B pipe question

[yankeeboy]

Hey, i just bought a SN superjet about 2 weeks ago, and the guy i bought it from recommended not to tune the B pipe because the screws break and are not worth the hassle and do not do much. Im looking to do freestyle so im searching for bottom end, will tuning the pipe make a difference? thanks

 

[Talsivar]

it will make a difference. but the screws lock up fairly easily. so i would check them to see if adjusting them is even a possibility.

 

[yankeeboy]

How should i set the screws? there are only two screws on the pipe piece, so which should i open/close?

 

[Talsivar]

you should have 3 screws top, middle ,and bottom. here is the info on how to set it http://factorypipe.com/t_pipetuning.php

 

[yankeeboy]

I checked factory pipe site, there should be three screws. But i checked, and theres only 2. one on top, one on the inside.

 

[marz831]

There is one on the underside of the headpipe. Very hard to get to.

 

[yankeeboy]

* your right, sorry. There are 3 screws. How can i tell which pipe i have ( mod/limited ) or doesnt it matter?

 

[adet16v]

chambers are different between the mod and limited i cant remember which is which... Otherwise headpipe is same between both.

For low end power, your gonna want the bottom and mid screws closed. Open the top screw just enough to keep the pipe cool enough so it doesnt sizzle when you splash water on it down where the coupler is

 

[freestyler888]

the mod is different the chamber is cut back more then the limted chamber so the mod has more bottom end

 

[Mile9c1]

If it runs good, you don't need to mess with the screws. Let someone who knows what it should feel like ride it, and he'll tell you if it's good or not.

 

[oxnard111]

the mod is different the chamber is cut back more then the limted chamber so the mod has more bottom end

You are right about the shapes. The mod chamber is smaller than the limited, but you are wrong about the bottom end. The limited chamber is notorious for having more bottom end.

 

[ANT]

what chamber you use all depends on your engine set up. if you don't have any porting or anything then use a limited chamber. If you get it ported, then your engine builder will tell you which chamber to use. If the screws are messed up then there are replacement screw kits made and repair kits made as well. Personally I would not like taking somebodies word for it for how stuff is set up, i like to find out for myself.

 

[Idok]

he probably told you not to mess with them because they are most likely seized up!

 

[douglee25]

he probably told you not to mess with them because they are most likely seized up!

Good point. The first thing I did with my brand new bpipe this past weekend was to take all the screws out and put a good bit of antiseize on them before I installed it.

Doug

 

[demolition_x]

what type of antiseize did you use.

i think for stainless aluminum your suppose to stay away from a few. and i think copper was one to stay away from, and thats the only one i have.

 

[douglee25]

I just used the silver looking antiseize.

Doug

 

[Crab]

Good point. The first thing I did with my brand new bpipe this past weekend was to take all the screws out and put a good bit of antiseize on them before I installed it.

Doug

Ditto:haha: , it looked like they used thread sealant paste on there.

 

[douglee25]

Ditto:haha: , it looked like they used thread sealant paste on there.

Yeah, I noticed that as well. I'm like wtf did they use this for? That stuff sure wouldn't help getting the bolts out a year from now.

Doug

 

[SUPERTUNE]

Factory pipe does that so they won't leak out on the outside of screws...

 

[douglee25]

Factory pipe does that so they won't leak out on the outside of screws...

Interesting. Good to know.

Doug