2010 at the Hammond Barn

[Bob Carriere]

Hi Phil

My dual spin on are mounted open end on top underneath the floor on the passenger side..... combined they do provide over a quart of extra oil and serve as a good cooler...... my engine usually takes about 20 minutes of fast idle before it settel to about 160 degrees.... never get hotter.

The oil tanks on rock crawlers are piped in from the bottom with a tire pressure valve at the top end..... so they can bleed enough air to allwo the tank to fill to about 66 to 75%...close the valve and thenlet the oil pump build pressure by compressing air trapped in the top..... this is meant to protect when the vehicle is at extreme angle and the pump looses its prime or sucks air...... with there big V8 running at high rpm even a few seconds of oil starvation would have quick cumulative negative results.

Call the carb rebuilder in TO and explained my situation.... he had a very quick reaction...."of course... the Rochester carb cover is vented and gas would leak out".... told him the engine did not falter at extreme angle..... agai...."that is because we use new gaskets and the bowl cannot leak into the carb central opening... they are sealed seperate by the gasket..."

One possibility would be tosealed the existing manufacturer vent and drill and install a new vent hole with a pipe/line connected to the vent ...said pipe would have to be mounted significantly higher than the carburator.

Reminds me of the axle vent caps on mudder 4x4.... we use to remove the cap and attach a rubber hose which we ran up to the inside of the cargo box fenders for the rear and into the engine compartment for the front axle.. Not prepared to do that yet.

Carb guy is looking for a YF 879s... which was a after market carb for GM 261 and 270..... they do not make them anymore and are hard to find.... another possibility is a Zenith 28-228 but even harder to locate.

Wondering if a 251 M 37 watertight carburator wold work... I know for a fact they do not leak...even upside down..... Turns out the bolt pattern is the same.... benefit of the governor.... carbs and kits readily avaialble.... 251 vs 261 should be within same CFM range....but.... throttle location and fuel inlet is very different...... and I have a few to work with....

Makes me want to rebuild up a spare 261 I have and set up a test bed.... great Winter project....this is a short block and would need to find a good head.....

Diesel vs gas...... less volatile and diesel creeps where gas would not go.... don't think it would damage gaskets and needle rubber.....

Hope the weather is good enough to take a few wild photos this weekend.

Later sir...!

Bob