Yeha were back on line.

Anyway, just read on the net somewhere that a chap had changed the 'fuel pressure regulator' on his Octy RS. Apparently the performance was increased and the fuel econ was the same. Does anyone know an advantages of this, or is it a load of cack :confused:

Cheers

Si

The only knowledge I have on this is that if you have revo software then you can get a 4 bar fpr upgrade

http://www.revotechnik.com/revo/revo/uk/ukrevo.html

(click on products/skoda and look at the asterisk)

I really don't know what changing the fpr on a standard car would do (can't imagine it would be very healthy :eek: ), or what Jabba or APRs views on them are.

Not much help really

The engine management system should be reading the lambda sensor to check for complete fuel burning hence the correct air/fuel ratio.

Whilst it's possible that you could go out of the injection limits of the ECU by fiddling too much with the fuel pressure (which would probably be a "Bad Thing"[tm] as I'd imagine you'd have to go quite a way) I'd think that in most cases the ECU would back off the injector duty cycle (seeing as the amount of incoming air would be the same) until the correct burn was achieved.

Just IMO like ...

Edit: Re the Revo 4Bar thing .. if you push the turbo boost pressure up too much then the injectors can't push enough fuel into the engine for the air mass that's flowing in ... in that case more fuel pressure and/or meatier injectors is needed to get enough petrol in there. Still shouldn't make a difference on all but the heaviest-boosted cars though should it, probably with bigger turbos?

:hihi:

which would probably be a "Bad Thing"[tm]

funny

Edit: Re the Revo 4Bar thing .. if you push the turbo boost pressure up too much then the injectors can't push enough fuel into the engine for the air mass that's flowing in ... in that case more fuel pressure and/or meatier injectors is needed to get enough petrol in there. Still shouldn't make a difference on all but the heaviest-boosted cars though should it, probably with bigger turbos?

Apparently, the standard injectors are already pretty close to their maximum output with the standard K03 "sport" turbo running at full chat. AIUI they need the fuel pressure to be increased from the standard 3 BAR to 4 BAR just to keep enough fuel flowing with an upgraded turbo.