When looking for a new exhaust, should I go for a 3" or 2.5" diameter?? I have an aggressive streetport on an 87 TII... planning on upgrading to an 89-91 turbo.. cone intakes...

Thanks

Aaron

 

turbo.... 3"

 

And what cat-back?? The apex'i looks like it might hit the ground if i lower my car at all... lol... aside from the racing beat and N1, what other exhaust are recommened?

Aaron

 

from what i see on RB's site their full turbo exhaust is amazing, showing 58hp increases on stock engines, plus its like 800 bucks or something, not too bad if i say so myself but im not a turbo guy so im not positive about what system

 

Yeah... but i've also heard its really quiet.... i believe someone said it's "stock honda quiet." I wanna be able to rev at someone and have them know it.

Aaron

 

probably the N1 then, or the Greddy power xtreme

 

Didn't the power extreme get discontinued?? Also, does the PE have a silencer you can buy?

Aaron

 

i think RP still has a few PE's left, i dont know if they have a silencer though, sorry

 

I'll prly just end up going with the N1.... nice sound... and silencer is available too...

Thanks

Aaron

 

aight sounds good man

 

any of the cat backs, N1, greddy etc, are only 2.5" at the flange, so you might as well get a 2.5" down pipe etc aswell. if you want a 3" system, either get the racing beat, or get a custom one.

 

So if i were to get a 3" HKS DP and a high flow cat would that mount up to the 3" racing beat catback?

Aaron

 

I believe the HKS dp replaces both the precat and main cat, as well as the short piping in between them. I also read somewhere that the fit isn't right, as the HKS is a bit too long.

 

hmm... well what 3" turbo to catback stuff should i get then?

Aaron

 

don't buy a cat back. make one. it'll be way cheaper. just find a local shop. and the racing beat catback will only be 2.5" at the flange too. the whole system is 3" and only works with those parts. the cat back is 2.5" so it will bolt to the stock cat.

if you don't want to build one, just buy the racing beat. it's way cheaper then buying a cat back, down pipe, and mid pipe. it'll out flow the rest, and last longer. the RB exhaust is the best.

 

Why rev if you can just spit flames at them hondas. I have it and it spits flames..Not as quiet as the other guy just said. But it can get loud when you're at it.

 

wait a sec...who got 58 hp out of just exhaust?...i know this is a full system and all but 58!??! if it can really do that, who gives a f if its quiet. can anyone vouch for this?

 

that is what they claim on there site for a 86-88. so 180hp to 240hp. but that's also because the boost raises from 5 to 11psi...

 

Does anyone on here have any sound clips of the RB system?? I really wanna hear what an exhaust sounds like before i buy it.

Aaron

 

it sounds sweet! and it's not that quiet. don't have any clips. I'm going to try to make some movies this spring.

 

so then what does it make at the stock psi level?

 

11 psi IS STOCK when you put this system on your car. It increases boost by 6psi. I have the system myself and yes 58hp is an accurate figure on horsepower increase. You need to upgrade the fuel system to sustain that boost otherwise you'll blow the engine like I did.

 

damn boost creep!! Why would Mazda cut the fuel to the engine? To only one rotor at that!! (No wonder the rear rotor usually goes first) Why not have a spark-cut feature instead? Were they thinking, "Hey, lets cut the fuel to the engine UNDER BOOST so the thing goes lean, the ****** blows, and they buy a new engine for an insane amount from the factory!!" Ha!!!

Hate Mazda, Love RX7s

 

thats freakin insane...i should have looked into this car a lot earlier...being a honda person, i expected little to no gain from exhaust...certianly no wheres near 58 hp for the price. well thats good to know...sucks about the engine tho. i would have just slapped the exhaust on.