Ever heard of a "PSI" exhaust?

[BBYamaha]

I bought this ski from a german guy last year and it has this weird brand pipe on, i have googled it and searched boards came up with natta. ever heard of it? has PSI stamped on it, is a two piece pipe, exhaust manifold and the pipe itself...

Its a superjet, had the 650 when i bought it has the 701 now runs great just curious

 

[WaveDemon]

post a pic. are you sure it's not PJS?

 

[BBYamaha]

will get a camera tomorrow when some people wake up, its a black pipe and not really big like the type 4 or the type 9, I am 90 percent sure it says psi cuz I have been lookin for info on it since i bought the ski

 

[crammit442]

They made pipes for a while back in the day. They do snowmobile stuff now.

http://www.psipowerinc.com/34696.htm

 

[Motorheads5]

yeah I've got a psi pipe on a 587 doodoo xp they made pipes for the snowmobile market

 

[BBYamaha]

thats awesome, thanks!!! gonna dig around there for awhile and see what i can dig up

 

[nightrider05]

Yea I have a PSI pipe from a Seadoo 587 also.

 

[WFO Speedracer]

My X2 did have a PSI pipe on it,I am running a PJS pipe now,both are three piece pipes so they have some adjustability.

 

[Mike W]

I had one on my old SN when I bought it and from what I was told back then it was a 650 pipe. It made the 650 run great but I was told not to use it on a 701 when I did my engine swap.

 

[Swooperjet]

I had one on my old SN when I bought it and from what I was told back then it was a 650 pipe. It made the 650 run great but I was told not to use it on a 701 when I did my engine swap.

Hmmm. I have a PSI on my SN right now. It was on my 650 also, but I ported it and am currently running it on my 701. It made the 650 run great like you said....but it makes the 701 run pretty darn great also. Real good low end.

 

[Mike W]

Hmmm. I have a PSI on my SN right now. It was on my 650 also, but I ported it and am currently running it on my 701. It made the 650 run great like you said....but it makes the 701 run pretty darn great also. Real good low end.

I never ran it on my 701 because I was told it was a 650 pipe. I was just getting into standups back then so I was still new. Being that you ported it I'm sure that was all it needed to run on a 701.

 

[BBYamaha]

what do you mean by 3 piece? Mine has a black manifold that curls around to the top and it stops and has a coupling and then connects to a pipe. I thought the b pipe was a three piece, exhaust manifold, head pipe and the pipe itself, as for performance it seems to run good but I have nothing to compare it to..

like in this pic
http://cgi.ebay.com/ebaymotors/Fact...006QQitemZ160229852329QQrdZ1QQsspagenameZWDVW

will get a pic up pretty soon...

 

[BBYamaha]

here are the pics

 

[WFO Speedracer]

Three piece as in three seperate pieces.The exit cone is not visible in the pics.

 

[BBYamaha]

mine is diff from that... same finish though...

 

[WFO Speedracer]

Well this pipe is on a Seadoo engine,yes it should be quite different.

 

[orangefinger]

Your pipe looks like a pro-tek pipe I had for my 650...??

 

[BBYamaha]

...ok just looked again the pipe actually doesnt have psi in it just the exhaust manifold...