Sai Removal And Air Filter Swap

Did this when I had a SprintST about 8 years ago, so hope my memory serves, and should be just as relevant to the S3. Pretty sure only need to do the tick box, no need to re-save map (you can always check by exiting and then reconnect to see it's still unchecked). But equally important I believe you also have to physically block the pipe to the valve. I selected a marble of a suitable size that sealed the pipe between valve and airbox (make sure it's too big to get sucked into the airbox or valve!).
Can't say for sure but would think O2 sensor will cope with filter change.

 

This guy does a 1050. Might be useful.

 

Just so you know, the ECU records how many times the map has been changed (and/or reloaded I assume). So any future owner or technician might be concerned if it showed a high number of changes.
How you go about doing the physical blanking off might depend on how easily you want to revert to standard (eg when selling bike).

 

No worries, AFAIK the ECU doesn't record low level changes such as the SAI tick box, only full map uploads. In any case seeing say 6 map changes on an ECU I would consider normal/acceptable, if it went into double figures I would start to think there's been a problem or somebody's been messing about, perhaps not knowing what they're doing.
So I'd go ahead disabling SAI via TuneECU, just using the tick box, and as you say just block the pipe perhaps as a temporary measure to assess the difference.
I haven't disabled SAI on my S3 as the cat is still present with my twin high Arrows (so it still pops a little), but when I changed the SprintST for decat and TOR can it just left I slight (nice) burble on the overrun. The biggest benefit was it transformed the pickup from a closed throttle - SO much smoother.

 

Hi mate.

I also have twin Arrows on my 08 Speed - anyway to check if cats are present? Worth doing this SAI removal?

 

can someone enlighten me as to what t'SAI valve is, what's it's function, and what t'benefits are to blocking it?

 

Eyup lad it’s a system to inject air into the exhaust to clean up any unburnt fuel and it’s what gives the popping and banging on the overrun when downshifting. You don’t get any extra performance by disabling it, just less/no exhaust “backfires”.

 

It's an emissions thing then?

 

Cheers Yorkie. I'll not bi bothering then, as I love t'popping ont overrun, wit SC Project can.

 

I am thinking of removing the SAI on my 2011 EFI, not for the reason of popping but have been lead to believe my engine will run a bit cooler therefore reducing exhaust bluing, I have a friend who works in a Triumph main dealer who says its good to remove the SAI because the vacuum operated valve that feeds them air quite often leaks making the bike run very lean which is not good.