difference between a 3310 and 4779 primary metering blocks.

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rfoll
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difference between a 3310 and 4779 primary metering blocks.

Post by rfoll »

I would think they would be interchangeable, but my research says otherwise. What's the diff? The venturi sizes are the same.
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1980RS
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Re: difference between a 3310 and 4779 primary metering blocks.

Post by 1980RS »

rfoll wrote: Fri Jun 11, 2021 7:53 pm I would think they would be interchangeable, but my research says otherwise. What's the diff? The venturi sizes are the same.
I have used them on both the 3310 and 4779 and interchange them all the time with no problems. The sec ventui's on the early 3310's are bigger until the -4 or -5 then they measured the same.
ozyfordman
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Re: difference between a 3310 and 4779 primary metering blocks.

Post by ozyfordman »

I can’t verify it but I believe that the PVRCs are larger on the vacuum secondary models over the DPs I’m sure I read it in a book long ago.
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jmarkaudio
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Re: difference between a 3310 and 4779 primary metering blocks.

Post by jmarkaudio »

Thread both the idle feeds and PVCR's and it won't matter.
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