fan belt sizes

[millerje78]

Hey people,

i was just wondering about fan belt sizes because I have two out in the garage, neither of which fit my engine (seemingly too small).

My question is, how many different size belts did aircooled vws use and what were the different applications for each size? anybody know?

thanks folks. I just want to buy the right one
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always seeking a better way
my 73 standard project

do your research, consult with experts, and buy quality parts. you won't be sorry

[Glenn]

905 mm was for generators and 912mm was for alternators. (if I remember correctly).

My engine with alternator uses a 905mm belt... don't ask me why, it just fits.
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
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[millerje78]

[millerje78]

indeed Glenn, the belts I have that don't fit are 905 mm. Its hard to believe that 7 millimeters could make that much of a difference. I reckon it does or Volkswagen wouldn't have changed it. Thanks again, Glenn.
_________________
always seeking a better way
my 73 standard project

do your research, consult with experts, and buy quality parts. you won't be sorry

[Scavenger]

This belt size thing has been a subject of thought for me lately. The 9.5x905 for generators vs 11.3x912 for alternators. I have done a few gen. to alt. conversions and like Glenn found the 9.5x905 fit best with the 11.3x912 being too tight. To my knowledge there were no dimensional changes as far as pulley size or distance between axas. I can not seem to find any supporting evidence but have to believe that alternators used 10 adjusting shims as opposed to 8 for generators. (I would appreciate if someone could confirm this.) Seeing shim kits sold with 10 shims led me to this belief.

Another note on this subject is, I found that [email protected] recommends the 11.3x912 belt for doghouse fan OR alternator applications. He states that the wider belt slips less with the additional load and that it also spins the fan slightly faster for better cooling. I'm not sure if the additional fan speed is from the wider belt riding higher in the pulleys or the extra belt length or a combination of the two.

For some reason I prefer the v-belt design of the gen. belt over the grooved or is it called ribbed design of the alt. belt. I do however believe that John's recommendation deserves some consideration. At some point I plan to check on size availibility of the v-belt design.

[Mooosman]

[neil68]

905 x 9.5 and 905 x 10 both sold by Continental.

FYI: "Bruck-Made In Germany" is the name of a Chinese company, creative name

http://www.made-in-china.com/showroom/hh-autoparts...Parts.html
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Neil.

Der Kleiner Rennwagens
68 Beetle 2332 cc, 204 WHP
12.5 seconds @ 107 mph
Dynojet Test: https://www.youtube.com/watch?v=M9B_H3eklAo

[Glenn]

[thefladge]

I could be wrong, but I seem to remember a slightly smaller belt being used in the 6 volt engines. I think it was a 900 x 9.5.

I remember when I worked at a VW parts shop back in the '90's, we used to stock that belt.

Maybe you have one of those belts.

Perhaps you have a belt for a power pulley. That would be too small for a stock set up.
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1957 Vintage Baja Bug.
2110cc engine, 40 IDF Webers on Gene Berg manifolds, Engle 110 cam, Bugpack 40×35.5 Street Pro Heads, W8CC plugs, 12.5 pound Flywheel, Kennedy 1700 pound pressure plate.

[Scavenger]

Looks like the Continental/Contitech is now made in India.

[lupin..the..3rd]

[hsosa1]