WanKeL FD RX-7

iTrader: (7)

I am wondering what i will put on the car to have a great exhaust and great sound too.

I planned on buying a racing beat downpipe (90$). After that, should a 86-91 Cat-back fit on my 83 gs ? I am looking at the ones on rx7store.net . What is the best solution for exhaust.

Max

pillage6

You are going to have everything custom fabbed.

It's not that hard, most muffler shops won't charge you too much.

XLR8

iTrader: (52)

3" turbo back.....You will be amazed

WanKeL FD RX-7

iTrader: (7)

3" fits without modifications on a 83 GS

JIMMY54

iTrader: (2)

yes 3inch can be done.... if you are going turbo it's the only way to go!

WanKeL FD RX-7

iTrader: (7)

2 ½ " isn't enough?

WanKeL FD RX-7

iTrader: (7)

2 and a half sorry

FuLLsMoKe

Well, for N/A, that'd be fine, but with turbo there's more pressure in the system and more exhaust will be trying to escape... I would definately choose 3" (check what RB uses for TII engines).

FS

rx7passion

the racing beat 3.15" or 80mm downpipe and prescilencer fits fine on a first gen. depending on your tranny mount and angle you might have to rebend part of the DP but it fits.

JIMMY54

iTrader: (2)

How much ground clearance do you have with a 3" exhaust?

kuhlrx7

the 86 and newer will not fit, everything needs to be custom. I posted on the big t2 in to first gen post some things you need to know. but because of the amount of pm's I am getting I will use this thread to anser this type of question. how your rx7 sounds is up to you. ie.. what you like. loud; one straight through rear muffler 3 inch pipe. ask setupz about this or lisen to his recently posted clips. how ever to start. you need to decide what size pipe you are going to use 2.5 or 3 inch ? it matters on what your choices are in mufflers. for referance I will use my system 3 inch custom SS downpipe is what I have coming of the turbo ( you can use anyones 2nd gen downpipe many companys make them) then I am using the small dynomax race bullet as a front presilencer a short piece of 3 inch with a 18 -20 degree bend. then the longer dynomax race bullet as a second pre muffler/resonator. then over the axel ( I used the 3 inch midpipe from isc racing 80 $). and then a rear muffler. the two premufflers will lower the exhuast note and remove as much of the tiny sound as can be done and also remove the dreded drone. the rear muffler then makes a big differance on how you want it to sound (rule of thumb cheep sounds cheep ) with out a pre muffler it does not make much differance most all will sound bad. coffie can style will sound the worst. a rolled tip or resonated tip whill improve on the exhust note. now things you need to know are 1) the temp rating of the mufflers you are going to chose need to be high anuff for your use. you can make a rotary sound real good for a short amount of time with fiberglass packed mufflers 10 min to 2-3 months the fiberglass packing will melt then the muffler self distructs. 2)chambered mufflers will lower your horsepower and sound awfull.( most have a disclamer agenst use on a rotary engine) 3) I posted the temp readings for exhuast here https://www.rx7club.com/forum/showth...&pagenumber=17 you will allso need to note those readings where taken on a lift not with the car on the ground and run hard at a club event or such. consider a buffer range of 200 degrees and you should be safe. 4) straight through mufflers provide the most power 5) turbo style mufflers tend to blow out. 6) any thing made by pacesetter/ monza will have a verry short life. 7) the longer the inside core area of the muffler the less damage to your ears.( for those that like there sound systems the more lenth the better) 8) things that change the way your exhuast sounds (design ways) rear muffler dual outlet verses single, dual out system ( distance from where you split from the back) my system and what it should be able to be copyed for;
3 inch SS u&l bend $100
dynomax race bullet wlk-24222 $ 50
dynomax race bullet wlk-24219 $ 50
midpipe isc racing 20086-it7 $ 80
rear muffler your choice mine was $170
band clamps SS x 3 $ 10
3inch SS exhuast clamps x5 $ 5
hack saw blades $ 15
someone to weld dp together $ 60
standard SS clamps 4inch x4 $ 5
cut and reuse stock exh hanger free
my total excluding $50 gasket $600

if you were a good welder it could save you $60 for the dp + $5 in standard clamps + $10 in hack saw blades if you use standard exhuast tube bends + $60 intube bends + $50 If you made the over the axel pipe + $30 in band clamps in short if you were good at welding you could save your self about $220 get a good deal on mufflers you could make a total system for around 1/2 of what I spent. I hope this ansers the questions regarding t2 exhuast on a first gen

WanKeL FD RX-7

iTrader: (7)

i got a estimation for my custom exhaust.. it is 750$ CDN for the complete line 2.5 inches in SS with a Ravin' Muffler (racing muffler the black one)

web777

Go 3". you'll regret it if you don't. I don't think you need S.S. It shouldn't cost that much. Mandrels are appx $15 from JC whitney. It shouldn't cost more than $250 US for the exh w/o the muffler.

