The Group4Autosport Progress Thread

I talked to the guys at Group4 today... great bunch of guys. They're serious about selling a good product and I'd love to have one of their diffusers.

However, after talking to Mark today, it appears that not only will I have to cut the rear factory diffuser (piece of crap filler panel) but I'll have to cut into the bumper sideways approx. 4" on each side to make it fit.

Now, I do plan on keeping the car and being in the bodyshop business, I have no problem doing the install... what I do have a problem with is cutting into perfectly virgin plastic. There's something that I find myself fighting with myself about and I just don't want to do it.

I know M7's unit utilizes the factory width of the factory diffuser but I don't like the look of theirs. (unless I could shorten it a bit... it might look like it didn't come right off a race car)

Decisions, decisions....

I'm wondering if I could buy group4's unit and narrow it myself. I'll call Mark tomorrow and discuss the possibility.

We'll sleep on it...


Mark

 

If you ever plan to sell the car you could undo any clearing you have to do to the bumper, could be done for less then $150. (used bumper and some paint)

IMO $150 which you may or may not have to spend is worth it for a product that has been tested as much as this one.



Really looking forward to the release of that wing....it be so purty.

 

I installed a Group 4 diffuser on my GP and had to cut into the rear facia, but not high enough to go into the bumper material. But, the piece I cut into was an insert between the side moldings for the wheel wells and was easily wider than the diffuser itself. I plan to keep my GP for as long as humanly possible, and will slowly become a track specific machine. Though, if I ever want to return the rear facia to stock the piece that was cut into is relatively cheap (for a BMW part) and easy to replace.

 

If you do decide to do it can I come by your shop and watch?

 

Soooo for people with a r53 Aero Rear bumper, there will be LOTs of cutting involved ? Anyway to maybe integrate it into the recessed areas w/ the stickers faking holes ?

 

To allow the diffuser to work effectively the air from under the car needs to exit at an upward angle. This seems to be not much of a problem for most. The width of the diffuser, to fit without cutting into the facia of aero bumper facias, is under discussion and testing. This might work for daily drivers that are tracked. We will keep you informed as to our results.

Getting feed-back like this is one thing that keeps us improving or modifying our aero aids, THANK YOU :idea:

Mark

 

That may be so for an MCs but I assure you, you will never find a jcw aerobat bumper for that price.

Not to mention, at my cost being in the bodyshop business, id be hard pressed at getting out for materials for 150 bucks.

 

how about finding a used MCS bumper cover to cut up and fit the diffuser while keeping your jcw bumper intact?

 

That's actually not a bad idea n

Good thought.


Mark

 

Here is a video of my group4 rear diffuser and splitter on my 2009 MCS ..it was installed at MITM 2010 by my wonderful husband and group4 guys! sorry for the bouncy camera work, my son was trying to put a giant grasshopper on my shoulder !! plus, my dirty mini!! [ame=http://www.youtube.com/watch?v=kKustvJHsFw]YouTube - Mini Cooper rear Diffuser and splitter[/ame]

[ame]http://www.youtube.com/watch?v=fTtTbOdPkKc[/ame] Here is a different video with a tripod for steady video!! Plus, More Drum music!!!!

 

THAT'S HOT!!!!!!!!!!!!

that is what a real diffuser looks like

very nice

 

Speaking of which....

Mark, WHERE IS MY DIFFUSER??

The front end of my car is wrecked, not the back end!!!

I'll have the front end of my car back together before the diffuser gets here...

:lol:

Call me and let me know... I accidently deleted all your numbers.


Thanks,

Mark

 

I understand UPS is now using the Pony Express down your way :devil:

Mark

 

Mark, how is Joel making out with the wings?

Jim

 

Check out the new pictures on our web site

Mark

TEEEESER

 

Looks like it is moving along very nicely. Thanks for the sneek peek.

Jim

 

Once we get the road and track R&D results and probably some tweeks it will be ready for the market

You know us, it has to function first.

Mark

 

I would not want it any other way. Just remember to make it fit the "justa" too.

Jim

 

Any news on the exhaust?

 

I know you want a "quiet" one and I think we might be there. Even the Borla, Alta, etc. are not quiet or "sleeper" exhausts. There's a line you have to cross to get the power out of the exhaust.

My new '03 came with a twin can Borla race system on it. Leon and I swapped exhaust (he had our's) to check the difference. The noise was really close to equal, but the power he lost and I gained was very noticable

The major response we have gotten from testers is "HOLLY S**T" and everywhere I go people love the twin 3" tips.

Hope this helps,

Mark