L92 heads on a LM4?
Thread Starter
Teching In
Joined: Apr 2005
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From: MS
L92 heads on a LM4? I might be building an engine soon for my RX-7, I'm still tossing around ideas though. I recently found out about the LM4 engine, all aluminum truck engine that came in small SUV's. From what I understand it's the same design as the LM7, so can it be bored? If so, how much? Would it be possible to bore it enough for the L92 heads to work? I've searched, but there isn't really a lot of info on the LM4. I know the LS2 would be a better choice, but I'm trying to stay in a certain price range... thanks in advance for any help.
EDIT: If this should be in a different section of the forum, I'm sorry. I thought this would be the appropriate place to post...
EDIT: If this should be in a different section of the forum, I'm sorry. I thought this would be the appropriate place to post...
Last edited by jgonzales; Feb 23, 2007 at 10:05 PM.
Originally Posted by jgonzales
I might be building an engine soon for my RX-7, I'm still tossing around ideas though. I recently found out about the LM4 engine, all aluminum truck engine that came in small SUV's. From what I understand it's the same design as the LM7, so can it be bored? If so, how much? Would it be possible to bore it enough for the L92 heads to work? I've searched, but there isn't really a lot of info on the LM4. I know the LS2 would be a better choice, but I'm trying to stay in a certain price range... thanks in advance for any help.
EDIT: If this should be in a different section of the forum, I'm sorry. I thought this would be the appropriate place to post...
EDIT: If this should be in a different section of the forum, I'm sorry. I thought this would be the appropriate place to post...
Get the LS1.
LM7...not as costly, but iron block/Al heads
Thread Starter
Teching In
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From: MS
Originally Posted by vortec_7
quick tidbit: LM4 is ~ as costly as an LS1.
Get the LS1.
LM7...not as costly, but iron block/Al heads
Get the LS1.
LM7...not as costly, but iron block/Al heads
Thread Starter
Teching In
Joined: Apr 2005
Posts: 46
Likes: 0
From: MS
Originally Posted by Bring the Noise
Hmm Wiki wiki lists the LM4 as a 5.3L.
L92 heads would work only if the block can be bored out to a 4.000" bore (or larger).
L92 heads would work only if the block can be bored out to a 4.000" bore (or larger).
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