2nd Gen JCW Most liked posts in thread: R56 JCW has a different turbo than the MCS?

I just got a tune from Jan of RMW. He said the outside dimensions are the same but the internals are quite different. The results of his tuning a JCW are significantly greater than tuning an MCS primarily because of the difference in the turbo. Took mine from 192 ftlbs of torque at about 2600 rpm to 260 ftlbs. It is now a little monster.

 

I bought a brand new left shoe...very high grip. :ihih:

 

"The Specs
Under the hood, you'll find what is essentially the same 1.6-liter engine that powers the Cooper S—this time with a revised cylinder head, a bigger turbocharger and slightly different intake plumbing. According to Mini, the exhaust valves have a slightly thinner back cut than those of the Cooper S. Subtle though the changes may seem, they're enough to get the car to 60 mph in a claimed 6.2 seconds (6.5 for the four-door Clubman), and to a top speed of 148 mph.

An enlarged catalytic converter and downpipe help evacuate exhaust gases into an aggressive-looking cat-back exhaust. The revised system nets 211 hp at over 6000 rpm, with 198 ft.-lb. of torque available from 1850 to 5600 rpm—not too bad from a mere 1.6 liters. Gas mileage suffers a little bit, but the JCW still offers econobox thrift, at 25 mpg city and 33 mpg highway. That's just 1 mpg less than the 175 hp Cooper S.

The JCW gets all that increased power to the ground by way of a beefier clutch, a slightly modified transmission and BMW's Electronic Differential Lock Control (EDLC). This device slows the spinning wheel(s) through the brakes, like a more refined version of traction control, and sends more power to the wheel with traction. It's a lot like a limited-slip differential, but without the torque-steer."

- Popular Mechanics

Revised Cylinder heads
Larger Turbo
Beefier Clutch
Modified Transmission, Including (EDLC)

Now this might just be a deference in semantics... but I define these as internals. LOL But it's all good.. :wink:

 

That is correct.
You can search here;
RealOEM.com Online BMW Parts Catalog

 

Or you can go here;
Applicability of a turbocharger 5303 988 0118. Selling turbos KKK, Schwitzer, Garrett. Re-manufactured turbochargers.

 

When you go with the dealer installed JCW kit, you don't get everything that comes with the factory installed JCW. Turbo doesn't get changed and well as all of the differences in the head or the manual transmission.

 

The dealer installed JCW "kit" is basically a CAI and exhaust, with re-map of the ECU to accept the new parts.

 

And the kit has to be bought in total, I asked just about the ECU upgrade and had to take the exhaust and Stage 1 Airbox.

They make the disc that the ECU upgrade comes on VIN specific by the by

Think I came out ahead with the route I choose

 

Here is a good reference on what comes with the factory JCW option.

MotoringFile » Archive » MINI John Cooper Works Officially Released

As compared to the dealer installed kit;

MotoringFile » Archive » 2007 JCW Kit Officially Announced

 

Check out 'My Garage'

 

I stuck with the JCW Kit, not that it's the best performance, and certainly isn't the cheapest, but for me warranty was very important, especially since I've had the dread 'cold-start' issue.

 

Wow, amazing.

 

Hummmm, me thinks MM has a tune in his future. :eek6:

Jim

 

I just bought the Flash Tool from RMW so I can change tunes at will. I'll have the current monster tune for the track, a version of this tune with no direct alteration of standard boost levels so I can use it in the STX Class for autocross and an OEM tune.

I have the cold start issue as well but the dealer is going to fix that under warranty as well as the likely fuel pump failure that will soon be upon me. They seem to have fully recognized the timing chain problem.

 

Quit bragging about your monster 260ftlbs of tq when I only have a measly 180..........I'll see you on the track!

 

I have what would be the "aftermarket" equivalent of the JCW kit ... CAI, Magnaflow cat-back w/ resonator delete, and hot side boost tube. I had the cold-start rattle also and had it fixed under warranty w/ no problem. For them to deny you warranty work based on a mod, they have to prove that the mod caused the failure. Even though it was never brought up, IMHO, there's no way that they could prove any of those parts, or pretty much the majority of R56 engine mod parts (boost tubes, tune, cai, downpipe, intercooler, etc.), could cause a leaking/faulty timing chain tensioner.

 

OK....... here's something
Been reading the fine performance book Nathan sent me for finding the "Gold Key"
I always knew the MCS and the factory JCW turbo were different. The book makes mention of up grading the turbo to using the European JCW Challenge turbo. What's up with that? Anyone know the details?