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>Okay, I just pulled out my "Without Guesswork" and looked up the fuel >pressure. It verified that the MAX pressure for the type 3 is 5 psi >and the MAX pressure for type 1/2 is 3.5 psi. The minimun delivery >capacity is the same for the two, but the footnote is interesting: >Did you know that the type 3 carb uses a different float valve? It is >actually SMALLER in diameter! The T1/2 float valve is 1.5mm dia while >the T3 is 1.2mm. If I take the ratio of 1.5/1.2, then square it to >get the ratio of the areas, then I have approximately the ratio of 5 >to 3.5. > >So it seems that if you needed to go with a type 1 fuel pump (at >3.5psi), It might be a good idea to go with type 1 float valves. Do >they interchange? > >Jim Did you look up the specs for a T3 with a single carb or a T3 with dual carbs? It would seem that dual carbs would account for the difference. Less fuel flow per carb because it is only feeding two cylinders. Just a thought. Scott ___________________________________________________________________ Get the Internet just the way you want it. Free software, free e-mail, and free Internet access for a month! Try Juno Web: http://dl.www.juno.com/dynoget/tagj. ------------------------------------------------------------------- Unsubscribe? mailto:type3-request@vwtype3.org, Subject: unsubscribe