performance for bigger engine

[Rotore]

how many rpms could my engine handle its a 25hp Kohler commando, 725cc, twin cyl, OHV, w/ pressure lub.

here are some piks:

 

[freakboy]

5000 at most i dont bring my twin anyhigher then that. but with that engine it gets a but load of torqe so you can gear ur kart really high so you get a good bit of speed and about the same exccel as you would with a smalller engine geared lower.

 

[Rotore]

how high could i gear it? 4:1-3:1?

 

[freakboy]

Probaly im not good at gearing you would have to ask someone else about that.

 

[Rotore]

lol ok

 

[NJOHC]

A lot of it depends on how heavy your kart is. Id gear it 5:1 and rev it to 4000RPM. But thats just me lol

 

[Rotore]

A lot of it depends on how heavy your kart is. Id gear it 5:1 and rev it to 4000RPM. But thats just me lol

my kart is about 230lbs with the engine and im 220lbs so it'll be 450lbs w/ me on it.

im going the probably use 18 or 20 inch wheels so 5:1 or 6:1 should get it moving right?

 

[NJOHC]

With that kind of power Id go 5:1. With that you'll have good acceleration and top speed. And if you dont like the acceleration you get you can always play around with what you like between 5:1 and 6:1. Im going to gear mine 6:1 and I only have a 9hp motor. It also depends on where you ride. I go through a lot of deep sand and I prefer really quick acceleration over top end. But I think youll be really satisfied with 5:1 with an engine like that. Good luck! I hope ya post up some vids of it, Im interested to see how it turns out!

 

[Rotore]

With that kind of power Id go 5:1. With that you'll have good acceleration and top speed. And if you dont like the acceleration you get you can always play around with what you like between 5:1 and 6:1. Im going to gear mine 6:1 and I only have a 9hp motor. It also depends on where you ride. I go through a lot of deep sand and I prefer really quick acceleration over top end. But I think youll be really satisfied with 5:1 with an engine like that. Good luck! I hope ya post up some vids of it, Im interested to see how it turns out!

awsome dude will do.

 

[1992suburban]

how fast do you want it to go??? you got a number in mind'?

 

[Rotore]

Atleast 30 maybe faster depends on accel

 

[1992suburban]

use that calc tool me and Anderkart like so much.. if you use a tq convertor and jackshaft your options are endless..

I wouldnt turn it much maybe 5k and use gearing to make up the diff

 

[Rotore]

Will do

 

[Kenny_McCormic]

3600rpm, exactly what it was designed for.

 

[Rotore]

Can be built to rev higher