Breathers on performance engines

[slammedresto]

ive currently got a CB breather , but ive recently been given one of the cylinder/pipe type breathers, so im going to swap the CB out for a standard chrome filler and use the new breather

whats the best way to vent it, how many outlets do i need to use, any preference to venting to carbs or valve covers, or do i do both???

engine is a 1914 with twin 40s, CB breatjer currently has one out let going to 1 valve cover (do both need doing?????) another vented to atmosphere

new breather, has 5 outlets, ignore the pipes etc, engines not in at the mo

 

[AxlFoley]

when i had one on my bug, i had one at each cilinder head, and one from the oil filler, I'm not sure where else would need venting.

Mark

 

[Araon]

Little confused here...

you wont be venting to the valve covers rather venting the valve covers to atmosphere or into the carbs....

personally I would rather vent to atmosphere, if going to the ar filter then you will in effect be drawing on the air / vapour the idea with these is really to equalise the pressure on the engine as it is a big pump you just want to make it easier to function.

so both rocker covers, crank case, 1 spare hmmmm maybe for relief valves and the vent to atmos or carb.

 

[K@rlos]

I would have 1 from each rocker cover and maybe 1 from the crankcase itself. You would need to have removed the standard fuel pump, fiited an electric 1 like a facet and bolted a block off in it's place which has a boss for a breather attachment. If it was a 2276cc screamer then you might need something more ample