Auto

Manual

 

Aahh, very interesting, thank you.

 

The graphs, like the Bible, may "Say It All;" however, each requires some interpretation, in my opinion.

Dynojet could help by reporting horsepower vs. rpm, instead of horsepower vs. mph. Mph confuses the issue considerably with automatic transmissions; notice how different the curve profiles appear for essentially the same engine, but with manual as contrasted to automatic transmission.

My recommendation: let's stick with horsepower vs. rpm charts, comparing apples to apples. Even with a manual transmission quad, the horsepower vs. rpm presentation loses some specificity if the gears chosen during testing are unknown.

Dynojet, could you please provide horsepower vs. rpm data?

O.K., so, once again I've made a post that doesn't make any sense. Just compare the shape of a manual transmission horsepower vs. mph curve and an automatic transmission horsepower vs. mph curve, and see if they look like the graphs were generated by similar animals, nearly identical engines. They were.

I rest my case.

Tree Farmer

 

DynoJet's response to my letter on how and why?
1. SAE Corrected means that a correction factor has been applied to the
results to get a power number that is comparable to other dynos in differing
climates and conditions.

2. We do not have a 4wd ATV Dyno. We do have a 4wd car dyno and we measure
the output of the front and the rear wheel systems. This is done at the
wheels only. It will give you front, rear and combined wheel horsepower.

3. I have no idea what Honda does with their dyno. All of our dynos measure
the output of what ever is spinning the drum. In the case of a motorcycle,
that is one wheel, in the case of a quad it is both.

4. I am not familiar with their testing but a motor optimized for torque
will show, in some cases, less horsepower than one optimized for horsepower.

 

What is the question here? What is trying to be determined exactly? Auto vs. Maunal? Suzuki vs. AC? let me in on it.

 

Andy,

That depends. Who's post are your referring to?

 

An increase of 2.4% for how many dollars? Do they think we are morons? (Wait, The rest of this thread will explain that. )

Whatever it cost, I do not believe that it would be worth it for a 2.4% power increase.

 

Thor

You'd be surprised what that 2.4% can do to the seat of the pants. I've seen a Sportsman 500 go from barely being able to get the front wheels 1 ft off the ground to being able to get them up about 3ft off the ground after that little 2.4%gain from a Dynojet kit.

 

Yours. What is the thing here, the minimum gain or what? I bet it helps to have the filter and pipe along with it. I wonder how long it will be before they make a needle jet for a manual 500? Highlifter says it shouldn't be too awful long.

 

Well I was showing the difference in power between the Manual transmission and the Auto. For everyone that said the felt the Manual had more power I was helping to back them up with actuall findings.