Even if the engine has the broken components replaced and is able to run again, do you think that you'll be able to trust it? I'm guessing that other engine components were stressed pretty high during the seizure...

 

Good Point !
I know that someone BETTER check out "ROD" 100%,..
good chance of rods being bent after a Hydrolic..
After all it did sheer off wrist pin .........

 

That's a pretty nasty looking bunch of parts there, I feel for ya but there's always some risk with this type of thing. What octane fuel were you running and was it very old. My guess is a major detonation event that broke the skirt off the piston from excessive pressure at the exhaust side of the piston dome. With the skirt gone the dome could rotate in the bore and your wrist pin snapped from dome contact with the head. I'm sure the rod is history, the engine should be completely disassembled and rebuilt, especially the crank or research the prospects of a different motor installation with the hp #'s your looking for already engineered into it. I would think that one of those high hp crotch rocket motors could be willed into that frame if you have the patients and a lot of ingenuity. For the money you will have to sink into your stock motor it might be something to contemplate, I know I would. Good luck to you which ever way you go.

 

Organdonor, I'm really sorry that happened man! I hope that in a few months you will be saying that it was the best thing that could of happened to you, and that your 760 is AWESOME(especially with your twin 38mm Alcohol carbs)[img]i/expressions/face-icon-small-wink.gif[/img]

Anyways, sorry dude!

Biggerisbetter.

 

Well I think I have pretty much decided(with the help of others) the the motor was hydrauliced (too much fuel)
The engine couldn't compress that much raw fuel and snapped the wrist pin and rest was history. All this was due to the bottle pressure being low! Nitrous newbees, learn from my mistake!
Thanks for everyones concerns and there help. The DS group is a good one!

 

Hmmm! Too much fuel causing a hyd. lock? Well if that is the case then it will happen again the next time you hit the button, with or without the no2 bottle on because it would take alot of extra fuel to hyd. lock a piston. Alot more then you need for your nos setup. I've seen hyd.lock many times before and it usually bends or breaks the rod with very little damage to the piston. The reason for this is when the cylinder fills with fluid and the piston attemps to compress it, the fluid is evenly distributed over the top of the piston puting even pressure everywhere and keeping the pistin straight. The rod, not yet reaching TDC, is still off to the side and much more fragile then when its seing the stress of cumbustion. Not saying its not possable but if you suspect that then you need to triple check all fuel related components to ensure proper fuel delivery.
Another possability- The extra fuel washed the cylinder, causing the piston to seize, break the skirt, rotate and hit the head.....

What ever the cause, it looks like the piston didn't hold up as well as it should have, for a forged piston, and it was the first failure.
My .02 from what I got out of the pics.

 

Ithink the piston went first also.

 

I have good news and bad news. The bad news: 1) The rod bearing is probably toast, mine went after overheating it and losing a head gasket, after putting it all back together again. Note: Mine checked out fine using the tests that Bombardier recommends. 2) The price for cranks from Bombardier just went up, they are now available for the bargain price of $750 or so. The good news: Bombardier has just released a crank rebild kit which was not available when mine went out. It's only $500 or so.

Buy the big kit from Knutz, your going to spend half that much getting it stock again, so bite the bullet, take out a lone and go big bore and make me jealous.

 

What you don't see in the pics is the wrist pin is completly sheard off on the one side of the piston from trying to compress to much liquid. Then have the engine run a little on the nitrous with half a wrist pin this is what you get.

 

Hey ....put a giant 2 -stroke in it.......he he he...less parts to break nextime ,...he he he would be, a one-of -a - kind...DS! LOL