DF-17 Dual Flow Mode Tuning Video

This video gives an overview of tuning the DF-17 Dual Flow PCV valve. For more information visit www.mewagner.com

[@MrFreekyByg]

Excellent product. My 454 big block has a radical cam with a very low fluctuating vacuum signal. I set the PCV according to your fixed orifice mode and now have excellent oil control. I was pushing oil out of the valve covers previously. I would highly recommend your product! Thanks guys.

[@avman1339]

Your product is OUTSTANDING highly recommended! Your instructions and instructional videos are well done and thorough. Your tech support is also courteous and thorough. I bought 2 of your PCV valves, one for my 440 6bbl Roadrunner and one for my wife's 421 Tripower! GTO

[@MEWagnerPerformance]

Thank you!

[@ScottDLR]

I can't believe the difference this made!!! Even though I used a PCV for a similar application, it was wrong for my very mild custom build. I have been living with rough running for 20+ years and this device has transformed my Ford 390. If I could make one suggestion; it would be nice to be able to purchase an optional billet cap to cover the adjustment screws for a cleaner look.

[@MEWagnerPerformance]

Thank you for your feedback! Glad it made a difference for you. If you're interested in having us add your car to our customer's rides page on our website (mewagner.com/?p=1603) send me an email at [e-mail] and we can set it up. Thanks!

[@66ElCamino357]

I'm excited to get my DF-17 PCV valvw for my SBC 357 TPI...

[@dawsonrice9949]

Would it be recommended to use a baffle on the valve cover with the PCV?

[@MEWagnerPerformance]

Thanks for your question. Yes, proper baffling is essential to your PCV system's operation. Otherwise the PCV system can consume excessive amounts of oil. We did a baffle study that you might find interesting on our website (mewagner.com/?p=1221 )

[@Adam-hj4hz]

I see there’s a motor trend article where they installed this into the valley pan of a 455 Pontiac. I will be selling this the same way in a 400. Do I need any of the adapters to do such or is everything I need included?

[@MEWagnerPerformance]

If you aren't mounting the PCV in the valve cover, you will need one of our adaptor accessories here: mewagner.com/?p=540 You can select the adaptor you want as an add-on when you add the DF-17 PCV valve to your shopping cart. Let us know if you have any more questions.

[@johnmilner7603]

When your tuning the valve and you have an oil catch can, do I bypass the catch can or leave it connected. My PCV hose connects from the PCV valve to the IN side of the catch can then another hose connects from the OUT side of the catch can which then connects to the PCV port on the Holley carb.

[@MEWagnerPerformance]

You should leave your catch can in place in case there are any vacuum losses through it. The goal is to tune with the same amount of vacuum at the PCV valve that the valve will actually "see" during driving conditions. Let us know if you have any more questions. Thanks!

[@johnmilner7603]

MEWagnerPerformance thx for the quick reply.

[@JMAGG]

My 496 BBC keeps leaking at the back of my intake manifold. Do you think this will help?

[@MEWagnerPerformance]

We have helped countless customers solve oil leak issues resulting from crankcase pressure caused by poorly functioning PCV systems. If your gaskets and seals are properly installed and you still have leaks, crankcase pressure could be the problem. Here is an oil leak case study that you might find interesting: mewagner.com/?p=2173

[@Michael-Homerepair76]

I have 2 Questions … I have a stroked 454 (496) Chevy big block with a cam that creates low vacuum. I don’t have a lot of oil consumption, but have been blowing oil from my breathers, and out almost every gasket on the engine. I’ve read about other people that have talked about their motors on KZbin with your product, as I do not want to use a vacuum pump, I hope this can cure my problem. First question: For my situation, Do you recommend a catch can in addition to the PCV valve? Second question: Specifics on routing the piping? Thank you for your help.

[@MEWagnerPerformance]

Michael - thanks for the question and yes, we can help you. Send me an email at [e-mail] and we can get into the specifics on your application. Thanks!

