MazdaRX7.ws

Okay I just got my turbo II and i still can't get it to start on its own. I am excited though as to what I can do with it after it is running. I was wondering what is the best exhaust for the turbo II a friend of mine in florida has three of these he said the racing beat full race exhaust is the best eh\xhaust system for this car is that true? If not what is.

Secondmessiah

you live in NY you have state mandated emmisions testing, so you cant get away with the RB full exhaust

you can, however, get the catback, which looks beautiful and sounds amazing (quieter and deeper, not at all fart can like)

and a tip when installing it, take the old exhaust off in one piece, install the new one in pieces, with a friend to help you

MazdaRX7.ws

yes i live in NY but I can easily register the car in FL state where my other car is registered. FL has no inspections. That is why i was wondering.

Brody8877

iTrader: (10)

RB Full exhaust FTW!
Motoria SS dual full - for price wise.
Piece your own exhaust, ie, cs down pipe to a borla Xr-1 to an apexi GT spec Catback.

vhold

If you get the RB full exhaust, make sure you get a fuel cut defenser, unless you're looking forward to doing an engine rebuild soon. It sounds great though, looks good, and the increase in power is not subtle at all.

Jager

iTrader: (10)

I actually don't like the RB presilencer (I want to ditch mine). I personally would rather do a Corksport midpipe and downpipe and use the RB cat-back. The mufflers on the RB will do their job and it'll all bolt together. Should be prently mild on the street too (I've heard simular setups that sounded great).

That's just me though .

adrock3217

You forgot a really important part! A way to control fuel!

And Jager, my T2 has a ThunderFab DP and MP, to RB catback. It's basically what you just described..and it sounds ooogggllleee amazing!

Brody8877

iTrader: (10)

also dont forger to port ur turbo if ur running ur stock turbo!

rx7legend

i have the rb full exhaust but i ditch the precilencer, it sounds mean it doesn't sound like a fart can but it have a deep throaty sound, when im cruising it sounds really quiet but when i drop the foot it roars pretty awesome .

RevUp13b

iTrader: (12)

should he get sum better injectors also?

vhold

True, but the FCD is something I have always just seen mentioned as indispensable with the RB turbo back, so I thought I would bring it up.

I am probably going to replace my RB presilencer with a Bonez high-flow cat eventually, want to be able to pass inspection without any "magic" involved.

RealityX7

Not to hijack the thread or anything but I was about to ask a very similar question and didn't want to get flamed for not "searching" (which is useless most of the time :P) t3/t4 hybrid turbo, RB dowpipe... not sure what to go with after that. I had a straight 3" aeroturbine muffler/presilencer but I got pulled over 3 times in 2 weeks for being too loud... right now im running 3" into custom 1.75 Y-pipe and needless to say boost suffered severely looking for freeflow relatively quiet at cruise... again, sorry if you feel im hijacking this thing

MazdaRX7.ws

Okay I spoke to a rotary mechanic in south Florida today named Edgar the owner of Mazda Pro's in miami, he came highly reccomened by a close friend of mine who owns a 88 TII with a over ported 13b turbo engine with a custom exhaust, 720 cc secondary injectors, bosch fuel pump, aftermarket air intake, act street stip with organic disc clutch, and a custom mapped stock ecu.

Edgar told me if I was to put a RB full exhaust system on my car not to use a fuel cut due to the fact that it tricks the computer into thinking it is only seeing the highest stock boost when the car is actually boosting higher than the stock computer is mapped to supply fuel for, as a result using the fuel cut you will end up boosting higher with the rb exhaust & the stock computer will only be able to supply enough fuel for the maximum boost the car was able to boost with out the new exhaust and end up with detonation due to the lack of fuel for the amount of boost. He told me I would have to upgrade my secondaries, fuel pump and possibly remap the stock ecu or get a stand alone.

Can anyone tell me if this is true???

rx7legend

i really don't know man, i know that ive been running my TII for over a year at 11 psi and i don't have a fcd, if your setup is gonna be mild i sujest you get a safcII its pretty handy, and yea you can upgrade your injectors because if you run your stock ones they're gonna be almost at max when the rb exhaust is mounted on your car( i do have stock ones and im not thinking on replacing them till i get the hybrid, and till today i haven't had any problems at all) and the fuel pump you can upgrade it to a walbro because it will be sendig more fuel and its better. when you put your rb exhaust your supposed to be running 10-11psi with just mounting the exhaust meaning that increase hp= more fuel if you have nothing to controll it its gonna run like ****.

mr_vaughn

iTrader: (1)

i run 15psi on stock ecu with fullRB exhaust.with RB FCD.
295Hp untuned running for 3 years now

FC3S_nataku

iTrader: (3)

^ i think your one in a million

adrock3217

Ok, one..if you are boosting over 8.6psi, you have an FCD. Maybe the previous owner didn't tell you, but you DO have one. Without it, you CAN NOT go over 8.6psi. It's just impossible.

And Mr. Vaughn...any dyno sheets? 295hp on the stock turbo is...unheard of, to say the least. I call BS until you show dyno sheets..

Using the stock injectors with an open exhaust + intake, without any bigger fuel injectors, is fine. Sure, you will be almost maxed out on efficieny...but, it should be alright. Remember, with exhaust and intake, you need to port your wastegate (or else you will spike to 15-18psi, which will kill your turbo in no time)...

rx7legend

soory bro but i do not have a fcd, i already check my ecu a million times, and i know how a fcd loos like, everyone here where i live thinks that my TII is a really weird machine because is the only one running at 11 psi with no fcd.

rx7legend

oh and i also went to a rotary especialist here and he told me it didn't have a fcd, he told me it was pretty weird.

rx7legend

295 on stock ecu, damn i would really want to see that dyno sheet, that's the only way ill believe you bro.

JCurry

iTrader: (6)

So by theory can i upgrade my exhaust from the stock to a highflow cat, no pre cat and some better mufflers, and all i have to do is buy a fcd and port the wastegate, and i should be fine????