u/d pulley=3 hp - 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 09-17-2007, 03:51 PM   #1
Senior Member
Posts like a Camaro
Thread Starter
 
Join Date: Oct 2006
Location: montreal canada NEBF07 ONBF07
Posts: 987
Thanks: 0
Thanked 0 Times in 0 Posts
firebuick is on a distinguished road
Default u/d pulley=3 hp

well got my zzp water pump underdrive pulley 10 minuites job for 3 hp at 6000 rpm but it was also a test to see the shipping .place order on the 31 august zzp got my money order on the 7 sept ship the same day got it here in montreal today the 17 not to bad because there 2 weekend involve

firebuick is offline   Reply With Quote
Old 09-17-2007, 03:56 PM   #2
Senior Member
Certified GM nut
 
Join Date: Jul 2004
Location: New York City
Posts: 1,912
Thanks: 0
Thanked 0 Times in 0 Posts
OLDsman105 is on a distinguished road
Default

Cool. I was happy with mine. I like how the engine reved a little easier.
OLDsman105 is offline   Reply With Quote
Old 09-17-2007, 04:01 PM   #3
Senior Member
Certified GM nut
 
Join Date: Dec 2002
Location: plattsburgh NY
Posts: 2,037
Thanks: 0
Thanked 0 Times in 0 Posts
TJ'sblackbonne is on a distinguished road
Default

I like mine
TJ'sblackbonne is offline   Reply With Quote
Old 09-18-2007, 02:18 AM   #4
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

3hp? You mean 3-5 times the normal variation of back-to-back dyno pulls?

I'm not out to bust your bubble, but you can't characterize or prove a 3hp gain. And if you could, it wouldn't make much difference.

(and I run a 10% UD WP pulley myself)

Edit (now that I'm sobered up a bit and have some coffee):

The 3hp number has always been a pet peeve of mine for the above reasons. While it probably saves a bit of power, I think it'* impossible to determine exactly how much. There is a RUMOR that our water pumps cavitate at the high end, and run more efficiently with an UD pulley. I personally think my 10% is too much for a daily driver. Not sure what the ZZP is.

The bad side of this for the S1 L67'* is this will prevent using the 3.5" idler if you have a smaller SC pulley. The idler will hit the WP pulley, and the belt will rub against itself. This is part of the reason I added another idler off the ICM bracket on the Zilla.

But at lower RPM'*, the cooling is less efficient (at least on my car). With the OEM and replacement water pumps. This is part of the reason I run a pretty heavily drilled 160 thermostat now.
willwren is offline   Reply With Quote
Old 09-18-2007, 08:05 AM   #5
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Bill...when you mention the possibility that "our" waterpumps cavitate at the high end. Which our are you speaking, S1 or S2. Reason for my asking is the part number is different. As we all know there were many changes from S1 to S2 for various reasons...one possibly being a cavitation problem.
BillBoost37 is offline   Reply With Quote
Old 09-18-2007, 08:11 AM   #6
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Hard to say that. I don't recall where I read it. Probably ClubGP, which would be the S2 pump.

But we also know even on the S1 pumps, there are two different designs for the impellers. One stamped, one cast:

http://www.bonnevilleclub.com/forum/...ic.php?t=74910

Most of us don't stay at WOT long enough for pump cavitation to have an effect on temps.
willwren is offline   Reply With Quote
Old 09-18-2007, 08:17 AM   #7
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Cool...thanks

Anyone beside me think this might reduce the restriction in our cooling systems?
http://www.bonnevilleclub.com/forum/...ic.php?t=85781

If more cooling is desired, it might be worthy to test flow between this area and the T stat to find the open stat flow rate and the u turn flow rate. (Leaving the cooling ports to Tb open.
BillBoost37 is offline   Reply With Quote
Old 09-18-2007, 11:24 AM   #8
Senior Member
True Car Nut
 
Join Date: Jul 2003
Location: Westerville, Ohio 2000 Black SSEi
Posts: 6,127
Thanks: 0
Thanked 0 Times in 0 Posts
Rogue is on a distinguished road
Default

EWP FTW
Rogue is offline   Reply With Quote
Old 09-18-2007, 11:49 AM   #9
Senior Member
Certified GM nut
 
Join Date: Jul 2004
Location: New York City
Posts: 1,912
Thanks: 0
Thanked 0 Times in 0 Posts
OLDsman105 is on a distinguished road
Default

If I could run one on the riviera I would.
OLDsman105 is offline   Reply With Quote
Old 09-18-2007, 05:03 PM   #10
Senior Member
Posts like a Camaro
Thread Starter
 
Join Date: Oct 2006
Location: montreal canada NEBF07 ONBF07
Posts: 987
Thanks: 0
Thanked 0 Times in 0 Posts
firebuick is on a distinguished road
Default

im running a block upper on my stock UIM for a test at the same time to see is there a difference in power between the stock and the dorman and so far my cooling temp is the same .mine is block whit jbweld
firebuick is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Need supercharger pulley route layout and pulley part number Allmachtige 1992-1999 1 10-05-2006 09:31 PM
Pulley lube for a squeaky pulley? VigCS General GM Chat 5 06-02-2006 10:39 PM
SER2 Pulley swap vs. SER1 Pulley swap BonEvilSSEi General GM Chat 2 10-06-2004 08:25 PM
Pulley Boys 2.2" SC pulley Tjnapster General GM Chat 3 09-30-2004 12:38 PM
Taylor D's Pulley Install....I HATE PULLEY SWAPS!!! dbtk2 Performance, Brainstorming & Tuning 13 08-27-2003 12:30 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 05:15 PM.


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.