Results 1 to 2 of 2

Boosting a 427 LS2?

This is a discussion on Boosting a 427 LS2? within the Forced Induction forums, part of the LSx Technical Help Section category; ...

  1. #1
    Junior Member topgun1851's Avatar
    Join Date
    Aug 2005
    Location
    Virginia Beach, VA
    Age
    37
    Posts
    31

    Silver
    '02 WS6 Procharged 9psi

    Boosting a 427 LS2?

    Will it be safe to run a 4.125 bore in a LS2 sleeved block with forced induction, 10-15psi. It will also include a 4 crank making a 427. Its either this or keeping the 4 bore with 4 crank 402, 10-15psi. But I really want to do the 427. Aiming for 700-800rwhp.

  2. #2
    Member cailey37's Avatar
    Join Date
    Mar 2006
    Location
    Mississippi
    Posts
    832

    Silver
    1998 Pontiac Trans Am

    Quote Originally Posted by topgun1851 View Post
    Will it be safe to run a 4.125 bore in a LS2 sleeved block with forced induction, 10-15psi. It will also include a 4” crank making a 427. Its either this or keeping the 4” bore with 4” crank 402, 10-15psi. But I really want to do the 427. Aiming for 700-800rwhp.
    Well, it can be boosted as long as the compression is good, but any time you start messing with the bores and going bigger something has to give eventually. To get the sleeves in there you have to have more material taken out of the block. Go with a 402, you can get the HP you want with that. What you really have to ask yourself is how long do you want the motor to last? Stretch the motor to a 427 and throw boost on it and it wont last 100K miles. Well, for that matter you can't expect a 402 to do the same.
    Last edited by cailey37; 02-23-2008 at 04:43 AM.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Help: A problem after boosting
    By CAMSS2002 in forum Forced Induction
    Replies: 7
    Last Post: 08-05-2009, 09:36 PM

Bookmarks

Posting Permissions

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