Rear end Quad Conversion Progress.

[cj10jeeper]

Neat installation, but not convinced they look quite right. To me they detract from the great shut lines that come down the bonnet/light and up the brake vent in the bumper. The widened 'X' shape.

As always each to their own and I'm sure I'll be in the minority.

 

[jakblade]

Continuing with rear end enhancements. Need a Quad zorst to go with modded bumper....and so it begins....

Start with one of these..........


And chop the top off....what do you find??? Not a lot!!!! Not what I was expecting.......




Going to attempt to turn the bottom pipe in the last pic to the left and exit it out of the side of box. Then take it across behind bumper to a twin outlet......just need to source some stainless pipe now...

Hhmm,Hhmm. As the mighty MM has pointed out to me my initial plan may cause some unwanted noise/backpressure issues so a re-think is called for. Another plan filed under b1n..... :?

 

[hopz121]

Jakblade a few questions for you mate.

Did you fit any of the airduct brackets or a new m undertray for the install?

Does the bumper flex a lot of not?

Do you have any pictures underneath where the bumper meets the old undertray?

Thanks

Ash

 

[cj10jeeper]

Continuing with rear end enhancements. Need a Quad zorst to go with modded bumper....and so it begins....



Going to attempt to turn the bottom pipe in the last pic to the left and exit it out of the side of box. Then take it across behind bumper to a twin outlet......just need to source some stainless pipe now...

Hhmm,Hhmm. As the mighty MM has pointed out to me my initial plan may cause some unwanted noise/backpressure issues so a re-think is called for. Another plan filed under b1n..... :?

Glad you've had a rethink on the backbox. I was worried that simply turning one pipe and exiting the right hand side would create one pipe some 1-2m longer and invariable increase in pressure, probably exhaust note change and maybe even decreased performance.

It's for these reasons I went custom pipework from mid car to twin boxes at the rear, creating the right note and no change in performance.

 

[jakblade]

Continuing with rear end enhancements. Need a Quad zorst to go with modded bumper....and so it begins....



Going to attempt to turn the bottom pipe in the last pic to the left and exit it out of the side of box. Then take it across behind bumper to a twin outlet......just need to source some stainless pipe now...

Hhmm,Hhmm. As the mighty MM has pointed out to me my initial plan may cause some unwanted noise/backpressure issues so a re-think is called for. Another plan filed under b1n..... :?

Glad you've had a rethink on the backbox. I was worried that simply turning one pipe and exiting the right hand side would create one pipe some 1-2m longer and invariable increase in pressure, probably exhaust note change and maybe even decreased performance.

It's for these reasons I went custom pipework from mid car to twin boxes at the rear, creating the right note and no change in performance.

After some re-thinking and discussion with MM decided that this is probably the way to go..........

 

[jakblade]

Jakblade a few questions for you mate.

Did you fit any of the airduct brackets or a new m undertray for the install?

Does the bumper flex a lot of not?

Do you have any pictures underneath where the bumper meets the old undertray?

Thanks

Ash

Now then Ash, No I didn't fit any airduct brackets but still to do is to put the ducting actually on to the brakes, so will probably just mount to the wheelarch liner.

the bumper doesn't appear to flex too much and at the moment I only have some temporary fixings to the original undertray. This will be resolved once I have finished the centre piece splitter, which will sit just a little bit higher than the protruding fang protectors and attach to bumper and pick up existing undertray mounts....

No pics as yet, waiting until the splitter is complete.

 

[cj10jeeper]

Continuing with rear end enhancements. Need a Quad zorst to go with modded bumper....and so it begins....



Going to attempt to turn the bottom pipe in the last pic to the left and exit it out of the side of box. Then take it across behind bumper to a twin outlet......just need to source some stainless pipe now...

Hhmm,Hhmm. As the mighty MM has pointed out to me my initial plan may cause some unwanted noise/backpressure issues so a re-think is called for. Another plan filed under b1n..... :?

Glad you've had a rethink on the backbox. I was worried that simply turning one pipe and exiting the right hand side would create one pipe some 1-2m longer and invariable increase in pressure, probably exhaust note change and maybe even decreased performance.

It's for these reasons I went custom pipework from mid car to twin boxes at the rear, creating the right note and no change in performance.

After some re-thinking and discussion with MM decided that this is probably the way to go..........

That looks much better as you're just adding an extra exit to the backbox, rather than diverting 50% of the flow along a new pipe. Hope all the exhaust doesn't choose to follow the original route.

Call me pedantic on this but I want all 4 pipes to steam equally on a cold day.
Of course you can always go back and partially restrict one of the original exits..

 

[jakblade]

Just a little update... Mocked a few parts together for the quad exhaust now all my parcels have arrived. Probability of some adjusts need for the finished article but you get the idea.........I think......

 

[Steve84N]

That's quite clearly not going to work as the original tips stop at the edge of the table and the new ones don't even start until well beyond it... Looks like you need to take a feed from the side of the box rather than the back.

 

[jakblade]

That's quite clearly not going to work as the original tips stop at the edge of the table and the new ones don't even start until well beyond it... Looks like you need to take a feed from the side of the box rather than the back.

Point taken. That's why I mentioned some final adjustments necessary. Just got excited with all the new bits and wanted to see how they would fit together. Got some more bends coming to allow me to put a set in the straight pipe to gain the room needed...hopefully.

Just waiting for the weather to turn really crap so I can remove the rear off the zed and get existing box chopped off and start a dry fit to see how stuff fits on the car........Wish me luck.....

 

[Yorkie Z]

What's your plans to improve the sound. That's just going to sound stock as it is..??

I joined the pipes up inside my back box

http://www.z4-forum.com/forum/viewtopic.php?f=2&t=62691&p=999219&hilit=3.0+exhaust+finally+a+good+sound#p999219

 

[Steve84N]

An angle in the pipe might give you the room as long as there's clearance under the car. Fair play for doing it yourself and good luck.

 

[jakblade]

What's your plans to improve the sound. That's just going to sound stock as it is..??

I joined the pipes up inside my back box

http://www.z4-forum.com/forum/viewtopic.php?f=2&t=62691&p=999219&hilit=3.0+exhaust+finally+a+good+sound#p999219

Thanks for that Yorkie. Just read your thread, lots of info in there. I just wanted a quad set-up and if I freed up any noise...bonus. But you have me thinking now.....mainly how to make a 2 into 3 inside the box????

 

[spic]

How did you get on and how did it end up ???

 

[jakblade]

How did you get on and how did it end up ???

Not done yet. Been waiting for it to warm up a bit my workshop is like a bleedin fridge in winter.
Progress is about to continue shortly so updates will be forthcoming.

 

[jakblade]

Just a little update. Rear bumper almost done/prepped ready for spraying. Just a little fettling final wet n dry and all ready for spraying.

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[JINGLE]

looks good! what sort of quad set up u going for?

 

[Marlon]

That rear is looking good bud - hope you can find a body sprayer that will do it justice

 

[ba3bas]

Love the bumper, wish I had the balls and or time to do the same but thinking of getting the m

Does anyone know if the exhaust spacing matches from non m to m

I already have a quad that's spaced to be identical so would the m bumper fit over ?

 

[jakblade]

looks good! what sort of quad set up u going for?

Cheers Jingle. Going to be homemade. 3rd 2" pipe out of standard box across behind bumper and twin exit.