Would you guys recommend a N1 Dual setup on a 91 RX-7. I found it today at the RX-7 store for 590 dollers, and was wondering what kind of performance this will give me compared to others.

 

it's a nice system, I have it on my NA...sounds good, deep and mellow and not as loud as say the Apexi GT system. the style is a love it or hate it affair but I happen to think it looks pretty evil if you're upgrading from a stock system get a downpipe/racepipe in addition to the catback (racing beat or bonez makes stuff that will swap directly w/ the stock stuff). a FULL exhaust like this replacing the stock system will net you VERY nice power gains you WILL feel...expect about 25 rwhp from a full system on a healthy 13B with power coming on strong around 4500-5000 rpm.

 

Haha bullshit....... maybe 10rwhp on a turbo.

 

he said from a full system. on a turbo, a full 3" set up will yeild u about 50hp. at least. just fyi

 

um stfu no it won't show me dyno numbers not ricer numbers.

 

Holy **** man, do you READ before you post this ****. You have well over 1000 posts and you sound like an ignorant newbie who doesn't know ****.

You have a full to4 set up and didn't know what a wastegate was!!!

You had the stock fuel system on that car and thought it wouldn't be a problem if you "stayed off of it" - lol again

You really think that 720's and a safc will keep your engine alive with your current mods. How many cars do you know running full to4 turbo's with bandaids that are still alive?

As it is right now, you are the biggest tool of this section. Either grow up, or stop posting your mindless bullshit.

For the record 25 rwhp can easily be picked up from a catback system on a t2.

Again 50 rwhp is more than possible with a turbo back system. It's not just adding the exhuast that makes all the power, but the advancement in boost as a result of a lot less backpressure. I don't think you can afford to be so cocky when you are obviously igorant of what the **** you are talking about. Thanks.

Matt

 

I second ALL of that. This, from someone who DOES know wtf theyre talking about.

 

 

hey gsracer, thanks for having my back on that. i hate when people think they know everything. i've been on here a long time and have followed many posts, so i have a pretty good knowledge on a lot of stuff. and i normally don't post anything unless i have an idea of what the answer could be. hence the low post count. but thanks again for backing me up.

erik

 

You learn something new everyday.

 

I have a 91 N/A, For the hole system, N1 dual, midpipe, and Bonez cat back. how much money will something like that cost.

 

Also what kind of power increases will you get on a N/A will the N1 Dual midpipe and Catback.

 

ok, a FULL system from the motor back on an NA will yield about 25 rwhp (no cats), a TII should see about 50 (bc you are increasing boost as well, better have an FCD and a fuelp pump though so yer car doesn't go boom). These are not ricer numbers for the NA, they are fairly realistic on a HEALTHY 13B. Racing beat showed 18hp from their cat replacement pipe and pre-silencer w/ a stock catback (NA, more on a turbo) add headers and a catback to that and 25 hp is an easy affair. most all this power comes from the midpipe/downpipe section and removing all cats, the catback alone isn't worth much power on an NA at all. If you're upgrading to a full system on an FC (NA or not) and don't feel a really nice boost in power something is wrong with your motor.

 

What are all the parts of an exhaust, midpipe, downpipe etc? And where are they positioned

 

goes like this engine - exhaust manifold - turbo- down pipe - mid pipe (replaces main cat) - catback

 

86-88 NONTURBO:

block, exhaust manifold, precat, another precat, main cat, Y pipe, 2 mufflers (Y and mufflers are referred to as catback).

89-91 NT:

block, exhaust mani, precat, small pipe, main cat, catback.

87-91 turbo:

block, turbo manifold, turbo, precat, small midpipe, main cat, catback.

When you take off the stock exhaust manifold on a nonturbo engine and replace it with an upgrade, this is called a header.

when you take off the precat on a turbo and replace it with straight pipe, this is called a downpipe.

When you take out the precat AND main cat at the same time adn replace it with a straight pipe on either model, this is called a race pipe.

IF you just take out the main cat on either model and replace it with a straight pipe, this is called a cat-replacement or test pipe.

 

all those mods and still no idea what he's talking about.

i can tell you this, the difference between the stock exhaust, and dual n1s (no cats)...is night and day.

 

SO if I wanted the most gain I should get a midpipe and replace all catbacks and also for an NA I should by a FCD and Fuel Pump so that my motor won't die.

 

With the N1 Duals

 

You don't need the FCD if you have a n/a car. The FCD stands for Fuel Cut Defender. At 8.6psi (Yes I've heard cases of some s5 cars not hitting fuel cut up to 10+ pounds) fuel cut occurs to the rear rotor in hopes to prevent detonation, as mazda believed anything over this on the stock fuel system was not a great idea.

The most gain you can get for your n/a is by going with a true dual set up, however this is pretty damn expensive. You won't need the fuel pump with just the catback and a testpipe.

 

dude, do a search and you will find all the info possible on this subject....if you want the most power out of a bolt on "complete" system and arent on a restrictive budget, you need this =

Racing Beat Header (Road Race or Streetable) > Racing Beat Pre-Silencer(s), Racing Beat Y-Pipe(only with streetable), Racing Beat Catback/Muffler

I also have an N/A and this is what im doing =

Racing Beat Road Race Header > Racing Beat Collector > Pre-Magnaflow Muffler > Custom 2.5" piping > Magnaflow End Muffler

theres so many different ways you can do it its kinda hard to tell which way gives you the "most" hp, so your going to have to experiement with it. hope this helped a little.

 

hows the bonez race pipe, instead of racing beat presilencer etc.

 

From what I understand the RB presilencer mates up to the headers they sell, replacing everything from the block to catback together. The bonez downpipe replaces everything after the stock exhaust manifold to the catback system. The gains would be more with a header, but it is louder and costs more. For the money you can't do much better than the bonez pipe and N1 Duel catback. Loud, 25 rwhp gain.... sounds about right to me, agressive looking, and LOUD. Over 2 years with that set up and I still love it.

 

Thank you sir!!!

So many ignorant people on here that think they know everything and are completely stupid and close minded.....posts dont mean a thing.

 

someone got 0wn3d in this thread, that is for sure.

The only downside to the Dual N1 is that it is heavier than a single, and splitting the exhaust flow into two is always going to be worse for flow than having a single large pipe with the stream uninhibited.