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larry(at)macsmachine.com
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 Posted: Sun Dec 30, 2007 12:45 pm Post subject: Trying an unproven engine - is it feasible, is it safe? |
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LRM,
I'd recommend you purchase the engine, wiring harness and parts from the
dealer or from a damaged snowmobile and save the premium paid and lost
on excess parts.
You've got the right idea though. Set up a test stand and work up the
running power, engine mount and re-drive and establish a whole new
conversion package.
There's no reason it couldn't be done.
Best of luck,
Larry McFarland 601HDS at www.macsmachine.com
do not archive
LRM wrote:
[quote]
Before I got an offer I couldn't refuse on all my VW stuff, I looked
real hard at the Yamaha Genesis 150 engine. It's a 4 cyl fuel
injected 150 hp engine. Here was my thinking. I like 4 cylinders vs
3 because it would run smoother. I've had enough recent experience
with rough running engines to last me a life time. I even got and
studied the wiring diagrams and concluded that it would be easy to
convert. The only sensor I would have to trick is the rollover one.
The rest of them are O2, altitude, you need them anyway. You really
wouldn't have to trick the rollover sensor, just don't bank or fly
upside down. These little engines are designed to run at altitude, no
icing, no carbs. I really can't think of a better natural conversion
for an airplane. The 150 hp is very misleading. That's at around
8,000+ rpm and you don't want to run that very long. Max should be
about 6 with a 2-1 or better re-drive. I'm guessing you would get
around 100-110 hp. Building the PRSU shouldn't be a real challenge.
Somebody probably has already built one. The way the trans is set up
it would be lend itself to a belt drive quite well. I was going to
cross that when I got there. My plan was to buy a brand new
snowmobile, they are about 10k. Strip out the engine and wiring
harness/sensors, sell the rest on E-Bay, hopefully get a couple of grand.
Those are just my thoughts and 2 cents worth.
To me what I discussed above is what this "Experimental" is all
about. Too bad they don't have a "Fake Experimental" for some folks.
Yep, I know I'm a smart ass. LRM, www.skyhawg.com
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Joemotis(at)aol.com
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AB_Summit
Joined: 16 Jul 2007
Posts: 23
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| Posted: Sun Dec 30, 2007 2:18 pm Post subject: Re: Trying an unproven engine - is it feasible, is it safe |
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I know of one 150FI engine for sale right now for $2500, or $3250 with all of the EFI hardware.
I agree with your post LRM, about the smoothness of the 4 cylinder version, I've owned this engine in a 2006 Yamaha Apex and it is definitely a smooth running engine. I also think the case is better for adapting a redrive to than the 3 cylinder version.
Come to think of it, I know where you can get a Genesis 150FI engine for free... on Feb. 4, 2006 I was riding my snowmobile in the mountains of British Columbia when a cornice broke underneath me and my snowmobile and I fell 265 ft. I broke my leg in several places and tore every ligament in my knee and laid there overnight because my riding partners couldn't get to me. I was helicoptered out the next day but my snowmobile was never recovered. Maybe I should auction off the GPS coordinates to the highest bidder? This was the accident that put my flight training on hold, haven't been flying since due to the financial effects of the accident. Here's a media report of the incident if anyone's interested.
http://www.robsonvalleytimes.com/index.php?option=com_content&task=view&id=325&Itemid=67
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