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JFairman JFairman is offline
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Join Date: Jul 2006
Location: S. Florida
Posts: 7,289
I don't think your WUR is reducing warm CP under light throttle. Steady warm CP is probably low enough now to let intake airflow push the airflow metering plate down while raising the control plunger upwards against it displacing it a little faster than fuel is replenished through the small orifice leading to the control pressure chamber above the control plunger. That seems like a good thing that would improve throttle response at low speeds.

If you want to try making your WUR's warm steady cruise CP adjustable you'll have to experiment a little and start by removing the approximately dime sized gold cad plated steel cover pressed into the bottom.

I sent mine to Brian Leask to be made adjustable so he did all that. I've never removed the steel bottom cover so I don't know if what you'll find under there is the same adjustments you see on one Brian has worked on and made adjustable.

You could post that question on the engine rebuild forum and maybe one of the experts over there knows and will reply, or maybe they don't want to say what they do or is done by others.

Either way that steel cover has to come out.
Maybe they drill a hole in it and use a slide hammer or thread a self tapping screw into the hole they drilled and pry it out from the bottom while the WUR is clamped in a bench vise or maybe all the insides are removed and they press it out from the inside.

I'd like to know and I wonder if thats all it takes to expose the boost and steady cruise adjustments - if they are already there and factory set to CP specs for the year and model car it's going on and then covered up with the pressed in steel cover to make them tamper proof.
I'm just guessing at that and I don't know.
Not that I want to get into modifying them.. I'm just curious.

For the boost threshold adjustments he drills and taps 3 holes and installs 3 stainless allen head grub screws in a triangle around the boost CP adjustment with a touch of low yield loctite to keep them snug. When they are turned inwards they push the largest diameter internal spring upwards pushing against the CP fuel return line metering disc under the return line orifice.
Old 07-02-2011, 08:20 AM
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