Mike Wills came up with this cute place to mount a
    fuel pressure gage. Helps when setting the fuel pressure
    or trouble shooting things when it won't start.
    These small gages are available from McMaster Carr.

    Dave, can you send me all correspondence with Mike
    as he was installing the engine. It will help
    me understand why he did certain things in a particular
    way.

 Paul Lamar

 No Bourdon tube gages for fuel. Put an electric sender in that position
 and a switch beside it to switch between the inside electric gage and
 one under the cowl. If you just have to use a Bourdon gage you can
 put an isolator in front of it and run it on antifreeze. Bourdon
 tubes eventually split open and spray fuel all over hell. Lynn E. Hanover

 What is it about fuel pressure that causes them to split?
 Say.... as opposed to steam?

 Paul Lamar

 The pulsations. Gages specifically designed for fuel pressure or
 other forms of pulsation have chokes with .010" holes to damp the
 speed of pressure changes that can affect the tube. The tube is very
 thin wall brass sheet formed into a tube and soldered. Then rolled
 flat and wound into a coil.

 Even those designed for fuel pressure fail with alarming regularity.
 My racer came coasting into the pits one day with the window net
 down and the drive holding his hand out trying to get some air into
 the cabin.

 The fuel pressure gage had failed and hosed down the interior and the
 driver. We were very lucky. I sent it back to Autometer but never heard
 a word back. I bought an isolator to put right beside the carb, and ran
 the new gage on antifreeze. Then you can use 1/8" Nylon sender hose
 instead of braided stainless.

 Lynn E. Hanover

 Does this apply to the  glycerin filled industrial versions that damp
 pulsations? Mike's is 1 1/2 inch SS glycerin filled.

 Autometer has a 15 psi for $22 and a $44 100 psi obviously for fuel
 injection.

 The $22 15 psi is used for carbs with a solenoid pulsations pump
 and the $44 100 psi is used with a centrifugal pump. I suspect the
 centrifugal pump is much smoother.

 I do not think either Autometer one is glycerin filled.

 Where do you get the isolaters?

 Paul Lamar

 I would think that the liquid filled gages would last longer, but you
 might be over the Rockies at night when "longer" runs out.
 Isolators are available at:

 http://www.jegs.com/i/Mallory/650/29806/10002/-1?parentProductId=752902

 Or http://www.autometer.com/cat_accessorieslist.aspx?pid=39

 Lynn E. Hanover


That is a much better price than what I was thinking about. Not industrial. I
attach a Wika gauge seal file for reference.

Dale Davies