For all the SD-VE-MAF doubters out there...
04-22-2005, 07:29 AM
#21
FormerVendor
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Originally Posted by jimmyblue
Has anyone yet played with the idea of a pulse
damper for the MAP sensor, to keep manifold
pulsation from kicking it around? Be interesting
to put a 'scope to the MAP sensor output and
see just how badly the value is jumping (to be
caught at various points by PCM sampling).
damper for the MAP sensor, to keep manifold
pulsation from kicking it around? Be interesting
to put a 'scope to the MAP sensor output and
see just how badly the value is jumping (to be
caught at various points by PCM sampling).
We ended up implementing a full TPS vs RPM modifier for the VE table and it is working quite successfully on big cammed 8 TB cars (the kind of engines that idle at 70kPa and then pull 95kPa at 5% TPS - not leaving you much resolution). The TPS thing seems to work well, i dunno what you would call it but it's a mix of SD and TPS. It will be part of our "SD Enhanced" package when it is released.
04-22-2005, 07:44 AM
#22
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Originally Posted by God Forgives I Dont
So TxHorns281 what method did you end up using to calibrate your MAF table? Did you make use of any of the MAF calculating spread sheets out there or did you do it by hand / educated guessing?
So if your results hold up, then that means all we have to do is get it real close on VE then all in one day finalize the VE and calibrate the MAF and sense the MAF is always primary (most of the time) the tune should not really need any further adjustments until we modify something in the air track that would require recalibration of the MAF?
So if your results hold up, then that means all we have to do is get it real close on VE then all in one day finalize the VE and calibrate the MAF and sense the MAF is always primary (most of the time) the tune should not really need any further adjustments until we modify something in the air track that would require recalibration of the MAF?
As far as the MAF calculators, I don't know what's out there right now but I think I came up with the original spreadsheet....
Gawd if you could only see it now... redhardsupra made a real nice rendition out of my original not too long ago. I like the layout of his much better... lol Thank you Excel junkies!!!! 
04-22-2005, 11:40 AM
#23
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Yes that's spread sheet I have currently ( I think anyway). Its the one the does the RAF and MAF? I can't seem to get the RAF part to work out right and I've tried a couple of times. Thanks for the info though I'm going to keep at it and I'm sure I'll get the MAF calibrated just have to do it quickly so the VE doesn't change due to weather in the middle of calibration tuning.
When you get a chance, hit me with a PM about what youve been working on, have a car or two that might benefit. What map reading do those setups see cruising? 70kpa, thats GOOD idle vacuum 