Subject	any details on how well this pulley performs at high rpms ?
Posted by	lymon on November 21, 2006 at 6:22 AM
	This message has been viewed 135 times.
In Reply To	Underdrive pulley users -> PEX Overdrive Waterpump Pulley GB posted by YugoBernie (NoVA) on November 20, 2006 at 01:50 PM
Message	A common problem with overdrive coolant pump pulleys is that it can lead to cavitation (formation and collapse of low-pressure bubbles) and loss of coolant-pumping efficiency, resulting in severe cooling problems and overheating at high rpms. Because of this reason overdrive pulleys are often not recommended for track cars. -Eric The Dutch Z32 enthusiasts site 350Z Silverstone 91TT 2+0 silver 90TNT 2+2 (Twinturboed NA) Skyline blue 92TT 2+2
Follow Ups	Underdrive pulley users -> PEX Overdrive Waterpump Pulley GB - YugoBernie (NoVA) 13:50:53 11/20/06 I love mine!!!!!! - Guapo 13:59:55 11/20/06 Did you already install it ?? (n/m) - ArubaDave 22:48:23 11/20/06 Do these H2O pulleys need to be painted? If so, what do - 240Z FeO2 14:04:48 11/20/06 Spray, black, high temp wouldn't hurt. (n/m) - YugoBernie (NoVA) 14:09:50 11/20/06 how about clear? (n/m) - NobleZ 17:27:37 11/20/06 Whatever makes you happy - personally I'm not painting - YugoBernie (NoVA) 18:17:07 11/20/06 Probably helps reinstalling of new belts too. (n/m) - BigTDogg (MA) 14:07:07 11/20/06 does it just negate the effect of an Unorthodox UD pulley - ZEngineer 14:09:13 11/20/06 Returns the h20 pump to stock rotatation per motor rpms. (n/m) - YugoBernie (NoVA) 14:11:20 11/20/06 It will negate some of the gains from the UD pulley - kuah@splparts.com 14:16:04 11/20/06 understood, it allows you to pick which accessories to UD :) - ZEngineer 14:23:52 11/20/06 Re: understood, it allows you to pick which accessories to UD :) - kuah@splparts.com 14:39:45 11/20/06 What about the "risks" of losing the harmonic balancing? - pallen 15:37:13 11/20/06 Re: What about the "risks" of losing the harmonic balancing? - kuah@splparts.com 16:22:50 11/20/06 Why not get the ATI (AMZ) crank pulley? - Kong ZTT GT28RS MD 19:58:18 11/20/06 because it's always 2 weeks away from being available (n/m) - The Devils Z 21:27:19 11/20/06 lol (n/m) - Kong ZTT GT28RS MD 01:13:03 11/21/06 I think that would be a good option - pallen 08:48:55 11/21/06 if it helps my track overheating problem, I'll take it :) (n/m) - Guapo 14:53:18 11/20/06 How is this a "group buy"? - BradZ (FL) 14:10:28 11/20/06 Details... - YugoBernie (NoVA) 14:56:52 11/20/06 Thank you. (n/m) - BradZ (FL) 15:16:03 11/20/06 How does this new OD waterpump pulley compare in - AbsolutZ (OH) 15:12:17 11/20/06 TT=120mm, NA=130mm, what's the diameter of the OD pulley? (n/m) - ZEngineer 15:14:02 11/20/06 You're worse off actually. - YugoBernie (NoVA) 15:20:52 11/20/06 So if I'm reading correctly... - AbsolutZ (OH) 15:29:57 11/20/06 Yes and not just @ idle but through out the cars operating - YugoBernie (NoVA) 15:40:10 11/20/06 Thanks, I see what you mean now. (n/m) - AbsolutZ (OH) 15:53:55 11/20/06 $$ Sent (n/m) - Barry'z (NJ) 15:31:18 11/20/06 Thanks. (n/m) - YugoBernie (NoVA) 18:25:47 11/20/06 thats pretty cool , powdercoat it or chrome it >>> - Shawn Lane(NO VA) 16:06:34 11/20/06 I'll leave that up to people to match on their own. - YugoBernie (NoVA) 18:27:36 11/20/06 Because of the dimension and stress involved with these - ArubaDave 22:43:55 11/20/06 Looks like a great product - TTFairladyZ 17:16:21 11/20/06 I think the pricing is fair given my wholesale & import cost - YugoBernie (NoVA) 18:08:32 11/20/06 Dont get me wrong, I think the price is reasonable for some - TTFairladyZ 18:41:13 11/20/06 And my point is... - YugoBernie (NoVA) 21:18:44 11/20/06 Thank you - TTFairladyZ 21:56:07 11/20/06 Sounds great. Thanks Bernie (n/m) - dregos 19:57:46 11/20/06 lol it never ends - CarbonZTT 21:30:52 11/20/06 You know where to find me. (n/m) - YugoBernie (NoVA) 21:45:13 11/20/06 Ordered! Thanks man. (n/m) - SeedyROM 03:54:38 11/21/06 Interesting... (n/m) - Fuzznutz 05:17:59 11/21/06 any details on how well this pulley performs at high rpms ? - lymon 06:22:52 11/21/06 Should be a non-issue given that the pulley restores the - YugoBernie (NoVA) 08:17:21 11/21/06 agreed, and why this isn't recommended for use with - Guapo 08:33:50 11/21/06 just curious... - bobZtwin (NC) 09:47:37 11/21/06 There should be enough range in your bracket but depends - YugoBernie (NoVA) 10:22:36 11/21/06
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