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difference between lt1 and ls1 4l60e's

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Old Oct 17, 2007 | 05:11 PM
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Default difference between lt1 and ls1 4l60e's

i'm looking at swapping a ls1 into my lt1 car. i have a stall and built trans that i would like to keep.

from what i understand, i can only use 5 out of the 6 bolts to attach the trans to the motor, but what about the flexplate, does the lt1 one work, or do i need a ls1 or custom one? what about the electronics, are the hook ups the same if i bought a ls1 wiring harness and plugged it in?

anything else i'm missing?
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Old Oct 18, 2007 | 10:52 AM
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I believe the torque converter may sit 3 mm back due to the lt1 crankshaft. The LS1 crankshaft will make the flexplate more forward, I have heard guys using washers.
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Old Oct 18, 2007 | 12:07 PM
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Originally Posted by steve40
i'm looking at swapping a ls1 into my lt1 car. i have a stall and built trans that i would like to keep.

from what i understand, i can only use 5 out of the 6 bolts to attach the trans to the motor, but what about the flexplate, does the lt1 one work, or do i need a ls1 or custom one? what about the electronics, are the hook ups the same if i bought a ls1 wiring harness and plugged it in?

anything else i'm missing?
Buy a tci ls1 flexplate, It has the crank bolt pattern of the ls1 but has both style converter patterns(ls1/lt1/sbc). It also comes with the pilot spacer you need to adapt the older (lt1) style converters to the ls1 crank pilot. The electronics are controlled by the pcm, which you will change anyway when you go to the ls1. Its pretty simple.
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Old Oct 18, 2007 | 12:15 PM
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+1 to what 408z28 said
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Old Oct 18, 2007 | 05:03 PM
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Originally Posted by 408z28
Buy a tci ls1 flexplate, It has the crank bolt pattern of the ls1 but has both style converter patterns(ls1/lt1/sbc). It also comes with the pilot spacer you need to adapt the older (lt1) style converters to the ls1 crank pilot. The electronics are controlled by the pcm, which you will change anyway when you go to the ls1. Its pretty simple.
its the same sensors for the electronics....just have to plug in the harness?

i take it you mean this flexplate?

http://www.compperformancegroupstore...ct_Code=399753

and the spaces are already welded on the flexplate?
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