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Aftermarket Cruise Control on an 87 RX turbo


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I want to put cruise control on my 87 RX turbo but I have heard that turbo manifold vacuum turns into positive pressure when the turbo kicks in and makes it unusable for most cruise control units.

 

Now the questions is......how can I do it? I am not very knowlegeable about the inner workings vacuum on the RX but I thought there was a small vacuum pump under the hood near the passenger side strut tower......if that is the case can this be used to run an aftermarket cruise control?

 

And does the 87 RX use a vacuum assisted brake booster?

 

Hopefully this makes sense to someone because I claim total ignorance on this subject.

 

Thanks,

Gregg

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I did find an EA82 Turbo Wagon GL in the junkyard that has cruise control. (not sure if its factory or dealer installed) Would this vehicle also have a separate vacuum source for the vacuum pump? Or did it just tap into the vacuum pump above the passenger strut tower? My turbo RX has the same vacuum pump (above the pass strut tower) as the turbo wagon in the junkyard.

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