B pipe question

[JonnyB]

he said he JUST bought it....
the stock head is fine as in safty if your thinking about the cyl cracking. Your not running a dry pipe so your RPMS wont be really high so no need for a girdled. But would it be a good idea down the road YES. Also you wont have great bottem end with out the comp. If money is the issue then b-pipe for now and then do the head if money isn't then do both now

 

[Gainera2582]

Ive ran the bpipe with stock head and an msd ignition(more important than the head imo) and it hits really hard at 150psi!!!!!

Ill be bumping my compression up next week to 170psi with an ada girdled head, so I will let you know how it goes!!!!!!

 

[FLY6584]

Ive ran the bpipe with stock head and an msd ignition(more important than the head imo) and it hits really hard at 150psi!!!!!

I know you're a big fan of the enhancer and I agree they are a good mod, but they are nothing like increasing your compression. A girdled head would be higher on my list than an enhancer for sure(as long as you had a modified stock cdi).

I guarantee you are going to be impressed with the compression increase. Go up to 185 though. You'll be fine running on pump gas as long as you don't run WOT all the time and the boat is jetted properly. Hell I know Chuckie sets up some of his Team Scream motors at 200psi and they run pump gas all day long. I guess it's all in how you set it up. I think you'd be safe going with 185psi though. just my opinion and my knowledge is limited to what I've heard from talking to others.

 

[brett]

my motor is completely stock except for a b-pipe.
its perfect.
for the surf.

 

[Charlie701]

he said he JUST bought it....
Also you wont have great bottem end with out the comp. now

What is the comp.?

 

[FLY6584]

What is the comp.?

Stock I think you should be at about 145psi.

 

[brett]

im at 139 and 138.
i ve heard stock has run from anywhere between 130-150 is stock range

 

[Charlie701]

got ya Thank you. And as far as jetting goes just put new plugs in and take you ski for a spin and then check out the plugs to see if you should go more lean or more rich?

 

[Waste Land]

got ya Thank you. And as far as jetting goes just put new plugs in and take you ski for a spin and then check out the plugs to see if you should go more lean or more rich?

Actually, using older plugs with carbon is a better choice because they will turn easier then having to wait for new plugs to darken.

If your running stock setup with b pipe FP has the jettings required on their site

 

[stanton]

im at 139 and 138.
i ve heard stock has run from anywhere between 130-150 is stock range

you should really let me deck your head. it would take me a half hour tops and your ski will have more brap! ten thou for starters.. cmooooon!

 

[SJ Thumpa]

One of my ski's runs stock head and B pipe. The other Riva head and dry pipe (none girdled) IMO, Run it, tune it and change it when (and if) you want to.

 

[Marshj]

I run a b-pipe, stock milled head, and MSD...its all you need to learn a LOT..even for flatwater...if my cycl cracks...bummers

 

[Marshj]

ps..been running this setup for 3 years. night.

 

[SJ Thumpa]

Hi, Wasteland.

I wondered whether that was possible.
Thanks for posting that. So if I run over carboned (dark) plugs and wish to retune, can I regain a true reading by running those over-carboned plugs for a while and hopefully getting them to read right (a lighter color) by minor tuning?

Am I right?

 

[teton]

Why use the stock pipe, if you already have the B-pipe???

The stock cylinder head is ok, but a girdled head is a good upgrade. It's a must if you are going to have the cylinder ported.

why is it necessary to run a girdled head with a ported cylinder?

 

[SUPERTUNE]

Ported cylinders (IF done correctly) makes more horsepower, this makes more combustion pressure then the cylinder block are more prone to crack at the base from the extra load.

 

[TheLostOtter]

Hi, Wasteland.

I wondered whether that was possible.
Thanks for posting that. So if I run over carboned (dark) plugs and wish to retune, can I regain a true reading by running those over-carboned plugs for a while and hopefully getting them to read right (a lighter color) by minor tuning?

Am I right?

You should be fine as long as they are not fouled plugs. I just retuned my ski the other day with plugs that were over a year old. They had a little carbon buildup before the tuning. After all the WOT and adjusting the high speed screw, I got them looking great, with little to no carbon on them anymore.

 

[snowxr]

why is it necessary to run a girdled head with a ported cylinder?

The ported cylinders have material removed in ares that leave it prone to breakage. Most builders also suggest higher compression, which puts more stress on the cylinder, and leads to either cracking the base of the cylinder where the studs are, OR cracking about half way up the cylinder where the porting has thinned the casting.

 

[Charlie701]

Thanks for all the help!! I'm looking for a gridle head. Thanks again.

 

[Charlie701]

Thanks for all the help!!