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Got Boost?
Join Date: Apr 2001
Location: San Juan, Puerto Rico
Posts: 373
Parts sourcing for prototype update, today I went out to a couple of Junk/Salvage Yards thinking they would be begging to get rid of CIS devices. Even went to an old friend from back when I was hot rodding watercooled VWs, he now owns a great Water Cooled VW Service Center and told me the CIS systems are scarce. Turns out nobody has them, this was a complete surprise, specially when just about every european car from the 70s and 80s had such a system on them, but not a show stopper, I will try ebay, if not then the Carrera 3.0 will have to become the prototype and test environment.

On another note, based on research, a regular stepper motor will not give us the resolution and speed that we need for accurate control so I am looking for the right servo motor and driver combination. I was also thinking of an intermediate prototype phase just to test the ability of the servo to control the plunger by controlling it with a MAF and an intermediate signal conditioner in between. The reason behind this, the plunger is controlled by an air meter, a very archaic by today's standards, but that's what it is. So I am thinking of a Fly by wire Plunger Controller by reading Mass Air Flow from a MAF sensor and not having to touch the rest of the cars setup. It would be a stand alone solution.

911st, WinRice and the rest of the crowd, keep up with the conversations your having, they will become very helpful soon.
"The only motivation to make you go race after race, travel after travel, is winning. The possibility that you have for winning. If you don't have that, nothing else can make you work."
-Ayrton Senna-
Old 09-25-2010, 09:50 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #298 (permalink)