ZZ502 cam specs ??? - Speedwake 2.0
 
Thread Tools
post #1 of 12 (permalink) Old 09-16-2003, 09:52 PM Thread Starter
Super Moderator
 
DonMan's Avatar
 
Join Date: Mar 17,2002
Location: Lake Texoma
Posts: 12,363
Question ZZ502 cam specs ???

Does anyone know the specs for the 502/502 GM crate engine camshaft, aka: ZZ502 ?
I know the lift / dur numbers........was looking for valve overlap, I valve open/close, E valve open/close, etc......
DonMan is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 12 (permalink) Old 09-16-2003, 10:24 PM
Registered User
 
Join Date: Jul 10,2003
Location: Lake Texoma
Posts: 23
Just happen to have an old Car Craft mag that had the specs. .527"I/.544"E, 224/234dur @.050 on 110 seperation. Made 555 ft. lbs. @ 4500 rpm and 513 hp @ 5250 rpm.
232boss is offline  
Quote Quick Reply Share with Facebook
post #3 of 12 (permalink) Old 09-16-2003, 10:25 PM
Registered User
 
Join Date: Jul 10,2003
Location: Lake Texoma
Posts: 23
No ideas on the opening/closing times though.
232boss is offline  
Quote Quick Reply Share with Facebook
post #4 of 12 (permalink) Old 09-17-2003, 08:50 PM Thread Starter
Super Moderator
 
DonMan's Avatar
 
Join Date: Mar 17,2002
Location: Lake Texoma
Posts: 12,363
GM Performance Parts gives all those specs in their catalog. I need the open/close numbers so I can plug them into my Desktop Dyno.
Hey, but thanks for the effort!
DonMan is offline  
Quote Quick Reply Share with Facebook
post #5 of 12 (permalink) Old 09-17-2003, 09:27 PM
Registered User
 
Join Date: Jul 10,2003
Location: Lake Texoma
Posts: 23
Just to let you know the 496 is no longer there. The guy went ahead and built it and put it in a jet boat this summer-what a waste. Have you had any luck with a engine otherwise though? What head set up are you looking at? I know from experience that the edelbrock performer rpm package is pretty tough to beat. I know they only use a flat tappet cam, but until the gen vi motor that is what all bbc mercs used. I know for a fact the 540hp/540ft lbs they advertise is correct. We built one to their specs and had it dynoed and it was almost dead on at EVERY rpm-still have dyno sheet somewhere. Don't know what your budget is but that's alot of bang for the buck. Don't forget all this is with a pump gas friendly 9.5 compression
232boss is offline  
Quote Quick Reply Share with Facebook
post #6 of 12 (permalink) Old 09-18-2003, 02:32 PM
Registered User
 
Join Date: Dec 23,2002
Location: Missouri
Posts: 818
GrumpyBullet is offline  
Quote Quick Reply Share with Facebook
post #7 of 12 (permalink) Old 09-18-2003, 09:38 PM Thread Starter
Super Moderator
 
DonMan's Avatar
 
Join Date: Mar 17,2002
Location: Lake Texoma
Posts: 12,363
Quote:
Originally posted by GrumpyBullet
This might help you DonMan
http://www.sallee-chevrolet.com/Chev...s/502hbek.html
Thanks GB!
DonMan is offline  
Quote Quick Reply Share with Facebook
post #8 of 12 (permalink) Old 09-18-2003, 09:41 PM Thread Starter
Super Moderator
 
DonMan's Avatar
 
Join Date: Mar 17,2002
Location: Lake Texoma
Posts: 12,363
Quote:
Originally posted by 232boss
Just to let you know the 496 is no longer there. . Have you had any luck with a engine otherwise though? What head set up are you looking at?
Michael,
Thanks for the effort! I haven`t even seen my boat since Labor Day.............
I`m probably going to use the heads I already have: L29 Vortecs. The guy who used to build engines for Eddie Hill is going to do some work on them to promote flow.
DonMan is offline  
Quote Quick Reply Share with Facebook
post #9 of 12 (permalink) Old 05-26-2004, 10:19 PM
Registered User
 
Join Date: May 26,2004
Location: Michigan
Posts: 3
Question cam for zz502

Maybe you can help me with what cam to put in to a ZZ502/502hp with out any major changes. like pistons. I want to go to a solid lifter and better springs so I can run out the rpm more that 5800. I currently run this on injected alky, at 38Degrees of timing. it is not in a boat, its in a rear engine dragster. I was told by a friend that this was the place to come to get answers on the zz502. Any help is greatly appreciated.

Thanks
Bill
bskaggshd is offline  
Quote Quick Reply Share with Facebook
post #10 of 12 (permalink) Old 05-27-2004, 08:29 AM
Registered User
 
Join Date: Feb 2,2004
Location: Tri-Cities, TN
Posts: 1,691
Don,
E-mail me and I will send you program to figure the valve events.

Chris
cstraub is offline  
Quote Quick Reply Share with Facebook
post #11 of 12 (permalink) Old 05-27-2004, 09:03 AM
cfm
Registered User
 
Join Date: Mar 14,2003
Location: US
Posts: 19,039
Donman,

I thought you had Merlin's?
cfm is offline  
Quote Quick Reply Share with Facebook
post #12 of 12 (permalink) Old 05-27-2004, 09:08 AM
cfm
Registered User
 
Join Date: Mar 14,2003
Location: US
Posts: 19,039
Re: cam for zz502

Quote:
Originally posted by bskaggshd
Maybe you can help me with what cam to put in to a ZZ502/502hp with out any major changes. like pistons. I want to go to a solid lifter and better springs so I can run out the rpm more that 5800. I currently run this on injected alky, at 38Degrees of timing. it is not in a boat, its in a rear engine dragster. I was told by a friend that this was the place to come to get answers on the zz502. Any help is greatly appreciated.

Thanks
Bill
Alcohol, on this low compression? I thought 13 - 14:1 was where you want to be with Alky?

Anyway, good spec's for a solid roller would be somewhere around 250 at .050" with a high rise single plane - HV/Brodix 2000 or such.

Ok, back to boats.
cfm is offline  
Quote Quick Reply Share with Facebook
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Speedwake 2.0 forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome