Underdrive pulley has proven results - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Reply
 
 
 
Thread Tools Search this Thread
Old 09-13-2004, 06:43 PM   #1
Senior Member
True Car Nut
Thread Starter
 
Join Date: Oct 2002
Location: Genoa, Illinois
Posts: 4,013
Thanks: 0
Thanked 0 Times in 0 Posts
Allmachtige is on a distinguished road
Default Underdrive pulley has proven results

Quote from Zoomer, "...our best guess is that the car'* temps run 2 deg hotter than normal. We've dyno tested and found it gives 3WHP at 5800rpm."

This relates to the ZZP underdrive waterpump pulley. Somewhere there is word that the stock size waterpump pulley caused cavitation, hence the UD pulley "should" allow the engine to run cooler. Anyone have a source on this if it exists?

Either way, if the car is running 2 deg hotter, I'm glad I drilled my 180-stat.

Hope you all find this info helpful.
Allmachtige is offline   Reply With Quote
Old 09-13-2004, 08:44 PM   #2
Sol
Senior Member
True Car Nut
 
Join Date: Sep 2002
Posts: 8,909
Thanks: 0
Thanked 0 Times in 0 Posts
Sol is on a distinguished road
Default

Would the underdrive pulley cause the water pump to spin faster or slower?
Sol is offline   Reply With Quote
Old 09-13-2004, 08:47 PM   #3
Senior Member
True Car Nut
 
Join Date: Feb 2003
Location: Bloomington-Normal, IL 1997 SE
Posts: 3,734
Thanks: 0
Thanked 0 Times in 0 Posts
macho_mike21 is on a distinguished road
Default

i dont think it makes much of a difference. Our cooling systems are capable of keeping our cars pretty cool. If you dont believe me take out your tstat and see how much it warms up.


How do they test if the pump was cavitating?
macho_mike21 is offline   Reply With Quote
Old 09-13-2004, 08:57 PM   #4
Senior Member
True Car Nut
 
Join Date: Dec 2003
Location: Corn Fields, IN
Posts: 2,766
Thanks: 0
Thanked 0 Times in 0 Posts
John Deere Boy is on a distinguished road
Default

Quote:
Originally Posted by macho_mike21
i dont think it makes much of a difference. Our cooling systems are capable of keeping our cars pretty cool. If you dont believe me take out your tstat and see how much it warms up.

huh? if you take the tstat out, it will run cooler.

Quote:
Originally Posted by Sol
Would the underdrive pulley cause the water pump to spin faster or slower?
slower.

If cavitation was much of a problem, shouldn't we hear about more wp failures?
John Deere Boy is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
ZZP underdrive alternator pulley JuniorCar Performance, Brainstorming & Tuning 16 06-07-2010 10:34 AM
water pump underdrive pulley its840 Performance, Brainstorming & Tuning 9 09-06-2006 07:04 PM
Underdrive Pulley: Which one should I choose? Allmachtige Performance, Brainstorming & Tuning 32 06-26-2006 11:27 PM
Stupid underdrive pulley question Jack Performance, Brainstorming & Tuning 1 10-07-2005 09:50 PM
Will a ZZP water pump underdrive pulley work for series 1??? jgs11 Performance, Brainstorming & Tuning 22 10-04-2004 01:15 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 04:42 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.