Hey all!

I was wondering if anyone has done this before? I think i have seen it on that white & blue Volksrod (in a past issue of VWMA)
ANy ideas if they are made or are a custom jobbie.. tensioner would be needed on a 2 pulley setup yes? Waste of time and just go for the serpentine system??

spend the limited funds you have on necessities before attempting to go for shiny "cool" things would be my advice

waste of your money

how would that go when the fan rpm cuts off at a certain rev range while the rest of the motor goes up (isn't it like 4000rpm when the belt starts slipping so the fan don't blow itself up?)

Bajawes is pretty much the expert on fans - he did his engineering thesis or something on the VW cooling fan, and he proved the old "the VW fan cavitates at X rpm" myth was actually due to belt slip.

But yeah - it'd be a risk just like it is with the serpentine systems - standard fan's just aren't designed to do crazy revs.

Never happened to me, but at Warwick on the Saturday someone had their fan go bang and yeah - made a bit of a mess.

I think thats why welded fans are avaliable...

Quote:

Originally posted by ian.mezz ps I have double over headed fox tails if you after some of them

i assume the welded fans have the blades welded to the body alot better than factory specs? or is there more to it?

Thats it, just fully welded. Only spot welds from factory.
The look of a serpentine is worth the risk of fan explosion

stock fans arent welded at all
the blades are just held in place by the tabs being peened over

welded fans just have all these tabs spot welded in place

it's the acceleration of the fan that makes them explode, not necessarily high rpm..........certainly not fun when the shrapnel jams the throttle wide open

How would it jam it open when you got the throttle tube going through the shroud?
Unless it slices through that...

you dont wanna see the carnage a fan makes when it explodes

would make u launch that pretty serp over the back fence

correctamundo

Yeh, I've heard of smashed cylinder fins and all sorts of carnage that they can cause

well... im sold on keeping my squealer

...or get the correct sized lower pulley to keep the fan rpms under control.

But then your fan isnt spinning fast enough the rest of the time?

get a revlimitor rotor or just have the fan welded and balanced

or all three

Or stop being a bunch of pussys

I should clarify that, yes Simon,
there needs to be a pulley made to get the maximum rpm correct,
and fit a rev limiter as well.

The smaller "power pulleys" may be too small for full time "normal" use,
but I think the ratio of most serpentine systems over-drives the fan faster than stock.

yea the gen pulleys are noticably smaller
i know just putting a 10mm smaller pulley on my blower upped the boost by 2psi so i can only imagine its spining the fan alot faster

whats a welded fan worth? say as an exchange kinda deal....

http://cgi.ebay.com/ebaymotors/New-factory-VW-welded-and-balanced-doghouse-cooling-fan_W0QQitemZ180426633862QQcmdZViewItemQQimsxZ200 91101?IMSfp=TL0911011410001r37190

woah, who wants a welded fan then! i think i currently have 2 fans & i do that kinda thing daily

it says balanced too...