| So I read this post (link) from a couple of days ago, and a day later while driving (my Z) it suddenly hit me. Why can't this be an underlying factor for all the stalling at speed issues that we see on TT.net? A simple search (link provided for you green 'Ns' out there) for 'stalling' produced >1500 results and after reading through the first 30 or so, I found at least 10 different possible reasons. This is not including the duct tape method for fixing 'stalling noticed after a POP charger install' in the FAQ (FAQ link). Couple this with the fact that I have driven two different Zs, both of them bone stock (stock airbox), and had both stall at speed in 5th gear after pushing the clutch in exiting from the highway. So here is my line of reasoning:
1) Stalling at speed is not inherently caused by the presence (or absence) of a POP style intake. (This is only based on my experience, I haven't done a thorough search yet) 2) A simple search reveals numerous possible causes, and numerous fixes for different individual's stalling at speed issues. 3) A 'consult/nissan datastan' readout (ref earlier link) shows that decelerating in gear lowers the injector duty cycle 'a lot'. And here is the theory:
The 300ZX is inherently more likely to stall at speed, after pushing the clutch in (MT only obviously), due to: 1) The low injector duty cycle programmed into the ECU for in-gear decelerations.
2) Other factors unique to our engine/ECU/etc... that I haven't thought about.
3) The age of our cars (hang with me on this one) - Offhand, I can't think of many vehicles manufactured prior to 1989 that used a hot wire MAF. I also can't find any reference online to when the first hot wire MAF was installed in a production vehicle. So maybe this is a problem inherent in all hot wire MAF vehicles, and we're just the first to notice it.
4) Ultimately, stalling at speed is due to poor electrical connection maintenance, vacuum leaks, poor spark delivery, poor fuel delivery, or any one of a number of other factors. All of which, when corrected, have been documented (again, in search) as fixing someone's stalling problem, but not everyone's...
5) The installation of a POP style intake only magnifies any effect that is already present. To further add turbulence to this discussion, check out the Wikipedia article here that says a hot-wire MAF installation "requires a laminar flow across the hot wire". This would contradict current (AFAIK) thinking on tt.net that the turbulence added by duct tape helps the MAF register correctly on a POP charger style intake. I apologize for the blatantly bad pun in the last paragraph, I will go flog myself. Thoughts anyone?
-Jason p.s. For you newbies out there, this is my first thread started on twinturbo.net - after 5 years and 25000 hits.
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