LS Central-MegaSquirt Your Gen 3 & Gen 4 LS Engine

GM Gen 3 and Gen 4 LS engines are capable of BIG power due to the vast selection of OEM and aftermarket parts & electronics.  They are also widely available and share a lot of common traits, making many of their parts interchangeable.  However, not knowing some subtle differences can propel you down a more expensive, time consuming road.  So, first things first- Let’s identify EXACTLY what LS engine you have by answering a few basic questions:

LS ENGINE IDENTIFICATION GUIDE courtesy of Summit Racing

Now that you have identified your power plant, the good news is that AMP EFI offers TWO powerful, affordable plug & play solutions for GM LS Gen 3 (24x) & Gen 4 (58x) engines with a simple drop on harness for either MS3Pro EVO or MS3Pro ULTIMATE ECU’s.  Both are well equipped for controlling these engines, including the stock VVT (variable valve timing) on equipped Gen 4’s, as well as optional 4L60E/4L80E transmission control if you won’t be running a powerglide. Choosing between EVO and ULTIMATE essentially come down to two basic questions:

  1.  Will you be running hi or low impedance fuel injectors? What does this mean?  MS3Pro ULTIMATE will control both, while MS3Pro EVO will only control the more common high impedance injectors.
  2.  Beyond the standard requirements to run your LS engine, what additional inputs (information coming into the ECU from things like sensors & switches) & outputs (commands from the ECU to control solenoids/ relays/ valves/ additional equipment) do you need? If you’re not sure, contact our Tech Team and tell us more about your combo and horsepower goals- we can help.

Chevrolet/ GM Gen 3 & Gen 4 Plug & Play Options:

  • MS3Pro EVO Plug & Play for GM LS Engines, MS3Pro EVO GM LS 24x, MS3Pro EVO GM LS 58x

    GM LS 58x PNP Harness and MS3Pro EVO+ Package

     From: $1,899.99

    MS3Pro EVO GM LS 58x Plug and Play includes an MS3Pro EVO ECU, TunerStudio software and the most rugged & durable GM 58X engine harness on the market.   Experience the MS3Pro EVO. MS3Pro EVO is an evolution, not a revolution- a scaled up, mo...

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  • MS3Pro EVO Plug & Play for GM LS Engines, MS3Pro EVO GM LS 24x, MS3Pro EVO GM LS 58x

    GM LS 24x PNP Harness and MS3Pro EVO+ Package

    5 out of 5
    From: $1,899.99

    Note: This product has been expertly modified from our original 58X harness with only slight adjustments to meet 24X specifications MS3Pro EVO GM LS 24x Plug and Play includes an MS3Pro EVO ECU, TunerStudio software and the most rugged & durable GM...

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All wiring is composed of TechFlex woven, self-extinguishing wrapped, hi-temp TXL & GXL automotive grade wire with OEM Delphi & TE connectors. Reach the battery under the hood or in the trunk with 4 gauge power & 10 gauge ground wires. All relays and fusing live in a single, waterproof fusebox and the fuel pump wiring / relay / fusing is big enough for pumps that can handle 1000whp or more right out of the box (10ga wire, 30amp circuit).  This harness was designed with room to grow!

MS3Pro EVO and ULTIMATE ECU products also carry a Lifetime Warranty for the original purchaser.

Quick Start Guides for Gen 3 & Gen 4 LS Plug & Play

For the latest documentation, firmware & software versions, please visit https://www.ampefi.com/downloads/

 

 

 

 

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