I've just put a pair of webers on my buggy and it's running horrible. It has the standard fuel pump so I didn't put in a fuel pressure regulator. Could this be my issue?
Both my other cars running webers have a regulator but are running electric pumps. It doesn't appear to be running rich. It's a new engine 1641, runs ok with the revs up but hard to take off. Ideas?
grumble ·
Barls runs a pressure regulator on his 2 litre with twin webers and i know that it ran like s...t with too much pressure, apparently they use a lower pressure but I can't remember the figure, I am sure that he wll let you know what he is running.
barls ·
off the top of my head its 1.5 but i could be wrong. ill have look but probably won't get there before monday as I'm working tomorrow.
I have not seen stock pumps put out greater than 3 lbs
Are they Webers or something else.
What is your jetting?
Mixtures set properly
What is it doing wrong
MR930 ·
Yes 40mm idf webers. I'm going to put a pressure regulator on it. It doesn't seem to be overfueled but it's running like crap down low.
Bizarre ·
What sieve motor.? Cam?
I have never seen 44
hellbugged ·
Poor sync?
Blocked idle jets?
Blocked airs?
HS618 ·
Ive been using a stock VW mechanical pump with my 48 IDA Weber street beetle for over 40 years with no regulator. If the (unlikely) pressure is too great, add a few gaskets under the mechanical pump. Depending on the size of the needle and seat (most common is 2.0mm), a fuel pressure of 2.5 lbs is adequate.
Sounds more like a tuning problem rather than fuel pressure.
vassy66T1 ·
44's on a 1641 are on the larger side. Putting in a smaller venturi (choke) will improve low end response.
Every carb works well if you rev it but it is down low and on transition that is the tuning area
MR930 ·
Seems it was just linkages not adjusted right. I trusted my son had done it right.