[@tunnelportterror]

any increase in PCV flow attained by this valve's design, by opening the orifice larger, or adjusting the spring tension, will put more blowby oil mist into the intake manifold, and dilute the air/fuel charge. IMHO, it absolutely MUST be used with a Moroso or similar oil separator, also would be a good idea even with a STOCK pcv valve ! engines were not designed to run on oil, and oil contamination leans the mixture, and also causes detonation. even the lightest amount of oil in the combustion chamber in a racing engine, will push a high compression engine into spark detonation. it's a good idea to put a vacuum in the crankcase, but not to put increased, unfiltered PCV flow into the intake manifold runners ! the ultimate system is a crank or belt driven vacuum pump, pulling on the crankcase, through an oil separator, and dumping to atmosphere, or into the header collectors- nothing into the intake manifold. I've pulled many intake manifolds in 40 years of working on cars, take a look at what the runners of an intake manifold look like with PCV attached after many years. they're coateed with a grimy layer of oil and sludge ! so, you're trying to avoid sludge in the crankcase as a selling point, and instead creating sludge in the intake manifold, and diluting the air/fuel charge with oil mist. crankcase gases were never meant to be "reburned", the engine is not a waste incinerator. that was only done by state/federal mandate in the early-mid 1960's, and from an engine standpoint, it's a bad idea. it was a political move.

[@MEWagnerPerformance]

Thanks for the feedback, and yes we agree 100% that if possible using an air-oil separator is preferred. Another area that often gets overlooked is baffle design. A poorly designed baffle can cause a lot of oil consumption through the PCV system which can aggravate the issues you are describing. That being said, a PCV system, when configured properly, can be made to work well on a street driven engine. With proper configuration of the PCV system as a whole, the tradeoffs of intake sludge and air / fuel charge dilution can be minimized to the point where the benefits greatly outweigh the tradeoffs. The benefits are beyond just emissions and include keeping oil clean, reducing crankcase moisture and sludge, reducing oil leaks, reducing oil smell in the car, and keeping the engine bay clean. On race only applications, we usually do steer customers away from our valve (or any PCV valve for that matter) and toward a header evac system or vacuum pump as you mentioned. If you have any further questions about our product I'd be happy to answer them. We also have been featured in several magazine articles that do a good job of explaining the benefits of our product here mewagner.com/?p=1082 if you'd like to read any further. Regards, Matt Wagner M/E Wagner Performance Products

[@redj7401]

I have a 289 engine with your valve, stock valve covers are baffled and I have the Moroso air/oil separator. My oil doesn't stay as clean looking as it used to even though this is a totally rebuilt engine. So I'm thinking not enough PCV flow? I have 20hg of vacuum. Which circuit do I adjust? and direction for the adjusting screws? Thank you

[@MEWagnerPerformance]

You can try some additional flow through the valve to see if it helps. Increase the flow rate by backing the idle screw out 1/4 turn from your current setting (counterclockwise). Then be sure to re-tune the cruise circuit transition point after any changes to the idle circuit flow. Also as you increase flow rate, be sure you have proper baffling (mewagner.com/?p=1221) and monitor for oil consumption and plug fouling. What setting are you using on the idle circuit now? Thanks!

[@redj7401]

@@MEWagnerPerformance Appreciate the reply. Right now I have the idle circuit at 1-1/2 turns and adjusted the cruise circuit as per your manual.

[@MEWagnerPerformance]

@@redj7401 That should be plenty of flow given your engine size and vacuum levels. Do you notice any other symptoms of inadequate PCV flow, such as oil smell in the cabin, oil dripping from fresh air breathers or oil mist on the valve covers and firewall?

[@trdscfjc]

Will this flow enough for a 632?

[@MEWagnerPerformance]

Thanks for your question and yes, we have had customers with large cubic inch engines use our valve before. That being said I'd like to know a little more about your application before I can make a definite recommendation. Can you email me at [e-mail] so we can discuss in more detail? Thanks, Matt Wagner M/E Wagner Performance Products

[@lit549]

Id be nice to put out a video on tuning it ..

[@dh66]

That was the tuning video. That's all there is to it i guess.

[@ScottDLR]

Umm....