JCW exhaust Size
#5
Well, the JCW exhaust runs about 3.75 PSI backpressure...the stock runs 2.5 PSI for reference.
Those numbers were taken from a thread on exhausts over on Mini2. I can pull up the thread itself if need be, but I am lazy and tired right now and don't feel like it.
- Matt
- Edit -
De-lazied myself and found it here: http://www.mini2.com/forum/engine-dr...g-results.html
#6
Lots of good info here about stock JCW vs. ALTA.
https://www.northamericanmotoring.co....php?p=1835576
It uses 2.25” diameter tubing, and were it splits into 2 mufflers it goes to 1.3” tubing. The ALTA exhaust uses 2.5” plumbing through out with no split. So bigger should make more power?? The weight of the JCW system was 40.8lbs, were as the ALTA system is 28.0 lbs. So our save a bit of weight over the JCW, which you would expect with the single sided system. So onto the dyno test. This test was also done back to back, and the car was left on the dyno between run sets.
This image has been resized. Click this bar to view the full image. The original image is sized 1024x768.
https://www.northamericanmotoring.co....php?p=1835576
It uses 2.25” diameter tubing, and were it splits into 2 mufflers it goes to 1.3” tubing. The ALTA exhaust uses 2.5” plumbing through out with no split. So bigger should make more power?? The weight of the JCW system was 40.8lbs, were as the ALTA system is 28.0 lbs. So our save a bit of weight over the JCW, which you would expect with the single sided system. So onto the dyno test. This test was also done back to back, and the car was left on the dyno between run sets.
This image has been resized. Click this bar to view the full image. The original image is sized 1024x768.
#7
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