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ECU options for LT1-> LS Swap

Old 08-06-2018, 08:30 PM
Staging Lane
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Join Date: Mar 2007
Posts: 74
Default ECU options for LT1-> LS Swap

I am swapping a Gen4 5.3 (LC9) into my 1996 z28. Plan is for it to be a Turbo car. I am somewhat confused/torn between some different ECU/wiring options. I may have missed some, but the ones I currently see are:

1) Modify my existing Wiring Harness to work with the LS and LS ECU.

Pro's: Cheaper, can pick and choose what I want on Harness.
Con's: Time consuming, frustrating, could nickel and dime me.

2) Buy an LS1 wiring harness/ecu.

pros: relatively cheap, ready to go. I already have HP tuners. Probably the easiest option?
cons: need to adapt 58X to 24X, somewhat hard to find an unmolested ls1 harness.

3)MS3 goldbox

pros: lots of capability
cons: seems like a long process, maybe difficult? more expensive

4) Holley HP EFI

pros: seems very complete, user intuitive
cons: cost

Can I use a later ECU to avoid the 58x->24x lingenfelter box? I would like to retain the use of eh factory gauges, hvac controls, etc.

Any other suggestions or input?

Last edited by V8sounds; 08-06-2018 at 09:10 PM.
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