how low should I go?

[Gundy]

I just bought a fuel pressure regulator for the
40. I'm using an electric pump and I noticed
it was really building pressure on the fuel line.
The regulator adjusts from 2 to 5 1/2 psi.
Should I just start at 2 and see how she goes?
I would think the lowest I can run would be best.
If that ain't enough I could always bump 'er up
a 1/2 psi at a time.
What do ya'll think?

 

[ClemsonCruiser]

isn't the weber recommended for something like 4psi?

 

[GXO]

f factory spec is 4-5 pounds.

 

[Gundy]

Doh!

isn't the weber recommended for something like 4psi?

LOL...well, I guess I could drag out that Weber book and see.
(fumbles through old dusty file folders)
It says: MUST NOT exceed 24kPa ( whatever the hades THAT means)
or 3.5 p.s.i.
When all else fails read instructions.
I think I'll start at 2 p.s.i. or something kPa and go from there
NOT EXCEEDING 3.5.

 

[ClemsonCruiser]

3.5 rounded up is 4............ so I was close

good luck david

 

[GXO]

I vote for 11, let's light things up!

 

[clemson55]

Why not just start at 3.5 like they say. I imagine that weber knows how much psi their carb needs for proper functioning.

 

[ClemsonCruiser]

blasphemy.......... never follow instructions

 

[clemson55]

I know right I think you and I made a living working on cruisers without consulting directions or books of any kind. What am I thinking.

 

[Capt. Jim]

It says: MUST NOT exceed 24kPa ( whatever the hades THAT means)

Pa is an abbreviation for the pressure unit of measure PASCAL, metric, I belive 1 pascal = 1 newton/meter. 24kPa = 24,000 Pascals.

Give me PSI anyday............

 

[ClemsonCruiser]

Pa is an abbreviation for the pressure unit of measure PASCAL, metric, I belive 1 pascal = 1 newton/meter. 24kPa = 24,000 Pascals.

Give me PSI anyday............

well done sir!!!


Pascal (unit)
From Wikipedia, the free encyclopedia
Jump to: navigation, search
For other uses, see Pascal.
The pascal (symbol: Pa) is the SI derived unit of pressure or stress (also: Young's modulus and tensile strength). It is equivalent to one newton per square meter. In everyday life, the pascal is most commonly used in the form of hectopascal (1 hPa = 100 Pa). One hectopascal corresponds to about 0.1% of atmospheric pressure (near sea level).




[edit] Definition
1 pascal (Pa) ≡ 1 N·m−2 ≡ 1 J·m−3 ≡ 1 kg·m−1·s−2
Pressure Units
Pascal
(Pa)
Bar
(bar) Technical atmosphere
(at)
Atmosphere
(atm)
Torr
(mmHg) Pound-force per
square inch
(psi)
1 Pa ≡ 1 N/m² 10−5 10.197×10−6 9.8692×10−6 7.5006×10−3 145.04×10−6
1 bar 100 000 ≡ 106 dyn/cm² 1.0197 0.98692 750.06 14.504
1 at 98 066.5 0.980665 ≡ 1 kgf/cm² 0.96784 735.56 14.223
1 atm 101 325 1.01325 1.0332 ≡ 1 atm 760 14.696
1 torr 133.322 1.3332×10−3 1.3595×10−3 1.3158×10−3 ≡ 1 mmHg 19.337×10−3
1 psi 6 894.76 68.948×10−3 70.307×10−3 68.046×10−3 51.715 ≡ 1 lbf/in²

Example reading: 1 Pa = 1 N/m² = 10−5 bar = 10.197×10−6 at = 9.8692×10−6 atm ....etc.
Note: mmHg is an abbreviation for millimetres of mercury.


[edit] Origin


blah blah blah.............. set it to 3.5 PSI daivd

 

[SCJO06]

I totally agree with JP...........

 

[Gundy]

I don't know about setting it at 3.5 psi.
The book has the words NOT TO EXCEED in bold face as a warning.
Why set it at the edge of the cliff , so to speak?
I gather the Webers like low pressure. They sure don't have a warning
about NOT BELOW anything. I'll start at 2 psi and go from there.
Man, that discussion of kPa made my head hurt.
LOL.....as tight as my fuel line is I'd bet I'm dang near Dan's
suggested 11 psi. I know when I removed the line on a trail
to fill a gas tank for a Cruiser out of gas it sure shot the fuel
out. We filled a 5 gallon can in no time flat. Sure beat siphoning
with a hose. Poor dude was dang near green after his first two attempts
at sucking gas through a hose. Ewwwww...

 

[Gundy]

So much for the book/experts

Dang, I installed the regulator and set it to 2 psi
(redline/weber recommends 2 to 3 psi) and the truck
won't even start. LOL
I set it to 3 and it will start but cuts out. So...3 1/2
and the cutout is less but still there. Mind you this is the MAX
they recommend. 4 psi and it's better. 4 1/2 is still better.
At 5 psi everything runs sweet. No stumbles or cutouts.
At 5 1/2 psi it stumbles off idle but doesn't cutout.
So....5 psi is where it's at for old Gundy. Go figure.
I guess the 20 year old Weber is set in it's ways.
Ahhh...the joys of a 38DGAS carb. %#@@*&(^$#

 

[Hard40]

Modulus Of Coefficient?

Pascal (unit)
From Wikipedia, the free encyclopedia
Jump to: navigation, search
For other uses, see Pascal.
The pascal (symbol: Pa) is the SI derived unit of pressure or stress (also: Young's modulus and tensile strength).


Now there's an educated man for you. Didn't he attend Clemens?
Dave, Open to 1000 yds./gal @ 15 PSI. You'll have your own homemade Throttle Body. P.S. Keep Away From Sparks and Flame!

[edit] Definition
1 pascal (Pa) ≡ 1 N·m−2 ≡ 1 J·m−3 ≡ 1 kg·m−1·s−2
Pressure Units
Pascal
(Pa)
Bar
(bar) Technical atmosphere
(at)
Atmosphere
(atm)
Torr
(mmHg) Pound-force per
square inch
(psi)
1 Pa ≡ 1 N/m² 10−5 10.197×10−6 9.8692×10−6 7.5006×10−3 145.04×10−6
1 bar 100 000 ≡ 106 dyn/cm² 1.0197 0.98692 750.06 14.504
1 at 98 066.5 0.980665 ≡ 1 kgf/cm² 0.96784 735.56 14.223
1 atm 101 325 1.01325 1.0332 ≡ 1 atm 760 14.696
1 torr 133.322 1.3332×10−3 1.3595×10−3 1.3158×10−3 ≡ 1 mmHg 19.337×10−3
1 psi 6 894.76 68.948×10−3 70.307×10−3 68.046×10−3 51.715 ≡ 1 lbf/in²

Example reading: 1 Pa = 1 N/m² = 10−5 bar = 10.197×10−6 at = 9.8692×10−6 atm ....etc.
Note: mmHg is an abbreviation for millimetres of mercury.


[edit] Origin


blah blah blah.............. set it to 3.5 PSI daivd[/QUOTE]