Ian C Posted May 17, 2007 Share Posted May 17, 2007 I looked at those two datalogs you recently spent, it's just as wierd. It spat out more duration at one point than you get on a BPU FCD'd car! At 5000rpm you hit 1.27bar of boost. This clipped the stock pressure sensor at 4.9v, but with the E-Manage's airflow signal change, it sent a signal of 3.53v to the stock ECU. This equates to 0.48bar of boost. The stock ECU responded to this and sent 17.7ms of duration! Which is an insane amount for half a bar of boost... On the mapping day under the same conditions it sent out 16.1ms. Again we've got an extra 1.5ish ms across the board Thing is it the stock ECU is sending out that much signal it can't be because it thinks the boost pressure is high enough to warrant it, otherwise it'd kick in fuel cut. So there is an additional table coming into play surely, like the ones listed by Bondango. Cold start, or accel pump, or something... -Ian Quote Link to comment Share on other sites More sharing options...
Ian C Posted May 17, 2007 Share Posted May 17, 2007 Actually Smarty, can you fiddle a channel on the boost controller to run as low a boost pressure as possible, and see what the results are? Log a run at something between 0.8 and 1.1bar, wherever you can get it to, and then log a run on the other channel that you've been using all along. -Ian Quote Link to comment Share on other sites More sharing options...
Steve Posted May 17, 2007 Author Share Posted May 17, 2007 Actually Smarty, can you fiddle a channel on the boost controller to run as low a boost pressure as possible, and see what the results are? Log a run at something between 0.8 and 1.1bar, wherever you can get it to, and then log a run on the other channel that you've been using all along. -Ian Will try and ahve a go at the weekend and see how low i can get the boost. Quote Link to comment Share on other sites More sharing options...
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