LS3 vs. BBC - CorvetteForum - Chevrolet Corvette Forum Discussion

C1 & C2 Corvettes General C1 Corvette & C2 Corvette Discussion, Technical Info, Performance Upgrades, Project Builds, Restorations

LS3 vs. BBC

Thread Tools Search this Thread
Old 11-11-2016, 12:53 AM   #1
CF Senior Member
Thread Starter
BruZe06's Avatar
Member Since: May 2003
Location: Rowland Heights CA
Posts: 187
Thanked 1 Time in 1 Post
Default LS3 vs. BBC

Assuming both have aluminum heads, similar internals and intake, how much heavier is an iron block BBC over the aluminum block LS3 (with 525HP)?

Last edited by BruZe06; 11-11-2016 at 12:54 AM.
BruZe06 is offline   Reply With Quote
Old 11-11-2016, 01:29 AM   #2
CF Senior Member
daz_au's Avatar
Member Since: Oct 2011
Location: Sydney NSW
Posts: 535
Thanks: 0
Thanked 28 Times in 27 Posts

Weights out there vary a bit , but the average seem to be high 600's for normal BBC and close to 600 even for the alum headed versions.

Bare LS3 is close to 400, but 450 is often quoted for complete engines.

Even changing my 327 to LS3 lifted the front of the car at least 1/2" on stock springs.
daz_au is offline   Reply With Quote
Go Back   CorvetteForum - Chevrolet Corvette Forum Discussion >
Reload this Page
  • LS3 vs. BBC

    Related Topics
    Thread Thread Starter Forum Replies Last Post
    BBC removal Simmo C3 Tech/Performance 17 02-10-2018 05:32 AM
    Best Aftermarket Hi-po Motor?? BlackRocket C3 Tech/Performance 15 12-23-2017 09:10 AM
    FS: Zl1-l88-l89-074 bbc 427-454 copo heads GUSTO14 C1 & C2 Parts 2 06-08-2017 09:51 PM
    best BBC qjet intake aaronz28 C1 & C2 Corvettes 1 03-25-2017 12:44 PM
    1973 LS4 engine upgrade c6silver C3 Tech/Performance 40 06-05-2016 01:41 AM

    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

    Sponsored Ads
    Vendor Directory

    All times are GMT -4. The time now is 10:09 AM.

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