- Location
- colorado
ive read alot about people using blaster b pipes on superjets.do they just bolt on or do you need to modify the pipe? do they use the same manifold?
blaster B pipe on a RNSJ?
- Thread starter rkymtnrider
- Start date
- Location
- Strathroy Ontario Canada
The manifold and head pipe are all the same for the yamaha 701. They also work for the 760, you just have to drill the manifold bolt holes a little bigger.
The blaster limited chamber will not just bolt up on a super jet. I think it would work if you did a little cutting and welding. I think the blaster mod chamber will bolt right up on a super jet.
The blaster limited chamber will not just bolt up on a super jet. I think it would work if you did a little cutting and welding. I think the blaster mod chamber will bolt right up on a super jet.
- Location
- colorado
what would be the cons of using a blaster mod pipe? ive got a 99 sj,BTW.
- Location
- Strathroy Ontario Canada
Well, I think the limited pipe gives the best very bottom end. The mod pipe is probably really close.
What do you have on there now?
What do you have on there now?
- Location
- colorado
stock exaust, R&D head. no clue on dome size, compression around 135psi @ 8385 ft above sea level. 150psi @ 5328 ft above sea level and an R&D power plenium air filter.
- Location
- Strathroy Ontario Canada
Ahh, yeah you are going to want to get rid of that stock exhaust. Do you have a blaster b- pipe that you want to put on your sj?
- Location
- colorado
no, not yet. but came across one on e bay.i would like to upgrade the exaust, but i dont have alot of money at this point. i just installed a new SLP pipe on my snowmobile and that set me back pretty hard. i will be keeping an eye out over the winter, but every time i see a b pipe for the superjet everybody and there brother seem to jump on em. the blaster pipes on the otherhand, seem to have less interest. i think wax and octane are having a contest to see who can aquire the most b pipes!!!J/K!!
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- Location
- Strathroy Ontario Canada
Ha Ha
Yeah, you would be better off to just get a sj chamber. The blaster pipes still sell pretty quick too. You will pay about the same price either way. You should be able to scoop one over the winter.
Yeah, you would be better off to just get a sj chamber. The blaster pipes still sell pretty quick too. You will pay about the same price either way. You should be able to scoop one over the winter.
I am currently running the B1 mod chamber on both skis. Both are 62t cases, one being a 760 and the other is at 730. I ran a SJ mod chamber forever and recently switched to the B1 stainless mod chamber. I had to do some convincing to clear the tank and the hull. It hits like a mule and I like it better for low end punch. I did not notice any top end loss either. You need to get your compression up to around 180 and get that B pipe. You will notice a big difference. I'm thinking night and day:Banane09:
keep his elevation in mind..... would 180 at 8500 ft be a nono w/ pump gas?
I know that Gloryfreestyle and RMBC have talked about how crappy their boats run at their elevations in CO. I was thinking that before Neil built his lameys and strokers that he had to run small domes to get the compression up but still ran 93 octane. Even with that they talked about the boats still did not run nearly as well compared to lower elevations. I think the biggest concern would be having to run 110 octane if you ever dropped off the mountain.
Matt, is that because of the combustion chamber size or is it the squish that would make it a no no? I think you are right about the octane requirements, seems like I heard them talk about no 93 available now that you mention it.
- Location
- colorado
hey keefer, got any pics with that pipe? just wondering how much "convincing" is needed and if its worth the savings.the blaster pipe is a limited and up for auction.FFP has an "upgrade" kit for 250.is the stainless steel chamber alot heavier than a limited SJ pipe?
- Location
- colorado
that is correct. the highest ive seen is 91
- Location
- colorado
imj guessing that the compression is at or above 180 psi @ sealevel
I think that you should be able to run whatever gas you run at sealevel for equal compression measured on the gauge.
I.e., if you measure 180psi (35cc domes) at sealevel, and you measure 180psi in the mountains (33cc domes), you should be able to run the same fuel.
There is less air at the altitude, hence less compression for given dome size.
You're not changing the volumetric ratio of the fuel air mix....you're just decreasing the efficiency of the motor (hence power loss).
I'm probably wrong though.
- Location
- colorado
is there a way to find the dome size W/O pulling the head? do R&D heads come w/ interchangable domes?