1/16 Hole in the intake manifold under the carby

Bradford Society Trust · Tue Jul 17, 2007 11:24 am

has anyone information on what the 1/16 hole in the intake manifold under the carby is there for[/list]

Keith Andrews · Post by **Keith Andrews** » Tue Jul 17, 2007 8:51 pm

Thats what I was told, but I cant see that being the reason
Access fuel will not logically pool there.
A flooded engine can be easly clearded by pumping thru the engine with WOT and held there
I have never managed to flood my Bradford.
In effect it is a manifold 'leak'
I cant see any reason for it, and have blocked off to see any effect, and didnt notice any, other than having to change idle circuit mixture.

george garside · Post by **george garside** » Tue Jul 17, 2007 11:03 pm

not absolutely certain or perhaps not even a bit sure about this one but from what I can recolect the said orifice was definately put there for a purpose which I think could have been tied up with the need for the 'horn' on top of the carb to prevent flames shooting up in the event of a bad blow back. That bit is correct & was given to me by the lateHorace Grimley. now to the uncertain bit! the orifice may have been tied up with what Jowetts considered to be a real risk of conflagration by providing a drain to prevent accumulation of ignitable unburnt fuel in the induction pipe immediately below the carb.
Any other ideas around - unless anybody can come up with a better theory I would advise that the orifice be left as intended!
george

george garside · Post by **george garside** » Tue Jul 17, 2007 11:04 pm

not absolutely certain or perhaps not even a bit sure about this one but from what I can recolect the said orifice was definately put there for a purpose which I think could have been tied up with the need for the 'horn' on top of the carb to prevent flames shooting up in the event of a bad blow back. That bit is correct & was given to me by the lateHorace Grimley. now to the uncertain bit! the orifice may have been tied up with what Jowetts considered to be a real risk of conflagration by providing a drain to prevent accumulation of ignitable unburnt fuel in the induction pipe immediately below the carb.
Any other ideas around - unless anybody can come up with a better theory I would advise that the orifice be left as intended!
george

george garside · Post by **george garside** » Tue Jul 17, 2007 11:04 pm

not absolutely certain or perhaps not even a bit sure about this one but from what I can recolect the said orifice was definately put there for a purpose which I think could have been tied up with the need for the 'horn' on top of the carb to prevent flames shooting up in the event of a bad blow back. That bit is correct & was given to me by the lateHorace Grimley. now to the uncertain bit! the orifice may have been tied up with what Jowetts considered to be a real risk of conflagration by providing a drain to prevent accumulation of ignitable unburnt fuel in the induction pipe immediately below the carb.
Any other ideas around - unless anybody can come up with a better theory I would advise that the orifice be left as intended!
george

george garside · Post by **george garside** » Tue Jul 17, 2007 11:05 pm

not absolutely certain or perhaps not even a bit sure about this one but from what I can recolect the said orifice was definately put there for a purpose which I think could have been tied up with the need for the 'horn' on top of the carb to prevent flames shooting up in the event of a bad blow back. That bit is correct & was given to me by the lateHorace Grimley. now to the uncertain bit! the orifice may have been tied up with what Jowetts considered to be a real risk of conflagration by providing a drain to prevent accumulation of ignitable unburnt fuel in the induction pipe immediately below the carb.
Any other ideas around - unless anybody can come up with a better theory I would advise that the orifice be left as intended!
george

george garside · Post by **george garside** » Tue Jul 17, 2007 11:06 pm

not absolutely certain or perhaps not even a bit sure about this one but from what I can recolect the said orifice was definately put there for a purpose which I think could have been tied up with the need for the 'horn' on top of the carb to prevent flames shooting up in the event of a bad blow back. That bit is correct & was given to me by the lateHorace Grimley. now to the uncertain bit! the orifice may have been tied up with what Jowetts considered to be a real risk of conflagration by providing a drain to prevent accumulation of ignitable unburnt fuel in the induction pipe immediately below the carb.
Any other ideas around - unless anybody can come up with a better theory I would advise that the orifice be left as intended!
george

george garside · Post by **george garside** » Tue Jul 17, 2007 11:09 pm

sorry for the multiplicity of identical postings - must have haad fidgety finger on mouse
g