Largest cam without changing valve springs? - Corvette Forum

Go Back   Corvette Forum > C3 Corvettes, 1968 - 1982 > C3 Tech/Performance
Log In 
Register FAQ Search Today's Posts Mark Forums Read Vendor Directory
Search

C3 Tech/Performance
V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette

Largest cam without changing valve springs?

Reply
 
 
 
Thread Tools Search this Thread
Old 09-23-2005, 09:18 AM   #1
surfshark
CF Senior Member
 
surfshark's Avatar
 
Member Since: Mar 2005
Posts: 559
Location: James Island South Carolina
Thanks: 0
Thanked 0 Times in 0 Posts
Default Largest cam without changing valve springs?

I know I could call a supplier, but they do want to sell you stuff... What is the largest hydraulic camshaft that you can put in a 350 (041 heads) and not have to change/upgrade the valve springs? I want to keep it as simple and cheap as possible because I'll probably be selling the motor in several months. Thanks as always for your input.

Last edited by surfshark; 09-23-2005 at 09:20 AM.
surfshark is offline   Reply With Quote
Old 09-23-2005, 12:30 PM   #2
Nate '69
CF Senior Member
 
Nate '69's Avatar
 
Member Since: Sep 2004
Posts: 579
Location: North Texas
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Just go for a 210-218 duration cam @.050. Anything larger won't match the heads, intake gears etc. You'll have good torque.
Nate '69 is offline   Reply With Quote
Old 09-24-2005, 12:17 AM   #3
jackson
CF Senior Member
 
Member Since: Sep 2001
Posts: 4,208
Location: Timmonsville SC
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by surfshark
I know I could call a supplier, but they do want to sell you stuff... What is the largest hydraulic camshaft that you can put in a 350 (041 heads) and not have to change/upgrade the valve springs? I want to keep it as simple and cheap as possible because I'll probably be selling the motor in several months. Thanks as always for your input.
If they're like the springs that came in the 041 head, the simple answer is no more than 0.480"-0.490" valve lift. If the springs are +20 years old, I wouldn't put a new higher-lift cam under them ... even though they might handle the lift when you measure for coil bind ... they are WEAK! ... and may break when running under the new stress! I'd pop for a new set of $25 "Z28" springs.
SpeedPro-SealedPower P/N VS739R
Howards Cams P/N 98214
Elgin P/N RV943X

For duration reference, stock L82 was 222/222.

Three good choices of hydraulic flat tappet cam & lifter kits are:
SpeedPro-SealedPower P/N KC1062R 0.468"/0.480" 220/231
Summit P/N SUM-K1105 0.465"/0.488" 224/234
Elgin P/N E1015 0.465"/0.488" 224/234 (cam only, no lifters)

Want a little less cam?
SpeedPro-SealedPower P/N CS1013R 0.443"/0.465" 214/224
Elgin P/N E1166 0.453"/0.480" 216/218 (cam only, no lifters)

Last edited by jackson; 09-24-2005 at 12:28 AM.
jackson is offline   Reply With Quote
Old 09-24-2005, 01:04 AM   #4
surfshark
CF Senior Member
 
surfshark's Avatar
 
Member Since: Mar 2005
Posts: 559
Location: James Island South Carolina
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Thank you both for your advice. The heads were reconditioned by a local machine shop with new components and the motor only has 15,000 miles on it. It's been off the road for several years though.
surfshark is offline   Reply With Quote
Go Back   Corvette Forum > C3 Corvettes, 1968 - 1982 > C3 Tech/Performance
Reload this Page Largest cam without changing valve springs?
 
 
Reply


Similar Threads
Thread Thread Starter Forum Replies Last Post
C3 Shortened Composite 79 C3 C3 Tech/Performance 5 06-04-2015 11:33 PM
What Garmin do you have in your cubby? Blue Flame-less Joe C7 General Discussion 26 03-10-2015 10:33 PM
Looking to trade ProCharger Big Red Open bypass valve for your TiAL Q 50mm Sea Five C5 Parts for Sale/Wanted 16 09-22-2014 04:39 PM
Largest Rear Tire Size, C6 Base Coupe 3whit C6 Tech/Performance 17 07-17-2013 03:41 PM
largest tires that will fit on stock 15X8 rims? Drag Radials possible? Corvette_fetish C3 Tech/Performance 6 03-18-2004 12:00 PM


Tags
bbc, big, c6, cam, changing, e1015, elgin, kit, largest, lift, lifter, springs, valve, valvesprings, whats

Thread Tools Search this Thread
Search this Thread:

Click for 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

Forum Jump


 

All times are GMT -4. The time now is 03:19 PM.