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Title: Welded fans... Check this. Post by: Fastbrit on August 11, 2008, 20:22:49 pm http://www.cal-look.com/forum/index.php?topic=27324 (http://www.cal-look.com/forum/index.php?topic=27324)
Hmm, interesting discussion. Title: Re: Welded fans... Check this. Post by: John Rayburn on August 11, 2008, 20:40:17 pm I had Jeff Denham weld up a good German fan for me almost 20 years ago. I set my belt up to slip just to be safe so I don't have to post scary pictures...Knock on wood.
Title: Re: Welded fans... Check this. Post by: louisb on August 11, 2008, 20:44:31 pm Wow, that will make you think won't it.
--louis Title: Re: Welded fans... Check this. Post by: Sam K on August 12, 2008, 00:35:33 am I watched a friend ruin a really nice Thing fanshroud a few years ago when his fan exploded doing a line loc burnout. I bought a welded one from Gene Berg the next day.
Title: Re: Welded fans... Check this. Post by: benssp on August 12, 2008, 08:19:42 am I had a stock fan let go many years ago, took out the fan housing and stand. they say you learn from your mistakes so when I fitted the Thing shroud I fitted a BugPack welded fan. Had no issues with it and regularly saw 7.5k RPM, problem I had was the belt flying off on a regular basis, rectified this by fitting a power pulley. It's only a 1776 but i've got a large cooler with fan and a deep sump and cruises at 80mph without going over 180 degrees ;D
Title: Re: Welded fans... Check this. Post by: Sarge on August 12, 2008, 13:07:29 pm Of all the engines I've had over the years, none had a welded fan. I've beat the snot out of those motors, too. The thing most folks overlook is using the correct amount of shims for setting up the alternator pulley...you've got to have ten shims total (whether they're between or outside the pulley halves). Taking a few shims out of the mix and tossing them into your tool box will lead to problems as the alternator nut will tighten onto the shaft (it's only threaded so far) rather then tightening against the cup and stack of shims which hold the pulley halves together. So, if the pulley is "loose" so to speak on one end of the alternator shaft, could the vibrations work to loosen or destroy the fan on the other end? My $.02
Title: Re: Welded fans... Check this. Post by: Ivan on August 13, 2008, 12:07:25 pm I had a stock fan let go at speed on the quarter mile, and it made a real mess - similar result to the pics on that thread except thankfully virtually no damage to the engine itself. Although part of the fan did try to escape through the rear quarter panel and so some bodywork and paint was needed.
I've got a Berg welded fan now, and have had no problems since - touch wood. Title: Re: Welded fans... Check this. Post by: Rennsurfer on August 13, 2008, 20:36:02 pm Of all the engines I've had over the years, none had a welded fan. I've beat the snot out of those motors, too. The thing most folks overlook is using the correct amount of shims for setting up the alternator pulley...you've got to have ten shims total (whether they're between or outside the pulley halves). Taking a few shims out of the mix and tossing them into your tool box will lead to problems as the alternator nut will tighten onto the shaft (it's only threaded so far) rather then tightening against the cup and stack of shims which hold the pulley halves together. So, if the pulley is "loose" so to speak on one end of the alternator shaft, could the vibrations work to loosen or destroy the fan on the other end? My $.02 Amen, brother! I've always been a firm believer in leaving what VW intended on the pulley. In this case, shims. They're all on there for a good reason. Glad that I'm not the only one that feels this way. Good on ya, Sarge! Title: Re: Welded fans... Check this. Post by: John Rayburn on August 14, 2008, 05:26:42 am I guess you didn't see me remove those two shims from your pulley a few weeks back?
Title: Re: Welded fans... Check this. Post by: Rennsurfer on August 14, 2008, 07:19:30 am I guess you didn't see me remove those two shims from your pulley a few weeks back? Dude... you know what? You are more evil than a sweater wearing... nevermind. HAHA!! Just kidding. ;D Title: Re: Welded fans... Check this. Post by: jamiep_jamiep on August 14, 2008, 15:00:42 pm I was reading a (very) old Hot VW's a couple of days ago, where it discussed some people putting a thin smear of some kind of silicone lubricant onto the pulleys to make the belt slip at higher rpms. DOn't think I'd like to try it though, but was apparently fairly common practice...
Title: Re: Welded fans... Check this. Post by: benssp on August 14, 2008, 15:21:20 pm wasn't someone developing a 'clutched' top pulley in the states? saw that in a Hot VW's too ;D
Title: Re: Welded fans... Check this. Post by: Donny B. on August 14, 2008, 16:13:04 pm There have been a number of applications of an Air Conditioner clutch used on the bottom pulley. Mike Fischer of Competition Engineering was doing them years ago.
Title: Re: Welded fans... Check this. Post by: redbluebug on August 15, 2008, 00:46:43 am Aircooled.net has a setup for the top pulley, but it is for a serpertine belt only.
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