actually theres 2 JIM's at racing beat. Jim Mederer is the co founder and long time engineer, the other Jim is a marketing guy

You're reading it wrong. This: "maximum performance benefits will be realized from cars with intake, ECU or porting upgrades" means that the full benefits of this exhaust will be realized with utilizing the additional upgrades.



Nowhere in the racing beat description does it compare it to a different exhaust format.

First of all i cut & pasted the description from RB's website of the dual exhaust. you say "On racingbeats website they state that the true dual is only for street port or stock port systems" WHERE exactly does it say that?



Secondly i'm not "yelling at anbody" lmao

I am going on two things: 1> what racing beat has on their website and i have been told by people there

and 2. PERSONAL experience with both street and dual headers .



3. the collected vs. dual debate started because the guy WHO STARted this thread talked about utilitzing the RB STREET header. now REGARDLESS of WHere you wanna collect or run true dual you would NOT use that header because it collects before optimal for a bp (definetly before the 84" or so you quoted as a guidline!)

so my main point for him was simply to use the true dual header. now whether he wants to collect or not is up to him as per his application and wants/needs etc....Where to collect the exhaust if at all can only be answered by him (the driver of said vehicle) however regardless he NEEDS the dual header now THAT was my point and THAT you cannot argue.



ALso when referring to data most people in most professions argue the most current information avaialble not 20 year old info. thats like saying 12a were better than 13b's lmao (oh and i guess 1st gens were the PINNACLE of rotary r&d, lmao)

you guys act like r&d stopped when 1st gens were running funny if i remember coorectly the cars increased in power so obvously mazda was still Racing and doing more R&D

so,

if you wanna refer to 20 year old info be my guest, i personally will continue to refer to the most current info available

FOR THE APPLICATION (a bp 2nd gen)

so i guess your saying RB made a "downgraded" exhaust system! nice!

yeah i guess all you guys know more about exhaust flow than the guys at racing beat https://www.nopistons.com/forums/pub...>/rolleyes.gif

another thing i just thought of: RB doesnt even OFFER a single side exhaust for fc so.....................................

why is that????? think.......... https://www.nopistons.com/forums/pub...1047683561.gif

https://www.nopistons.com/forums/pub...R#>/tongue.gif

Step away from the crack rock. I'm just saying that the description you posted from racing beat in no way relates it to any other exhaust. It merely states that you'll receive the greatest benefit of that particular exhaust by upgrading the other mentioned items.



Geez, way to turn a thread to ****.

they dont offer a single SIDE, but they do offer a SINGLE system.

way to twist everyone words around, including mine and RB's and thanks for contributing your completly useless comments https://www.nopistons.com/forums/pub...IR#>/bigok.gif

no sir, YOU need to step away from the crack rock. LMao https://www.nopistons.com/forums/pub...R#>/tongue.gif

watchu talkin bout willis?

single system???>?>? for fc?>??>?>?



oh j9 you said "theres plenty of room in a 1st gen for a dual, ive seen a few of em."



not with a stock gas tank you didnt.! show me a stock gas tank 1st gens with duals.



you cant . I JUST went out and looked at my first gen with a stock gas tank and guess what....

the gas tank goes about two feet in from the rear bumper,(sided to side) and from the driver side all the way to the heat shielf for the passenger side exhaust exit.,



so, IF you have seen a dual side exhaust for a 1st gen it mustve been one with an upgraded tank.-(different size/placement)

nope, theres room for 2 turbo mufflers in the stock spot. put em vertical like, and the tips can even look stock.



keep in mind the STOCK system for the FC is a single, it just Y's out to 2 mufflers

Wow. I leave for a few days and come back to this still going on?



