Quad Exhaust Conversion

[ranski]

I think the coupe has the battery in another location? -you really need to relocate the battery to have the additional exhaust on the roadster - just have a peek under the car to see.


Sent from my iPhone using Tapatalk

[gannet]

I think the coupe has the battery in another location? -you really need to relocate the battery to have the additional exhaust on the roadster - just have a peek under the car to see.


Sent from my iPhone using Tapatalk

only the M's have the battery moved into the boot rather than underneath it.. for the exhaust box

[koolchris99]

The bumper i believe has a cutting guide on it already so it would be a simple job for them..

The Eisenmann system is 1300 IRIC

A Cutting guide? Is this true? I was contemplating a quad conversion bur thought I would have to go down the M rear bumper route to do it?

Well your only cuttin the rear valance, not exactly much,.

[ranski]

Yes as pawn didnt relocate his (image below) - anyway, ill give longlife exhausts in Birmingham a call and see what they have to say as MIJ Performance in Walsall said the battery had to be relocated

[cj10jeeper]

There are 2 basic ways to do a quad system:

1) Move the battey box and the petrol fume filter and then work new pipes in from somewhere behind the cats. Fit a crossover if you really want one. Probably the purest way to do it, but a lot of work.

2) take a T from the LHS backbox, or from one of the pipes feeding the single backbox. Run that pipework inside the rear bumper cover and with either a bend or collector box exit it to the RHS with a twin tip.

Most pre made systems like the one pictured above do the latter.

Ranski - email sent to you this afternoon, but looks like you skipped work

[ranski]

just picked it up Phil, thanks for this, ill have a think on what to do

[Exactmax]

So what would be the disadvantages of just having a T off the left hand side back box? I don't mind the bumper being cut to accommodate the new pipes (just gives me an excuse to save up and buy an M rear bumper).

What would be really good is if someone can recommend a company based nearish London. Recommendations are always better than just ringing some company up...

[koolchris99]

with a T it's pretty much pure cosmetics, you can see it's not exactly the easiest path for gasses to escape, I'd be inclined to say that increases pressure.

[PawnSacrifice]

with a T it's pretty much pure cosmetics, you can see it's not exactly the easiest path for gasses to escape, I'd be inclined to say that increases pressure.

I doubt it - has had zero affect on the performance of my car.

The main concern with the t-pipe is the condensation in cold weather. At start up it favours the left, evens out and then favours the right side (as the left reaches temp and stops condensation). There is a clip on my YouTube channel. Frankly though, I love the sound of my system so much I couldn't care less. In fact, if cost were an issue I'd take the twin box over another quad system. It may not be to everyone's taste, but I absolutely frickin' love it! As ga41 told me, 2.5l cars just don't sound like that

ranski, not sure where you got that image from, but later in the thread I originally posted it in there are details of the bumper modification. The company fitting it made a real mess of the job so I decided to do it myself. The cut out is easy really - just measure and measure again. The rolled under section requires a little more work, but nothing drastic - and again the key is to check your measurements time and time again until you're completely sure. Here's the link:
Pre-facelift rear bumper quad exhaust conversion

[JOE90]

Hmm I wanna get one now , question.I have though, having the quad fitted, will it attract more buyers when I sell it or will it put buyers off ? This place is only round the corner from me , so I might just do it.

http://www.mstyle.co.uk/acatalog/BMW_Z_ ... Style.html

[Exactmax]

Thats the system that I quite fancy - I just need to find someone that has a soundclip of the system as I can't really remember how it sounds.... Any help anyone?

[cj10jeeper]

Thats the system that I quite fancy - I just need to find someone that has a soundclip of the system as I can't really remember how it sounds.... Any help anyone?

Interesting to see that the picture in the mstyle advert shows the same cf diffuser as I fitted and converted to dual exit. Must have been a good idea I had

Shame that part is no longer a BMW stock part as it really finishes the conversion with style

[PawnSacrifice]

Exactmax, not seen or found anyone on here with the M-Style setup - not come up in any of the discussions or in any of my searches - you'll need to Google this one. Otherwise, give M-Style a call, tell them you're interested and see if they'll contact a previous customer and see if they'll be a reference for you. No harm in asking.

[Exactmax]

Very true PawnScarifice - thanks for the tipoff!!! Its tricky though as Msytle are helpful one day and then just don't want to know another. I will try giving them a call and asking

[ranski]

Well i've got mine booked in for the 24th to get the conversion done -

Im using http://www.roarpower.co.uk (birmingham) I popped down there the other day and spoke to Steve Barby about the options available, obviously he pointed out straight away that the battery would be the main problem. any how he said he would do some research and get back to me, which he did today.

Quite funny he mentionedthat they have recieved 3 other requests from Z4 owners in the past few weeks (this forum?) Once its fitted ill get some pictures up, although i wont get it back until the 26th as they said as its the first one they have done they want to spend more time on it, which is ok with me

PS they are going to work around the battery - Can anyone confirm if the inside of the standard Z4 bumper has etchings where the 2nd exhaust cut out should be?