M2 IC piping solution?
 

Hello All!

Has anyone found a vendor that sells a pipe to connect the M2 large (or meduim for that matter) directly to an Efini y-pipe WITHOUT using the crossover pipe?


Peace,

Michael
93 MB Touring

I've looked into it. The Efini y-pipe's studs are sort of in the way of where the M2 pipe needs to go.

I had a local fabricator machine my y-pipe so it's round with a lip ($25). Basically he just ground the areas with the studs in them off as well as the flashing from the casting process. I then put a 90 degree Samco coupler on there, cut the M2 pipe so it's straight, and VOILA! M2 large with y-pipe.

I'll post some pics.

:devil: problem solved

good enough until I go single

Sell the y-pipe and go back to stock

yeah, right

no rubbing either

how is this any different than having a normal pipe other than the 90 degree coupler? doesn't griding the studs off just make your y-pipe a normal y-pipe?

i thought this persons post was to see if there vendor who sells a crossover pipe that can hook up to the efini y-pipe and m2 ic....

i have looked into this with my ic and it looks like the bend will be too sharp to work effectively...the best way to modify your efini crossover pipe is to cut it at the flange and rotate the pipe so is goes to the other side of the filler neck where the normal m2 ic pipe goes. there is a helluva lot of fabrication to be done though...i though of having this done but it would be a pia...

Re: M2 IC piping solution?
 

No, he said

Yes, it is like using the stock y-pipe except it is the efini one which is good for ~10 more hp. That, and the fact the molded silicon coupler does a 90 degree turn a hell of a lot better than aluminum. It fits better, the pipe doesn't hit the strut tower brace, and I don't have to worry about the pipe backing out (up) like it normally would.

LOL!!!!

You think that the efini y pipe adds horsies?!?!?
They only difference is that you can bolt it to the crossover. It adds no horsepower Mr. Confusion.
'You might as well just use the stock piece. I have had all the parts mentioned in this thread so i am not spouting off about shit i dont have first hand knowledge of.
I have had a few different pipes there and i have never had any problems with them blowing off. Ok I lied once it back out and that is because I broke the t bolt clamp.
Pipes that are made properly have no kinks in the bend radius.

It seems to me like your looking to make work for yourself. The stock pice would of work just as well.

:jerkit:

kiss mine fuck face

He asked a question and I gave him the answer. If the stock part is so great, why did Mazda change the pipe to the BOV and not just the way the crossover pipe attaches? Don't be a such a whiny bitch.

Great another kid that has his facts wrong and wants to get mad at me about it. Look kid, I am just pointing out the obvious. You are mistaken about the Y pipe adding horsepower to your car. Mazda offered the upgrade so that you could eliminate the coupler (stock ones dry rot and crack causing boost leaks) So the addition the studs so that the two parts could be bolted together is an added improvement. If you are not bolting the crossoverpipe down then there is no need to use the efini part being that that the only difference is the studs on the lower unit. But hey feel free to throw out some more ridicoulous insults and prove your insecurity even more. I love it.
;)

Obviously you don't have the Efini y-pipe or you would notice that the area around the pipe to the BOV sticks out on the Efini version leaving a clear path for the air inside. On the stock pipe that came with our cars, the casting forms a hump that pokes into the airflow about an inch. It's fairly significant. If you do a back to back comparison, there is a difference, especially when the second turbo comes on. I'll post some pics if I can find my old pipe.

And don't be getting on a thread like you did calling me "Mr. Confusion" when it's plainly obvious you've never held a stock y-pipe next to an Efini y-pipe or looked inside the two to see the real difference. And yet you claim to have had all the parts we're talking about in the thread.

Correct. Fd3BOOST, look again at the inside lower halves of each version.

Ok once again Mr. Confusion. No I have never owned am efini Y pipe.

http://www.fd3boost.com/album/userim...2a9ddbc51c.jpg

Nor have I ever had a MR large IC..

http://www.fd3boost.com/album/userim...454a22b936.jpg

I have never used any other pipes.. No not at all..
http://www.fd3boost.com/album/userim...e452e9297e.jpg




http://www.fd3boost.com/album/userim...3c803fdd53.jpg

And now your going to say??

Look as far as that minor as cast hump It isnt going to make or break 10 HP. Still it would make more sense to grind that off then to grind the studs off.
No get a clue please. You might wanna get your facts stright about me before you go making assumptions.

See how much more the pipe sticks out? When you look inside, there is a major difference in the airflow path. That's where the extra HP comes from because you don't have a little hill of aluminum in the middle of the inside of the pipe.

If you say that there is a large amount of casting there that is blockingf airlfow. I will say again why would you not grind that off instead off hacking off the studs on a Y pipe?
And you say 10hp, where did you do dyno comparisons to come up with 10hp?

The casting I originally referred to when I first posted was about the seam on the outside of the pipe because it interfered with the coupler - i.e. it didn't seal smoothly/tightly. So I had it ground off. The metal around the BOV pipe can't be ground off because the actual shape of the pipe is different. It's not a matter of some extra material inside because otherwise, yeah, that would be cheaper and easier. The only way I can describe it (without going down now at 1:30 a.m. and trying to find my stock y-pipe) is the area around the BOV pipe is concave (it bends inward) on the stock y-pipe while the Efini casting is convex (it curves out).

Are you referring to the small lip around the pipe to keep the coupler seated?
And your saying that it is bent inward arounf the lip on the stock pipe?
If so we are talking what, maybe 1/4" around the edge?
And yes grindging that down/off or removing to open the area up would be an improvemnet. I find it hard to belive that it would consitute for 10hp.
Maybe 2-3 tops.
Feel free to try to prove me worng with some dyno time.

Anyway. I wont be here to defend my position man.
Off to sleep.
Pm me tomorrow if you wanna get this thread going again but i still say your exaggertaing the hp gain from it.

I know, I have to go to bed too. 10 hp? That's what I've heard on many occasions but I have never dyno tested JUST the y-pipe. Too much of a PITA to get off and on. Here's a link, look at the 3rd & 4th from the bottom photos on the page.

http://reganrotaryracing.tripod.com/efini.htm

lmfao...10 hp. You'd be an idiot to think 10 HP would be added by a PIPE. If that was the case, EVERYBODY would be changing their intercooler piping so it could use the greddy elbow...they'd probably gain close to 50 hp there(more than a full exhaust would give you)

i agree with devilish. think of it like a lightened flywheel. any intercooler piping that increases flow rate will provide more horsepower in the rpm band, but that doesnt mean peak hp will go up. you should be able to measure an increase before the switch over to both turbos as it was designed to do but when the second turbo is on there should be no difference. on a stock rx7 with stock precat and intake, i could easily see it getting 10hp. on free flowing intake, exhaust, probably doesnt make too much of a difference as the turbos are already being pushed.

https://reganrotaryracing.tripod.com/yincomp.jpg


Ok this is what iassmued you were talking about originally. Yes that is a sizeable obstruction..But 10hp? Idoubt it. But I did never notice that between the two pipes.
I see what you were getting at but it still isnt adding 10hp to your car.

I don't see where this is called for.... Tone it down or be added to the ever increasing ban/warning list.