Well, took my standard 02 Cooper along to a Dyno Day on Saturday and to say I was impressed would be an understatement. I was up first so had no previous runs to compare the readings to so when the graph showed 127.3 I was a little surprised!
The cars run after this all read pretty much as they were expected to but there were no other MINIs there just Minis unfortunately so nothing to really benchmark against. My unmodified MPi Mini got 63.9 versus 63 claimed standard so I feel the Dyno is pretty near the mark.
Now I know that you should take estimated crank power figures with a pinch of salt but all the same I'm as happy as a Pig in the brown stuff!
Was a cold, damp morning which would have helped a lot I know. Car is stock as far as I know, bought 2nd hand from a MINI dealer with standard airbox and filter - I suppose it could have been remapped but I don't know how I would tell. Is there an easy way? Running 17" S-Spokes - would that have made a difference?
Still happy with the car regardless of the numbers, always has pulled like a train from 4K revs!
I put my cooper on a rolling road a year ago and the results surprised me too. I haven't got the curve to hand (although step7 it looked exactly like yours in terms of fonts, layout etc) but I had just over 99bhp at the wheels, worked back to be 126bhp at the flywheel. My father had his car tested at the same time which should have been 136bhp, but was only 130bhp. The car is completely standard (i've had it from new), standard ecu, standard exhaust, even standard replacement runflat tyres etc. I've never known whether to trust the results or not (it's very easy to believe them because you want to) but I've always suspected it can hit 60mph in under nine seconds. Its always had Optimax (to give me the extra 0.5bhp). One thing I'm fairly sure is that it has at least 115bhp. My advice to anyone who mods is test the car beforehand.
I had planned to do some mods to the car over the winter which is exactly why I had it on the rollers to get a baseline figure. The place is really local to me so I hope to be able to get a good feel for what individual mods do to the car's performance by testing at each upgrade. Want to keep it simple really - probably panel filter, Bluefin and an exhaust of some sort, not really decided yet - depends on overtime, pay rise and year-end bonus really!!!!
its a weird thing dynos and dosnet translate to the road due to various things but i take it as a guide for tununig work my cooper made 129.1 unmodded but was on a absolulty balticly cold day and the fan at this place could have powerd a plane etc so im guessing im probs closer to 120 bhp but a mate ran his cooper (same build month and year) and he has induction and a play mini cat back and that gave him 1 bhp more than mine but it did give him a better torque curve so we figured that all the mods for the cooper dont relay start to work unless you have a re-map then have the head and maifold and throttle done as well
minitorque.com, the site for mini performance, drag racing track days & time attack
That's the key really - each RR will be different, so if you can use the same one, as similar as possible conditions (temp, etc.), then you will get a good idea what each upgrade is worth. However you still won't be able to say categorically what your flywheel bhp is/was, just "doing such and such mod gave me an increase of 5hp".
my horn went
the clutch slave cylinder split and a "ROCK" hit my windscreen (ok maybe just a big stone) and some ***** hit my door with theirs and left a nice dent in it...thanks
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What new bits? I didn't buy any new bits...
