Originally, I thought that the gen 4 3SGE had 200hp for the M/T car, with max torque higher up, and the auto version had 10hp less, but made max torque at a lower RPM (courtesy of revised cams/head design etc?)
As the auto is less likely to be lingering in the higher rpms, and the longer gears of the auto box could use a bit more torque than high end power.
This is exactly what happens with the Altezzas, as below:
3S-GE 200@7000 159@4800 (Auto5spd)
3S-GE 210@7600 159@6400 (manual)
As you can see, the manual version and auto make identical torque figures, at different RPMs to suit the transmission.
I also have confirmation that the head designs are different, different valves, different cams.
So I assumed that this was also the case with the FWD beams engine too, as it again makes 10hp less when fitted to an auto box.
However, the figures seem strange:
3S-GE 190@7000 152@6000 (auto)
3S-GE 200@7000 152@6000 (manual)
As you can see, they both make the same torque at the same RPM, yet the auto version makes 10hp less.
Is this likely to be a physical difference in the engine, or is it perhaps detuned with the computer etc?
I was thinking (hoping
) That the auto ECU pulls back the timing/fuel at high RPM, as perhaps the auto box is intolerant of high rpms.
Bearing in mind that these engines use a different gearbox to the altezzas, as they are a 4 speed transaxle.
If this is indeed the case, then changing to the M/T ECU should gain you back the 10hp that you didnt get.
So that's a pretty easy 10hp, assuming it is true, and you can find an M/T ECU for one.
Do any other toyotas do the same thing perhaps?
Or are there likely to be physical differences between the engines?
*crosses fingers for detuning*
