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Engine basics => Engine set up tips => Topic started by: frank mccune on April 10, 2016, 03:40:53 PM

Title: Where to find 4-40 pressure taps?
Post by: frank mccune on April 10, 2016, 03:40:53 PM

    Hi All:

    Where may I purchase some of these things?

                                                               Tia,

                                                               Frank McCune

Title: Re: Where to find 4-40 pressure taps?
Post by: Dane Martin on April 10, 2016, 04:44:33 PM

http://www.radicalrc.com/item/Bolt-On-Pressure-Fitting-4-40-by-Fox-105485

Fox made them, but I'm pretty sure k&b used that size. Check out mecoa.com also

Title: Re: Where to find 4-40 pressure taps?
Post by: Balsa Butcher on April 11, 2016, 09:01:02 PM

Fox 4/40 pressure taps are getting hard to find but the 6/32 Dubro ones are available and work fine. If one is concerned about the opening being too large, (it's not) however if it is, a restrictor can be put in the system. One way to make one is to fill up a short length of 1/8" brass tube with solder. JB Weld will also work. Drill a small hole in the center. Shove it into the line connecting the pressure tap to the uniflow outlet. Easy, adjustable, and removable.  8)