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First LS swap pcm questions

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Old Oct 22, 2020 | 04:52 AM
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Default First LS swap pcm questions
I'm going to attempt to put an LY6 in a 1964 Galaxie 500 xl and was wondering if I can just use motor, transmission, pcm, and harness. After doing some reading I'm starting to understand it's not that simple , I have to reprogram the pcm ??? And will the stock pcm support extra HP. Things like cam , injectors, and down the road a turbo. Thanks.
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Old Oct 22, 2020 | 04:55 AM
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Oh , and I do plan to use the 6L90 transmission. The mechanical part of this whole thing doesn't bother me , just the electrical.
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Old Oct 22, 2020 | 09:06 AM
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Your going to have to get the ecm/tcm reprogrammed for the swap and also for anything else you change that effects air flow or fuel like injectors, camshaft, headers, stall etc. You can get a base tune through mail order that would get it running BUT with what the mods your wanting to do it will need to be fine tuned in person or remotely but that would require you to purchase tuning software, laptop and a wideband.
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Old Oct 22, 2020 | 10:31 AM
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Ok , thank you. I may try and find someone local that does that.
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Old Oct 22, 2020 | 10:33 AM
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Or would it just be simpler to purchase a computer from Holley or something like that ?
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Old Oct 22, 2020 | 10:47 AM
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No aftermarket controllers including Holley support the 6L90 YET.
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Old Oct 22, 2020 | 10:56 AM
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Oh realy , so my only option to run that transmission is to do.it stock ?
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Old Oct 22, 2020 | 10:59 AM
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Have you given any consideration to a 'turn key' swap? I just spent over 5 figures for a built TSP 370 + Performabuilt 4l60e into my fbody.

When you piecemeal the swap all the big and little things add up in a hurry especially when considering a hybrid swap such as yours.

Just one example in link below. There are many out there to choose from.

https://gmauthority.com/blog/2020/08...-by-speartech/

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Old Oct 22, 2020 | 11:44 AM
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Ya.....I'm thinking more that way now. Thanks for the link.
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Old Oct 22, 2020 | 03:43 PM
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Check with Vintage Air for parts to mate your AC or GM AC compressor and condenser parts, hoses, fitting etc. I'm sure you want to cruise cool.

https://www.vintageair.com/

Racetronix and/or others for parts for the electric fuel pump necessary to supply 58 PSI at the rail for the fuel injectors on LSX engines packages.

https://racetronix.com/
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Old Oct 22, 2020 | 04:02 PM
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Thanks very much for that info.
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