Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions

In the true spirit of the Toolman, I am always looking for a way to increase my snow blower horsepower. I came across a company that sells karting engines & supplies. They claim that if I send them my HM100, they can add their hop-up kit and increase the horsepower by 3 to 5 HP, without affecting reliability. I was clear that I'll be using it on a blower not a kart, but I haven't been able to find out exactly what it is they do to the engine. Cost is $135 + shipping one way.
Does this sound reasonable or too good to be true?

Cheers

I specifically told him that the motor would be on a snowblower that would be running up to 60 minutes at a time & I wanted to maintain the reliability and keep the hp increase in the 3100 to 3500 range where I'll be using the machine. With respect to a high compression head, I was thinking of bringing mine to a shop to get a little shaved off & accomplish the same thing. I'll have to research & find out what kind of clearance there  is valve to piston. I've done the polishing & port matching on a car engine but I was wondering how much of an effect it would have here since the passages are relatively short. There already is a sort of intake manifold on the HM100, but I suspect it's more to put the carb in a more convenient location for the shroud to keep things warm. I wonder if a straighter longer manifold would help low end torque as you said (but then I'd have to play with governor & throttle linkages)?

Anyways, thanks for the info & I will start poking around the karting forums to see what I can learn.

Cheers

Yeah. Let us know how it goes. Very interesting stuff.

Clearance of valve to  head------.... You can take it apart and put modeling clay over the valve on the head , bolt it back together and then after pulling through the rope slow a few times, take it apart and mic the Clay's clearance...( to see how much you can shave....

Or you could have the head filled in over the piston a bit...

Friiy