Vac-U-Pan Crankcase Extractors On The Street???

[74Beeper]

Has anyone had or heard of people having luck running vac-u-pan crankcase extractors on the street with a low restrictive exhaust system?

I know they say they're only for open exhaust but I've heard of people running them with mufflers and would like to hear from people who have actually had luck with this and what exhaust they're running with them.

Im running 440ci small block with 1-7/8" to 3" long tube TTI headers, 3" X-pipe TTI exhaust system with Flowmaster Super 10 series off-road/race mufflers.

Any insight on this is greatly appreciated.

 

[69Bee]

If this is what I think it is, why would you use a racing crankcase evacuation system when the motor should already have a working PVC system?

 

[74Beeper]

If this is what I think it is, why would you use a racing crankcase evacuation system when the motor should already have a working PVC system?

This is a 700+ HP street/strip small block. No PCV on this motor.

 

[69Bee]

Fair enough. We were looking to use a Moroso Pan-O-Vac (or whatever it was called), on the race car, but figured out the problem we were having. Basically, equating it to a draft tube, it should work fine at higher RPM, but no to effectively at lower RPM, to not at all at idle. If anything, I would consider checking/changing the oil and filter more often.

 

[ozymaxwedge]

Should be fine with a healthy engine, vent from the front of the covers with splash baffles of some sort.

 

[Longroof]

Are you running a low tension oil ring in the engine?

 

[lewtot184]

if there is any back pressure in the exhaust i doubt they would work.

 

[74Beeper]

I've decided not to run them. My engine guy (Ryan J. @ Shady Dell Speed Shop) just told me they're not worth it. Even if the exhaust has no back pressure, they pull the oil mist from the crankcase then it gets burned in the exhaust, making your look like a smokey piece of crap.

 

[383man]

I run a solid flat tappet thats 264 and 270 @ .050 with .585 and .592 lift on a 110 LSA and I have enough vacum to run a PCV system. I was just running a breather on each valve cover but went back to a PCV valve system since it pulls enough vacum to work and I like running it on the street. When I go racing I just block the PCV valve and put a breather on that cover since the PCV valve wont vent much at all on full throttle. I have heard of some guys sucking most of the oil out of the oil pan when they did not have their vacum pump systems set up right. Ron

 

[74Beeper]

I run a solid flat tappet thats 264 and 270 @ .050 with .585 and .592 lift on a 110 LSA and I have enough vacum to run a PCV system. I was just running a breather on each valve cover but went back to a PCV valve system since it pulls enough vacum to work and I like running it on the street. When I go racing I just block the PCV valve and put a breather on that cover since the PCV valve wont vent much at all on full throttle. I have heard of some guys sucking most of the oil out of the oil pan when they did not have their vacum pump systems set up right. Ron

My cam is a Bullet solid roller 262/266 @ .050 and .690 lift with 110 LSA installed 2* advanced. Not sure what my vacuum with be just yet. Still getting motor back together. I'm guessing i'll just end up running a vented catch can.

 

[cudatom]

I've decided not to run them. My engine guy (Ryan J. @ Shady Dell Speed Shop) just told me they're not worth it. Even if the exhaust has no back pressure, they pull the oil mist from the crankcase then it gets burned in the exhaust, making your look like a smokey piece of crap.

Started using them in 1989. Had what I refer to as my junk yard motor in my cuda. Just a bunch of used parts that were reconditioned. Not a super fast car , ran 10.82 at Norwalk back then. Well when I 1st took it out it smoked down the track ea run. To much crank pressure. I had oil coming out the dipstick tube, you name it and oil was being pushed out of it. Track asked me to remedy this before coming back, and rightfully so. Installed the set up during the week and no more leaks or smoke. Ran it for 13 yrs till the engine let loose. I've used this on 3 separate engines now and never any smoke or blow by issues.
Definitely not saying I'm smarter because I'm no where near as knowledgeable as Ryan just explaining I never experienced what was said.

 

[Budnicks]

I too have ran them on street/strip cars having no issues either