[tbitz]

A lot of the guys converting to EFI are cutting up the airbox and removing most of the CIS components.

One component being removed is the hose going from the CIS intake boot to the OIL filler tube.

It's been a while since I was running stock CIS, but I recall there was a small vacuum when opening the oil filler cover. This vacuum , I believe, helps suck out gases in the crankcase (ie: combustion gases that make it past the pistons and into the crankcase).

In most EFI conversions, the hose from the oil filler tube to the CIS rubber boot is removed and there is no vacuum going back to the crankcase. I wonder if this may lead to problems down the road?

Perhaps a small PCV valve needs to connect the crankcase to the vacuum side of the airbox.

I thought I'd bring this up for discussion since alot of folks are converting to EFI these days.

Cheers,