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displaying posts 1 to 6 of 6
| Author | Subject: exh cam sealed without vac pump? |
 bobdylan_55
Seasoned Pro  Location: derby Registered: 28 Mar 2009 Posts: 1,466 Status: Offline |
Post #1
hi, does anyone know if the exhaust cam is still sealed at the vacuum pump end if the vacuum pump isnt in place? only reason i ask is because i would like to adapt the cam to run a pulley for an alternator, but obviously would be difficult to get a bearing that would seal properly in the hole. cheers ________________________________________ 309 GTi6-T |
 Posted 29th May 2010 at 01:00
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Rich E
Forum Admin Location: Hertfordshire Registered: 27 Apr 2005 Posts: 7,757 Status: Offline |
Post #2
No, the vacuum pump seals the channel.I wouldn't want anything high load to be camshaft driven anyway  You'd be risking the belt jumping on sudden load changes, or possibly even the camshaft snapping. ________________________________________ Rich |
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Posted 29th May 2010 at 01:14
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bobdylan_55
Seasoned Pro Location: derby Registered: 28 Mar 2009 Posts: 1,466 Status: Offline |
Post #3
ive thought that, but dont the mi16 use it as standard for driving the pas? are they not as much of a load?________________________________________ 309 GTi6-T |
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Posted 29th May 2010 at 01:26
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Rich E
Forum Admin Location: Hertfordshire Registered: 27 Apr 2005 Posts: 7,757 Status: Offline |
Post #4
Yeah, it's a much lower load from the PAS pump. I never really understood the logic of driving the PAS from the cam and they've never done the same again since.________________________________________ Rich |
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Posted 29th May 2010 at 01:35
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allanallen
Seasoned Pro Location: Buxton Registered: 01 May 2007 Posts: 1,399 Status: Offline |
Post #5
In all honesty if you wanted to go down this route it'd be a sight easier to fit an mi16 head and adapt your exhaust mani to fit. You'd need to make it seal as the original vac pump does then you'd need to make up a shaft and a some kind of bearing set-up to to extend the cam, this would also need another seal on it. You then need to make up suitable pulleys and an alt mount. Not bloody easy! You've also got to be careful with your pulley ratios or it'll not charge at low revs and theres not much room for decent sized pulleys. As you know I've done similar on mine but if I was to do it again i'd try and avoid it, Its a ball ache buddy! ________________________________________ www.bridgecraftmotorsport.co.uk |
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Posted 29th May 2010 at 01:43
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bobdylan_55
Seasoned Pro Location: derby Registered: 28 Mar 2009 Posts: 1,466 Status: Offline |
Post #6
lol ok guys, ill try and stick it in the standard place (ish) with original pulleys. ta________________________________________ 309 GTi6-T |
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Posted 29th May 2010 at 03:50
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