Hey guys, did a custom 3" exhaust, vibrant muffler, ss pipe and vband clamps. What do you guys think?


All tig welded at 65amps

 

Sweet let's hear it, didn't know you could do a straight through on the r53

 

Lol... You cant

 

Didn't want to give too much away, but since you asked you shall receive.

 

Guess I should've posted this with it :smile:

 

Guess there's a bit more going on here.

 

Oh yes, you can certainly do a straight-back on an R53, and without removing the battery box, just go right under it (yes there's room, even on a mildly lowered car). I know, I've done 14 of them, in multiple muffler/resonator/glasspack configurations. You'll find an honest >10 HP if you do it right.

Unfortunately, without a turbo chopping those exhaust pulses into tiny bits, it'll still be CRAZY loud.

Which is why I now run a JCW exhaust.

 

No real experience with a 3" exhaust on a mini......but I would think that with an exhaust using that size pipe, you would be loosing enough back pressure on the low end to kill a bunch of torque...something you don't want on a street car. There are V8 cars out there making 400+ hp with a single 3" exhaust.....not really sure an inline 4cyl min making 200 +/- hp will really benefit from that......

If 3" pipe was the ticket for huge HP gains......all the aftermarket places would be making them that big.....

From the picture...it looks like you are running a turbo? More info?

 

Fixed. /grammar OCD...

Anyway, it doesn't matter with a turbo. You want as big an exhaust as you can after the turbo. The less pressure on the exhaust side of the turbo, the greater the pressure drop across the turbine and the more energy you can extract from the exhaust stream.

James

 

Sure...that makes sense. Wrote that before I noticed the turbo in the picture. Can you give some more info on the turbo/setup?

 

This is actually our shop car, we're a small independent MINI/BMW shop in indian trail,NC called Kinetech Motor Werkes. I really don't want to put to many details out, seeing how it's still a work in progress. Here are some more photos though.

 

I was gunna say in that vid that isn't a normal sounding exhaust.... and you showed me alright.... helps when there is a k04(I assume) size turbine spinning

 

Do I spy an external wastegate?

 

Its a 3071… and yes, turbosmart external wastegate, with a custom open dump.

 

Here is a close-up of how the muffler sits, battery box has been removed.

Flagged V band weld

TURBOOOOOOO!!!

 

Purdy! do I spy a w2a?