1987RX7guy

iTrader: (3)

YOu will like them don't worry. BTW who did you buy them from? How much did you pay?

mazdaspeed7

Ill go ahead and say if youre looking for the most gains from a collected exhaust, dont get the RB collected header. It was designed for stock cars, and having talked to Jim Langer through a few emails, I would have to say that they have no respect for n/a's, and I doubt they would spend the money to even dyno tune their headers for the optimum gain. Basically, their n/a stuff was designed to make them the most money for the minimal amount of cost on their end.

RarestRX, I dont think youll be too disappointed. The powerband is perfectly linear, which is good for autocross and such. I cant stand the sound, but the MT one sounds better than mine(but still not nearly as good as collected system). Another thing I dont like about the MT one, is it weighs as much, if not more than the stock exhaust.

NZConvertible

Well, since you asked...
I’m no expert on the design of extractors, but from what I do know I would think that a collected tuned system would work better than an uncollected system, simply because the scavenging effect of the alternating exhaust pulses is not being utilised. A properly designed H-pipe would probably solve this. However, I don’t think much of the off-the-shelf collected systems either, because they all use very short primaries. Rotary exhaust tuning wisdom on this side of the planet says long primaries are the way to go, with some systems merging as far back as the diff.
The problem with this entire thread is that while people talk about which system makes more peak power and which system has a better torque spread, but no one seems to be able to offer any real proof, including the companies making and selling this stuff. Until someone dynos the same car back to back with each type of system, this argument won’t be settled. The sellers of these systems would seem to be in the best position to do this, but don’t seem interested in proving their product.
As for the rear part of the system, my thoughts are well known. As long as the pipes and mufflers are sized correctly and the Y is well built, a dual system will flow at least as well as a single. Simple fluid dynamics says so, but again, dyno proof is hard to come by. Dual parallel mufflers are also more efficient at reducing sound, which means huge mufflers aren’t required to keep noise down to where you don’t attract unwanted attention. Personally I love the look of the FC’s dual mufflers, and roll my eyes when they’re referred to as “fake�. Since I currently have puffs of oil smoke coming from both mufflers thanks to an ailing turbo, I can assure you they’re both are quite functional...
Weight is another issue that’s blown out of proportion, especially for the cat-backs. A weight difference of ~20lb is simply not going to be noticed by your average driver (i.e. most of us here). This is considerably less than 1% of the car’s weight, and less than a quarter of the weight of a fill-up of gas (14gal weighs ~88lb). How many of you only put in a quarter of a tank because you’re worried about the weight? In terms of power-to-weight 20lb is only worth 1-2hp. This is also another argument that would be quickly solved if the sellers put their products’ weights on their website. How hard could that be?
Cost is really a non-issue; either you can afford it or you can’t. But there are savings to be made by having an exhaust system custom-made by an experienced exhaust builder. Most of the time I’m pretty sure the decision whether to go single or dual mufflers comes down to looks, and that’s a personal preference.
So that's my two cents...

JerryLH3

iTrader: (11)

Which header would choose then? There's not many options for N/A guys out there - Racing Beat, Pacesetter, and MindTrain are the three that come to mind. Or would you reccommend a different RB header?

mazdaspeed7

It depends. For most people, I would recommend the RB road race header, with a custom collector 4-7" after the flange. But porting, and what rpm you want the exhaust tuned at affect where the collector should be. For example, my collector needs to be about 6" farther away from the engine than a car with a stock exhaust port, because my port is open longer.

Im not very familiar with the mindtrain headers, so Im not goign to comment. Anyone got a link for them?

I really think the best way to go is custom headers, but there are few 2nd gen owners who could benefit from than enough to even think about it.

RotaryWeaponSE7EN

iTrader: (6)

RX7-Blazin what's your definition of foreign?

Rx-7Blazin

well i guess i mean a japanise made car cuz ferrai's arnt really ever considered rice burners and german cars really arnt eather

FCdrifter

"well i guess i mean a japanise made car cuz ferrai's arnt really ever considered rice burners and GERMAN cars really arnt eather"

-Ive seen some ricey Jettas and a few Bugs!

