What's the best performance exhaust combo?
02-20-03, 09:24 PM
#1
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What's the best performance exhaust combo?
I'm getting my tax returns back soon and I'm curious to know what the best exhaust combo is. I have an 86 n/a that's streetported. I want something awesome but without making me broke. What mufflers to use, header or not, I need to know. Thanks. -Steve
02-20-03, 11:36 PM
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Sorry guyz, i wasn't giving much detail. I live in an emissions area but I don't care about that, my registration is good for a year. I'm looking for the best power combo. I know that true duals is the best, but it's a little extreme and on the pricey side. I want to know what the best pre-silencer and muffler combo would be. I don't want my 7 sounding like the rediculous rice burners, but I want people to know that there are mods under there. I want a good strong low tone during idle, and then when i really get on it I want some good sound. Maybe this will help you out a little more. Simply put, the best pre-silencer and muffler combo. -Steve
02-20-03, 11:40 PM
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I don't believe a header will make much hp gain, the stock exhaust manifold is not that restrictive. I'll just have 2 1/2" pipe from the manifold to the pre-silencer adn then y-pipe and mufflers. I can think of better ways to spend $150 bucks than on a header.
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02-20-03, 11:43 PM
#8
FC Mobsta
the stock manifold is not that restrictive? maybe im wrong..but the damn thing is a ******* bathtub..somone awhile back posted dyno results with a header..and it did give decent hp gains....your car.
02-20-03, 11:55 PM
#10
READ MY LETTERS "TRUE DUALS" I have used them for about two hours and I am in love. If you idle properly you can hear a hint of a "LOW" rumble and as long as you are not flooring it you don't get that Two-Stroke note. I happen to like that exhaust note. Makes me feel like I am riding a big Bike. I looks awesome and was easy to install even alone. Total time From begining to end was 5 and a half hours with breaks to get some juice and a cookie or two. The setup bolts on wery simply and it even came with a block-off plate to boot. I also Received a nice "Mazdatrix" Sticker
It is worth it.
It is worth it.
02-21-03, 12:01 AM
#14
FC Mobsta
02-21-03, 12:03 AM
#16
FC Mobsta
how can that stock manifold NOT be that restrictive if there showing 28% increase in rear wheel hp. Its obviously not JUST the header alone doing that...the true dual setup as well as piping, mufflers...but it sure plays a damn big part.....
and what do you mean look at it...its not the restrictive....im looking at it now..it looks like a big heavy restrictive piece of ****.....
and what do you mean look at it...its not the restrictive....im looking at it now..it looks like a big heavy restrictive piece of ****.....
02-21-03, 08:57 AM
#20
The stock exhaust manifold is about the worst designed piece of crap ever produced. You could design almost anything else and get better results. You have basically a rectangular box with two holes entering in the side and one leaving out the back. Nothing in there to channel exhaust gasses in the proper direction. They just enter and bounce around until they leave. There is no scavenging benefit from this. It does work to quiet the exhaust though and this was its main design goal. there is more power to be had by replacing the stock manifold then there is in any catback system. I had the true duals once and I personally hated it. I couldn't stand the sound but the car did have much better low end power and got a huge increase in gas mileage. The top end was much better than stock but it wasn't as good as all of the collected systems I've had. True duals is a nice power increase over stock especially on a stock ported motor. The more port overlap an engine has though the less efficiently it works. I now have a streetport with quite a bit of overlap and true duals just doesn't work anymore.
02-21-03, 10:56 AM
#21
Originally posted by rotarygod
The stock exhaust manifold is about the worst designed piece of crap ever produced. You could design almost anything else and get better results. You have basically a rectangular box with two holes entering in the side and one leaving out the back. Nothing in there to channel exhaust gasses in the proper direction. They just enter and bounce around until they leave. There is no scavenging benefit from this. It does work to quiet the exhaust though and this was its main design goal. there is more power to be had by replacing the stock manifold then there is in any catback system. I had the true duals once and I personally hated it. I couldn't stand the sound but the car did have much better low end power and got a huge increase in gas mileage. The top end was much better than stock but it wasn't as good as all of the collected systems I've had. True duals is a nice power increase over stock especially on a stock ported motor. The more port overlap an engine has though the less efficiently it works. I now have a streetport with quite a bit of overlap and true duals just doesn't work anymore.
