rxspeed87

going with a true dual system and just want to get everything done right for the bestt power gains.

who would have a better header for me to use mindtrain or RB?

I am going to run 2 inch all the way back but I am curious what would be the biggest size muffler core I should use

also was wondering right where the stock y pipe would take place would it help if I put a x-pipe there or would that cause power loss

and does anyone know where I can buy just the N1 cans

do I need to run pre-silecners with this setup or could I get away without them



as for the susp
would there be much of an jump in vibration or noise using a solid diff mount?

and the racing strut brace that mazdatrix sells is it worth it?

rxspeed87

TTT

supergoat

an x-pipe would be beneficial since it would help even out the pulses causing a deeper/smooth sound. As for power loss, I doubt there would be much if any. If it were my I'd go for an x or H pipe configuration.

avrfan

X Pipe on a rotary? I've heard of people using those on V8's with dual exhaust but this is the first time I'veheard this for a rotary.

Mazdatrix seems to imply that pure dual separate pipes gives the best performance for the NA. Was I reading between the lines too much on their site? Here's the link to their dual exhaust system narrative.

http://mazdatrix.com/r-ex86nt.htm

Well, you did mention there might be a slight power loss which sounds reasonable. Have you had the chance to hear straight dual vs. x-pipe dual exhaust setups? How does the straight dual sound? Is it nasty compared to the smoother sound of x-pipe?

Are there alot of folks that have done dual exhaust with an x-pipe on the rotaries?

Dave

rxspeed87

the x-pipe helps to equalize pressure between the dual setup, and is to make the exhaust scavange better
I have a dyno of two runs but it is on a boinger motor and it looked to make a good size difference in bringing power up through most the power band. oeak was only up like 5-8 hp/tq but low end saw gains of over 10hp and 20 ft/lb tq

I can get the dyno numbers for yeah if you guys want to see them

avrfan

I'll pass on the dyno sheet for the piston engine but if you have dyno comparison for a rotary engine with dual exhaust with and without x-pipe, then I'd love to see that!

There's got to be somebody who has done this with a rotary and has tested to prove the gains besides just seat of the pants.

Dave

rxspeed87

well if nobody has the dyno on a rotary I might do it myself then
just make it to where I can bolt up the x-pipie and then if I dont like it to put just put dual pipes in there instead.

already going to have a place set up so I can bolt in some presilencers if it is too loud but then take them out and put straight pipes instead when racing.


oh and as for the exhaust sound I am hearind that the x-pipe will make it a higher pitch...


oh yeah does anyone know how much it cost for dyno runs?
if I am to do this I will do a before and after for everyone to help the N/A ppl out

avrfan

That's cool. I can't do this kind of setup swap easily. Heck I haven't even put my headers on yet! I got a quote from a shop in Santa Clara, CA that would do 3 dyno runs for $100.

I like the higher pitch sounds myself. I don't like deep boomy exhaust. That's what my stereo is for not my exhaust.

Dave

rxspeed87

so far my only probs are where to get the pipes and the muffs and which header to get.
want the N1 cans but dont know where I can get just them. and which header do I get. mindtrain or RB?