cog pulley

[r1cpowdercoating]

does anybody use the cog pulley on there engine? I was thinking about putting one on my race engine.

thanks
Ron

[FJCamper]

Hi Ron,

The fan belt slips at about 6000rpm and up (I forget the actual starting point) as the air resistance to the fan is that much.

A cog belt will continue to drive the fan past 6k, but it will eat considerable power to do so.

If your problem is throwing belts, that's another story.

FJC

[Marc]

You've asked this before. What other info are you looking for?
http://www.shoptalkforums.com/viewtopic ... 5&t=139689

[Ol'fogasaurus]

To over simplify, cog belts have a lot of weight/mass to them so as they spin faster they want to arc out where they should be straight from one pulley to another; this means you get less contact where they are supposed to go around the pulleys. There is a lot of other dialog that could be added but I tried to keep it simple. They are good for some things, not for others.

Lee

[r1cpowdercoating]

sorry Im getting old forgot I ask about that. please excuse my geritol moment.

ron

[Ol'fogasaurus]

Not a problem. Remember, from experience: Geritol can be habit forming!

[vwo60]

I still run a vee belt on all my engines, 2276, 2054, 17776, as stated the belt needs to slip, i cannot see the need for all the other types of belt systems that are being marketed as a improvement at the moment, just something else to go wrong.

[r1cpowdercoating]

I think I have talked myself out of the cogged belts and serpentine belts. I am going to stay with the v-belt. However, I am going to a power pulley. gonna get me a few extra belts to put in the spare parts racing box.