SIVAllan
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Does anyone have a view on optimal jetting for 40DCOE's on a CLONE-H120 engine?
In the WSM.149 (Rootes Hunter Range) I see for example that from the factory, for the Hunter GLS:
Model carb:
40DCOE 34 & 35 (Italian not Spanish)
--choke tube (large venturi) 30 mm.
--Auxillary (small venturi) 4.5 mm
--Main jet 100
--Idle jet 45 F4
--Pump jet 35
--Starting jet 60 F.S.
--Emulsion tube 4.14
--Air correction jet 140
--Needle valve 1.75
In contrast here are specs on a pair of new DCOE's offered by a UK vendor:
... very latest specification 40 DCOE Weber carburettor.
Brand new stock from the re-tooled Spanish factory & back to Italian quality.
Supplied with:
30mm Chokes,
4.5 A/vents
115 mains
200 airs
45F9 idles
40 pumps
50 b/bleed
F11 E/tubes
175 N/valve
Differences:
40DCOE 34 & 35 vs. NEW DCOES
--choke tube (large venturi) 30 mm. --SAME - 30
--Auxillary (small venturi) 4.5 mm --SAME 4.5
--Main jet 100 --115
--Idle jet 45 F4 --45 F9
--Pump jet 35 --40
--Starting jet 60 F.S.
--Emulsion tube F.14 --F.11
--Air correction jet 140
--Needle valve 1.75 --SAME--1.75
I am just now beginning my search for a replacement pair of the webbers, and see that most currently available are jetted differently than the vintage 40DCOE 34/35's.
Given my lack of webber knowledge it seems safer to seeK the same configuration as used by the factory, but the factory specs may be out-of-date compared to more recent experience.
Sooner or later a pair of 34/35's will tun up, butg there's no sense in waiting if anyone knows of good reason to ignore the Hunter GLS H120 configuration...
Thanks in advance,
Allan
In the WSM.149 (Rootes Hunter Range) I see for example that from the factory, for the Hunter GLS:
Model carb:
40DCOE 34 & 35 (Italian not Spanish)
--choke tube (large venturi) 30 mm.
--Auxillary (small venturi) 4.5 mm
--Main jet 100
--Idle jet 45 F4
--Pump jet 35
--Starting jet 60 F.S.
--Emulsion tube 4.14
--Air correction jet 140
--Needle valve 1.75
In contrast here are specs on a pair of new DCOE's offered by a UK vendor:
... very latest specification 40 DCOE Weber carburettor.
Brand new stock from the re-tooled Spanish factory & back to Italian quality.
Supplied with:
30mm Chokes,
4.5 A/vents
115 mains
200 airs
45F9 idles
40 pumps
50 b/bleed
F11 E/tubes
175 N/valve
Differences:
40DCOE 34 & 35 vs. NEW DCOES
--choke tube (large venturi) 30 mm. --SAME - 30
--Auxillary (small venturi) 4.5 mm --SAME 4.5
--Main jet 100 --115
--Idle jet 45 F4 --45 F9
--Pump jet 35 --40
--Starting jet 60 F.S.
--Emulsion tube F.14 --F.11
--Air correction jet 140
--Needle valve 1.75 --SAME--1.75
I am just now beginning my search for a replacement pair of the webbers, and see that most currently available are jetted differently than the vintage 40DCOE 34/35's.
Given my lack of webber knowledge it seems safer to seeK the same configuration as used by the factory, but the factory specs may be out-of-date compared to more recent experience.
Sooner or later a pair of 34/35's will tun up, butg there's no sense in waiting if anyone knows of good reason to ignore the Hunter GLS H120 configuration...
Thanks in advance,
Allan