The stock exhaust manifold is about the worst designed piece of crap ever produced. You could design almost anything else and get better results. You have basically a rectangular box with two holes entering in the side and one leaving out the back. Nothing in there to channel exhaust gasses in the proper direction. They just enter and bounce around until they leave. There is no scavenging benefit from this. It does work to quiet the exhaust though and this was its main design goal. there is more power to be had by replacing the stock manifold then there is in any catback system. I had the true duals once and I personally hated it. I couldn't stand the sound but the car did have much better low end power and got a huge increase in gas mileage. The top end was much better than stock but it wasn't as good as all of the collected systems I've had. True duals is a nice power increase over stock especially on a stock ported motor. The more port overlap an engine has though the less efficiently it works. I now have a streetport with quite a bit of overlap and true duals just doesn't work anymore.
- Header to short collector
- collector to Megaphone
- Megaphone to duals or single?
Does that sounds right?
02-21-03, 11:34 AM
#22
For a stock port rotary the true duals is fantastic. It gives a wonderful horsepower increase as well as better gas mileage due to greater low end power. It just sounds terrible. A streetport that has the intake closed later and the exhaust opening earlier would probably get similar results. My streetport has the intake opening earlier as well and also the exhaust port closing later. This greatly increased port overlap and now a collected system becomes very important. I just removed the Racing Beat streetport long primary system and installed a custom fabbed setup that is a short primary system. It sounds backwards but I wanted to sell the system and I have parts lying around such as a header. The new setup should actually make more power since it is done in a completely different way. The Racing Beat system uses 2" pipes all the way back to the muffler. This makes no sense here but the pipes going into the muffler are 1 3/4". There is no transition to this size either. Just a big airflow restricting lip. I ground this down to a nice transition but there still isn't the flow area I want. Some guys completely refab this section. The 2 pipes then collect to a common 2 1/2" primary just before the entrance to the muffler. My new system uses a short primary system (uner 24" long) which collects into a 2 1/2" collector. It immediately hits a short "megaphone" and expands to 3". From there it runs back all the way to a Warlock muffler. It will be finished later today but judging from all of the different exhaust systems I've had over the years this should work superb! Oh yeah, despite all the bad criticism Pacesetter headers aren't all that bad. They just need a better collector.
02-21-03, 11:43 AM
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so you are saying that on the system that I could order from RB that the pipes are only 2" in diameter? if that's the case i won't order it. I want 2 1/2" pipes throughout the whole system, one pre-silencer, and two mufflers. The header can come a little later. I just want to know what you guyz think the best combo is. -Steve
02-21-03, 11:52 AM
#24
It just sounds terrible.
rotarygod
They do not sound terrible to me. That is a matter of oppinion. You should say that some people think they sound bad, but not make a generalization and say that they sound terrible. By the by do you have them or where have you heard them? If you only saw the vid on the website you have only heard 10% of what the exhaust sounds like. Tantricscorpio I still say go for that used setup I told you about.
rotarygod
They do not sound terrible to me. That is a matter of oppinion. You should say that some people think they sound bad, but not make a generalization and say that they sound terrible. By the by do you have them or where have you heard them? If you only saw the vid on the website you have only heard 10% of what the exhaust sounds like. Tantricscorpio I still say go for that used setup I told you about.
02-21-03, 11:59 AM
#25
The 2 primary header pipes are 2" and this is all you need. There is no point to going larger on the primaries since the exhaust ports in the engine don't even have an area equivalent to this size. After the collector is where you need a larger size. 2 1/2" minimum which is what the Racing Beat system is after it collects. On a 2nd gen after the pipe Y's back off you can go larger if you wish. 2" is stock here but the Racing Beat system is 2 1/8" I believe with a 2 1/2" primary pipe feeding it. Some systems are 2 1/2" after the Y. The Racing Beat system I was talking about is for the 1st gen GSL-SE.
The best combo will be subjective depending on who you talk to. I've had Racing Beat, Dynomax, Brullen, Warlock so I just base what I know from what I've tried instead of what I've read. Others may or may not like what I think works but each engine and port style will require something slightly different. There is nothing wrong about the Racing Beat system. I personally don't like them as I feel their fitment and sound aren't that good. Thats also from my personal experience. There are many guys on here who love their Racing Beat systems. Damn near any catback system will perform as good as any other one provided that the mufflers are of the same style (straight through vs. straight through) but some will be louder and more expensive than others.
The best combo will be subjective depending on who you talk to. I've had Racing Beat, Dynomax, Brullen, Warlock so I just base what I know from what I've tried instead of what I've read. Others may or may not like what I think works but each engine and port style will require something slightly different. There is nothing wrong about the Racing Beat system. I personally don't like them as I feel their fitment and sound aren't that good. Thats also from my personal experience. There are many guys on here who love their Racing Beat systems. Damn near any catback system will perform as good as any other one provided that the mufflers are of the same style (straight through vs. straight through) but some will be louder and more expensive than others.