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LS swap tools

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Filter every LS/LT by size, block, AFM and power; see which vehicles to pull it from.

Filter 186 cams by engine, lift, duration, idle and price, with owner dyno results.

Injector size and pump flow for your power, fuel (gas/E85) and boost.

Find a GM pan by sump position and the depth you can clear.

Identify your accessory drive and what water pump and brackets match.

Build a realistic budget: engine, trans, parts, wiring, fuel and labor.

Will it fit? LS vs Coyote, 2JZ, SBC and more by the numbers.

What does my tune need? Engine, computer, transmission and mods in; a plain-English checklist out.

Which GM computer is this? Service number, OS ID, connectors or donor in; family, reluctor, throttle and trans control out.

Printable one-page checklist of everything to check before you crank a swapped LS.

Engine, computer, throttle and transmission in; the minimum wiring to start it and what it needs to run right out.

Relay wiring for the fuel pump and electric fans on a 0411, P59 or E38: pins, terminals 30/85/86/87, prime.

The codes LS swaps set: what each means, the swap causes to check first, and whether it can be turned off.

Wire gauge by amps and length, fuse and relay sizes for pumps, fans and the computer, relay pins 30/85/86/87/87a.