[Z06] is the pully worth it?
Melting Slicks
Joined: Nov 2002
Posts: 3,398
Likes: 2
From: Allentown PA
There are quite a few hours in labor for a pulley install all by itself. The rack has to come out. Definitely not worth it. When you get a cam, the pulley must be removed anyway, so labor is non existant, then it's worth it..
Melting Slicks
Joined: Oct 2000
Posts: 2,491
Likes: 1
From: prescott AZ
I heard slowing down the accessories can cause over heating (with water pump) and not recharging battery properly plus if it was such a good idea don't you think the GM engineers who were looking for every way to gain extra hp would have thought of that especially as it would cost the factory the same amount of money?
Melting Slicks
Joined: Jun 2004
Posts: 2,836
Likes: 110
From: El Paso TX.
i have had one on my 04 for over a year without any problems. this is with a big system and texas heat. i wouldn't do it unless i was doing a cam install only because its a pain in the ***.
Burning Brakes
Joined: Sep 2004
Posts: 922
Likes: 0
From: Dallas TX
Originally Posted by skeet
I heard slowing down the accessories can cause over heating (with water pump) and not recharging battery properly plus if it was such a good idea don't you think the GM engineers who were looking for every way to gain extra hp would have thought of that especially as it would cost the factory the same amount of money?
. In that case then why didnt they just make the cam with higher lift and more duration? By your resoning there is no need to EVER do a H/C package. I would do it if i were doing a cam install since there is alot of work and when doing the cam install the pulley has to come off anyway.
Racer
Joined: Sep 2005
Posts: 392
Likes: 0
From: Springfield Virginia
Originally Posted by skeet
I heard slowing down the accessories can cause over heating (with water pump) and not recharging battery properly plus if it was such a good idea don't you think the GM engineers who were looking for every way to gain extra hp would have thought of that especially as it would cost the factory the same amount of money?
I would love to to know about the source where you received this most enlightened information.
Burning Brakes
Joined: Sep 2004
Posts: 922
Likes: 0
From: Dallas TX
Originally Posted by Z06 KOS
where did you hear this from and do you have any examples of where this actually happened? I was thinking of buying an ASP pulley in the near future....
I would love to to know about the source where you received this most enlightened information.
I would love to to know about the source where you received this most enlightened information.
I do suggest only getting the crank pulley and not all the other ones.
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Safety Car
Joined: Oct 2003
Posts: 3,838
Likes: 85
From: DFW Texas
I have a u/d pulley in my Z. According to LG my Z with the bolts on it had, plus pulley, did about 10 rwhp more then most Z that came in for the same mods minus the pulley.
So yes, it's worth it if you ask me. It's cheap too.
So yes, it's worth it if you ask me. It's cheap too.
Racer
Joined: Sep 2005
Posts: 328
Likes: 1
From: Atlanta Georgia
Originally Posted by skeet
I heard slowing down the accessories can cause over heating (with water pump) and not recharging battery properly plus if it was such a good idea don't you think the GM engineers who were looking for every way to gain extra hp would have thought of that especially as it would cost the factory the same amount of money?
Are you Kidding me? That is why we have the aftermarket, to take Good ideas or the lack there of and make them Great. THe Manufactures learn from the people that buy thier products and the things that they do to them to make them faster look better etc...
Burning Brakes
Joined: Jun 2004
Posts: 1,240
Likes: 2
From: Cedar Rapids Iowa
Originally Posted by F1_SS
You have too much faith in GM . In that case then why didnt they just make the cam with higher lift and more duration? By your resoning there is no need to EVER do a H/C package.
. In that case then why didnt they just make the cam with higher lift and more duration? By your resoning there is no need to EVER do a H/C package. 
Race Director
Joined: Aug 2004
Posts: 14,639
Likes: 39
From: Winston-Salem North Carolina
St. Jude Donor '08-'09
Originally Posted by slwhite
Because it reduces the reliability of the engine, causes rougher idling, causes a narrower powerband, decreases gas mileage, and possibly increases emissions. Other than that, there is no reason not to do a H/C job. Every design decision is a compromize.
, and I am not engine builder, or a professional racer, although I do race the car. But I am leaning more and more to not modding my car anymore. I returned home from the Spring Mountain Driving school last week, and after riding with an instructor in a totally stock car, it was very aparent that these cars are rarely driven to the limits by the average street racer/3x a year roadracer such as myself. If you're a 1/4 mile guy, mod away. but for track/road course, we should learn how to drive this car better. The school's Z06's are stock down to the air filter and tires. JMHO, don't take it defensively
Melting Slicks
Joined: Sep 2003
Posts: 2,911
Likes: 1
From: Augusta GA
St. Jude Donor '05-'06
Originally Posted by CYA-Vett
There are quite a few hours in labor for a pulley install all by itself. The rack has to come out. Definitely not worth it. When you get a cam, the pulley must be removed anyway, so labor is non existant, then it's worth it..
When you do your first cam (yea we never go big enough first time and when you go internal, well you have the mod bug bad
) might as well do it. IMO no one has back to back dyno or track times for a UD pulley, but it is cheap, and one of those typical bolt ons we do. Go for it when you do your cam Dave
Melting Slicks
Joined: Oct 2000
Posts: 2,491
Likes: 1
From: prescott AZ
F1 SS- I think you have too much faith in the aftermarket companies. And the reason GM did not use higher lift and more duration is for reliability reasons.I understand that our engine has the highest lift GM ever used in a small block.
Z06 KOS - When I owned my C4's there was a book written about myths pertaining to upgrading your C4 like the 160 degree thermostats, air foils,ram air induction, and among other things the pulley "up grade". I forget the name of the book only that it was "101...." something or other. While it was written for the C4 I know this pulley comment applies for the C5 too.
I think the issue here is that some members have performance as a priority and others value reliability first. GM tried for reliability first for obvious reasons. My Z06 has enough performance relative to its reliability for me. If and when I want more, and am willing to settle a little on looks, then I will get a Z07
Z06 KOS - When I owned my C4's there was a book written about myths pertaining to upgrading your C4 like the 160 degree thermostats, air foils,ram air induction, and among other things the pulley "up grade". I forget the name of the book only that it was "101...." something or other. While it was written for the C4 I know this pulley comment applies for the C5 too.
I think the issue here is that some members have performance as a priority and others value reliability first. GM tried for reliability first for obvious reasons. My Z06 has enough performance relative to its reliability for me. If and when I want more, and am willing to settle a little on looks, then I will get a Z07