| [ Total Views: 1091 | Total Replies: 10 | Thread Id: 113858 ] |
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 MR930
Wolfsburg Wizard
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| posted on October 10th, 2020 at 04:24 PM |
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Webers-need fuel pressure regulator?
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?
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grumble
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| posted on October 10th, 2020 at 06:23 PM |
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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.
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 barls
A.k.a.: Mr indestructible
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| posted on October 10th, 2020 at 10:08 PM |
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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.
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 Bizarre
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| posted on October 11th, 2020 at 05:27 PM |
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2.5 - 3.0 lbs
http://www.redlineweber.com/html/application_guide/important_things_to_know.htm
Futue te ipsum!!!
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Bizarre
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| posted on October 11th, 2020 at 05:31 PM |
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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
Futue te ipsum!!!
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MR930
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| posted on October 12th, 2020 at 04:53 AM |
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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.
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Bizarre
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| posted on October 12th, 2020 at 07:37 AM |
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What sieve motor.? Cam?
I have never seen 44
Futue te ipsum!!!
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hellbugged
A.k.a.: Daimo Pell
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| posted on October 13th, 2020 at 05:32 AM |
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Poor sync?
Blocked idle jets?
Blocked airs?
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HS618
Officially Full-On Dubber
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| posted on October 13th, 2020 at 04:57 PM |
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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.
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vassy66T1
A.k.a.: Marcus Vass
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| posted on October 14th, 2020 at 09:05 AM |
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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
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MR930
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| posted on October 16th, 2020 at 05:16 PM |
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Seems it was just linkages not adjusted right. I trusted my son had done it right.
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