1970 LS5 Cam - Corvette Forum : DigitalCorvettes.com Corvette Forums
Go Back   Corvette Forum : DigitalCorvettes.com Corvette Forums > C3 Corvette Forums > C3 Corvette
Register Forums Garage Garage Mark Forums Read Auto EscrowInsurance


C3 Corvette
C3 Corvette General | Technical | Performance | Aftermarket | Discussions

Other sections:
Corvettes Classifieds
Corvette Detailing & Car Care
Corvette Audio/Video/Radar
General Automotive/Shop/Tools
Corvette Performance Driving/Racing

( Sponsored by: Zip Corvette Parts )

Custom Image Corvettes
A&A Corvette
Corvette tuner

Corvette aftermarket products


Parts & Products
Race Ramps
Melrose Motorsports
Parts Taxi
Pfadt Racing
Madvette Motorsports
Hi-tech Custom Concepts
Corvette aftermarket products
Corvette Garage
Corvette Parts and Accessories
Corvette Car Care Products
Corvette HID

Bob Bondurant School of High Performance Driving
Corvette driving school

Cray Wheels

Thread Tools
Old 11-15-2012, 07:29 PM   #1
Robert H
DC Crew
Posts: 2
Member #120226
Member since: Nov 2012

Thanks: 0
Thanked 0 Times in 0 Posts
1970 LS5 Cam

I have a 1970 Convertible, 4-speed, 454 (390 HP LS5), and I want to return to the stock cam. I have been looking around the net, and have become confused, as there seems to be differing beliefs on what that cam is. The numbers that show up most often for the 1970 LS5 are GM3883986 with 214/218 deg dur @ .05', .461/.480 lift,114 or 115 deg L/S angle. However, I have also seen GM3874872 244/284 @.008", .398"/.430" claimed as the correct part for this car. Another data point is Zip Corvette--they claim their cam "EN150" is correct stock spec for the 70-74 Corvette 454, and it is 193/204 @.050, and .440/.440 lift. I also notice that they sell their "EN-149" cam for 67-69 390-400HP which is about the same spec as the GM3883986--that is 214/218 @.050, .461/.480 lift. Also note that this is essentially identical specs to Crane #969391 from summit: 214/218 @ .050, .461/.480 lobe sep 115, “grind number”= 3883986. Can anyone shed some light on what is the correct stock specs for the 1970 LS5??
Robert H is offline   Reply w/quote Quick reply to this message
Sponsored Links
Old 11-15-2012, 10:22 PM   #2
Sir Dude
iburke's Avatar
Posts: 17,429
Member #6081
Member since: Dec 2003
Location: St Joseph MO.

My Corvette(s)
1971 T-Top

Thanks: 38
Thanked 72 Times in 50 Posts
Good question. I will see if I have any info on that. The 2 cams you mention sound like the diff between the 425 hp LS6 with aluminum heads and the 365 hp LS5 with iron heads. The two also had diff carbs and manifolds.

I believe that the LS6 was also a solid lifter cam.
iburke is offline   Reply w/quote Quick reply to this message
If life gets any better, I don't know if I can handle it.
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Corvette Forum : DigitalCorvettes.com Corvette Forums forums, you must first register.
Please enter your desired user name (12 CHARACTERS MAXIMUM), your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
City / State / Country?
Where you live
What kind of Corvette(s) do you own?
This field is not required.
Please select your insurance company (Optional)


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.

Thread Tools

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 Off

Forum Jump

Powered by vBadvanced CMPS v3.2.2

All times are GMT -6. The time now is 11:28 PM.

Powered by vBulletin® Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
© 2003-2011, DigitalCorvettes.com - All Rights Reserved