Absolutely! Basic Fluid dynamics, if you open the aperture wider (smaller to
larger fuel hose), pressure drops. The relationship is inverse to pi-r-squared
(area or opening), in square inches (or square mm, whichever you measure). I
think the pressure at the carbs (on my SU's) has to be about 4psi. (3-6psi
range, off the top of my head, but according to the manual) I recently put a
manual pressure regulator on them to ensure I wasnt over-pressuring the float
bowls a higher RPM's.
BTW, you'll also get a minor (but probably imperceptible) drop across the fuel
filter.
Perry Smith
'68 2000
"Brucciani, Chris" <CBrucciani@archinsurance.com> wrote:
Thanks to fellow listers Pinky's electrical gremlin has been calmed (for now).
I have a hunch that I may be lacking fuel pressure at the carbs. I have an
electric fuel pump located on the frame. It feeds into an inline gas filter -
out to about a 5/8" fuel line - into another inline filter (I need to remove
this but before I changed the hard fuel lines and coated the gas tank I had a
lot of rust) then into a =" or so fuel line to the carbs. It doesn't appear
that I get good flow to the second filter. Would a too large fuel hose
contribute to a lack of fuel pressure?
Chris Brucciani
Marietta, GA
1968 2000 "Pinky"
1973 240Z
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