RarestRX

Yo,


Jason, thanks for your input. I dig the dual exhaust on the FC.

I put down 140RWHP with the stock manifold, Racing Beat DP/silencer, and HKS 50mm catback.

I will try to get my car dyno'ed with the Mazdatrix True Dual to see what it will really do. We'll see if it's hype or not.

Kevin
1989 GTUs "It better not be all hype!"

FC3S driver

iTrader: (1)

duals all the way. why? because it looks that much more intimidating when you have 2 fatty cans shooting flames then one.

RX-7Impreza

this accompanies the whole Honda theory "why make it perform better when you can make it LOOK fast??"

i guess if you are out to impress with your cars looks, then thats cool for you.

personally, the only ones I want to impress are the ladies, and i dont need a car to do that. just a smile and a wink....

Justin

"If they cant make their cars faster, they sure can make their blinkers faster"- cant remember

Psychoblue23

omg I have never been so confused in my life.... ?!?!?!?!

- James

1987RX7guy

iTrader: (3)

THe DUALS provide the visual balance that WE want and enought performance to back them up and a non-rice mod. This would be to scare away RICE not to attract it.

NZConvertible

So from these comments I guess you're car looks completely stock from the outside (rims, ride height, exhaust tip, etc) right? Because surely any exterior mod that happens to imply performance must be fake "ricer" crap...

The whole anti-rice attitude that pervades this thread and plenty of others is getting really boring. Those of you who constantly bleat about this being rice and that being rice need to take a deep breath and forget about it! Instead of taking every paranoid step possible to avoid maybe being associated with Honda drivers, you should just figure out what you like and stop worrying about what others do to their cars. Sure have a laugh at them, but stop telling everyone here they can't do something to their car just because you think someone else might mistake their car for a Honda...
There will always be people who exhibit bad taste when modifying cars (some of them drive RX-7's...), but just because they happen to like big exhaust tips for example, doesn't mean all owners of cars with big tips should be lumped into the same category.
Basically, take a chill pill.

projekt

ok, since this argument is getting no where fast, i'll just ask a nice simple question

RB header/presilencer, RB mid pipe, Cork sport Single

too loud?

if i'm confused and the mid pipe isn't necessary please correct me.

1987RX7guy

iTrader: (3)

are you talking about the pipe in between the header and presilencer?

projekt

well if the pre silencer removes the cat, no. i can't remember since i haven't been to the RB site in like 3 days and my memory sucks.

mazdaspeed7

You will DEFINATELY want the midpipe with the corksport muffler. That sounds like a pretty good street setup for a mildly modded car.

Jason, I hear that. Im so sick of the "rice paranoia"(sp?) that this forum is full of.

Jimmy325i

The 4.5" O.D. flame shooting from my "huge" exhaust tip scares the ricers away plenty good.

I don't think its really all that big though. When you slap a 6" melon launcher on a stock 1.5" exhaust system you have issues.

RX-7Impreza

actually my car looks like crap, stock wheels(s5 TII), dirt brown (gold), bump trim falling off and broken on drivers door, white oxidized hood, rear suspension is WAY higher than the worn out front.

so i could easily say that any exterior mod is rice and not be a hypocrit. but i never said that.

it just irks me a little when people ask what performs the best and then someone says "duals because: 'thats what it came with', 'intimidation factor', etc etc etc.

i dont know why you aimed this at me because i dont give a damn 'what' people do to their car, but the 'why' sometimes irritates me. especially when it is misinforming to the people who want facts, rather than opinions on aesthetics

but i do agree that "rice" paranoia is quite irritating. just look at the never ending "TII hood on N/A" thread

eh, my $.02 i guess

Justin

NZConvertible

Please don't take my comments personally, because apart from the first paragraph they weren't aimed at you specifically. They were aimed at everyone who continually post the same old rice-ophobic comments on every exhaust/taillights/bonnet/wings/etc thread. Your Honda comment was just a catalyst for my little rant.

RX-7Impreza

gotcha, no offense taken, and i know exactly what you mean

Justin

RX-7Impreza

example https://www.rx7club.com/forum/showth...threadid=60201

LOL