PCV, advantage or not?

[Pat Cook]

So Bub, theoretically speaking, so as not to give any thing away. If the engine is sealed up good and tight, a brake booster check valve could be used in one of the valve covers, a length of sizable hose could be used to connect the booster check valve to the carb, say at the original connection for the PCV connection.

Then lets say this theoretical system could be used to pull a vacuum in the engine and aid in ring seal? say after the car turns on the first amber in the staging process, the driver puts the car in neutral and wings the engine a few times......say kinda like pulling a really good vacuum on a "large can" this vacuum would last long enough to get the car to the other end of the track before crank case pressure exceeded the vacuum,

All in theory of course.....

[Bub Whitaker]

Originally Posted by Pat Cook

So Bub, theoretically speaking, so as not to give any thing away. If the engine is sealed up good and tight, a brake booster check valve could be used in one of the valve covers, a length of sizable hose could be used to connect the booster check valve to the carb, say at the original connection for the PCV connection.

Then lets say this theoretical system could be used to pull a vacuum in the engine and aid in ring seal? say after the car turns on the first amber in the staging process, the driver puts the car in neutral and wings the engine a few times......say kinda like pulling a really good vacuum on a "large can" this vacuum would last long enough to get the car to the other end of the track before crank case pressure exceeded the vacuum,

All in theory of course.....

DING DING DING... we have a winner

[Tand E racing]

This is a little off the PCV valve topic, am curious if any one here has tried attaching a PCV valve or e-vac system to the area where the stock fuel pump would go? (chebbie of course) seems like a great place to evacuate from.

[Bub Whitaker]

Originally Posted by Tand E racing

This is a little off the PCV valve topic, am curious if any one here has tried attaching a PCV valve or e-vac system to the area where the stock fuel pump would go? (chebbie of course) seems like a great place to evacuate from.

The crank spinning clockwise is throwing oil at that area, the passage to the cam for the fuel pump pushrod is also filling that area, so no...all you will evacuate is oil...even trying to read vacumn from there will give you false readings from all the oil that accumulates

[Jeff Lee]

Well Bub, your half-way there! OK, maybe 3/4 there...

[Ed Carpenter]

There is one particular Super Stocker that I can think of that has it and he is wicked fast. There has to be a reason to do it.

[Ian Hill]

Originally Posted by Pat Cook

So Bub, theoretically speaking, so as not to give any thing away. If the engine is sealed up good and tight, a brake booster check valve could be used in one of the valve covers, a length of sizable hose could be used to connect the booster check valve to the carb, say at the original connection for the PCV connection.

Then lets say this theoretical system could be used to pull a vacuum in the engine and aid in ring seal? say after the car turns on the first amber in the staging process, the driver puts the car in neutral and wings the engine a few times......say kinda like pulling a really good vacuum on a "large can" this vacuum would last long enough to get the car to the other end of the track before crank case pressure exceeded the vacuum,

All in theory of course.....

this all sounds good except the "...and wings the engine a few times..". i thought the PVC port creates the most vacuum at idle? wouldn't you be better to do the burn out, give the carb a few wacks if thats what your into, then pre stage and stage as close to idle as you can to create maximum vacuum

Ian

[Buicksstage1]

Originally Posted by junior barns

what does PCV stand for?

Positive Crankcase Ventilation.......Chris

[Bub Whitaker]

Originally Posted by Jeff Lee

Well Bub, your half-way there! OK, maybe 3/4 there...

Thanks Jeff, but I'm all the way there... At my age, I'm just backin off a little for you guys..

and Ian Hill, part throttle builds the most vacume

[Pat Cook]

and a PCV valve does not hold a vacuum as well as a brake booster check valve.