Re: Straight through mufflers
Posted: Fri Jun 26, 2020 6:20 pm
Ya, I don’t like it eitherSpeierRacingHeads wrote: ↑Fri Jun 26, 2020 10:04 am 17225 Dynomax straight through. Not sure I like it.
Home of Racing's Best and Brightest
https://www.speed-talk.com/forum/
Ya, I don’t like it eitherSpeierRacingHeads wrote: ↑Fri Jun 26, 2020 10:04 am 17225 Dynomax straight through. Not sure I like it.
You wouldn't want to run Bonneville with one. Aluminum melts at ~ 1250° F. and loses half its strength by 600°.SpeierRacingHeads wrote: ↑Sat Jun 27, 2020 11:09 am...I'm having a round aluminum muffler made for it...
My parents brand new charger has cats, at least 1 muffler and resonators. The resonators are BIG.
That exhaust system is extremely, nicely fabricated. Are you the fabricator of that? Really cool.ptuomov wrote: ↑Thu Jun 25, 2020 8:26 amMy car went from true separate duals with a single straight thru muffler on both sides to this, also with straight thru mufflers, and the sound improved dramatically despite the pipes being upsized from dual 3" to dual 3.5":
Functionally, it has a Y-pipe that divorces into two legs again, which have (Borla) straight thru mufflers. After the straight-thru mufflers, the divorced pipes are unequal length before they merge again into a (custom) tail pipe-muffler. So the system has two cross-overs and unequal length path between the two, which I am guessing is important for the success.
I think that a "two-crossover" system with an X-pipe, two straight-thru mufflers, unequal pipe lengths routed to one side, and a single tail-pipe muffler merging both pipes is a recipe that might work more generally for any car where it's aesthetically acceptable to have a single tailpipe exiting from one side (looks IMO good on for example pickup trucks). One would have to basically win the lottery to by chance get it fabricated with enough equal length segments for it to drone at any rpm. It will also usually use a lot of the available volume for mufflers which is key to noise suppression.
Nope, I did no fabrication on it. It was all John Kuhn Of Kygn a Performance Technologies. I did participate in the design effort, including estimating the exhaust gas temperature losses and density gains, researching the supersonic blast waves, and simulating the exhaust sound frequencies with Vannik’s software. But is did no fabrication (which is more than coincidentally related to the exhaust looking so good).CGT wrote: ↑Mon Jun 29, 2020 11:53 amThat exhaust system is extremely, nicely fabricated. Are you the fabricator of that? Really cool.ptuomov wrote: ↑Thu Jun 25, 2020 8:26 amMy car went from true separate duals with a single straight thru muffler on both sides to this, also with straight thru mufflers, and the sound improved dramatically despite the pipes being upsized from dual 3" to dual 3.5":
Functionally, it has a Y-pipe that divorces into two legs again, which have (Borla) straight thru mufflers. After the straight-thru mufflers, the divorced pipes are unequal length before they merge again into a (custom) tail pipe-muffler. So the system has two cross-overs and unequal length path between the two, which I am guessing is important for the success.
I think that a "two-crossover" system with an X-pipe, two straight-thru mufflers, unequal pipe lengths routed to one side, and a single tail-pipe muffler merging both pipes is a recipe that might work more generally for any car where it's aesthetically acceptable to have a single tailpipe exiting from one side (looks IMO good on for example pickup trucks). One would have to basically win the lottery to by chance get it fabricated with enough equal length segments for it to drone at any rpm. It will also usually use a lot of the available volume for mufflers which is key to noise suppression.
Yes, bullet style under seats and magna flows in the back. All straigth thru. No backpressure, great sound, but a little loud to cruise imo. Was looking at a bit more muffler under the floor pan.