Streetfighterpete
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| posted on 1/11/14 at 05:07 PM |
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Zetec alternator drive pulleys
Hi guys,
I'm building a Luego Velocity XT with a 2.0 Zetec fitted. In a bid to reduce crank mass I'm ruining a 1.8 flywheel and have also recently
bought an alloy crank pulley. However, this is a smaller diameter than the standard metal pulley, so my question is this: this will mean that the
water pump and alternator run slower. Will this adversely effect the alternator performance and the engine cooling, or do I now have to run larger
alternator and/or water pump pulleys? Also, I have heard scare stories about the original crank pulley being fitted with a rubber bush which the
alloy one does not have and that this can lead to oil pump failure etc. Anyone had any experience of this? Any advice much appreciated.
Cheers
Pete
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big_wasa
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| posted on 1/11/14 at 05:29 PM |
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Yes pump and alternator will run a touch slower but you will be revving it harder and for longer than stock. Only downside is you may need to blip the
throttle to start it charging. Plus side the alternator bearings may last longer
The nose flex with a single mass pulley has been found to be a terminal problem with big power zetecs but I've not heard of many issues in lower
power set ups.
So if you have a lot of money into a 500bhp 2.1 turbo setup, don't do it. If you have a £200 lump with no turbo or head work 165bhp is the most
you will see any way and crack on. 
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Streetfighterpete
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| posted on 1/11/14 at 05:51 PM |
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Cheers Wasa - yeah basically a standard 2.0 lump with cams, bike carbs and mega jolt ignition, so should be OK then - just need a longer belt.
Cheers
Pete
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Streetfighterpete
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| posted on 1/11/14 at 05:52 PM |
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Doh! That should have said shorter belt!
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big_wasa
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| posted on 1/11/14 at 06:01 PM |
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Shouldn't hurt it but it will only be bling
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