How would a bad N75 valve affect requested boost?
10-30-2006, 11:25 AM
#11
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It spikes to ~19 PSI and tapers to requested curve (16-17 PSI). Above log was taken with TCD/MBC....
thus I left out the actual so as to not create confusion (requested doesn't change with or without TCD/MBC). Tonight, I'll get a MBCless/TCDless log with N75 in place. The MBC/TCD only went in for 1 night of testing, but I suggested removing to trouble shoot why the boost curves are this way.
10-30-2006, 11:31 AM
#13
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I've seen enough GIAC K03 and GIAC K04 logs with/without TCD to know better. Maybe other tuners...
do it differently. The actual boost with N75 on this AWE stage 3 car would perfectly support the idea that his requested boost doesn't change, just a quick spike and then taper to requested curve.
10-30-2006, 11:36 AM
#14
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In all likelyhood I wouldn't expect a TCD to change requested boost at the level it clamps at.
But I just want to make it clear that the MAP sensor is used as an input by the ECU so affecting its signal could potentially alter the ECU's output.
-Dave Pramanik
-Dave Pramanik
10-30-2006, 11:42 AM
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I hear ya. Are you allowed to share what you've learned at EPL about the innerworkings of our ECUs?
I'm sure I speak for many when I say we'd love to hear anything you're willing to share.
