PCV delete benefits?
PCV delete benefits?
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abrecos (07-11-2022)
05-04-2017, 05:50 PM
#4
Registered User
Thread Starter
10-26-2017, 07:15 AM
#8
Man would love to see the debate continue.
I went this route, hopefully no issues. On the admin intakes you have to either delete pcv or catch can. No hole in the intake for pcv tube thing so no choice.
This is is starting to look like the lightweight oem size crank pulley discussion.
Verdict seems to be 50/50, some people swear by it, some people avoid it.
So I guess my question is, would a catch can be better than the eps breather kit? Because I am forced to have one or the other.
I went this route, hopefully no issues. On the admin intakes you have to either delete pcv or catch can. No hole in the intake for pcv tube thing so no choice.
This is is starting to look like the lightweight oem size crank pulley discussion.
Verdict seems to be 50/50, some people swear by it, some people avoid it.
So I guess my question is, would a catch can be better than the eps breather kit? Because I am forced to have one or the other.
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abrecos (07-11-2022)
10-26-2017, 03:07 PM
#9
no blowbly in intake passage way... clean butterfly in throttle bodies, clean intakes manifolds. there aren't any cons of doing this. there are cons of not doing it. you won't get a check engine light. just make sure to cap off the vacuum ports. I went wit the admin tuning catch can though. because I chose to.
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abrecos (07-11-2022)
10-26-2017, 08:00 PM
#10
You should experience a slight power loss with the pcv delete. The pcv is routed to the intake (duh) which pulls a vacuum (slight) on the crankcase which lowers pumping loss. The bottom of the pistons are pumping crankase air when the engine runs. The pcv reduces the air volume thus the power used by the engine to push that air around.
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abrecos (07-11-2022)
10-27-2017, 09:04 AM
#11
You should experience a slight power loss with the pcv delete. The pcv is routed to the intake (duh) which pulls a vacuum (slight) on the crankcase which lowers pumping loss. The bottom of the pistons are pumping crankase air when the engine runs. The pcv reduces the air volume thus the power used by the engine to push that air around.
Not trying to loose power. Trying to least damage as possible to engine...
10-27-2017, 09:57 AM
#12
You should experience a slight power loss with the pcv delete. The pcv is routed to the intake (duh) which pulls a vacuum (slight) on the crankcase which lowers pumping loss. The bottom of the pistons are pumping crankase air when the engine runs. The pcv reduces the air volume thus the power used by the engine to push that air around.
I have dyno'd a lot of 370Z/G37 with both PCV hooked up and PCV not hooked up and the power difference is negligible at best.
Matter fact, a vented PCV solution will always be easier on the engine at high load (and more conducive to making more power) since crankcase pressure is vented through the breather ports on the valve cover, and there is no potential for restriction due to stuck or poorly functioning PCV valves, oil blowby from the crankcase potentially reducing octane of the fuel (yes, it does this), or flow restrictions due to the undersized hoses on the PCV valves.
10-27-2017, 04:54 PM
#14
The vacuum that the engine pulls, even at peak, is negligible when compared to the pressure in the crankcase. The amount of ring seal gained with such a small force of vacuum (-20inHg or so) is practically zero.
When looking at actual peak horsepower numbers, crankcase pressure should be relieved as quickly as possible to prevent overpressurizing the crankcase. This doesn't really happen on NA cars at low power levels anyways, but it explains why there is 0whp gain or lost when converting from closed to open PCV on your average everyday bolt on VQ.
I see you are in Houston, if you'd like to dyno your car with or without the PCV system hooked up at the dyno I use, I can show you in person.
When looking at actual peak horsepower numbers, crankcase pressure should be relieved as quickly as possible to prevent overpressurizing the crankcase. This doesn't really happen on NA cars at low power levels anyways, but it explains why there is 0whp gain or lost when converting from closed to open PCV on your average everyday bolt on VQ.
I see you are in Houston, if you'd like to dyno your car with or without the PCV system hooked up at the dyno I use, I can show you in person.
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abrecos (07-11-2022)
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abrecos (04-18-2019)