Hi all, i am redoin my 84 GSL-Se this winter and imma be getting a new exhaust i think. I was gonna get the RB exhaust system, but its al il expensive so i decided id buy the header and presilencer, make my own straightpipe back and buy a new muffler. Do any of you know of any cheaper headers, that will still allow the rb presilencer to be mounted up? Also do any of u know any good mufflers. Also on my engine and exhaust currently my backpressure pickup tube isnt hooked up, where does this tube enter the engine so i can try and reinstall it

 

You definately want to buy the RB header. The only other mainstream option is Paceshitter, and I think that the nickname says it all. Personally, I've decided to go with a Magnaflow muffler, but I haven't got it yet, so I can't comment on what they're like just yet. Stay tuned.

 

if ur gonna run a straight line i dont really see any point in buying the RB presilencer....theres a few header choices u have:
Monza header (6hp gain according to victoria british)
Pacesetter header
Mindtrain Header (sold by kickyride.com)
SDJ Motorsports Header
Selectmaz Header (australia)


when buying a muffle make sure u get one with nice thick steel....so that it can resist the heat put out by a rotary.

 

http://www.headersbyed.com/bildbetr.htm

http://e30m3performance.com/installs...haust/exh1.htm

http://www.carcraft.com/howto/0304_head/

Heres some links for your header problem, save yourself some money.

 

has anyone tried the flowmaster 40 series muffler....im looking into getting that one.

 

Yes... i think you PMed me... like i said... i love teh sound, but i don't have a header on my car yet, so i can't tell you whether the good sound will turn to **** or not with a header. Right now, i love it because it is a very distinct rich sound. Not farty and ricey. That is why i bought the flowmaster in the first place. Plus it looks stock so if you aren't revven ur car up, cops can't tell teh diff.

 

nope never pm'd u....dint even know u had the flowmaster....but thats one thing i've noticed about flowmaster mufflers....they give the exhaust a rich sound

 

Im pretty sure the pacesetter header cost the same as the racing beat, no need to get the pace setter.

but you post does let me know I am on the right path with designing my budget headers, they will be made from standard exhaust tubing so they will cost half as much as the competitor, be ultra light for racing, but will also not last nearly as long.

click my sig to see all current and future projects

 

I have had a RB header on one of my RX7s for 17 years. The whole exhaust is RB except the rear pipe which is stock Mazda. I know this system is expensive. But it last I hate crawal under the car. My other 7 has had a similiar exhaust sysem for 5 years. none of the parts have ever failed. Spend your money wisely. cutting corners will get you more work. My exhaust systems sound very fine a deep roaring rumble. The only draw back is that the RB presilencer is difficult to remove after about two years of use without breaking the studs off my recomendation is don't try to turn the bolts cut the bolts off save the studs.

 

nice to see another member from MI

welcome

 

the thing im afraid of about getting the RB exhaust is taht since there would be no cats that my exhaust would be horrible, and im quite often surrounded by other cars, cops to, at my school.

 

Mazdatrix sells a cat that bolt right up to the RB header, which they also sell.

www.mazdatrix.com

 

flowmasters suck. they are extremly poor flowing on our rotarys and have been known to produce some of the worst exhuast note on them as well as a drop in power. the design does not work on smoke rings. thats what our engines blow making them realy a flow preventer. there use to be a disclamer on their web site regarding the use of them on rotary engines.

 

thanx for the info kuhlrx7....so im guessing something with a straight flowing design would be best....ryte?

 

dont worry about that, on my first gen I have the rb header, mini pre-silencer "not the regular size one", and a straight through dual outlet dtm muffler.

its really not loud at idle, it doesnt get loud until you step on it, so as long as your not putting the pedal to the floor around cops you shouldnt have any problems.

and damn I am seeing alot of members from MI lately

 

Well, with a streetport and bonestock, out-of-tune-gas-leaking-at-the-base Nikki, they still allow a 12A to generate 135 HP at the wheel, so it can't be all that bad,,,and that's with two flowmasters out back, stacked side by side....and real world experience says the part about the exhaust note is simply not true...

 

what im afraid of about the cops thou is them noticing my exhaust smelling horrible and making people intoxicated from thge fumes

 

mar3 try one flowmaster and see. my real world experance says it is. but sound is a personal preferance. I do not like the high tin can pinging sound that I experanced at anything above idle. I also did not like the drone it produced. I also experanced lower power output. that was an item that flowmaster disclosed in the past. I was told it was not true then also and the muffler was cheep so I tryed it. It turned out to be true for me and also many others I have met since that have used them. have you tryed a through style to see if there was a differance? there have been some test by auto speed a while back that proved this ( about 4-5 years ago) would that be real world also?there have been other test also. but sometimes its good to try it out for yourself. in my personal experance it proved to have a negative effect.may be in your configuration they work well anuff to not see a negative differance for you. I think there is more to your car to produce 135hp than a leaky carb and tow flowmasters. isn't there?

 

he said streetport too

 

theres still more to his car. and he could posibly have 140hp or more with a better exhuast. but thats IMHO

 

Monza = Pacesetter.
A full-length Racing Bleat presilencer does more to affect a pleasing exhaust tone than the choice of rear muffler.

 

Yes...the engine was done by Ari Yallon and Chris F. from Rotary Performance of Garland, TX...I'd say they know how to properly streetport a 12A block. We called Racing Beat to get header requirements and they built the header from scratch. I ported the intake manifold myself based on "gut" instincts regarding airflow dynamics and fuel suspension from the many years of High School and College Physics courses...I'm willing to put that same engine to the test again with a different exhaust combination to see if I was losing any HP, but I can't believe it'll be a big number, if at all. It'll have to be in the future, though. I guess the Eddy RPM muffler as a pre-silencer must have killed some of the tin sound, because that combo sounded like an old English sportscar...serious...

 

Monza = Pacesetter = Shitball

Go RB... sounds GREAT, Excellent power increase