As above. Thats what my car got on the RR. Seems a bit pants to me!
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124.2 bhp @ the wheels - Any good
- Thread starter Valver'o'Death
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As above. Thats what my car got on the RR. Seems a bit pants to me!
ahh thats alright then!
where u RR that ? i want mine done !!
Interpro is bristol. It only cost £25 to just find out what it was runnin!
Its pretty standard really! Air filter, full exhaust with de-cat and a PBV (Not that it actually does much till i get cams and headwork!)
RRs are useless at measuring absolute power. they are good for setting up engines and for checking differences, rolling before and after a mod
flywheel power is at best a guess and 90% of the times overstated, and that can be easily spotted looking at the left side of the graph.....
Quote: Originally posted by ValveroDeath on 26 February 2004
Its pretty standard really! Air filter, full exhaust with de-cat and a PBV (Not that it actually does much till i get cams and headwork!)
Theyre was a J plate valver there too but that was standard and made 116bhp.
Last time I had mine done it made 122bhp at the wheels (heavy 17 inch ones!!); my mods are chip, exhaust, de-cat, PBV. 1991 car, J-plate.
So looks pretty consistent with previous posts in this thread.
To be honest i dont know my torque figure. Im at work at the mo so ill post it up when i get home and have a look!
different wheel size wont change power and torque figures.
Quote: Originally posted by steve.stapleton on 26 February 2004
Last time I had mine done it made 122bhp at the wheels (heavy 17 inch ones!!); my mods are chip, exhaust, de-cat, PBV. 1991 car, J-plate.So looks pretty consistent with previous posts in this thread.
I had my valver done a few months back and only got 111BHP at the wheels which I was really miffed about. My only mod is a CAT back Magnex, 111BHP works out at less than the standard 137BHP! I cant work this out as I can keep with my brothers Cooper S from 0 to 90 no problem and my car seems to do well against other valvers??
Id take the figures with a pinch of salt.......but I would say that!
Incidently, I had a K&N induction kit on at the time. The car feels a tad quicker without it so it would be interesting to see if it made any difference to the BHP.
The graph reads 117lbs/ft @ 5500rpm. Is that alright?
Its sh*te until 3.5-4k! Were talkin about a Valver here!
why?
they are less. less tyre deformation
Quote: Originally posted by Tom_16v on 26 February 2004
Quote: Originally posted by crono33 on 26 February 2004different wheel size wont change power figures.
[/QUOTE]<!-- ZoneLabs Popup Blocking Insertion --><SCRIPT language=javascript></SCRIPT>Well yes they will actually.The flywheel reading will be the same but the wheels reading will be generally lower with bigger wheels as the transmission loss is greater......
I does if it changes your rolling radius (gearing).
As far as i understand a dyno actually measures thrust at the wheels. By knowing the cars total gear ratio/reduction torque can be calculated. Power is then a product or torque and revs. Flywheel figures are totally estimated by a percentage increase of whats at the wheel compensating for transmission losses.
If a bigger wheel changes the overall gearing then the dyno will under read.
Heavier wheels however will make the dyno over read due to the wheels extra inertia.
Ill try and post em up yeah. Just got to work out how use my scanner first! So are these figures healthy takin in mind its slight mods and 94k its travelled?
decent rolling roads have no excuse not to correctly state a flywheel figure, as when the dyno run finishes and runs down, it will measure the loss through driveline which can then be used to get an accurate flywheel figure. This is all assuming RR is calibrated correctly, which they should be. Anybody know what Renault states as an at the wheels figure for a standard valver, or do they only state the 137bhp flywheel figure, i.e what is standard loss through transmission
