Build your own adjustable fuel pressure regulator ;)

[oldeskewltoy]

from another forum Wrote:Nice write up, but that looks like ass (no offense). Have you pressure tested it? What's the pressure threshold before it starts to leak?

maybe this photo better shows...


It NEVER leaks**... the small rubber seal is not the diaphram to seal out fuel, but to make a vacuum seal. The diaphram is still intact, and it is part of the reason to not cut too deeply. All you are doing by removing the top is removing the set height for the spring pressure. The spring rests on a steel cup attached to the diaphram.


** obviously if you have a leaking FPR before, it will still leak after.