Hello everyone, I'm new here and was wondering if anyone knew if I can use a L20 crank pulley on a Z24 crank?

you sure can but its not worth it they don't have a harmonic balancer on em... try and get one of any 6 cyl L motor. the balancer will improve top rpm

http://www.partstrain.com/ShopByDepartm ... c_Balancer

I found these...
http://www.atiperformanceproducts.com/p ... nissan.htm

I will only be running an alt, and water pump. I am also looking for the lightest dampener possible. Which do you recomend? There is a 4 cyl and 6cyl so?...

OEM are 'tuned' to a specific rpm, so you probably need the aftermarket BMW style which is a non-tuned design. NEC in Melb used to make them, and someone in NZ makes them as well. L series hub with BMW damper assembly. See one here at DatRats : link

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Michael
'71 240Z, RB20DET.
'89 Nomad (needs speed).

Have a talk to 'Z Shop' about the BMW dampener.
http://www.zshop.net.au/

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What was that?

Thanks for the info guys, I kind of figured that I needed something more than stock. I asked about the ATI dampeners because they say that they are good for up to 500-1000hp well above stock. I live in Las Vegas and not familiar with the shops in Australia. I have been reading up on Z24 info on a few Australian datsun sites, and you guys know your stuff. Thanks again, and please post any other info you have.