Am I right in thinking a 3.1" pulley can be added to an S260 without further mapping required?
I had a 3" on mine without mapping… but when I put in 550 injectors, the engine came alive! Also without mapping…
I have 3.1" on mine no mapping required. Wonder what difference 3" would make…
it would be brave to do it without testing, on normal driving up to when the map goes closed loop, the ECU can cope, closed loop means there is no optimisation of the map. If the tune is lean you risk the engine.
Stick on the pulley and get it dynoed
The other way around.
Closed loop low down. Open loop at the top.
I have a 3.0 on mine and a remap was certainly needed.
I did not notice anything but the afr on the dyno said otherwise.
The Lotus 270 / GT4 ecu uses a 3.1" pulley amongst other bits and pieces.
To me, this would suggest the 260 Ecu is out of its depth with a 3.1" pulley - whilst being rinsed on a track at least.
doh, always get those mixed up LOL
A 2.8 with 550cc injectors and 260 software just works !
Just be aware that your clutch and gearbox won’t !