Superjet engine question..

[John_Ciocca]

Okay on a head mounted pipe I agree...if you are running a B-Pipe you will not have any issues.

JC

 

[Mouthfulloflake]

IM not crazy, I just dont like to crack expensive parts.

http://x-h2o.com/showthread.php?t=17774&highlight=cracked+cylinder

http://x-h2o.com/showthread.php?t=4660&highlight=cracked+cylinder

http://x-h2o.com/showthread.php?t=572&highlight=cracked+cylinder

there are lots more.

You might run forever with no problem, but I wouldn't risk it.

I think of the girdle as cheap insurance.

EDIT:

you are doing the crayfish shuffle there arent you?
haha

folks have cracked them with B pipes too, FYI

Im just trying to save the guy some hassles, get a girdled head if you want more compression on a 61x cylinder, regardless of what pipe.

 

[nightrider05]

IM not crazy, I just dont like to crack expensive parts.

http://x-h2o.com/showthread.php?t=17774&highlight=cracked+cylinder

http://x-h2o.com/showthread.php?t=4660&highlight=cracked+cylinder

http://x-h2o.com/showthread.php?t=572&highlight=cracked+cylinder

there are lots more.

You might run forever with no problem, but I wouldn't risk it.

I think of the girdle as cheap insurance.

EDIT:

you are doing the crayfish shuffle there arent you?
haha

folks have cracked them with B pipes too, FYI

Im just trying to save the guy some hassles, get a girdled head if you want more compression on a 61x cylinder, regardless of what pipe.

Whats one of the better heads to get?

 

[Mouthfulloflake]

I think the ADA heads are well liked, get one with interchangeble domes, and the long studs, instead of acorn stud kit.

 

[John_Ciocca]

Whats one of the better heads to get?

I know Surfgy45. I was there when his cylinder cracked. He runs a dry pipe mounted to the head. As for the other guys....they make used deals on parts here all the time. Who knows where the parts came from?

I have about every mod you can do to a 61X motor with 180psi. Never seen that happen to a B-Piped motor. I am sure there are the exceptions but I am confident if you did not buy your motor off ebay and you know its history, simply milling the head to bump compression is a safe and effective mod.

There are thousands of ski running around like this. But insurance is fine if it buys you some peice of mind. I must admit the heads do look cool.

JC

 

[Mouthfulloflake]

dude, i posted a link where a cylinder cracked with a B pipe.

a girdled head is better. simple enough.

Ive still got that cylinder from Surfguy45.
I havent done anything to it yet.

My plan, is to epoxy/JB weld it, and girdle it, and see how long it runs like that.

 

[John_Ciocca]

dude, i posted a link where a cylinder cracked with a B pipe.

a girdled head is better. simple enough.

Ive still got that cylinder from Surfguy45.
I havent done anything to it yet.

My plan, is to epoxy/JB weld it, and girdle it, and see how long it runs like that.

Dude my point is that average Joe running 180 psi and a B-Pipe does not need a girdle kit. Is it better? Sure! A 780 Big Bore is better than a 701 but it's not required.

With thousands of skis out there modded this way with reliable results, telling a newbie he must have this or he will have a cracked cylinder is bogas...just admit that.

JC

 

[Mouthfulloflake]

Hardly.

you said the smart thing to do would be to cut the head, I argue that would be the "cheap" thing to do.

The smart thing to do would be the girdled head.

I know lots of folks run milled heads without problems, maybe they are lucky, maybe they have better cylinders, but neither of those things makes them smarter.

for you to sit here and try to convince a 'newbie' that he wont break is simply dumb.

how about you offer to trade him cylinders if his ever does break?

EDIT:

I never said WILL crack, I said greater risk of cracking.
you should read more, and argue less.

 

[John_Ciocca]

Okay...smart...dumb.....now we are playing on words and it's going to get worse from here.

I think he has enough information to make his own decision. Actually, if we stop the thread right now people can decide for themselves. Thanks for the input.

JC

 

[nightrider05]

Thank both of you for your help. Alot of facts were given to me and yes, I will make my decision from here. I will most likely be keeping an eye out for a girdled head, as I don't want to take the chance of anything cracking and having to spend more money further down the road.

 

[SUPERTUNE]

You'll need an ADA head if you have me do any build stuff. (bulletproof) Just get the ADA now and your done with it and can always upgrade engine package all the way up to 86mm bore with a set of domes and some special machine work even if you want to go to a stroker in the future...

 

[crammit442]

Hardly.

you said the smart thing to do would be to cut the head, I argue that would be the "cheap" thing to do.

The smart thing to do would be the girdled head.

I know lots of folks run milled heads without problems, maybe they are lucky, maybe they have better cylinders, but neither of those things makes them smarter.

for you to sit here and try to convince a 'newbie' that he wont break is simply dumb.

how about you offer to trade him cylinders if his ever does break?

EDIT:

I never said WILL crack, I said greater risk of cracking.
you should read more, and argue less.[/quote]

Matt's right. Cylinders w/stock compression and pipes crack sometimes. I wouldn't do any mods w/o a girdled head.

 

[Mouthfulloflake]

Hey nightrider,

this guy didnt think he needed a girdle either, with a B pipe.

http://x-h2o.com/showthread.php?t=4687

 

[nightrider05]

Hey nightrider,

this guy didnt think he needed a girdle either, with a B pipe.

http://x-h2o.com/showthread.php?t=4687

I just saw that a bit ago. Trust me, im on the lookout for a girdled head. Just dont want to dish out $300++ for a new ADA head.

I gotta purchase my footholds, lotsa glass and a few other things before I blow that much on a head..however if I come across a good used one, its game on!

 

[Mark44]

o

Hey nightrider,

this guy didnt think he needed a girdle either, with a B pipe.

http://x-h2o.com/showthread.php?t=4687

Are you guys still at it? LOL:nutkick:

Mark44

 

[Mouthfulloflake]

Nope!

:cool2:

Are you guys still at it? LOL:nutkick:

Mark44

 

[John_Ciocca]

We're cool.

I guess until you experience it yourself you can only offer your real world experiences. I have never (personally..obviously it does happen) seen a cylinder crack on a ski with only a mild compression bump and a b-pipe.

I did read back through the posts and I did miss some key points, my apologies for that.

Just for the record...I never felt like we were arguing. I just wanted to let people know that my "real world" experience has been that 180 psi without a girdle kit has worked for me for over 5 years. Just the other side if you will.

JC

 

[Mouthfulloflake]

Righto !

sorry if I come across as harsh or stubborn too, I can think faster than I can type, and im not very eloquent, so things that I think should be clear points, sometimes arent that clear to others, simply because I am unable to verbalize them.

anyway, IM running stock compression on my own 61x because I dont have a girdled head, wife does have a milled head on her FX1, with stock exhaust and it scares me to death! ( granted its only been there for a few rides, and its VERY lightly milled)

:biggthumpup:

We're cool.

I guess until you experience it yourself you can only offer your real world experiences. I have never (personally..obviously it does happen) seen a cylinder crack on a ski with only a mild compression bump and a b-pipe.

I did read back through the posts and I did miss some key points, my apologies for that.

Just for the record...I never felt like we were arguing. I just wanted to let people know that my "real world" experience has been that 180 psi without a girdle kit has worked for me for over 5 years. Just the other side if you will.

JC

 

[kevbo]

Get a 96+ 64u head if you want to modify a stock one, they are stronger castings. Use only a factory gasket with stock heads, they offer the best corrosion protection. Nobody has been able to predict when a cylinder will crack, most never crack, some will even with a girdle.