emaxxer86

I had some 3.5” tubing left over from some side work I’ve done so I made a tube between the tb and MAF housing. I will be getting an AEM dryflow drop in filter next but here’s the tube so far. I need to weld on some fittings to attach the crank case vents from the valve covers. Obviously I still need hose couplers and clamps on the intake tube but here’s the start. I’ve been contemplating making a large catch can mounted outside the heat affect zone of the engine bay if you will. This way the oil vapors can condense into the catch can even in the summer months. I’ve also been thinking of routing the vacuum pump line to the catch can to help pull a vacuum on the crank case hopefully to reduce some pumping resistance in the engine and gain some power throughout the rpm range. I would use a y-block fitting to route back to the brake booster so everything still functions as it should. Sent from my iPhone using Tapatalk

Just about to install the airaid modular intake tube I ordered for my 2019 Silverado 1500 LD 4x4. This truck seriously impresses me with its power/torque and gas mileage. Next will be an AEM dryflow drop in filter and a catch can or possibly tap into the brake vacuum pump to pull a vacuum on the crank case to see if I can’t get a bit more out of her on the stock tune. Sent from my iPhone using Tapatalk

What is the purpose of deleting the vacuum pump? Why not use the vacuum pump to pull a vacuum on the crankcase to help all around power and torque? The higher the rpm the more pressure builds in the cc and with the vacuum pump pulling that pressure out, the piston can move more freely down the cylinder. Racing engines utilize this setup. I would imagine this helping power and torque throughout the rpm range very well. Just use a t fitting to connect the breather hoses from the valve covers, block off the pcv in the valley under the tb, then join the new line into the vacuum line from the vacuum pump. I would use a catch can with this setup though because you would be pulling more vapor out and accumulating more oil in the can. Sent from my iPhone using Tapatalk

So I will try to help here as I have been tuning using hptuners and see first hand results of using a sealed catch can, vented catch can or free air venting the cc, or utilizing the stock PCV system. Using a sealed can improves performance and longevity like a vented can does but still allows a slight amount of carbon buildup on the valves of a DI engine. I’ve seen the stock pcv system cause preignition due to carbon deposits on the spark plugs and combustion chamber. This obviously hurts gas mileage and performance. When venting the cc to atmosphere and giving the engine a nice treatment of seafoam, the preignition caused by the ingestion of oil vapors disappeared and performance returned. Using a sealed catch can is better than not using any sort of modification at all and worth it from my experiences. I’ve ran my cc vents to atmosphere on all of my vehicles since I’ve started tuning engines and I will continue to do so to keep engine cleanliness and longevity as long as possible. The only reason the OEM uses a pvc system is for emissions purposes and nothing more. If OEM would use some sort of small injector that soaks the intake valves periodically to clean them around service intervals (like the fuel injectors in port fuel injection engines use to do full time) this carbon buildup wouldn’t be an issue for the longevity of the valvetrain and engine performance for the most part. Venting the cc to atmosphere is second best to using a high volume vacuum pump pulling a vacuum on the cc at WOT not recirculating the oil vapor back into the intake tract. I work on race cars all the time and though the tech they use in most of them is nothing new, it’s because the EPA doesn’t care learn how to not hurt the performance of fossil fuel burning engines. I’ve seen engines without emissions equipment produce less harmful emissions than some bone stock vehicles with catalytic converters and a functioning pcv system. Downside to running the little pod filters off the valve covers is misting the top of the valve covers with oil vapor which will collect dust and make a mess with time. Also if you do this, there will be a vacuum leak and DTC if you don’t plug the little port going to the intake manifold from the pcv tube and venting the cc vent under the tb to atmosphere as well as the vents on the fronts of the valve covers. Sent from my iPhone using Tapatalk