I've copied this from what i posted on the modifiers site the other day, hopefully it'll open a few peoples eyes to whats possible and stop them wasting money on stuff they dont need :lol:
MarkTurbo said:Thought i'd start a separate topic about this as its been mentioned quite a bit lately in a few other posts. Hopefully a few other people can add their findings too
Now my car is sorted out after a few niggling problems ive been having lately i thought i'd get the wideband air fuel ratio meter on it and see how far i could push things on the standard ecu I was in a bit of a rush so i've just done it at 1.3 bar for now and i was getting 11.4:1 afr upto 7500 rpm which is still running rich The standard ecu chucks loads of fuel in in the midrange too, i was getting afr's in the 10's! My only fuelling mods are a bosch motorsport pump, im using a totally standard ecu/fuel pressure regulator/injectors/maf etc.
Hopefully this will make good reading for the people that s**t themselves at the thought of running over 1 bar on the standard ecu Obviously you have to get the fuelling checked when upping the boost, i dont want to get the blame for people turning it upto 1.3 bar then blowing their engine up
I've got some software on the way for my laptop that allows you to monitor the ecu, maf voltages/injector duty etc etc so as soon as i get that i'll spend some more time monitoring those and the afr's at different boost levels and post up the results
I'm pretty pleased now my car is sorted, it feels noticeably quicker than when i did the J tuner feature at Bruntingthorpe too
MarkTurbo said:i wired a voltmeter up to the maf pin on the ecu just now and went out for a blast. At 1.3 bar it was going upto 4.35 volts so i've got a bit to play with there as it dosent max out until 5 volts