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My Rolling Road Results
- Thread starter Craig.D
- Start date
MarkCup
ClioSport Club Member
146.7 at the wheels is a good figure.
Translating that to 190+ at the fly is a bit optimistic I'd say.
Translating that to 190+ at the fly is a bit optimistic I'd say.
e92 + E46 M3 + Cup
148 @ the wheels
191 @ the fly.... that cant be right
I made 184bhp at the fly & that was some thing like 151bhp @ the wheels
191 @ the fly.... that cant be right
I made 184bhp at the fly & that was some thing like 151bhp @ the wheels
Those results look f**king good 
What remap do you have ?
Whats the going rate for a couple of power runs on a RR anyway ?
About 50 quid ?
I fancy getting my 172 on one to see what its pushing out with my stealth stainless exhaust c/w decat, Itg with uprated feed and Grp N Remap. (Soon to be matched inlets and a remap again)
And i'm not meaning to be a knob but doesn't 191bhp seem a bit high for just those mods ?
I mean theres no decat, or is it just a good car with luckily more power than many others to start with ?
What remap do you have ?
Whats the going rate for a couple of power runs on a RR anyway ?
About 50 quid ?
I fancy getting my 172 on one to see what its pushing out with my stealth stainless exhaust c/w decat, Itg with uprated feed and Grp N Remap. (Soon to be matched inlets and a remap again)
And i'm not meaning to be a knob but doesn't 191bhp seem a bit high for just those mods ?
I mean theres no decat, or is it just a good car with luckily more power than many others to start with ?
Last edited:
Golf
Those results look good
What remap do you have ?
Whats the going rate for a couple of power runs on a RR anyway ?
About 50 quid ?
I fancy getting my 172 on one to see if it is a 172, or sorry a Clio 168 (168bhp ish) which i heard there meant to be.
My standard 172 only made 165 lol
RS6+ & 40d MSport X5
I'm sure i seen it outside the shops on wallacewell rd last night.. the scooby i mean!
MarkCup
ClioSport Club Member
Calm down!!!
We're just pointing out that;
a) you have a good genuine ATW figure
b) in reality that's probably putting your flywheel power in the mid-to-late 170s.
e92 + E46 M3 + Cup
+1
You should still be happy with that though mate
RS6+ & 40d MSport X5
Panel filter and a custom cat back system but ave never bothered putting it back on a dyno, dont really believe in them
I see.
Do you not beleive them because you pushed our 165bhp ?
Or is it just a personal thing ?
How is this worked out any way ?
The power at wheels figure ?
Does it take into account transmission loss etc from flywheel power figure ?
And is it all calculated out by the dyno machine or does the operator do it in his head or with calculator ? (sorry if this sounds silly)
e92 + E46 M3 + Cup
The TRUE reading is record at the wheels then depending if your car is FWD, RWD, 4WD they work out "roughly" how much trasmission loss.. belive FWD is around 18% not sure though
Renault Clio 172 Ph2
Flywheel measurements are bullshit
All measurements should be taken from the wheels. Its just the standard method is from the fly. God knows why it ever went down this route.
The power is calulated from the wheels which is great. But how on earth does the rolling road know if the car has a good gearbox on it?!?!?!?!! It doesnt.
So its never accurate.
All measurements should be taken from the wheels. Its just the standard method is from the fly. God knows why it ever went down this route.
The power is calulated from the wheels which is great. But how on earth does the rolling road know if the car has a good gearbox on it?!?!?!?!! It doesnt.
So its never accurate.
Renault Clio 172 Ph2
thats the problem with it. with these companies who offer these services, they cannot offer an accurate calculation.
One car can have an amazing gearbox with 200hp at the wheels
one car can have an awful gearbox with 200hp at the wheels
the one with the awful gearbox in the above cases has more power at the fly, but is loosing more before the wheels.
the flywheel figure on that sheet will be the same. i assume.
ITB'd MK1
some rollers can do run down measurements for transmission losses, they're not exact but pretty close mostly. Increased tyre pressures would have given a greater measured loss, so if they pumped your tyres up before the run, that would explain the high flywheel figure.
And to be honest, dont obsess about a few hp here and there, a chassis dyno is a tool for preparation of a car, there's margin for error when doing power runs. The wheel figure looks health, be happy with it
And to be honest, dont obsess about a few hp here and there, a chassis dyno is a tool for preparation of a car, there's margin for error when doing power runs. The wheel figure looks health, be happy with it
Good condition 172/182 looses between 14 and 18% through the box, drivetrain, engine ancils etc. etc.
Your 146bhp (which is a good figure BTW and probably about right, never can tell with a Dastek due to how it measures wheel torque) is somewhere between 166bhp and 172bhp, which isn't bad at all for the modifications you have - essentially its a standard engine making standard power and we all know they don't make standard power as standard.
It's well worth reading up on how rolling roads actually measure wheel torque (and therefore power) and how they calculate flywheel power from this. To give you some idea on RS Tunings Dyno Dynamics rolling road (which I like because they are never optimistic if used properly) my car on the run I can find made 155bhp wheel power and 182bhp flywheel power, bang on 18% losses which I'd expect to see for a pretty old gearbox with thick oil in it.
Cheers
M
182
my RStuning results are 146 atw and 176 atf, so 17.5% losses for me
182
to put it in perspective, you losses are estimated at 23% give or take
so as above, flywheel power is a calculated guess
so as above, flywheel power is a calculated guess
The Chubby Pirate
ClioSport Club Member
Golf R
Theres alot of different variations in getting a proper figure and not alot of places have that accurate set-up tbh
Room temp, Tyre Pressure, Fan placement, miles on the car etc
Im intrested to see what my car would make being nearly 8 years old but i fear it might be money wasted as alot (if not all) so many people are sceptical about accuracy of figures.
If the BHP figure is high that means the rollers are broken/inacurate
If the figure is low then your cars broken.
Cant win tbh!
Room temp, Tyre Pressure, Fan placement, miles on the car etc
Im intrested to see what my car would make being nearly 8 years old but i fear it might be money wasted as alot (if not all) so many people are sceptical about accuracy of figures.
If the BHP figure is high that means the rollers are broken/inacurate
If the figure is low then your cars broken.
Cant win tbh!
182
if you want to figure out if your car is on the money then go along to a rr day with similar/identical cars, and compare those figures
RR's calculate the power at the wheel. Unless it was attached to the fly
over 190 for those mods is tard, 146 at wheels sounds right
378bhp Leon Cupra R
Right after all the response i contacted the guy that remapped my car and explained the response i got....so he phone his programmer whom is involved in the clio cup racers and the guy told me to call him....which i done and the guy was great what a anorack.....emailed him the graph and he phoned me back to say the reason my ATW power is down is because the IDIOTS at the rolling road forgot to turn the traction control off thats why the torque on the graph is up and down. and by doing it the traction eventually fails...then i thought to my self the lights on the dash where on when i left the RR and would switch on again until i drove for a few mins.
gonna phone the rolling road idiots tomorrow.
:evil:
gonna phone the rolling road idiots tomorrow.
:evil:
182
there is a dip maybe, but i dont understand why you are upset about your at the wheel figures, they are very good!!!
there are loads of other thread on this site with the same issue!!!
i estimate your flywheel output to be around 183 which is very good, even taking into account your mods
the 1*2 is know not to make its quoted power
there are loads of other thread on this site with the same issue!!!
i estimate your flywheel output to be around 183 which is very good, even taking into account your mods
the 1*2 is know not to make its quoted power
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