carl_9_9

i have been researching ecus and standalones. and this is what i want. there is only a few questions holding me back.

i have a na s4 and i am turboing it soon. what ecu t2 ecu or s4 ecu. off subject but do i have to use the t2 harness.

i have been reading the stuff in the rtek forum and i am concerned with all the 2.0 problems. if it is fully programmable and if you hesitate at certain rpms. why dont you add or subtract fuel in that rpm range. or if not the way it works why not add or subtract fuel from the whole range. you have a wideband telling you your a/f range.

if i already have retarded my timing manually with the crank angle. will the ecu adjust from that.


i am no tuner at all(just learn from reading and testing). if this makes no sense someone help me please i want to make real safe power.

rogrx7

iTrader: (11)

Before you venture onto the rtek route. I think you should do the t2 swap first. that in its self is a hand full. Once you have your car properly swapped your next step would be to update the t2 ecu and throughly read this section, because all your answers are in this section of the forum.

How much power are you talking about?

carl_9_9

idk, maybe 300 to be safe and a little more.

Minnionator

300 is a bit optimisit unless you are planning on doing a full 1.8 setup with large fuel pump, maybe a IC upgrade and a rebuilt or aftermarket turbo.

300 at the flywheel or crank?

turbo2ltr

iTrader: (1)

+1 on what rogrx7 said. I know everyone has to begin somewhere, but it sounds like you have a lot to learn. Get the T2 swap in and running right, then worry about performance. You'll just cause yourself headaches if you try to do everthing at once.

You'll need the TII ECU, AFM and MAP sensor for the swap. You can't use the NA parts.

The "problems" with the 2.0 have been addressed in 2.1 which was just released yesterday.

The hesitation most people talked about was caused by a problem with Mazda's code under certain driving conditions. All our S4 TII products now include a fix for this.

You'll want to get a wideband o2 sensor before you start tuning with the Rtek or any other engine management system.

The ECU does not know you adjusted timing with the CAS, so if you advanced it 5 deg, then the numbers on the Rtek will be 5 degrees retarded than actual timing.

Minnionator, he's talking stage 2, so the 1.8 setup you mentioned is moot.