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10-08-2019 #1
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LM7 truck ECM compatible w/Holley EFI?
I have a stock 5.3 truck engine/4L60 sitting in an 56 Chevy. It had a Holley EFI throttle body on a Holley carb style intake when purchased. Is this compatible with the GM ECM and if it is what general mods need to be made? I am sure the computer will need a re-flash as well. I am new to his modern stuff.
Thanks, Bob
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10-08-2019 #2
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If the LM7 cam stock with drive by cable (DBC) throttle body, which google images shows DBC. I would think it would work with the stock ECM. Do you already have a harness?
Big dreams, small pockets....
Chris--
'72 Cutlass S LSA/T56 Magnum
Bowler Performance, Rushforth Wheels, ATS, Holley EFI, KORE3, Ridetech
Project Motor City Madness
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10-08-2019 #3
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It has a stock cam as far as I know. Original DBC I think ~2001 engine. I do not have a harness except the stock GM stuff.
Originally Posted by csouth
Thanks, Bob
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10-08-2019 #4
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You should be good. You would need definitely have your computer flashed for standalone. I would also for ease of installation just buy a harness that would be plug and play, 4 wire hookup. PSI Conversions, Current Performance are a few I have seen with great product. wires to:Key on/run, constant power, fuel pump and ground; you're off and running.
Big dreams, small pockets....
Chris--
'72 Cutlass S LSA/T56 Magnum
Bowler Performance, Rushforth Wheels, ATS, Holley EFI, KORE3, Ridetech
Project Motor City Madness
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10-09-2019 #5
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Thank you for the advice...I'll check out the harness people. Originally Posted by csouth
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