FEH Rules???

[Sonny]

I was hoping one of you fine gentlemen might be able to clear up a question or two I have about the 850/FEH class rules or lack there of. The official rules say that any service motor between 40 and 49 ci is acceptable. So I guess my question boils down to this...Is there any reason why I cant filp my 700cc/40 ci snowmobile motor up on end and run it in feh? Now I do realize that it would not be eligible for a nationals, or high points as it would be an experimental motor but could I race it? would it upset anyone?

[sam]

"service motor" refers to an outboard fishing/pleasure motor, not a "motor" in general


The rule means if company XYZ comes out with a 48 ci motor widely distributed in the US you can apply to have it become an 850, nothing else ... it does not mean it would be accepted

[Sonny]

I get it, and that was my first impression when I read the rules but I have to wonder why it doesn't say exactly that if it is to be interpreted that way? I'm not saying I disagree with you Sam but Technically, the rules don't make that distinction. Unless I missed it somewhere?

[Sonny]

Kind of a fine line, that same motor appears in the 700cc seadoo watercraft

[les]

From the 09 Mod Tech manual, Pg. 43

1. Only service outboard motor block and crankcases which meet all the following criteria are permitted.

You would need to convince the MORC that a SeaDoo watercraft qualified as a service outboard, Then you are there.

L

Reference:
http://www.apba-racing.com/Forms/200...TechManual.pdf

[Sonny]

From the 09 Mod Tech manual, Pg. 43

1. Only service outboard motor block and crankcases which meet all the following criteria are permitted.

You would need to convince the MORC that a SeaDoo watercraft qualified as a service outboard, Then you are there.

L

Reference:
http://www.apba-racing.com/Forms/200...TechManual.pdf

AAHHHH... there it is, you are correct sir right there in the first line. I was on the apba website reading the rule book and not the technical manual. Cant blame me for trying.. I see a 700 cc two stroke that advertises 120 hp I get to think'n. I Started poking around that newer technology for were the power is and I thought I could save some time but if cutting and welding it is, Then so be it..

[bh/]

Those high HP rated m/c & snowmobile motors are used in the one litre inboard class. They are not much bigger than a FEH, but must be fitted with capsules. The big hassle they are having is fitting a gear box, or variable drive system, to keep the motor on its power band. They will not go up on plane otherwise, and the same problem would arise if you fitted one up as an outboard. The Sauve's in upstate NY have been working on this for ages, and with some sucess,
and expense!

[Jerry Davids]

Sonny, Stop thinking !!!!!!!!!!!!!!!!!!!! Go to work. Jerry

[Dave M]

One Answer

You can run just about anything as an experimental engine in any class in Mod. As others said, it may or may not be accpeted.

I also think you are wasting time on those snowmobile type engines. Powerbands are a big problem to overcome. The pro's don't even mess with them very much.

[Sonny]

No, I get it... I just cant help but be a little curious, So much power in such a small package. We goof around with some drag sleds. We had one here recently that was 2 cylinders, 1000cc, and making close to 250 hp. I couldn't help but ask how it was possible. I mean the thing wasn't much bigger than a breadbox.

[sam]

700 cc alky motors are only a little less power and about the same size

[pro350hydro]

what?

700 cc alky motors are only a little less power and about the same size

Umm, 700cc Alky Motors are more than 120hp. My 350 VRP is supposedly 120hp according to Carlo Verona

The 700cc VRP's are in the neighborhood of 220hp so I've been told.

Several years ago Sandvig tried a large bore Rotax triple on his capsule, it ran good when it ran, but it would not hang with a konig.

[sam]

No, I get it... I just cant help but be a little curious, So much power in such a small package. We goof around with some drag sleds. We had one here recently that was 2 cylinders, 1000cc, and making close to 250 hp. I couldn't help but ask how it was possible. I mean the thing wasn't much bigger than a breadbox.

I referred to this ... pretty sure it says 250hp, not 120

[pro350hydro]

I referred to this ... pretty sure it says 250hp, not 120

Sorry, I got the above post (referring to 120) and yours mixed up. My bad

anyway, is what i was getting at was, a 700cc snowmobile or watercraft engine will not compete with current day 700cc race motors such as the konig, konny, rossi or vrp

[bill van steenwyk]

another source for information

Sonny:

I believe Jerry Wiendat has had experience in this area with snowmobile engines converted for outboard use. He goes by "Trident" either on this web site or BRF and could probably shed some personal experience light on the subject. I seem to remember some years ago that he had something from snowmobiles converted to an outboard and he brought it to the PRO Nationals at DePue. I don't remember seeing it run or what it did, but if you would contact him I am sure he could be a source of information.

Another person who might have some info is Pete Nydahl. I know he posts on BRF but not sure about here.

Probably your best source of information though, is the use or non-use at the present time by others, and I don't remember seeing much about anyone running one. Back in the early 70's Stan Leavendusky Sr. built an Alky "M" engine for my wife from a 100CC Komet go-cart engine.. It was very radically ported and had a VERY narrow power band. The only way we got it to work as an outboard was with the "slipper clutch" that was used on it as a Kart engine, which was where it came from. I also know When Harry ZAK was doing some work for the drag snowmobile guys, I remember him saying the engines of the time would develop a lot of horsepower but again a very narrow powerband and they used a centrifical clutch in conjunction with a belt drive to keep them on the powerband. Just like the early Grand Prix bike engines before reed valves needed at least a 6 speed gearbox to keep them in the RPM range where they developed their HP.

PETE or JERRY should be able to give you a very good idea whether the idea is worth pursuing, but as I said, since nobody else seems to be doing it, that is probably a pretty good answer right there.