Does anyone know the horsepower of a stock:
1) Rubicon
2) Foreman 450
3) Rancher 350

thanks!

 

if you go to dynojet's web you'll find graph's'they claim the 450 has 12hp at the rear wheels'now wether that's a misprint or it's because it's a fulltime 4by4 and it loses/uses up alot and that's what it is.

 

Certificate for my 450 Foreman says 23.9 H.P.

 

certificate? is that 23.9 at the crank?,or the rear wheels?

 

Certifcate? Where do you get that? My H.P rating is not listed anywhere that I see.

 

By certificate I think he means his title. Some states print the HP on the title. Mine does not.

 

My 'certificate' (title?) for my 400EX says 34hp, which is at the crank. As most us have seen on dyno charts for stock 400EX's, they put out about 27hp at the rear wheels. Rear wheel horsepower on most vehicles is about 70% of the horsepower at the crank (30% parasitic loss through turning the drivetrain and tires).

 

"Certificate of origin for a vehicle" I don't have a title because I never registered with the state. This is what the dealer gave me when I bought the fourwheeler new. It says H.P. (S.A.E) 23.9 I don't know if that means at the crank or the wheels. I assume it would be the same as saying a 350 Chevy has 275 H.P. What does that mean?

 

I don't know when the exact cutoff date is, but sometime in the mid '70s, auto manufacturers switched from measuring the HP at the crank, to measuring it at the rear wheels. That's why you see current mustangs/cameros, with their rated ~250hp turing in the same 1/4 mile times as the old 60's and early 70's muscle cars rated at 350-400hp.

I'm pretty sure the HP rating on your paperwork is at the crank, because as I said, my 400EX paper says 34hp, but every dyno run I've seen says from 25-27hp at the rear wheels.

 

The HP ratings of cars are still at the crank, the difference is that the mid 70s and earlier cars were allowed more room to manufacture a higher HP rating than the car actually had because there was less government regulations on how the testing was done. A couple of differences is that the ratings today are thru the exhaust that a car is going to use with everything else being the same as when it goes into the car including all belts, pulleys, pumps and etc. Back then, it could be done with open headers, different timing, no uneeded belts, open air element and whatever else that they could do to get that "stock" engine up to a HP rating that looked attractive to the buying public.

The Rear Wheel Horsepower on say a Mustang rated at 250hp is around 185 hp at the rear wheels.