esoteric88

Can someone please shed some light on the topic of EMU's for tuning?

I would like to run a simple sri, exhaust, + tune setup. Is it needed to upgrade/change the EMU? If so, which would be best? which is ideal? which get's the job done for cheap?...for now

Thank you!

mitsuguy

iTrader: (2)

There are two options:

1) use a piggy back setup like MAP ECU, Emanage, etc.
pros: inexpensive
cons: everything else - newer ECU's are constantly learning and when you try to tune it a little leaner or richer than the factory ECU wants to run, the factory ECU manipulates the signals itself and detunes it... very annoying and very limiting... even tuned with a wideband and it would run great for a short period of time, then all of a sudden, bam, factory ECU changes the tuning however it wants and car runs like crap until it is all reset... there are ways around this, but none are proper...

2) Use an aftermarket standalone ECU such as an AEM EMS
pros: complete tunability, no stock limitations
cons: price, on an IS, they require special wiring and the factory ECU has to be retained to run the throttle and auto trans if its an auto car... (I can help with wiring diagrams and a basemap for the IS's)...

The factory ECU will do a great job of adjusting fuel for the increased airflow, but more power can be had by more advanced tuning...

esoteric88

gotcha, so i'll spend the extra $$. thank you!!

esoteric88

http://www.andysautosport.com/lexus/...anagement/aem/

is this what i should be looking for?

esoteric88

http://www.andysautosport.com/lexus/...nce_chips/aem/

or these? I'm unsure of the difference :/

mitsuguy

iTrader: (2)

Unfortunately not... What you want is the AEM EMS...

http://www.aemelectronics.com/engine...ent-system-30/

Unfortunately, there isn't one for the IS300...

That being said, I documented how to make one work on an IS300: https://www.clublexus.com/forums/per...play-what.html

esoteric88

ooo that's a bit pricier than I expected. Looks like I'll save up. thank you!

Bezik777

End of the day a waste of money vs gains ...
Been there done that

esoteric88

Why so? It would be fun while I save up for boost