2010 at the Hammond Barn

[Bob Carriere]

Encountered a slight technical difficulty on SUnday while driving my C15a chassis.

AS you know Rob and I have had our stock Rochester B carburators rebuilt and flow tested by the Oak brothers in TO. Both our vehicles now run so ever much better...... and they look brand new.

Well I was driving mine in the back field using just a fast idle setting when I decided to see if it would climb the steep...45 degree... pile of wood chip located in a corner of the back field. Amazing.... in low gear..low range 4x4 it went all the way up with out even hesitating or spinning...... did it a few times but chickened out going over the top has I had vision of possibly flipping over backwards and with no body/roof.... well I backed down. Did it again a few times and noticed that at a steep angle the carb was flowing raw gas ...literaly dripping gas...... not a good thing if all those fumes could collect inside the engine compartment......did not seem to affect engine performance...

I raised my problem on the Stove bolt site and CarbKing confirmed that I may have exceeded the design of the civilian Rochester B carb which is intended for flat street driving. He even commented that the W-1 may have been better designed for such extreme military activity but defenitely too small for my 261 engine. He recommended sourcing a military carburator that would have been original on a GMC 270 engine.

Phil have you had any similar experience with your new 261/Rochester combo?

Does any one know what carb I should be looking for that fits a 270 GMC...?

There is a possibility that a YF Carter ( carb ## ??) carb for a large 6 cylinder Jeep may fit the 261 CFM appetite..... the YF did have a special option for extreme tilt conditions experienced by CJ Jeeps in the 70s.

Any suggestions...comments... besides staying on flat ground.


Bob