People in MD can't drive anyways, it's a known fact in the metro area https://www.nopistons.com/forums/pub...IR#>/smile.gif



Regardless, you can run true dual on an FB.. Just because the mufflers exit on both sides of the car doesn't mean thats the only way to have true duals. Haven't you seen two mufflers side-by-side on one side? I have, a lot - on a lot of RE powered cars including an RX-3 my buddy's dad just picked up - oh, and guess what - it was RACING BEAT who built it. I dont think RB would appreciate you making claims to them. You speak of personal experience of which I'm sure you have none - were you even alive when the first gen came out? The pre rx7 model all together? You have NO clue or "personal experience" of what R&D went on back then.



This thread is now a moo point, so I'm sorry we didn't help the original poster.

ok, so basically your saying Mazda added the second Muffler of 2nd gens to add extra weight while looking "cool" lmao.



power gains or not, hey, to be honest with you. i hate dual exhaust on fc its a pain in the ass to install , wieghs a ton, and hard to line up the tips even. so ima have to score me the apexi n1 single side.

https://www.nopistons.com/forums/pub...IR#>/bigok.gif

the 1st gen muffler is big, but the 2 FC mufflers together are something like 30% bigger. plus it looks cool https://www.nopistons.com/forums/pub...#>/biggrin.gif

ok 320b since you obviously got somethin stuck up your rear end heres some facts for you.



ive currently own 4 rx7's and have owned a total of 12 i probably have more experience with rx7's than you.



i didnt' make claim for racing beat. Racing beat makes claims for Racing beat thats why i cut & pasted off of THEIR website moron. oh and yeah i dont have any experience talking to Racing Beat except ive send rotor housigns to them and had at least 3 engines worth of irons lapped there besides buy literally thousands of dollars of their off the shelf parts. and calling them up for advice on numerous occasions.



and finally. you need to learn how to read properly and not post if you have nothing to add to the convo.



how much experience do YOU have with RB ? or with rx7's?

oh i guess YOUR the RE expert since you own 1 non turbo second gen huh https://www.nopistons.com/forums/pub...1047683785.gif

gtfoh man

"This thread is now a moo point, so I'm sorry we didn't help the original poster."



wrong again here, the engine is now for sale on the for sale section of the forum. https://www.nopistons.com/forums/pub...#>/biggrin.gif

"People in MD can't drive anyways, it's a known fact in the metro area"



really one320B? funny i think Demietrious, Ray Lochead, and "JR" Gittin might disagree with you on that.

yeah im selling every thing.....maybe chassi too

I'm not going to start a pissing contest on who knows more - but i've got you beat on number of rexes owned just in the ones that RAN alone, not including parts cars.



My SE is not NA... the only NA 7 I have is the '85 GSL...



I've built cars mazda has used for marketing and countless sponsors - tuned cover cars, etc etc...



As for RB - my wholesale account alone passed more $ w/ them in one month than what you have probably spent in a year with them, lol.



I also do all my own engine work and dont "ship it off" to be built - you gain more experience doing it yourself. All of this is a side hobby on top of my day job, so I'd say I've done fairly well.



The only person that I know who has had more rx models than me is one320fb, but he's got old school https://www.nopistons.com/forums/pub...IR#>/smile.gif

This thread has been fun, but it sucks your selling your setup man. There is always more rotary to be had... good luck.

Funny things is 320b if you actually READ the posts in the thread in the order you would realize your actually AGREEING with me on the dual true exhaust issue just not on its application for 1st gens. go read it. i was the one FOR dual exhaust....but you HAD to chime in with your attempts to talk b.s wo/ reading the WHOLE thread

like i said READ before TYPING it MIGHT do you some good and prevent you from making an ass of yourself.

and for someone who claims to "not trying to start a pissing match" go reread your posts becuase your words seem to spell otherwise. well hey your such a big baller right?! cuz your such a big Spender at rB? gtfoh https://www.nopistons.com/forums/pub...1047683664.gif seriously read that **** you sound like a high schooler.........sorry thing is your probably my granpas age. Grow Up.

