Generation III Internal Engine 1997-2006 LS1 | LS6
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LS1 to LM7

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Old Oct 6, 2015 | 11:26 AM
  #1  
Z28Dave's Avatar
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Default LS1 to LM7

Alright so I'm swapping out my LS1 to an LM7 since the sleeve had a massive Crack and a chunk of the piston is missing. Now I'm more than positive that everything bolts on and it's a direct swap.

My main concern is the knock sensors, LS6 valley cover, and the tune, how bad will it thrown off by the .4 loss of displacement?

The setup is:
Ported 853 Heads
Ported LS6 intake
Ported LS1 TB
LS6 valley cover
Thunder racing 224 cam
Thunder racing 7.400 pushrods
LS7 lifters
Single Beehive Springs
Powerdyne BD -11A

LS1 to LM7-forumrunner_20151006_102400.png
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Old Oct 6, 2015 | 11:43 AM
  #2  
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LS6 valley cover should be just as direct as everything else.

Your tune won't be too far off, the 5.3 will just have to spin a little faster to "catch up" to the airflow demands that the larger ls1 had, so everything is going to seem slightly retarded.
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