Quote:
Originally Posted by stelan
Original 2.5 and 2.7 AOS drains thru small opening in the block that proved to be a design issue as it does not drain fast enough under certain conditions, this small opening is not used in the stelan AOS as it drains thru the larger intake at the bottom of the manifold. that is why the small opening gets blocked by the plug.
On the 3.2. 99610702601 (later larger drain AOS) I will have the manifold drain thru both larger intake and original larger drain locations for even better oil return as the larger displacement is more demanding. the R&D I have is to do is to make sure system volume is appropriate for fuel trims, etc.
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Fuel trim is the hardest part, and the most important.
This is the thing that has blocked 100% of my attempts to do this for the past decade. Things like deceleration recovery, and extended WOT operation are where the things get hairy the fastest, and this is when the volume of the unit and engine displacement, and output will come into play.
Issues driving down the road normally can be experienced too, and remember, long term fuel trim values can take hundreds of miles to show an issue. This is what takes so much time, since every change to the unit/ design/ etc takes days of driving to actually compare.... A stand alone data logger with a 2 channel manometer is the best tool for this job, so you can plot the vacuum changes in inches of water values. Overlaying that data with fuel trim plots gathered at the same time, and MAF signal can help see the real story of the changes that you made.
The other road block that we've had is far from that of a developmental hiccup, as the AOS is an emissions component, and it's pretty easy to get in trouble when bringing something to market that's considered an emissions related item. I have two products developed for ''tis very issue at the present, but we can't sell them without a large amount of liability and risk.
Maybe these things help stimulate thought on your end.