PCV system on a 93 LT1 w/ procharger. What have you all done to it?
04-23-2009, 12:37 PM
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PCV system on a 93 LT1 w/ procharger. What have you all done to it?
Im adding an ATI procharger to a 93 LT1.
The instructions say to remove the PCV valve, put a 90 degree elbow in to it, connect it to the valve breather tube and run it into the air cleaner (or to a catch can).
Obviously, the point is to not pressurize the crankcase during boost.
Some people have retained their PCV system, but put a check ball in place.
What have you all done?
What are the advantages/disadvantages to retaining the PCV valve?
The instructions say to remove the PCV valve, put a 90 degree elbow in to it, connect it to the valve breather tube and run it into the air cleaner (or to a catch can).
Obviously, the point is to not pressurize the crankcase during boost.
Some people have retained their PCV system, but put a check ball in place.
What have you all done?
What are the advantages/disadvantages to retaining the PCV valve?
04-24-2009, 02:51 PM
#2
Your PCV system keeps your engine clean and also limits emissions. It's a good system since it helps prevent sludge etc. by purging the crankcase with fresh air while under light load. There is no loss of power with a PCV system.
The problem with the PCV system when going with a blower or turbo is that the PCV valve will pass some boost to the crankcase @ WOT. That's NG as we obviously want the least amount of crankcase pressure (less crankcase pressure = more power).
The simple solution is to put an in-line checkvalve in series with the PCV valve. The issue with doing this on an LT1/LT4 is you have to add a long 3/8" id hose which is 'ugly'. Consequently I made a billet PCV valve for the LT1/LT4 with an internal checkvalve. Only problem with it is the cost: $49.00.
I also sell 3/8" barbed hose checkvalves for $5 (up to 10 psig) and $15 (no limit) that you can use if you want to deal with the long hose.
Best regards, greg
The problem with the PCV system when going with a blower or turbo is that the PCV valve will pass some boost to the crankcase @ WOT. That's NG as we obviously want the least amount of crankcase pressure (less crankcase pressure = more power).
The simple solution is to put an in-line checkvalve in series with the PCV valve. The issue with doing this on an LT1/LT4 is you have to add a long 3/8" id hose which is 'ugly'. Consequently I made a billet PCV valve for the LT1/LT4 with an internal checkvalve. Only problem with it is the cost: $49.00.
I also sell 3/8" barbed hose checkvalves for $5 (up to 10 psig) and $15 (no limit) that you can use if you want to deal with the long hose.
Best regards, greg
04-26-2009, 05:00 PM
#3
Give Blower Works a call. Greg will give you your potential options and allow you to decide what you want. I have had outstanding dealings with Greg and he stands behind his products and work. My experiences dealing with Greg have been very educational in the supercharging arena. 