I KNOW I WILL BUY ANOTHER REX SOMEDAY BUT FOR NOW ILL TRY BUYING A NEW CAR

why not just try to trade your bp engine for a diff. engine setup? why sell the car?

no one will do a fair trade...ive spent too much

so build another engine and save your bp when your ready https://www.nopistons.com/forums/pub...IR#>/bigok.gif

i found a nice 1st gen all original for 1200 i might buy it

offer em 1000 cash im sure theyll take it https://www.nopistons.com/forums/pub...IR#>/bigok.gif

I realize this has been beat to death but I'm bored.



Based on compressible flow fluid mechanics, for pipes with a low roughness, a pair of 2" pipes will have a higher pressure drop than a single 3" pipe, despite there only being half the flow through each pipe. Also, the true duals fail to utilize the pulse reversion that collectors use. These pressure pulses can be very high, as you can tell simply from how loud the car is. Duals rely only on the flow momentum to pull more exhaust out.



Just for the hell of it I ran some numbers:



At system conditions of 100%VE (for simplicity), 3000RPM, EGT of 1600°F, and using commercial steel pipe as a basis, the dual 2" pipes will have approximately 37% more pressure drop than a single 3" pipe.



The pressure pulses emitting from the exhaust ports will be upwards of 100PSI when the exhaust port opens. Even if only 10% of that pulse is reverted, that is still a 10PSI drop at the opening of the other port.





-Andy

inneresting

dude keep the engine and other parts and get rid of the chassis.. people practically give them away now since they are gettin old..

im think of a first gen with a bridge port and holley or a turbo 2 swap.....do you guys know if there is a way to wire up the factory ecu .....i would love to used the factory ecu...

im not a pro here let alone do I know anything about tuning or BP'ing but I know a SAFC is great for pulling some fuel on a n/a or something but once u get into porting and big power u need to step up to a stand alone for sure

i give up explaining ecus to you.



ya know what you can run a pport and 2 GT42R's on the stock ecu.



kevin.

i mean a stock t2 with stock ecu in a first gen........or.....bp and holley

if your not running a STOCK car you shouldnt use a STOCK ECU.

give it up.

i dont know what its wrong with using the s4 rotors on a BP,i owned 2 BP on the past with S4 NA rotors(TURBO)and they ran fine,in fact everybody that i know build BP with s4 rotors cause the rotors are stronger,if weight its issue just get them shaved,now if you are running NA go with the S5

wow. i almost give up after the first 2 repliers completely misunderstood whats the op was saying and went off on a different quotient. all i know is i had a similar set up on a first gen and it ran great. half bridged t2 irons, with s4 na rotors, headers and 3" exhaust. awesome top end.



as a side note: you can run true duals in a first gen. racing beat is business, they'll sell you their products.

yeah im running the car now and its great..... love it. low end kinda suck slow acceleration but above 4500 to 9k wow the car really moves. you really feel the car above 6k and you know whas great it reall does not eat that much gas as a full bp. like i mention 9.4 rotor , 91 t2 plates with half bp, 3" exhaust 420 pri 550 sec , fd fuel pump and 91 ecu oh yeah 2t intake manifold.

I did something simular:



I turbo's a 6 Port S4 motor... Using a Haltech



It ran great until I blew a Apex Seal, but it had 160k miles on the motor.

(It made 15 psi of boost with the stock S4 Turbo and 550cc injectors) to a 3" dump pipe.



My new motor is a basterized Rotary.



I'm running 6 port end plates because I like the aditional intake timing, much like a bridgeported motor. Turbo center plate, Turbo Rotors, Turbo Oil Pump. Plates are further ported using Pineapple Racing templates. Using Turbo II housing, Ported as well. Still running a S4 Turbo (Wastegate Ported). S4 Turbo is due to my motor swap I don't have room for a HUGE turbo. Also running NOS 2 injectors on the motor. Still running the Haltech, but will be using larger injectors on the sec side.



More here: http://zuki-r.com