aluminum girdle, iron block 4.6

+ Reply to Thread
Results 1 to 3 of 3
  1. #1

    Default aluminum girdle, iron block 4.6


    i'm taking an iron block out of an '07 cvpi and rebuilding it myself from scratch. this is my first build, but i've done a good amount of research and have taken a couple engine classes at the local college. my question is whether or not i can use an aluminum main girdle on the cast iron block. i know a lot of people will say that it isn't necessary, that the stock main caps aren't prone to walking, that it's a waste. i know others will say if i'm going above 550hp it's not a bad idea. i'm not 100% sure what my top end is going to look like, but just in case i decide to put some serious muscle into it i'd like to make it a little more sturdy than the stock two bolt mains. all i've been able to find are aluminum girdles, which i'm guessing are designed for the aluminum 4.6 blocks. if anyone has an answer, i'd appreciate it. also, if someone has a link for a girdle that isn't aluminum, i'd appreciate that too.

    all the best...

  2. Remove Advertisements

  3. #2
    Junior Member Array jburcham04's Avatar
    Join Date
    Jan 2017
    S.E. GA


    I would go ahead and make it to hold the most power that you see in the future.

  4. #3


    that's what i was thinking. what's the worst that can happen from putting it in while everything is apart and then not putting enough power to really "need" it?

  5. Remove Advertisements

+ Reply to Thread

Similar Threads

  1. WTT: 5.4L iron block for 4.6L aluminum
    By bigray327 in forum Engine Parts
    Replies: 3
    Last Post: 08-29-2008, 07:31 PM
  2. Iron or Aluminum Block
    By FredW in forum 1996 - 2004 Mustang GT
    Replies: 21
    Last Post: 06-30-2006, 12:08 AM
  3. Aluminum or Iron Block
    By BanginStang02 in forum 1996 - 2004 Mustang GT
    Replies: 14
    Last Post: 07-16-2005, 08:01 AM
  4. Iron or Aluminum block?
    By 78mphgpr in forum 2003 - 2004 SVT Mustang Cobra
    Replies: 8
    Last Post: 11-09-2004, 01:18 PM