I just got my JCW conversion done two days ago, and I would like to ask anyone else who has had the conversion done if some things are normal...
- a pronounced cackle/gurgle when switching gears. I never noticed this with the plain S, even though I have seen a lot of comments about the cackle of a regular S. If I switch gears really quickly its not there, but if I am just cruising and switching lazily the cackle/gurgle/burble is very pronounced.
- I also get some slight yo-yo like effect at certain points in the lower end of the rev range. Sometimes in the below 3000 range as I am moving through 1st, but most often at around 3200 when moving through 2nd. If I push things hard I don't notice it, but if I am just accelerating more normally, I notice it every once and a while.
The throttle now is a little twitchy (some may call this responsive!). It seems like I have to adjust and learn the new pedal feel, and some of this might just be the quicker on/off of the available power, but I am wondering if this is normal?
No my car doesn't exhibit any of that behaviour with yo-yo effect, I'd mention it to your dealership. The throttle response is a lot better since having the car done, as you said you might just need to get used to it.
Yes the exhaust will pop, growl and gurgle more so than the stock car when you lift off the throttle after high revs. It's not as much as some of the other aftermarket exhausts but it is still more definite than stock. I do have a 1st to 2nd clunk, but I had that before the conversion as well. It doesn't seem any different to me in terms of loudness. I have been told that it's the gear selection cable and the garage is going to replace it next week during the car's first service.
I don't really have much of any cackle/gurgle as you describe. Yo-yo was there before the JCW and seems to be gone now, or is much less noticeable at least.
This cackle gurgle you describe sounds like it is much too loud than you'd expect. I wonder if they didn't connect a portion of the new exhaust properly or something? You should get it checked out with your FULLY INTACT WARRANTY
Indi/White MCS, rally stripes, driving lights, "Works" kit, Madness intake, ALTA rear sway bar, 17x7 BBS RKs, Dunlop SP Sport 9000s (non-runflat); 03/03 build
If anyone’s exhaust is loud then something is wrong. My first to second gear change is no different than before conversion. I also have never experience any yo yo affect after conversion, just more pulling power as I am supposed to. My question is this to other fellow JCW owners: In all the articles in magazines I have read and watching the on line interview with Mike Cooper, it is said that the gas mileage/ Fuel consumption is virtually the same and might well improve upon normal driving conditions I have not changed my driving habits any since conversion. Post conversion though my fuel MPG has reduced to around 18-20 miles per gallon.When I say I get this mileage it is on the same amount of driving highway/ city percentage that I have allways travelled. I use the highway much more often than city. I woud say 75-80% highway and 20-25% city driving. I have always averaged 25-28 MPG. Now just to clarify I am talking actual MPG not from the on board computer. Where I used to go approx 310 miles to a tank my mileage has decreased by almost 70-80 miles per tank fill-up now. I have all my mileage and receipts for gas dating back to September 02 for work expenses so I know what I was getting before and what it is now. Anyone out there with conversion please respond as I am taking this up with my dealer now. Thanks to all who respond.
Mini makes driving fun. Just like when you first got your permit to drive
Last edited by miniquick; Jul 29th, 2003 at 02:12 AM.
When i first had my MCS coverted, i saw an inprovement in fuel consumption. Now on to my 3rd tank of Optimax, consumption has dwindled worringly low, with the worst being 176 miles from a full tank. This was mainly town driving and i wasnt even giving it any welly!
Since my JCW install in June, there is a definite little yo yo effect that kicks in as one decelarates, such a coming to a stop sign . Car does a gentle little surg/drop when revs come down and may be caused as it comes off the assist from the supercharger. But I may be totally wrong on that assumption.
On acceleration the yo yoing effect I had before the JCW install is pretty much gone.
Any similiar experience on the deaccelaration effect or reasons why would be appreciate.
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