monsween Posted July 9, 2009 Share Posted July 9, 2009 Quick question really. Is 11.7 too lean for WOT 2/3rd gear at 1.1-2bar Around 14.7-8 for generic driving Cheers Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted July 9, 2009 Share Posted July 9, 2009 Quick question really. Is 11.7 too lean for WOT 2/3rd gear at 1.1-2bar Around 14.7-8 for generic driving Cheers Yes! is this a singe we are talking about? and what is the ECU? 11. 2-4 would be best, and 11.0 if you're uncertain of the map. Quote Link to comment Share on other sites More sharing options...
monsween Posted July 9, 2009 Author Share Posted July 9, 2009 BPU 6 speed running 1.15-2 bar Stock ECU Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted July 9, 2009 Share Posted July 9, 2009 BPU 6 speed running 1.15-2 bar Stock ECU Unusual for the stock ECU to run things so Lean, are you sure the AFR gauge is correct, you would normally see anything from 9.5 to 10.9 as they run pretty rich. Quote Link to comment Share on other sites More sharing options...
monsween Posted July 9, 2009 Author Share Posted July 9, 2009 The AFR gauge came from Dude so im pretty confident it'll be right. So whats this mean, check the sensors? or timefor a new ECU? Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted July 9, 2009 Share Posted July 9, 2009 Most AFR gauges need to be calibrated or they can read wrong, my LM-1 does every so often, what make is yours? Can't think of anything that would make it run lean, other than the MAP sensor at WOT as its just using a preset map, any sensor failure's/problems and it will just run pig rich by default. Quote Link to comment Share on other sites More sharing options...
monsween Posted July 10, 2009 Author Share Posted July 10, 2009 How do they get calibrated? Quote Link to comment Share on other sites More sharing options...
csa Posted July 10, 2009 Share Posted July 10, 2009 fueling problem maybe? have you got one or 2 pumps? Quote Link to comment Share on other sites More sharing options...
wkdtime Posted July 10, 2009 Share Posted July 10, 2009 fueling problem maybe? have you got one or 2 pumps? Two pumps on BPU? Im sure he's running just one pump, more to the point has the old unit been changed for an uprated one since going BPU? Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted July 10, 2009 Share Posted July 10, 2009 One thing i forgot, fuel pressure regulator will also cause that problem if its gone faulty. Quote Link to comment Share on other sites More sharing options...
Guest Supra2 Posted July 10, 2009 Share Posted July 10, 2009 Yes! is this a singe we are talking about? and what is the ECU? 11. 2-4 would be best, and 11.0 if you're uncertain of the map. thats a very incorrect statement on your part. you cant just say "yes" or "no" without the facts in front of you like ignition timing data, air temps, egt's etc etc, many variable conditions would dictate what a/f ratio should be applied at any given state. but seen as its an oem ecu it seems a little lean for the "norm". Most AFR gauges need to be calibrated or they can read wrong, my LM-1 does every so often, what make is yours? Can't think of anything that would make it run lean, other than the MAP sensor at WOT as its just using a preset map, any sensor failure's/problems and it will just run pig rich by default. all a/f ratio gauges are self calibrating and dont need calibrating. the only time they do need calibrating is when you are trying to sync the data on the gauge to a standalone ecu logging parameter. Unusual for the stock ECU to run things so Lean, are you sure the AFR gauge is correct, you would normally see anything from 9.5 to 10.9 as they run pretty rich. very true point. if you are running a FCD then it might be setup wrong, some FCD units allow the alter the signal very slightly and this effects the fueling applied the map at a certain boost level. but like Tricky Ricky said, could be FPR, a faulty map sensor would make the car run rich, no? clogged fuel filter? i'd hook up a knock amp and a another a/f ratio meter in the exhaust and check there is no knocking/pinging/detonation during those WOT conditions. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted July 10, 2009 Share Posted July 10, 2009 thats a very incorrect statement on your part. you cant just say "yes" or "no" without the facts in front of you like ignition timing data, air temps, egt's etc etc, many variable conditions would dictate what a/f ratio should be applied at any given state. but seen as its an oem ecu it seems a little lean for the "norm". He asked a simple quick question, if 11.7 was too lean for WOT 2/3rd gear at 1.1-2bar and IMO it is! So my answer was Yes. as most people won't understand a highly detailed set of whys and wherefores as they don't do there own mapping. all a/f ratio gauges are self calibrating and dont need calibrating. the only time they do need calibrating is when you are trying to sync the data on the gauge to a standalone ecu logging parameter. Incorrect as several true wide band AFR gauges need periodic calibration to be completely accurate, including the Innovate LM-1 , we are talking aftermarket here, not std wideband lambdas that ate used in some more modern cars, and ARE automatically re calibrated by the ECU. very true point. if you are running a FCD then it might be setup wrong, some FCD units allow the alter the signal very slightly and this effects the fueling applied the map at a certain boost level. but like Tricky Ricky said, could be FPR, a faulty map sensor would make the car run rich, no? clogged fuel filter? i'd hook up a knock amp and a another a/f ratio meter in the exhaust and check there is no knocking/pinging/detonation during those WOT conditions. Another cause could be a sticky injector, which if not flowing enough, will cause the overall AFR reading to be lean. Quote Link to comment Share on other sites More sharing options...
monsween Posted July 10, 2009 Author Share Posted July 10, 2009 So throw it into a garage that know what they are doing then? Quote Link to comment Share on other sites More sharing options...
Ian C Posted July 10, 2009 Share Posted July 10, 2009 Personally I'd be OK with 11.7 on a stock setup, except that a stock setup shouldn't be fuelling like that as pointed out already. So while it's not exactly going to det itself to death suddenly, there is a problem somewhere - be it in the measurement of the mix or the mix itself. Oh and Innovate widebands need a "free air" calibration if I recall correctly. -Ian Quote Link to comment Share on other sites More sharing options...
monsween Posted July 11, 2009 Author Share Posted July 11, 2009 Thanks lads. Maybe need to think about an aftermaket ECU in the future Quote Link to comment Share on other sites More sharing options...
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