Estimated H.P. required

[C Elliott]

I know this all depends on sleigh design and track conditions but I am curious as to what you guys think would be adequate horsepower to pull 6 mph at 5000 lbs with 18.4 x 38 top cut tires. Would 150 hp be enough?

Thanks
 

[bobidan]

i would think that would be enough on any track
 

[Mopower]

I run 100 horsepower in 5500# at 4&5mph on bigger 16.9X38. It's just a bit weak if you ask me. I place consistently, but it's on a pretty easy going sled with a 5-6ft chain. I'd be happy and back in 3rd gear territory with 125 hp. With 18.4, tough sled, short chain, 5000#, and 6mph, 150 would be quite comfortable.
 

[DAVE Thompson jr]

My Farmall is not much over 150 hp and I can run 6mph with full cut 18.4 tires in that weight class. I would think that that would be plenty of power for what you are planning on doing.
 

[Gold Digger]

You must be talking about 4 and 6 cylinders.
I need to see videos of 2cylinders at that weight and speed that will finish in the top 1 or 2 most of the time. Thanks. Stephen
 

[C Elliott]

Continental 4 cylinder, 4.75" bore x 7" stroke. I was told the engine was on a dyno and showed 147 hp after extensive head and manifold work. Engine was built by Lemmons.
 

[brentp4455]

should be big enough. just make sure theres enough carberator for it. thats where a lot of builders seem to fall short. also another .25" of stroke wouldnt hurt.
 

[Mopower]

From what I've seen, head and manifold work are the key to getting those Masseys to run.