WanKeL FD RX-7

iTrader: (7)

750$ CDN was for the muffler, downpipe, line, all in SS

I can get a 3" too

kuhlrx7

you could get the 3inch racing beat downpipe $125, isc racing midpipe $80 one dynomax bullet $50 to fit between the downpipe and midpipe thats like $250 us all you would need would be the rear muffler. IMO the ravin is a piece of junk that will sound like that also its a baffel muffler that only $50 and the black paint on it will be gone in the first 3 months. baffel mufflers are a poor choice on our rotarys the first back fire and its blown. look for something of quatily thats a straight through design. 2.5 inch for 750 cnd you should be getting a better rear muffler and better grade SS. did this place tell you it would be loud and sound bad? chambered mufflers work on a sound wave design. on a rotary it just amps the loud tin sound rotarys make. you need a premuffler and a good rear muffler to cure this problem

WanKeL FD RX-7

iTrader: (7)

the problem is the shipping costs man !!!

WanKeL FD RX-7

iTrader: (7)

what muffler shoud i get?? I can get the Racing Beat downpipe from Mazdee's in Ontario, how about the mid pipe ?

WanKeL FD RX-7

iTrader: (7)

where can i find the mid pipe?

eddierotary

iTrader: (7)

but first what engine and turbo youre using? if youre using a turbo II turbo expecially a 87-88 one you should better go with 2.5 or youre gonna have overboosting problems with 3". i think that 3" are better for upgrade turbos like to4b. but that my opinion

WanKeL FD RX-7

iTrader: (7)

125$ US for the downpipe, i didn't find it on RB's web page ? As for the cat-back, could i put a RB Turbo II muffler, this is written they can be sold seperately because on the pic they show the Y-pipe with the two mufflers. How much is one of the two ? and does it fit on my 83 gs ?

WanKeL FD RX-7

iTrader: (7)

i'll get a S4 TII engine. I'll not run over 8 psi.

Max

WanKeL FD RX-7

iTrader: (7)

http://www.racingbeat.com/resultset....rtNumber=16445 this cat-back, would it fit ?

with this downpipe ; http://www.racingbeat.com/resultset....tNumber=16425D

Max

82streetracer

iTrader: (1)

my turbo project has a full to4 upgrade.

I was planning on building my own exhaust, from the v-band on the turbo : 3in 304 stainless, borla xr1 stainless muffler in the center, pipe under the axle and a cheap stainless N1 style muffler at the back.
You can get prebent 3in stainless pipe from jcwhitney.

Should sound pretty hardcore.

Rex4Life

I would suggest going with something proven by others that already works and fits within your budget. I know 3" exhaust sounds great (pun) but you have to look at the whole system.

I'm definitely not an expert at this point but I've read quite a lot over in the 2nd gen forum about TII mods. Depending on your intake I think you will well run over 8 psi with a 3 " exhaust, and if you don't have the ECU/fuel delivery to compensate you can blow your engine pretty easy. I've heard you can run up to about 10 psi and be OK, but to me that is the ragged edge.

Try keeping the stock system with your 3" exhaust and see what kind of boost you get, then if you have margin, mod the intake side. Remember cold days will send you into higher boost levels. Or better yet get some kind of fuel add-on like an F-con to compensate for the lack of fuel at the high end.

Me I'm just going with the stock TII ecu (it's cheap), GSL-SE intake system, stock TII exhaust, stock GSL-SE muffler and a walbro inline fuel pump. Then I'll start modding the exhaust and see what I get. First RB powerpulse muffler then a RP turbo high flow cat.

I'm only looking for about 200-210 hp which should easily be obtainable.

Good luck and read up on turbos in the 2nd gen forum.

Scott

P.S. I am pretty much finished with the wiring details for an 88 TII engine into an 84 GSL-SE. If you're interested send me a pm and I'll email it to you.

kuhlrx7

scott you should have no problem obtaining your goals, you will however want to go with a 2.5 inch downpipe it will make it much easier to hook up to your old system. I would look at the shorty style downpipe thou like the one rp sells. you will still want to take precautions for boost spike. you are correct about 3inch on a stock t2 using a stock ecu.