electric cooling fan

PLUMMEN wrote:

im trying to find something capable of pullng cooler air across topside of motor,any suggestions?

I use a box floor fan when I have to run the engine stationary. Probably too big to mount... and that extension cord would be expensive depending on how far you commute.

ive got a 48" commercial fan that works good for cool downs at the track bu following a truck with a fan and a generator all day would suck!:laugh:

This thread may be of some interest

kzrider.com/index.php?option=com_kunena&...83164&catid=2#183164

I posted it a while ago. It is my second season with this modification and it works great. This bike is my daily driver. The fan has made a big difference in city traffic during the summer. I will make this modification to any future street KZ motor I build.

COOL!

davel wrote:

This thread may be of some interest

kzrider.com/index.php?option=com_kunena&...83164&catid=2#183164

I posted it a while ago. It is my second season with this modification and it works great. This bike is my daily driver. The fan has made a big difference in city traffic during the summer. I will make this modification to any future street KZ motor I build.

i remember seeing that someplace just couldnt remember where!thanks i wonder how that would work if i used it as puller rather than a pusher and mounted a fan on behind the motor ?rather than trying to push jello through a straw as i heard one guy call it before ,its a lot easier to suck it through!:laugh: my turbo is going to be mounted behind front wheel so it wont pull air away from intake and there should be plenty of room to mount it that way.

PLUMMEN wrote:

i wonder how that would work if i used it as puller rather than a pusher and mounted a fan on behind the motor

Hmm...The fan can be wired to run either direction but you might need a fan shroud to ensure it draws air through the engine rather than around it. Also, the hottest part of the engine is the exhaust (front) side. If possible, you'll want to blow air directly at it...Let us know what you come up with and how it works.

my biggest problem with pulling air directly off the exhuast is youre pushing that hot air right into the motor,im trying to pull cooler air through over top of motor which is the hottest part of the actual engine.ive got my pistons and combustion chambers and related parts coatedwith piston coat already to help with heating issues.

PLUMMEN wrote:

i wonder how that would work if i used it as puller rather than a pusher and mounted a fan on behind the motor ?

It will work very poorly because the airflow to the fan's inlet will be starved so it won't be doing much of anything.

PLUMMEN wrote:

im trying to pull cooler air through over top of motor which is the hottest part of the actual engine

Yeah, the head is definitely running hot and it would be good to get a large volume of air pointed directly at it. I thought about this for a while when fabricating my current setup but couldn't come up with a good way to make it happen. It's pretty tight up there.

Maybe an electric squirl-cage blower mounted behind the engine with air ducted over the head. Similar to how the turbo blower air is ducted in your avitar. Just a thought...

Regardless of the exact setup, if you can get a few hundred CFM flowing over the head and cylinders at idle it will definitely make a difference.