Tommy7373

Hello all

I've been doing some research about my 2008 GS 460 I picked up about a month ago and have put a couple thousand miles on, and stumbled upon someone who has successfully replaced the original TCM with one from a 08 IS-F (shifts faster and does rev matching):

This was plug and play, but it got me wondering about an ECU swap from an LS460, since the GS460 is detuned (380hp vs 342hp on the GS) so the LS was just as quick, even though the engine is exactly the same.
I know you can replace the ECU easily if you have the car's master key, jumping pins on the OBD port and waiting 30 mins, and coming back, but the question is would this work between car models?
I've looked at the connectors, harnesses, and pinouts for both cars and they are identical, just the model numbers and the car code is different (there are often multiple ECUs even for the same year, just different revisions).

If anyone has any ideas, or has experience and can give assistance about doing something like this it would be appreciated!

Thanks

mspearl95

Definitely an interesting idea! Aren’t there injection and compression ratio differences between the GS and LS tho?

Tommy7373

No they both are 11.8. The only difference I can find is the AFR, when you're wide open on the GS its like 9:1 instead of a more reasonable 11-12:1

ibidu1

iTrader: (1)

Why not just have a tuner reprogram you ecu to give you a nice tune? Tuners are now able to unlock the lexus ecu's to allow them to tune. Its possible to squeeze more power then the LS with a good tuner and a dyno.

Tommy7373

There's a few reasons why I wanted to do something like this

1) This would be much much cheaper than renting dyno time and getting a tune done. You can get pulled ECUs for a little over $100, compared to around $1000 for a tune and dyno time at a minimum.

2) I wanted to try this because nobody else has before, and I'm willing to experiment some

If you could provide some links of some reputable tuners I could reach out and ask what exactly they do that would be nice.

Thomas

ibidu1

iTrader: (1)

I would contact these guys first about seeing if they offer it for the 460, they are not showing it on their website but pretty sure they will steer you in the right direction
https://www.rr-racing.com/RR-Racing-...ig350tne02.htm

These companys I dont know much about them, but they do offer for the 460

http://powerautoshop.com/performance...rque_for_lexus

https://chippower24.com/obd2-chip-bo...240700172.html