S4 actuators and VDI question.
04-24-12, 10:09 PM
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S4 actuators and VDI question.
I recently got a engine for an 86 shell that I have had for a few years. Got the engine in and it runs fine, however I do not have exhaust yet and will not be running a stock system. I have removed the ACV and want to use the stock air pump to run the actuators, I have seen how many of you are running them my question is where/what is the VDI?
04-24-12, 11:03 PM
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VDI is an S5 NA feature. An S4 NA engine only has the 6PI system, which is the 2 actuators on the lower intake manifold.
This is how I controlled my 6PI system with w/ an RPM switch (and later the VDI when I converted to S5 manifolds): https://www.rx7club.com/2nd-generation-specific-1986-1992-17/activating-aux-ports-vdi-rpm-switches-907824/
Images of the S5 manifold here: http://homepage.mac.com/carldavis/intake.html
This is how I controlled my 6PI system with w/ an RPM switch (and later the VDI when I converted to S5 manifolds): https://www.rx7club.com/2nd-generation-specific-1986-1992-17/activating-aux-ports-vdi-rpm-switches-907824/
Images of the S5 manifold here: http://homepage.mac.com/carldavis/intake.html
04-25-12, 11:06 PM
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Thank you! yeah I was searching around and saw how you did it.... wasn't sure what the VDI was. this is very helpful I am working on a set-up like yours should have it finalized by the weekend. Thanks again!
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