I want my 550/750 conversion to backflip. Help and give opinions

Location
macomb
Hey guys my goal is to backflip my 550/750 conversion ski/ highly nodded hull. More info on that build in my thread. Look it up if you wish, the hull is capable of a backflip, IMO the engine is not
 
Location
macomb
Here's what I plan to do to the engine/ what's already been done/ and some info. This is a 750 sxi big pin motor, bored to 780. It is a fresh rebuild, maybe 2 hours on engine. Fresh bore and hone. It has minor cylinder porting, ported and bored out west coast exhaust Mani, new seals and gaskets everywhere, mariner head, dual stocker carb set 40's keihin. Stock flywheel, stock timing, only running 150 psi wtf?? Had it bored and rebuilt by a guy that was supposed to know what he was doing, hes been doing it for 30 years. Any who I'm planning on a billet ADA head with 24cc domes, boyeson reeds, aluminum flywheel, opening up the 650 west coast exhaust Mani to 50mm on the Mani and 50mm on the exhaust to match it, any suggestions? Also putting on a impros hooker, I'll talk to them about what pitch I'll go with, they are - after all - the impeller pros. Lol
 

Quinc

Buy a Superjet
Location
California
I think you are going to be burning through a lot of cash to try and make this thing flip. You might think about enjoying it as it is and start saving money for a used B.O.B or Backie Chan.
 

stagesrt4

see ya out there
Site Supporter
Location
St Charles IL
Yea the JS hull simply isn't a freestyle hull

You can mid ski n make it a fun lil more capable but don't expect great things

I own a foot rocket n it's still hard as he'll for me to pull around a flip
 
that 550sx hull u built right? thats sick btw! id say u could do it for sure with 750 in there! but id think u def need the bigger pump in there if u haven't already!!


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Location
macomb
Ok guys thus isn't near a Js hull anymore. It cuts back -6in, 650 pump cavity, widened 2in on both sides in front, hardcore rocketed nose, footholds, carbon fiber reinforced, ext. It is very similar to an am hull, just maybe 30 lbs heavier. Its capable of a backflip, given trim and correct motor setup.
 
Location
macomb
that 550sx hull u built right? thats sick btw! id say u could do it for sure with 750 in there! but id think u def need the bigger pump in there if u haven't already!!


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no, you're thinking of mobile Chernobyl's build. Mine is super similar though, I just have alot bigger pump and engine :p
 
Location
macomb
that 550sx hull u built right? thats sick btw! id say u could do it for sure with 750 in there! but id think u def need the bigger pump in there if u haven't already!!


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planning to pull 130hp from this 750 motor. Isn't impossible, very do-able IMO
 
Location
macomb
And BTW everybody, I do have a really bad ass an superjet too :pthis conversion ski is my freestyle ski though, superjet is al around fun ski.
 
planning to pull 130hp from this 750 motor. Isn't impossible, very do-able IMO
Idk what you're smoking but it must be some strong sht, a 1100 outputs 120 hp, that's your engine with another cylinder. And a chamber that stock lets the engine breathe very well... I guess everyone can dream


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Location
macomb
Won't let me paste link. Look under 300/440/550 threads and its like halfway down, called ONE OF THE BEST 550/750 CONVERSIONS
 
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