Toyota MR2 Message Board - View Single Post - 20V MK1 Engine Swap 20V ST w/ BT AT ECU... S-AFC NEO?

mr220v · 12-26-2008, 01:27 PM

There's a big arguement on club4ag about whether the 20v ecu's adjust past the changes made with a standalone. No real concrete answers of course. I would imagine that the 20v ecu wants to see X voltage out of the o2 sensor. If it doesn't get it, the fuel trim starts to kick in. The only thing is, why would it do it on WOT? And why isn't it more of a problem with other toyota ecu's?

Anyway, for turbo setups, I've considered other alternatives.

I've often wondered if a 3sgte ecu couldn't be made to work? A gen3 3sgte ecu would be best and would require only a few additional sensors. Then there's the gen3 3sgte apexi power FC. Probably a very good alternative for the 20v. The 3sgte and 20v cam pickup and sensors are very similar. Making it work with a 20v would be just a matter of repinning the ecu plugs, or constructing an adapter.

12-26-2008, 01:27 PM	#2 (permalink)
mr220v Beams Owners Group Join Date: Mar 2006 Posts: 2,529 Thanks: 13 Thanked 176 Times in 147 Posts iTrader Rating: (11/100% )	There's a big arguement on club4ag about whether the 20v ecu's adjust past the changes made with a standalone. No real concrete answers of course. I would imagine that the 20v ecu wants to see X voltage out of the o2 sensor. If it doesn't get it, the fuel trim starts to kick in. The only thing is, why would it do it on WOT? And why isn't it more of a problem with other toyota ecu's? Anyway, for turbo setups, I've considered other alternatives. I've often wondered if a 3sgte ecu couldn't be made to work? A gen3 3sgte ecu would be best and would require only a few additional sensors. Then there's the gen3 3sgte apexi power FC. Probably a very good alternative for the 20v. The 3sgte and 20v cam pickup and sensors are very similar. Making it work with a 20v would be just a matter of repinning the ecu plugs, or constructing an adapter.