No Slip Fan Belt -- YIKES --- Don\'t do this ??

68AutoBug · 2 Jun 2006, 1:08 pm

This fellow may have had a slipping fan belt....

but No Longer....:o:o

Very heavy chain and not even oiled......

Bad Move....

Lee

ColumBUS · 2 Jun 2006, 1:24 pm

oooh ouch!
why???

68AutoBug · 2 Jun 2006, 1:29 pm

It probably works OK....

but I don't like it......

Timing chains used to be used in many engines...
Now replaced by belts....
but the chains were running in oil.....

Sizes of [pulleys] sprockets are different too....

Lee

Andy · 2 Jun 2006, 1:42 pm

looks like an unusualy mod for sure, I'd hate to think of the bearing load from that chain once it wears a little. Maybe he's driving more than the alt. and fan from that shaft?
How do you adjust it?

68AutoBug · 2 Jun 2006, 1:48 pm

It looks like the alternator base is home made....

where does He put the oil in???

it looks like a type 1 engine....

Lee

empi · 2 Jun 2006, 1:50 pm

Small bottom pully.... :duh

Could be a tuff mod for a tuff Ratt

VWCOOL · 2 Jun 2006, 9:37 pm

Nice tinware!

type3lover · 2 Jun 2006, 10:40 pm

a reliable mod? "Tell him he's dreaming!"

Matt Ryan · 3 Jun 2006, 7:37 pm

I wouldn't like to be near it when it eventually (& inevitably) decides it's had enough and takes a flying lesson!!!!

Matt.

bajachris88 · 3 Jun 2006, 8:08 pm

WAIIITTT.

I read somewhere in some mechanical engineer's thesis about playing with vw and fans and cooling and belt slippage, that the fan only has a certain Max threshold area of 'spin-age' handling before it starts busting apart. Tis y u want to preserve fan belt slippage to some degree.

I would imagine this mod will have a different fan, modified fan otherwise it will die pretty quickly from what i read. Surely would creat some interesting pressure. a fan spinning around 1000 to 3000 revs. or greater :o

Clean out the heater channels Haha.

71superbug · 4 Jun 2006, 4:51 pm

the new ba xr8's come with timing chains...although they are greased as mentioned above.

Anthony

68AutoBug · 4 Jun 2006, 5:08 pm

bajachris88 wrote:I read somewhere in some mechanical engineer's thesis about playing with vw and fans and cooling and belt slippage, that the fan only has a certain Max threshold area of 'spin-age' handling before it starts busting apart. Tis you want to preserve fan belt slippage to some degree.

You can usually tell when a fan belt is going to break, as they 'normally' crack etc a long time before they break...

I see a lot of High Performance motors in the US run an idler pulley on the belt to prevent slippage and have the 'normal' VW fan welded to prevent it falling apart at high revs....

Lee

bajachris88 · 4 Jun 2006, 5:13 pm

just don't go putting your finger in there

😂

Andy · 8 Jun 2006, 3:00 pm

Oh dear, poor Wes would have a heart attached reading a quote like this!
Note the gearing, 1:1, it already spins much slow than stock, belt slip is to do with power being drawn by the fan being higher than what he belt can transmit, I don't think it's "designed that way" as there are way to many variables in service to determine exactly when it will slip.

bajachris88 wrote:WAIIITTT.

I read somewhere in some mechanical engineer's thesis about playing with vw and fans and cooling and belt slippage, that the fan only has a certain Max threshold area of 'spin-age' handling before it starts busting apart. Tis y u want to preserve fan belt slippage to some degree.

I would imagine this mod will have a different fan, modified fan otherwise it will die pretty quickly from what i read. Surely would creat some interesting pressure. a fan spinning around 1000 to 3000 revs. or greater :o

Clean out the heater channels Haha.