheet said 297bhp. Like you, someone with F1 connections tested mine and told me is was 264bhp
I took it somewhere else 2 weeks later and the print out said 301bhp. :s
My major modification has been removed, and the car feels just as fast as it was with that thing fitted.
Funny old game.
interesting but seen before, deal with a lot of bikes using a dyno at spr racing, the amount of unhappy people that have left not making manufacturers power figures is unbelievable, but do not dispair, i may have an answer. most dynos read in sae horsepower, most manufacturers quote power in metric horsepower or PS ((pfederstake) hope the spellings ok,) this seems simple till you figure 1HP = 1.1PS, YES 10% MORE! do your sums with this in mind, also if you want a happy customer, the dyno company will warm the dyno electrics up, (not the dyno, the proccesor and electrics) this will give a hiked result as the software calibrates to 20 degrees c which is industry standard, anything below this will read low and anything above will read high, and i mean this does affect big time, so check if the temp is correct for that day, spike.
I've seen big variations on different but apparently respected RR's with no change to mods. Neither has any link to mods done so no reason to deliberately cheat either way.
Sounds silly but was it done in the same gear?
Did they calculate losses or estimate using the rundown etc?
Temp has an affect, as does fuel used.
If there is time between the tests is the engine still running right? There may be a slight problem....
Sad thing is every RR is different, even the same equipment. :rollseyes:
Hope you get it sorted. I'm sure there is something wrong with the figures somehow.
Peter
Sounds silly but was it done in the same gear?
Did they calculate losses or estimate using the rundown etc?
Temp has an affect, as does fuel used.
If there is time between the tests is the engine still running right? There may be a slight problem....
Sad thing is every RR is different, even the same equipment. :rollseyes:
Hope you get it sorted. I'm sure there is something wrong with the figures somehow.
Peter
Perfect.I am guessing then Ray you are trusting the latest figures and therefore are sceptical of the original ones or the work done ?
On the basis of the work you have had done, and the quality bits fitted, surely the latest figure is either wrong or the setup is not right ?
Does your car still feel a shit load quicker than a stock mk2 ?
Just my thoughts and logic ...
Martin
On the basis of the work you have had done, and the quality bits fitted, surely the latest figure is either wrong or the setup is not right ?
Does your car still feel a shit load quicker than a stock mk2 ?
Just my thoughts and logic ...
Martin
timv6":2q9risll said:
Sorry Tim but you do seem to read me wrong, privately and in public ... Seems I can't post anything to you or Ray without some form of backlash from you funnily enough - that is a bit of a shame ...
I have a lot of respect for Ray, believe it or not, and do trust what he is saying. I didn't think I could be more obvious but my point was then ...
If the new figures are correct, as they have been done by someone Ray trusts - from what I read on face value, then the new figures don't reflect what you would perhaps expect the engine output to be ? I assume that was Rays point - which I agree with, as it seems to make sense. I think anyone would perhaps be dissappointed in those figures after such an investment. So in trying to answer the question he raised - assuming the new figure is correct, then the tuning must be off or the original power figure too high ?
Perhaps I am missing something and you are both playing a game ... Either way mine was a genuine contribution ...
Martin
ray":1fjkq8ss said:
Ray
I'm not trying to be flippant or point out the obvious, apologies if it comes across like that.
I too have paid many thousands for mods from i'd guess the same supplier. I too have been to a few RR's and seen wildly different power figures. I'm only trying to help.
Hope you get it all sorted amicably.
Peter
Thanks Tim, hatchet burried then ... Simple misunderstanding as I too have had no intention to be antagonistic after previous hiccups, I try and post with helpfulness and my words don't have any hidden meaning or intent ...
Going back to the post ...
The odd thing about this HP business is that the difference in figures pretty large that something is clearly confusing matters, whether that be the accuracy of the original figure, the latest one or whether the engine output has changed or does not reflect the modifications done on it. If the latest figure is the one which can be relied upon then this suggests the power output is lower than you would expect - or that the orginal figure was wildly excessive. We are also forgetting about torque aswell though ...
I guess if the car is not performing to expectation then this would be a cause for concern but if it is performing significantly better than a stock Mk2 then maybe the figures are not that important as I don't put people on here in the 'my car has x HP' brigade. Might be worth seeing what a stock Mk2 produces on the same RR to put the thing into perspective and get a relative view, sounds like we would get a shock by the sound of it ...
Martin
Going back to the post ...
The odd thing about this HP business is that the difference in figures pretty large that something is clearly confusing matters, whether that be the accuracy of the original figure, the latest one or whether the engine output has changed or does not reflect the modifications done on it. If the latest figure is the one which can be relied upon then this suggests the power output is lower than you would expect - or that the orginal figure was wildly excessive. We are also forgetting about torque aswell though ...
I guess if the car is not performing to expectation then this would be a cause for concern but if it is performing significantly better than a stock Mk2 then maybe the figures are not that important as I don't put people on here in the 'my car has x HP' brigade. Might be worth seeing what a stock Mk2 produces on the same RR to put the thing into perspective and get a relative view, sounds like we would get a shock by the sound of it ...
Martin
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