Fi Tech and pcv

[Rick Bollinger]

Ok I have been researching this for awhile and just want to be sure. On my Fi Tech there is no pcv vacuum port only brake booster and distributor so. I go from pcv valve on passenger side to intake manifold port. Then from drivers side valve cover to filtered air at the air cleaner. Is this correct?
Thanks
Rick

[Orange Crate]

You might have more success posting in the Engine/Drivetrain section. Maybe a Mod can move this for you (I wouldn't repost, wait for a Mod)

[PbFut]

FiTech what? Intake? Which one? Pics would help. Generally you want a dedicated port for each of your brakes, tranny, PVC. If you have AC it can share tranny. Distributor may or may not need timed vacuum off the carb port. Or it might need the distributor locked out depending on the FiTech system you are using. Lots of variables. More info required to get a accurate answer.

[Rick Bollinger]

It is the Fi Tech Go EFI 4 600 hp. After reading it again it does have a pcv port on the back passenger side. It is a 3/8 port opposite side of the brake port. So if I am correct this port will go to the pcv valve on the passenger side valve cover. Then from the driver side valve cover to the clean air side of the air cleaner for a closed system. Just looking for confirmation of this with the Fi Tech.

[Rick Bollinger]

PbFut No lockout on dist. mechanical only engine builder says no vacuum advance it is a MSD Street fire HEI. Vacuum off of manifold for A/C. 700R4 tranny so no vacuum yet until I add a vacuum switch for lockup.

[PbFut]

Sounds like you got it right. The PCV valve can go on either cover. The hose to the air cleaner can be substituted for a old fashioned valve cover vent cap if that is desired. Often times way easier to deal with. Think of the vacuum lines like a sprinkler system. The more connections the more chance of problems or the vacuum pressure dropping due to leaks. That is why you want the booster on it's own line to the engine. The booster has it's own reservoir but it be useless if the one way valve is leaking. Often overlooked.

[HalfBrit]

PbFUT, could you expand on the one way valve comment.

[PbFut]

On the brake booster, there is a round plastic fitting that the 3/8 inch hose connects to. That part is inexpensive. It is robust but they can fail or leak back. Not particularly dangerous if engine has good vacuum. But if you have an engine that drops vacuum on throttle and slow to build vacuum, the reservoir in the booster will be low. That can effect performance of the power performance of the brake booster and that can be a real surprise at the worst time. That little one way valve is just a few bucks and will hold reserve vacuum in the booster reservoir. I am not sure but I recall seeing something about a safety requirement of 2 full strokes of full power.

[HalfBrit]

Thanks for the clarification. I had always assumed it was just a plain 90.