LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Converting two bolt main block to a fourbolt main...

Thread Tools
 
Search this Thread
 
Old Oct 2, 2006 | 07:35 AM
  #1  
taylorcrzy's Avatar
Thread Starter
Registered User
 
Joined: May 2006
Posts: 138
From: Nashville, TN
Converting two bolt main block to a fourbolt main...

Is it possible to convert the block over to a four bolt main with the motor still installed? Other than dropping down the K-member is it possible to do it? Just curious if anyone had tried to do it.
Old Oct 2, 2006 | 08:48 AM
  #2  
sssalah's Avatar
Registered User
 
Joined: Nov 2001
Posts: 1,152
From: Bahrain
Re: Converting two bolt main block to a fourbolt main...

Not possible. It'll need to be align bored/honed in a machine shop.
Old Oct 2, 2006 | 09:02 AM
  #3  
engineermike's Avatar
Registered User
 
Joined: Mar 2002
Posts: 2,743
From: Baton Rouge, LA, USA
Re: Converting two bolt main block to a fourbolt main...

Originally Posted by sssalah
Not possible. It'll need to be align bored/honed in a machine shop.
I second that motion.
Old Oct 3, 2006 | 11:20 AM
  #4  
taylorcrzy's Avatar
Thread Starter
Registered User
 
Joined: May 2006
Posts: 138
From: Nashville, TN
Re: Converting two bolt main block to a fourbolt main...

Thanks for the reply.
Old Oct 3, 2006 | 01:56 PM
  #5  
wrd1972's Avatar
Registered User
 
Joined: Aug 2005
Posts: 4,405
From: Kantuckee Yo'
Re: Converting two bolt main block to a fourbolt main...

Originally Posted by taylorcrzy
Is it possible to convert the block over to a four bolt main with the motor still installed? Other than dropping down the K-member is it possible to do it? Just curious if anyone had tried to do it.
Only if your a magician.
Old Oct 3, 2006 | 02:08 PM
  #6  
confused327's Avatar
Registered User
 
Joined: Apr 2005
Posts: 220
From: Western NY
Re: Converting two bolt main block to a fourbolt main...

why would you want to, switching from a 2 bolt to a 4 bolt doesn't really matter untill you are making a good amount of power, enough power where you would have to have the motor out to accomplish it.(excluding power adders)
Old Oct 3, 2006 | 02:35 PM
  #7  
shoebox's Avatar
Registered User
 
Joined: Dec 1969
Posts: 27,725
From: Little Rock, AR
Re: Converting two bolt main block to a fourbolt main...

Originally Posted by taylorcrzy
Is it possible to convert the block over to a four bolt main with the motor still installed? Other than dropping down the K-member is it possible to do it? Just curious if anyone had tried to do it.
The hardest part would be trying to fit a machine shop underneath the car.
Old Oct 3, 2006 | 03:25 PM
  #8  
sbs's Avatar
sbs
Registered User
 
Joined: Feb 2004
Posts: 1,154
From: VA
Re: Converting two bolt main block to a fourbolt main...

Originally Posted by shoebox
The hardest part would be trying to fit a machine shop underneath the car.

Clearly he already has that part solved, in order to do enough engine mods to require a 4-bolt in the first place...
Old Oct 3, 2006 | 08:33 PM
  #9  
FastLt1's Avatar
Registered User
 
Joined: Oct 2005
Posts: 195
From: Lebanon, VA
Re: Converting two bolt main block to a fourbolt main...

You could probably do ARP studs without removing engine and be as strong as stock 4 bolt.
Old Oct 4, 2006 | 09:18 AM
  #10  
bmwmcars's Avatar
Registered User
 
Joined: Apr 2006
Posts: 129
Re: Converting two bolt main block to a fourbolt main...

Originally Posted by FastLt1
You could probably do ARP studs without removing engine and be as strong as stock 4 bolt.
Not sure if this is accurate or not, but 3 machine shops have all told me that even doing studs requires line bore/hone, since it changes the clamping force applied to the caps.
Old Oct 4, 2006 | 07:45 PM
  #11  
FastLt1's Avatar
Registered User
 
Joined: Oct 2005
Posts: 195
From: Lebanon, VA
Re: Converting two bolt main block to a fourbolt main...

Best listen to them. It was just a thought. I did it on a old SBC. But didn't know about torque plates and align honing. Just wanted something harder to blow up.
Old Oct 5, 2006 | 12:49 AM
  #12  
rskrause's Avatar
Moderator
 
Joined: Dec 1969
Posts: 10,745
From: Buffalo, New York
Re: Converting two bolt main block to a fourbolt main...

Originally Posted by bmwmcars
Not sure if this is accurate or not, but 3 machine shops have all told me that even doing studs requires line bore/hone, since it changes the clamping force applied to the caps.

That is accurate. It needs to be align honed if you install studs.

Rich
Old Dec 20, 2006 | 02:53 PM
  #13  
taylorcrzy's Avatar
Thread Starter
Registered User
 
Joined: May 2006
Posts: 138
From: Nashville, TN
Ok, I will just build a spare block and stroke it then pull the original motor and swap everything over and reinstall the new motor. Thanks
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
HectorM52
Parts For Sale
26
Jul 30, 2017 11:46 AM
Richardan15
Parts For Sale
2
May 30, 2015 08:36 AM
maybe2fast
Parts For Sale
11
Mar 16, 2015 09:45 AM
pimpss96
LT1 Based Engine Tech
4
Feb 12, 2015 01:28 PM
97 RedSS
LT1 Based Engine Tech
11
Jun 10, 2003 07:58 PM




All times are GMT -5. The time now is 05:07 AM.