will a m8 motor fit in a m6 chassis?

[stihlhead82]

I have a 2005 m6 that I feel will be underpowered out in the steep and deep, and by the time I put the money into a 700 top end I could buy a used 800 motor. Just wondering if this is a bolt right in or is there some fabbing involved? If it bolts in what years will fit? Thanks

 

[smokindave]

No it won't work,totally different motor mounts.Big Block or a new sled...
You could put a m7 in it and big block to a 800 or even a 925

 

[stihlhead82]

Thanks, the answer I've been looking for

 

[mortelec]

No so fast. Yes it will fit. I've got a 09 800 in my 05 M6 bulkhead. I'll try to find more pics.

 

[mortelec]

Mag side bracing bracket this is on both sides of the bulkhead.

 

[stihlhead82]

Damn, that 800 looks good in there! I'm not the most mechanically inclined guy, but have a decent idea, how hard was this to do? Minus the complete motor, what was your cost if you don't mind me asking?

 

[mortelec]

Sorry I can't get any pics we just moved and it's stowed away until snow. I pretty much built the sled and collected parts over a year. I put in a complete 09 800 from a wrecked sled also the wiring harness and ECU from an 09. I used the original pto side mount and added an extra brace, found the front mount used that bolts to the motor and clamps around the sway bar tube. On the mag side I put on a couple 1/4" aluminum plates and sandwiched them on the brace. Here is a pic of that I found. I wouldn't say it's very cheap but if you have the time to hunt around for parts it's not too bad. Any other questions let me know.

 

[Mjunkie]

Something to think about is that if you want it to be a STOCK pull and go sled, you'll need to buy electrical things as well. ECU's are not cheap not to mention either all new wiring harness or a major pain in the a$$ trying to use your m6 harness (which I wouldn't attempt). If you're not afraid of a ”modded” motor, just big bore or turbo the m6 and it will save you a LOT of work. You don't have to change it to a m7 and then big bore. Cutler has a 800 or a 1000 big bore that will fit on the m6 bottom end (and I'm sure there are others), or there are turbo kits out there.

 

[mortelec]

I found this motor with a couple hundred miles on it for $1,000 complete.

 

[mortelec]

Something to think about is that if you want it to be a STOCK pull and go sled, you'll need to buy electrical things as well. ECU's are not cheap not to mention either all new wiring harness or a major pain in the a$$ trying to use your m6 harness (which I wouldn't attempt). If you're not afraid of a ”modded” motor, just big bore or turbo the m6 and it will save you a LOT of work. You don't have to change it to a m7 and then big bore. Cutler has a 800 or a 1000 big bore that will fit on the m6 bottom end (and I'm sure there are others), or there are turbo kits out there.

Exactly I went back and forth on big bore vs stock 800. I had the time so I went stock 800.

 

[scootdog]

I'm running a RKT m7 BB runs great on stock pipe no controller. Pretty much bolt on and pull and go. I have a speedwerx pipe I might try this year but then I need a fuel controller.

I'm pretty sure m6 has same bottom end, if you check the swapmeet you'll find a used BB kit sooner or later. Just food for thought. BB might be easier then stuffing a 800 in there.


Found this in the swapmeet. 900 BB
http://www.snowest.com/forum/showthread.php?t=354914

 

[Rixster]

I found this motor with a couple hundred miles on it for $1,000 complete.

Not bad, now go find out how much all the electrical is going to run ya. Cat wants $1500 for a ecu. I have no idea what the CCU will cost ya, plus a full wiring harness. I am sure you can find all these parts used, if you are patient. Still a used ECU is going to be $500 range.