Anyone? I'm just curious how much pavement hp a car like mine pushes stock. Because once I pop a 15 or 16% pulley on it I'm wondering what the hp difference will be to the pavement.

 

Each car/engine can be quite a bit different, so one person's numbers may not reflect yours. Best thing you can do if you want to have an idea of your numbers, IMHO, is do your own before and after dyno on the same day you have the mod done (as long as the temps are close, if you do the first dyno when its 70 and its 95 later on the heat difference with mess with the basis for comparison).

By the way, if you have the SES light your car is running rich and as I understand it, this can have a negative effect on your dyno numbers.

 

All good points...but I'm wondering if I compare a MCSa dyno to a MCS just to see how much hp is lost with the tranny. Just curious is the normal hp gaines of a pulley will be the same in a MCSa.

But yes a dyno run before and after is the best way to know.

 

like the paddle shifter in MCSA. Do you like it?

 

I like them very much. No longer must I put my car in SD mode if I want some extra speed. Its more like a manual in that I can downshift to pass. (without taking my hands off the wheel)

 

An interesting thing happened to an MCSa at the last autocross with our BMWCCA chapter - one of the axle shafts worked its way out! Made a godawful sound, too. I'm not sure if this will happen to all drivers who punish their cars around an autocross course, but it sure was surprising to me (not to mention the driver!).

 

I had my Cooper S dyno'd last week. It was about 100 degrees. They had trouble with it because of the auto - don't know if it was just lack of familiarity with MINI autos or intrinsic limitations in the DynoJet dynamometer and/or data acquisition software. In any case they had to pull the air/fuel instrumentation off to keep it from crashing the computer, and even in manual mode the car shifted on them at 6600 RPM. The shift caused an anomoly that gave a max reading of 162 HP - but that is not a good number.

When it shifted at 6600 RPM it was making about 154 HP. The output was still climbing nicely. Extrapolating the curve based on the shape of several other Cooper S graphs I've seen I'd say 156 HP at 7000 RPM is about right; in any case I'm happy with 154 HP at 6600 RPM.

The only mods to the car are MTH software, six coats of Zaino and a short antenna. I am probably going to do an intake and pulley and dyno it again down the road.

/gary

 

Sounds good. So the hp loss wasn't to much considering the transmission.

Any idea on the tourque #?

 

136 ft-lbs, pretty much at that level from 4500 to 5200 RPM. Another run was 136.6 ft-lbs but the max horsepower was a tad lower at 152 HP.