hey wuz up, i got an 86 rex, non-turbo, and o bought the hks hiper cat-back system, the racing one that cost like $1400, and its to loud, and i also got headers on it, but also i bought the exhaust for a turbo II model, because i was gonna swap the engine to a turbo, but i didn't, would that do any diffrence in the cars performance, cause the piping is like 3 inches, and i'm just wondering how i could lower the noise from the exhaust, thanx

 

Ur going to have to use some type of pre-silencers, like the ones www.racingbeat.com sells.

 

It may be loud but I'd bet it sure sounds good

 

yeah, it sounds beautiful, its like music to my ears, but its way to loud, and the cops over her r really strict about it

 

I use the Borla XR-1 for a presilencer. You do realize that if you want to make maximum power out of that thing, your best bet is to run true duals. And 3" is overkill unless you have a bridge port, or at least a REALLY large street port. The N/A's are always louder than the turbos because of less restriction.

 

Maybe you should sell it to me for cheap

 

aim the exhaust towards the ground.
that will help a little.

 

Ya the turbo really quiets down the exhaust and changes the tone.

 

Like people said, add a pre-silencer. But really, if it were me, I'm more about value for your dollar and performance, so you can get a no-name pre-silencer (basically a glasspack w/o the glass) for $20 and install it midway, or two if you want. It would only add like 1-2 psi of backpressure, but quiet it down a lot, and get rid of any raspy high pitched sounds if you have any.

 

if u want it ill sell it too u

 

I've currently got a rear muffler off a Subaru WRX - I assumed that the Rex made a heap of power and therefore it must flow a heap of air.... WRONG! I cant hit wide open throttle without it gagging and even on part throttle 60kmh (ummm about 28mph) in 2nd and 80 or so ( about 37mph) in 3rd are about max speeds (on a 3.7 or 3.9 diff).
My point? choking it doesn't work!
We have a local noise limit of 96db for pre 1984 cars and 90db for later.... so meeting it in a ported rotary is not particularly easy....

edited bit - its a 13b BP, 48ida weber, in a 1976 Mazda 1300

 

How much?

 

well it originally costs like $1,400, but i'm gonna sell it for like $500, its still brand new, no scratches, i've only had it for 4 months, its the single exhaust system

 

exactly what i was gonna say!! do it SCCA style lol. thats what guys do when in practice, they find out there over the decibal limit... just quick attach a pipe toward the ground. haha