Thanks Thanks:  0
Dislikes Dislikes:  0
Results 1 to 3 of 3
  1. #1
    New Member
    Join Date
    Oct 2009
    Indianapolis, IN
    1981 Corvette
    Post Thanks / Like

    Default Intake manifold options for an 81

    I'm looking at upgrading my intake manifold to try to get some more HP. My 81 is stock for the most part. Previous owner removed the cat and added sidepipes. I've seen a few different Edelbrock options (2101 and 3701). I intended on keeping the CCC controlled stock carb.

    Any insights are appreciated. Thx

  2. #2
    Intake manifold options for an 81 22229stingray81's Avatar
    Join Date
    Mar 2002
    Midlothian, VA
    1981 white/blue interior automatic
    Post Thanks / Like


    I have an Edlebrock Performer intake, however, from what I understand, power increases are negligible. The stock intake is aluminum, and already pretty good. Changing the heads, and a true-dual exhaust are where the big gains are.
    22229th Vette in '81

  3. #3
    Administrator Tom Bryant's Avatar
    Join Date
    Nov 2000
    Edgerton, Ohio, United States
    1959 black 270hp (9/2/69) 1981 Beige L81(10/20/80)
    Post Thanks / Like


    Given the RPM operating range of a stock L81 I think you will be disappointed with just a manifold change. Your stock manifold will most likely match the performance of either of these manifolds in the idle to 5500 rpm range. I remember a test way back when the 2101 first came out where a stock Chevy cast iron Q-Jet manifold out performed the Edelbrock in the low to mid rpm range and was a match in the upper revs. The only benefit was appearance and weight for the alloy manifold. You already have an aluminum intake that is probably better than the old iron ones or at least a match. The alloy intake and magnesium valve covers were put on the L81 for weight savings mostly.

    With the exhaust already opened up I feel you would get more bang for your buck with a camshaft change. Keeping the CCC system will require careful selection of the right cam for it to be happy with the computer. The best way to do that is to get a recommendation directly from the cam manufacturer, especially if you don't want to do any other mods. They know better what will match than any number of online forum opinions unless you are going to duplicate someone elses success part for part.

    NCRS 1360.............SACC 2082.............C1 Registry..............L81 Registry
    Likes Vettehead Mikey, 22229stingray81 liked this post
    1959 Chevrolet Corvette 1981 Chevrolet Corvette , 350 L81 automatic Frost Beige

Similar Threads

  1. L98 Intake Options
    By porras in forum C4 Technical and Performance
    Replies: 4
    Last Post: 10-05-17, 03:50 AM
  2. stock manifold to header options..
    By jims427400 in forum C3 Technical and Performance
    Replies: 13
    Last Post: 11-21-09, 06:23 PM
  3. Replies: 16
    Last Post: 10-17-06, 04:46 PM
  4. 86 Replacement Intake Manifold options
    By robertwilbanks in forum C4 General Discussion
    Replies: 9
    Last Post: 06-08-04, 05:19 PM
  5. Intake manifold options
    By newonad in forum C3 Technical and Performance
    Replies: 4
    Last Post: 01-18-02, 09:15 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts