max lift on stock vortec heads?? - Third Generation F-Body Message Boards


Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!

max lift on stock vortec heads??

Reply
 
Thread Tools Search this Thread
Old 07-19-2003, 04:22 PM   #1
Senior Member
Thread Starter
 
Join Date: Jan 2002
Location: Cinnaminson, NJ
Posts: 1,537
max lift on stock vortec heads??

Hey guys what is the max lift u can run on the vortec heads, i was thinking about getting some from summit but my cam has 480 lift and 230 duration at .50 would it work?? also if not around how much would a machine shop charge to grind the seats down for me?? thanks so much guys.
89formula#1 is offline   Reply With Quote
Old 07-19-2003, 04:28 PM   #2
Senior Member
 
Join Date: Mar 2002
Location: Sharon, CT
Posts: 288
I'm pretty sure that they can take .460 lift stock. Scoggin Dickey sells upgraded vortecs for more lift for not much more money. Thats where I got mine.
Killogy is offline   Reply With Quote
Old 07-19-2003, 08:22 PM   #3
Member
 
Join Date: Dec 2002
Posts: 195
ive heard 430 or so max for the stock ones off a truck, and the new summit catalog says .475 now, but said .450 or something last month... the scoggin dickey catalog says about the same (.450, but i dont remember right and dont want to get it out...)

BUT the new GM performance parts catalog says the gm vortec performance heads, part numer ending in 060 i think, can take .475 stock... so either way, .480 wont work unless you get the upgraded heads from scoggin dickey or gmpp makes an upgraded valvespring version too...

if you have already bought some vortec heads, you can buy a tool that will machine the 3 things you need machined at the same time for the bigger diameter valvesprings from crane cams i think... (i believe comp also makes a tool that will do some of the machine work)

or you could take them to a machine shop and pay a little more $$$

good choice on vortecs tho, theyre good heads, and for 500$ theyre a bargain cause the flow numbers are better than some aftermarket heads that cost 400$ more.... i just put a set on the 400 im puttin in my 83... (goodbye 305 )
83crossfireZ28 is offline   Reply With Quote
Old 07-19-2003, 09:11 PM   #4
Supporter/Moderator
iTrader: (5)
 
ShiftyCapone's Avatar
 
Join Date: Feb 2001
Location: Cincinnati, OH
Posts: 11,310
.480 is the absolute max lift on those heads. Most buildups don't take them past .475 without machining them to take .520 or higher.
ShiftyCapone is offline   Reply With Quote
Old 07-19-2003, 11:08 PM   #5
Senior Member
 
Join Date: Apr 2003
Location: B'ville, WV
Posts: 1,781
Pace Parts says .480 max lift with these heads. I wouldnt chance it tho. Look into maybe a .460 lift max just to be safe.
88Camaro350 is offline   Reply With Quote
Old 07-19-2003, 11:45 PM   #6
Member
 
Join Date: Dec 2002
Location: Florida
Posts: 134
right around ..470-480 lift the bottom of the retainer starts to hit the top of the valve stem seal.
Aron213 is offline   Reply With Quote
Old 07-20-2003, 12:10 AM   #7
Supreme Member
 
Join Date: Apr 2001
Location: USA
Posts: 4,969
You need this, and this.

And the spring kit you want is here, #VSA 3

I know it says "No machining required", but that's not for Vortec heads.

Last edited by AJ_92RS; 07-20-2003 at 12:13 AM.
AJ_92RS is offline   Reply With Quote
Old 07-20-2003, 07:00 AM   #8
ede
TGO Supporter
 
Join Date: Aug 1999
Location: Jackson County
Posts: 14,811
factory springs won't work, or last at that lift, pull out studs will fail, valve guide clearance becomes and issue around .45. you need to check clearances, not just thrown a cam in the short block, or heads on a short block without checking that everything is instaleld correctly. shop here charges around 150 dollars to grind seats. i use to get it done before i started doing my own for 40 dollars if to took everything apart. spring seats cost me 2 dollars each to get enlarged. i mill my and install my own screw in studs so no idea on cost. valve guides would be cheap and easy to mill, but i do my own so no idea on cost.
ede is offline   Reply With Quote
Old 07-20-2003, 02:19 PM   #9
Senior Member
Thread Starter
 
Join Date: Jan 2002
Location: Cinnaminson, NJ
Posts: 1,537
well if i buy them i will just get the ones already done. anyways with the head si have in my sig do u think by putting on the vortecs i will kill the liuttle bit of gas milage that i get? I wasn;t sure on this cause they are still 1.94 heads. but i am guessing cause they flow so much better then will hurt it a bit. thanks for any input
89formula#1 is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Flexplate prob 96 L31 5.7L vortec to 84 camaro 84z96L31vortec Tech / General Engine 7 08-20-2017 12:16 AM
Need advice on a "chip" NWAsonoma TBI 4 08-18-2015 05:45 PM
Quick question. happyhapka TPI 3 08-15-2015 04:42 PM
[FL] Vortec Stealth Ram Intake Setup L98GTA87 Engine/Drivetrain/Suspension Wanted 1 08-11-2015 06:55 PM
Flexplate prob 96 L31 5.7L vortec to 84 camaro 84z96L31vortec North East Region 1 08-10-2015 08:27 PM


Go Back   Third Generation F-Body Message Boards >

Tags
14, 355, 480, 97, cam, heads, lift, max, mile, sound, springs, stock, times, valve, vortec

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


Advertising
Featured Sponsors
Vendor Directory

1982 Camaro '82 || 1983 Camaro '83 || 1984 Camaro '84 || 1985 Camaro '85 || 1986 Camaro '86 || 1987 Camaro '87 || 1988 Camaro '88 || 1989 Camaro '89 || 1990 Camaro '90 || 1991 Camaro '91 || 1992 Camaro '92


All times are GMT -5. The time now is 04:51 AM.


All content copyright 1997 - 2014 ThirdGen.org. All rights reserved. No part of this website may be reproduced without the expressed, documented, and written consent of ThirdGen.org's Administrators.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: