Notices
C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

What valve springs should I get.

 
Old 07-03-2019, 02:36 AM
  #1  
Mason123
CF Member
Thread Starter
 
Member Since: Dec 2018
Posts: 71
Likes: 0
Received 3 Likes on 1 Post
Default What valve springs should I get.

What valve spring size should I get. Single or dual and is there any specific size?

1985 corvette.
Mason123 is offline  
Old 07-03-2019, 03:32 AM
  #2  
Joe C
CF Senior Member
 
Member Since: Aug 2000
Posts: 10,932
Received 540 Likes on 471 Posts
Default

Originally Posted by Mason123 View Post
What valve spring size should I get. Single or dual and is there any specific size?

1985 corvette.

installed Elgin Industries service replacement Z28 (type) springs, retainers, and locks in my (stock) 85 when I did the valve job. about 12-13K miles (3 years) - no issues to date.

here's the specs...

The Z28 springs are stock outside diameter and can be used as a drop-in fit in many 1955-1993 small block Chevy V8 cast iron cylinder heads. They work great for stock, towing and most mild performance cams and work best with cams up to 0.500" lift. Many sellers claim these springs can handle up to 0.550" maximum lift but I personally don't believe they have enough spring pressure to handle more than 0.500" lift.

Valve Spring Specifications:
  • Spring Part Number: RV943X
  • Outside Diameter: 1.260"
  • Inside Diameter: 0.785"
  • Closed: 114 lbs. @ 1.710"
  • Open: 318 lbs. @1.210"
  • Coil Bind @: 1.160"
  • Spring Type: Single with damper
side note - Elgin Industries is a tier one supplier to GM. it could be the original OE springs were Elgin parts (???). bought mine thru fleabay (seller - classic engine supply) - current price around $66-shipped (spings, retainers, locks) https://www.ebay.com/itm/New-Z28-Sty...37fd%7Ciid%3A1


Last edited by Joe C; 07-04-2019 at 07:32 AM.
Joe C is offline  
Old 07-03-2019, 03:45 PM
  #3  
Kevova
CF Senior Member
 
Kevova's Avatar
 
Member Since: Sep 2013
Location: near the thumb in the mitten
Posts: 4,104
Received 386 Likes on 370 Posts
Default

New cam go with cam suggested springs and retainers. Increased spring rate can overtax stock retainer leading to a "bad day." Stock l82, there is no benefit to having stiffer springs than you actually need.
Kevova is offline  
Old 07-05-2019, 07:38 AM
  #4  
BLKMAMBA
CF Senior Member
 
BLKMAMBA's Avatar
 
Member Since: Jan 2017
Location: West Deptford New Jersey
Posts: 601
Received 33 Likes on 29 Posts
Default

Springs are directly related to cam selection. call or email LLoyd Elliot from Elliot Portworks, he is awesome and extremely helpful.




BLKMAMBA is offline  
Old 07-09-2019, 03:18 PM
  #5  
tcinla
CF Senior Member
Support Corvetteforum!
 
tcinla's Avatar
 
Member Since: Nov 2016
Location: Los Angeles CA
Posts: 1,764
Received 356 Likes on 246 Posts
Default

If you get a c7 or c8, problem solved... If they're not too 'ugly'.

Originally Posted by Mason123 View Post
What valve spring size should I get. Single or dual and is there any specific size?

1985 corvette.
tcinla is offline  
 


Thread Tools
Search this Thread
Quick Reply: What valve springs should I get.


Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

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.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: