I dyno-ed my 03 JCW S yesterday at Performance Autosport here in the Richmond, VA area. Performance specializes in Saleen Mustang tuning but welcomed MINI owners with open arms :smile: and uses a Dynojet machine.

http://www.performanceautosport.com/frames/

My car is stock and features the 200hp kit (head, plugs, wires, SC, pulley, exhaust, ECU) as well as the new JCW airbox and bigger injectors . The wheels are 16" R90s :smile: featuring heavy and very worn Dunlop runflats . Mileage is almost 30K.

It rained in the morning, but then began to clear as we arrived at the dyno shop. In between pulls, we paused 5-10 min and placed a bag of ice on top of the intercooler.

The results:

3rd pull (me) @65 deg F, 51% humidity: 188 hp, 163 lb-ft
2nd pull (me) @64 deg F, 54% humidity: 183 hp, 159 lb-ft
1st pull (technician) @63 deg F, 60% humidity: 179 hp, 159 lb-ft

Quite healthy numbers however there is always room for improvement . The graph showed it is strong in the mids and highs as it should be but could use a few more ponies down low, but then again it feels just fine using the butt dyno . The car really appreciated the ice in between runs or something that's for sure! We put the ice on top of my friend's intercooler and it didn't make any difference . It appears I took the car up to 6800 rpm with each pull. The technician commented on the smooth and linear power delivery compared to other (non-MINI) cars.

Here's a link to a graph of my best run as well as that of my friend's modded MC40:

http://www.rivercityminis.org/forum/viewtopic.php?t=178

 

Hi I just dynoed my 04 with a BMP. got a 162/143 6K for rpm and in 4th gear as we did not know what gear was 1-1.

What gear were you in with your test ???

 

Very nice! I'd be interested to see the air/fuel trace but strong numbers.

 

Very interesting graphs. I have the JCW 210 and there are so few JCW dyno runs out there, and some of them were not so good. Which is weird because I have no lived with an average modded MCS (my first one), and this JCW, and I can tell you the JCW is quicker, no doubt about it. I will be getting mine dyno sometime in the next month or so.

 

what do you think that business is a t 6000? timing retard due to knock sensing?

 

Hey guys thanks for this post.


I did mine a few weeks ago and got 178 as well. No ice and questionable cool down. This week I am going to Miltek header to tip and Pilo coil and nology wires IK22 plugs. I have got steady state partial throttle "stumble/jerky" issues. If I can clean that up I am off to re dyno. Does the JCW run smooth on the street through the power band? If you hold 3K in 3rd is it smooth or does it display any stumble?

 

We used 4th gear for all 3 pulls. I have a graph of the air/fuel mixture and will try to post that one soon.

 

I find the JCW runs exceptionally smooth, compared to some aftermarket setups. I have not tested lots of chips, so it may very well be that something like the Unichip could give you an acceptable amount of smoothness, or bring it to at least as good as the JCW.

 

I'd be curious to know what a stock MINI does on the same dyno.

 

has anyone tried an aftermarket pulley with the 05 JCW kit? When I say tried, I mean via fanny dyno, and, the real thing. My 05 JCW kit will be installed this Friday. I can't imagine wanting more power for a commuter car, but the pulley is an intriguing option.

 

The JCW Kit comes with a reduction pulley.

 

Yup, I know. There are more aggressive aftermarket pulleys available. Just curious about dyno results if any exist...perferrably not fanny dyno.

 

Based on those runs it looks like the Cooper is more efficient than more cars with regards to drivetrain loss.......15% worst case......not bad.

 

I looked at my air fuel ratio and at 2700 it was on 13 and ran flat to 4200 then fell to to 11 at 4700 and was flat to 5500 then fell below 10 at 6100 and was off the chart from then on. I get my JCW put on in 10 days.

Crank Calc at 192hp/ 168 tq Based on 15% DL loss, Test at 3pm clear and dry, fan on motor for test.
TulsaDyno did the work and this was a SAE test dyno set up.

 

It doesn't make sense to spend $6K on a Works Kit if you're going to mess with the supercharger (or head). If you don't think you'll be happy with the performance of the kit, go aftermarket from the get-go

 

MCMike, please don't forget to post the a/f ratios. I'm very curious to see what the JCW 210 is doing with a/f. Thank you for sharing this information with all of us.

 

Does any one have flow information on the JCW head?

What type of porting work we done on the JCW head?

 

YES, I'm anxious to see the A/F as well and how the JCW programming does at the 4500rpm crossover and again uptop.

I am guessing we'll see about 12:1 from 3500 on up....

 

From what I have been reading the 05 JCW Kit comes with a 14.8% reduction pulley the first gen JCW Kit came with a 13.8% reduction pulley. Does anyone know if this is fact?:smile:

 

Time to read ...

Let's Dispel the Myths!

 

Well I do like to read. Sooo..... The JCW reduction pulley is 14.3 or 14.4 depending on who you ask? And all those folks who have the JCW kit thinking the reduction was 13.8 and installaing a 15% in reality only got .6 or .7 further reduction. How much seat of the pants can you feel with that?:smile:

 

thank you for sharing this information with us it seems to me this is the first set of dyno numbers for the 210hp jcw car posted on this site. it's also interesting to compare it to the chart given for the nicely modified mini (chris).

 

No a few others have been posted as well. Most recently gbmini posted his numbers and compared it to a nicely modded mini at the same time. The modded one gave slightly higher hp numbers while the JCW gave better mid range numbers. The graphs look almost identical to these. In the ones posted above the JCW 210 made quite a bit more in the mid range than the modded one. This goes in line with the feel that many people have with the JCW. I would say that two different runs by different cars on different dynos against similiar modded minis, both showing better mid range numbers for the JCW is starting to build a case.

 

dgszwada1

i missed the other post then, what i found interesting here is that while everyone is talking about hp no one mentions torque numbers here and the works car is producing 10lbs more torque, maybe this is why the car feels more refined and "factory like" when compared to the tuned mini.

 

Miniaq,

Here is the link from gbmini's weblog (http://www.gbmini.net/mtblog/archive/000469.shtml)

I agree. First peak numbers don't mean as much as mid-range numbers, in my opinion. The JCW's rev limiter is still at stock, when aftermarket setups usually have anywhere from 7200rpm-7500rpm rev limits. This can easily add 5-10hp, especially since a well modded Mini's hp curve is still near linear and climbing at redline. I also agree that no one looks at torque numbers. Both the numbers above and on gbmini's site show some pretty good torque numbers, and that is going to give a good feel to the car. This is not to say that you can't exceed the JCW with good aftermarket mods, but it does say something to people who sometimes criticize the JCW as being weak. Some JCW's show some weak numbers. I do not know why, but on Mini2 where more people have JCW kits, it has been mentioned quite a few times that some JCW kits are not setup right, and some people have even found leaks in their setups, so that may be attributable to it. Not sure.