doctorGolfR
Go Kart Newbie
- Location
- Boston
- Car(s)
- MK VII Golf R
Hmm, I'm not familiar with the bending causing an issue but I wasn't planning on that either way.Thanks, had no idea that was a brand. At that price, the mufflers better have some sort of baffling, but at that size, the effect will be minimal at anything above 2000rpm. I have done a few J pipes, mostly on V8's and the results is a high pitch exhaust note. The drone is caused by low frequencies, so cancelling those frequencies will leave you with a mid-range and above exhaust note. I think the only J pipe exhaust I heard that sounds half ass decent is the MBRP exhaust, and it sounds like utter garbage if you remove the cats. You can try, I think last time I did calculations for this car the length of the pipe was almost 52" long, while in a V8 most of the ones I have done are less than 30".
The thumbnail for the video you posted have a coiled pipe... the "engineers" that suggested J pipes for exhaust strongly suggest not doing that and advise the use of only one 90 degree bend at the most. The more bends you add the less effective the 1/4 wave resonator will be. I think the logic was that it messed with the calculations so you had to lengthen or shorten the pipe to find the right spot for the frequency you want to cancel.
I also haven't heard anyone mention the results of putting a J-pipe on a 4 cylinder leading to a high-pitched exhaust note. Maybe that's a V8 specific thing?
I'll be planning something like this: https://www.vwvortex.com/threads/helmholtz-resonator-created.9278077/?id=9278077
Another member on VWVortex also had great results on his R: https://flic.kr/p/2jnCaf4