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 colonel mustard
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| posted on November 1st, 2009 at 02:26 PM |
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Gilmer Belt drives on VW type 1
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??
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STIDUB
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| posted on November 1st, 2009 at 05:36 PM |
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spend the limited funds you have on necessities before attempting to go for shiny "cool" things would be my advice
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ian.mezz
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| posted on November 2nd, 2009 at 12:19 PM |
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waste of your money
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bajachris88
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| posted on November 2nd, 2009 at 12:39 PM |
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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?)
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Camo
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| posted on November 2nd, 2009 at 01:17 PM |
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| Quote: | Originally
posted by bajachris88
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?)
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Well this is something I haven't heard of before. I know I dont know a lot about VW, but I couldn't see this happening. Anyone else. Sorry if I'm
wrong.
Kev
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Sides
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| posted on November 2nd, 2009 at 02:06 PM |
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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.
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colonel mustard
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| posted on November 2nd, 2009 at 02:42 PM |
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I think thats why welded fans are avaliable...
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ian.mezz
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| posted on November 2nd, 2009 at 03:11 PM |
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| Quote: | Originally
posted by colonel mustard
I think thats why welded fans are avaliable...
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stop wasting your money on stuff that wont make your car any better. 
ps I have double over headed fox tails if you after some of them
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Joel
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| posted on November 2nd, 2009 at 03:18 PM |
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| Quote: | Originally
posted by Camo
| Quote: | Originally
posted by bajachris88
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?)
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Well this is something I haven't heard of before. I know I dont know a lot about VW, but I couldn't see this happening. Anyone else. Sorry if I'm
wrong.
Kev
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ttakes a good motor to rev to the point that this happens but all it takes is the fan being spot welded to prevent it
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squizy
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| posted on November 2nd, 2009 at 03:44 PM |
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| Quote: | Originally
posted by ian.mezz
ps I have double over headed fox tails if you after some of them
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I'll take one.
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STIDUB
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| posted on November 2nd, 2009 at 03:45 PM |
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i assume the welded fans have the blades welded to the body alot better than factory specs? or is there more to it?
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trickysimon
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| posted on November 2nd, 2009 at 06:20 PM |
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Thats it, just fully welded. Only spot welds from factory.
The look of a serpentine is worth the risk of fan explosion  
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Joel
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| posted on November 2nd, 2009 at 07:05 PM |
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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
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hellbugged
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| posted on November 2nd, 2009 at 07:11 PM |
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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
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trickysimon
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| posted on November 2nd, 2009 at 07:15 PM |
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How would it jam it open when you got the throttle tube going through the shroud?
Unless it slices through that...
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Joel
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| posted on November 2nd, 2009 at 07:18 PM |
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you dont wanna see the carnage a fan makes when it explodes
would make u launch that pretty serp over the back fence
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hellbugged
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| posted on November 2nd, 2009 at 07:19 PM |
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correctamundo
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trickysimon
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| posted on November 2nd, 2009 at 07:23 PM |
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Yeh, I've heard of smashed cylinder fins and all sorts of carnage that they can cause 
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colonel mustard
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| posted on November 2nd, 2009 at 07:25 PM |
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well... im sold on keeping my squealer
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dangerous
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| posted on November 2nd, 2009 at 07:25 PM |
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...or get the correct sized lower pulley to keep the fan rpms under control.
| Quote: | Originally
posted by westi
That's mad Alan.
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trickysimon
A.k.a.: Simon Azzopardi
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| posted on November 2nd, 2009 at 07:27 PM |
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But then your fan isnt spinning fast enough the rest of the time?
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Joel
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| posted on November 2nd, 2009 at 07:29 PM |
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get a revlimitor rotor or just have the fan welded and balanced
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hellbugged
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| posted on November 2nd, 2009 at 07:31 PM |
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or all three 
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trickysimon
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| posted on November 2nd, 2009 at 07:31 PM |
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Or stop being a bunch of pussys
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dangerous
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| posted on November 2nd, 2009 at 07:33 PM |
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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.
| Quote: | Originally
posted by westi
That's mad Alan.
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Joel
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| posted on November 2nd, 2009 at 07:36 PM |
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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
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STIDUB
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| posted on November 2nd, 2009 at 07:40 PM |
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whats a welded fan worth? say as an exchange kinda deal....
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trickysimon
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| posted on November 2nd, 2009 at 07:44 PM |
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http://cgi.ebay.com/ebaymotors/New-factory-VW-welded-and-balanced-doghouse-cooling-fan_W0QQitemZ180426633862QQcmdZViewItemQQimsxZ200
91101?IMSfp=TL0911011410001r37190
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STIDUB
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| posted on November 2nd, 2009 at 09:01 PM |
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woah, who wants a welded fan then! i think i currently have 2 fans & i do that kinda thing daily
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colonel mustard
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| posted on November 2nd, 2009 at 09:07 PM |
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it says balanced too...
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