engine cooling

[fowler]

i found a CM 250 bike engine for my cart today and it is air cooled being as it is going on an off road cart and wont break 30KM much will i need a fan to stop it over heating


also is there an aceloration calc because it is all good the speed calc telling me i will do 128 km but will it get there in a day or will it even move

 

[KieranM]

nope once the air is not been restricted from reaching the cooling fins on the cylinder head.

 

[fowler]

but there is neally no air flow and reving flat strap

also it is an old engine 1982

 

[KieranM]

but will the there be air reaching you engine on the buggy to cool it? The whole idea is to not be sitting in the way, blocking the air for cooling.

 

[fowler]

it is mounted behind a seat

 

[brendonv]

Make some cowlings to direct air flow to the engine if thats the case. I hate to use this as an example but davidsfarm's kart is a good example of cowlings being used. Go to www.youtube.com/davidsfarm

 

[KieranM]

yea just fab up pieces of steel to direct air onto the engine cylinder.

 

[fowler]

sorry stupid boarding house blocked utube

 

[Kaptain Krunch]

also is there an aceloration calc because it is all good the speed calc telling me i will do 128 km but will it get there in a day or will it even move

You must be entering something wrong, you could probably get 128km, acceleration wouldnt be great, but not horrible. I would aim for around 60mph top speed in 6th (or 5th), that will be good for off road.

My kz400 shifter kart is geared for 90mph in 6th, and it has amazing acceleration, i can accelerate out of 4th from 10mph.

 

[brendonv]

Use a proxy my friend.

 

[fowler]

yes that is what i mean i cant work out the accelaration unuless someone tells me but i do known it should have good torque as it is v2

 

[fowler]

i just worked out the time on my posts are american it is 11:00pm here and i do most of my posts in the day so it must read like 2:00am on 1/2 my posts