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Anybody running a LM7 with stock 5.3 heads?

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Old 04-25-2010, 06:33 PM
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Default Anybody running a LM7 with stock 5.3 heads?

What kind of power are you making and at what boost? How much meth are you spraying?
Old 04-25-2010, 07:41 PM
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had 5.3 heads... didnt get tuned with them though.. decided to go with 243's gave me about 9.1 comp. with a .045 gasket. made 460 at 16 degrees with 9 lbs of boost. THROUGH A UNLOCKED 4L60E
Old 04-25-2010, 08:01 PM
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Do these LM7s bolt right up in place of LS1s?
Old 04-25-2010, 09:22 PM
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Originally Posted by Oh4GTO
Do these LM7s bolt right up in place of LS1s?
yes
Old 04-26-2010, 12:22 AM
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And all the accessories and sensors hook right up? Even the headers?
Old 04-26-2010, 04:17 AM
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557rwhp with a big stall, 11lbs on e85, stock 5.3 with just a gt2-3 cam, pushrods, valve springs.
Old 04-26-2010, 04:40 PM
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Originally Posted by Oh4GTO
And all the accessories and sensors hook right up? Even the headers?
Everything is interchangeable.
Old 04-27-2010, 07:23 AM
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Originally Posted by ss.slp.ls1
Everything is interchangeable.
Except when putting one in a vette!
Learned that the hard way. Went to drop a built LQ4 in a C5 and it wouldnt take the vette motor mounts, there is an extra A/C bracket bung that isnt on the Aluminum block. Had to cut the mount, then it fit
Old 04-27-2010, 08:46 AM
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Originally Posted by cjmatt
Except when putting one in a vette!
Learned that the hard way. Went to drop a built LQ4 in a C5 and it wouldnt take the vette motor mounts, there is an extra A/C bracket bung that isnt on the Aluminum block. Had to cut the mount, then it fit
Like the attached pic, or you modified the block? I'm working on a boosted 4.8 so sorry no info for you.
Attached Thumbnails Anybody running a LM7 with stock 5.3 heads?-dsc00161a.jpg  
Old 04-27-2010, 11:07 AM
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Originally Posted by JoeyGC5
Like the attached pic, or you modified the block? I'm working on a boosted 4.8 so sorry no info for you.
Learned something new.



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