Bike exhaust

[voucht]

Thanks for that Kev. Yep, good tip about the deflector at the rear, I'll do that at the end, thanks.

When in comes to the inlet, I think I will remove the small elbow, and have the tube from the exhaust directly welded on it. I just have to figure out the different angles and have the stainless steel tube bent/weld by someone who has the facility to weld stainless steel (I don't and I won't).

So, the muffler will be mounted on a rubber mount from underneath (I'll use a small 90° bracket on the original clamp mounting point, the horizontal part of the bracket will seat on the top of a rubber mount, which will be bolted on a tab welded under the chassis). But do I need another "soft" point between my manifold and the muffler, or can the line be solid all the way? Does the pipe from the manifold to the muffler need to be supported too, or 1 mounting point on the muffler is enough?

Thanks.

[K4KEV]

I would certainly go for two mounting places.....the other one I would put where ever it is the most convenient/easy to do.

[jason 82]

Do the cars pass the emissions with the cat built in on the motorbike exhaust then ? I have a 1996 mx5 donor, so my car would require a cat, but the systems suitable on a. 7 is basically a straight through, so I just wasn't sure if a bike can is used, how iva & mot friendly the bike cans are ? I know that they will definitely be louder, but will they fail the tests ?

[voucht]

Jason,
I have no idea about that. I thought about it, and it is a bet. The can is from a modern motorbike (K13000R from 2010), so I hope it will pass the emission test here is in Sweden with my 2.0i DOHC, but can't be sure 100%.

[voucht]

I bought some stainless steel tubes and elbow and got them TIG welded by a professional welder.

I turned the clamp around and re-shaped it to have the muffler hanging, I think it is much better than my first idea.

Here are the pictures of the exhaust mounted on the Roadster. I think it looks pretty cool.


2013-12-04_14-38-14 par Voucht71, sur Flickr


2013-12-04_14-38-43 par Voucht71, sur Flickr


2013-12-04_14-44-27 par Voucht71, sur Flickr

I might add another lower mounting point on the lower part of the muffler, I asked the welder to weld a bracket on the clamp for that, which he did.

Now, the surprise will be at the MOT (when the car is finished). Will the exhaust pass the noise and emissions test? Anyway, for now, I started the engine with the exhaust line fitted, and here is how it sounds and look when running:

http://www.youtube.com/watch?v=Y2VpdHpMDG0

One more time, Kev was right, I will need a deflector at the end of the muffler to protect the rear arch... I have my idea about that to make it look not too ugly...

To be continued...

[ayjay]

sounds great

[K4KEV]

Tell you what mate ...that sound effin bluddy good especially the the growl on the back pressure, if you are concerned about too much noise then fabricate a decibel killer to go in the end of the can
That was a good price for quality looking welds... you are cracking on bud, keep it up and you will be on the rod for next year easily

[jason 82]

Sounds lovely just as the revs are dying down at the end, really tidy. I have bought a k&n 57i kit for my mx5, going for induction roar, rather than exhaust tone. I don't trust matey with the decibel machine.