Manufacturing a "Quiet" 3insingle exit exhaust
Manufacturing a "Quiet" 3insingle exit exhaust
im on a quest to come up with a custom exhaust that will be super quiet, quieter than even stock systems.
now, with that said, i know its going to be difficult since im looking for a hi flow 3in turbo back... i already have a custom 3inch one that consists of a 3in Racing Beat Down pipe, to a hiflow cat(which will either be swapped for a new one or just throw out period) to a no name N1 style muffler(rice). Now, i do want to include a presilencer that Racing beat has a universal 3in version, that i will be purchasing soon. RB also offers a universal 3" muffler as well that i may be purchasing...however i have grown to love the dumpy style mufflers and would love to have one.... i dont know if these turn down muffler provide the stealth that im looking for...i was also thinking of buying both RB products and adding a dump tip to the muffler but i cant even find a muffler with one!
any ideas guys?
now, with that said, i know its going to be difficult since im looking for a hi flow 3in turbo back... i already have a custom 3inch one that consists of a 3in Racing Beat Down pipe, to a hiflow cat(which will either be swapped for a new one or just throw out period) to a no name N1 style muffler(rice). Now, i do want to include a presilencer that Racing beat has a universal 3in version, that i will be purchasing soon. RB also offers a universal 3" muffler as well that i may be purchasing...however i have grown to love the dumpy style mufflers and would love to have one.... i dont know if these turn down muffler provide the stealth that im looking for...i was also thinking of buying both RB products and adding a dump tip to the muffler but i cant even find a muffler with one!
any ideas guys?
Joined: Mar 2001
Posts: 31,835
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From: https://www2.mazda.com/en/100th/
+1 the stock exhaust was really quiet
for a +2, its tough to beat the full RB revII system, but i have done a few cars where we used the rev II downpipe and presilencer, but then ran a 3" single with your choice of rear muffler. the presilencer works well and basically the rear muffler becomes the tone control.
we did one with a borla that sounded great, and an HKS carbon TI, that looked cool, but its a little bassy for my taste.
for a +2, its tough to beat the full RB revII system, but i have done a few cars where we used the rev II downpipe and presilencer, but then ran a 3" single with your choice of rear muffler. the presilencer works well and basically the rear muffler becomes the tone control.
we did one with a borla that sounded great, and an HKS carbon TI, that looked cool, but its a little bassy for my taste.
lol i figured id get the stock exhaust runaround... id love to keep it stock but unfortunately i think it will cause flow issues with the 750/1000cc injector set up....but i will definatly look into the hushpower exhaust, those are manufactured for diesel engines tho.... i think the racing beat will suffice....any other components or any luck with other mufflers?
Joined: Mar 2001
Posts: 31,835
Likes: 3,233
From: https://www2.mazda.com/en/100th/
the key is the rb center muffler. http://www.racingbeat.com/RX7-1986-1...ms/16425P.html
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the key is the rb center muffler. http://www.racingbeat.com/RX7-1986-1...ms/16425P.html
+1 the stock exhaust was really quiet
for a +2, its tough to beat the full RB revII system, but i have done a few cars where we used the rev II downpipe and presilencer, but then ran a 3" single with your choice of rear muffler. the presilencer works well and basically the rear muffler becomes the tone control.
we did one with a borla that sounded great, and an HKS carbon TI, that looked cool, but its a little bassy for my taste.
for a +2, its tough to beat the full RB revII system, but i have done a few cars where we used the rev II downpipe and presilencer, but then ran a 3" single with your choice of rear muffler. the presilencer works well and basically the rear muffler becomes the tone control.
we did one with a borla that sounded great, and an HKS carbon TI, that looked cool, but its a little bassy for my taste.
http://www.youtube.com/watch?v=Zd4e8htvEfc
http://www.youtube.com/watch?v=BJnDCoJzaD0
should have asked me.
i have run my stock Turbo II series 5 catback versus the 3" single i have on my car currently and the power difference was almost unnoticable at ~350 whp. with a borla XR1 in place of the main cat it would be as quiet if not quieter than stock and still be free flowing.
i switch them out when i get bored of the droning sound from the single. my single SSautochrome catback has an XR1 placed between the pre-silencer and the muffler which is why it sounds reasonable. that gets omitted when i put the stock catback on and it's still quieter than the single.
i have run my stock Turbo II series 5 catback versus the 3" single i have on my car currently and the power difference was almost unnoticable at ~350 whp. with a borla XR1 in place of the main cat it would be as quiet if not quieter than stock and still be free flowing.
i switch them out when i get bored of the droning sound from the single. my single SSautochrome catback has an XR1 placed between the pre-silencer and the muffler which is why it sounds reasonable. that gets omitted when i put the stock catback on and it's still quieter than the single.
Last edited by RotaryEvolution; Oct 25, 2011 at 04:51 PM.
I would look into building a capped helmholtz camber. Look on camaro site or G8 site. The "SOLO" exhaust is basically a helmholtz type setup.
Our main problem is drone at highway speeds (if you ask me). Design the proper length chamber and it will cancel that frequency.
I made one for the wife's g8 and it worked, just haven't gotten around to making one for the 7
Our main problem is drone at highway speeds (if you ask me). Design the proper length chamber and it will cancel that frequency.
I made one for the wife's g8 and it worked, just haven't gotten around to making one for the 7
Joined: Oct 2003
Posts: 1,600
Likes: 49
From: Norcal/Bay Area, CA
Joined: Oct 2003
Posts: 1,600
Likes: 49
From: Norcal/Bay Area, CA
Here is that hushpower pro series on a 13B by itself, im sure with a presilencer it will tone down alot.
http://s282.photobucket.com/albums/k...t=M2U00434.mp4
another note, external wastegate, and may have a presilencer already... lol
http://s282.photobucket.com/albums/k...t=M2U00434.mp4
another note, external wastegate, and may have a presilencer already... lol
Last edited by lim_fc3c; Nov 4, 2011 at 03:53 PM.
I would love to put back a stock exhaust as mega power is not my goal. But everyone has certainly thrown them out by now... or wouldn't bother to ship if they had it. Oh well, going to throw together a "new" exhaust soon enough.