External PCV too much vacuum?

[Stevo585]

Has anyone tried these pcv valves from radium?

10AN ORB PCV Valves

Billet 10AN ORB PCV Valves

www.radiumauto.com

Good time to update!

I actually am using the radium PCV i ditched the 2jz pcv. I found out even running 6an the lines were too big and I was still sucking oil into my intake.

(Head ports are plugged)

Current set up:
Low side: radium 10orb to 6an PCV to a 90 6an to npt adapter with a 1/4 npt push lock fitting with 1/4 air hose —> in catch can with 6an npt adapter with another npt push lock —> out catch can 6an 90 adapter with push lock into the 6 an with a push lock on my intake manifold.

High side: running oem flapper with a filter VTA

I’ll probably end up using the port on the head to use the VTT vac relief valve for a cleaner looking set up, but for now this works!

Let me know if you want me to add some pictures.

 

[BEAT_ITN54]

I think most people go with 8AN or larger lines which are too big (in my opinion) for the system. I recently did my install using Radium cans, VTT VC fitting, VTT mini check ,6AN hoses on the low side and 10AN on the high side with the OEM flapper valve. With the engine idling and the dipstick from the low side can removed there is a very strong vacuum (in the can) which suggests that the vacuum pull is more than enough to evacuate the crankcase during low load conditions. To date I have not gotten a single code nor drop of oil in the system.

Ya most people go over kill and then have problems that they chase or revert back to stock. Vacuum source line should only be around 5/16 I'd.

 

[Smokeuuu]

Good time to update!

I actually am using the radium PCV i ditched the 2jz pcv. I found out even running 6an the lines were too big and I was still sucking oil into my intake.

(Head ports are plugged)

Current set up:
Low side: radium 10orb to 6an PCV to a 90 6an to npt adapter with a 1/4 npt push lock fitting with 1/4 air hose —> in catch can with 6an npt adapter with another npt push lock —> out catch can 6an 90 adapter with push lock into the 6 an with a push lock on my intake manifold.

High side: running oem flapper with a filter VTA

I’ll probably end up using the port on the head to use the VTT vac relief valve for a cleaner looking set up, but for now this works!

Let me know if you want me to add some pictures.

@Stevo585 Yeah pictures would be great

 

[ShocknAwe]

Pretty interested in the radium valve. The note of "vac leak at low throttle" is of particular interest

 

[billj457]

I've previously come to the same conclusion, the VTT low side -8 AN is way too big and pulls too much vacuum, so much that you could hear the whistling as the air was getting sucked past the seals! I had to revert back to the OEM low side while I figured out my next steps. The Radium PCV seems to be a better approach vs a check valve b/w the catch can and TB, I also ordered one and will be revisiting my low side, this time with plugged head ports, 5/16" hoses, and the Radium PCV.

 

[billj457]

I've previously come to the same conclusion, the VTT low side -8 AN is way too big and pulls too much vacuum, so much that you could hear the whistling as the air was getting sucked past the seals! I had to revert back to the OEM low side while I figured out my next steps. The Radium PCV seems to be a better approach vs a check valve b/w the catch can and TB, I also ordered one and will be revisiting my low side, this time with plugged head ports, 5/16" hoses, and the Radium PCV.

Just to circle back, the Radium PCV is a really nice piece. After plugging my head ports, I reinstalled my low-side OCC. After getting my VTT vacuum relief valve adjusted, all is great. All was not great, lol. My final setup:

Low Side
VTT PCV Delete -> 8AN to 5/16" adapter -> 5/16" hose -> 5/16" to 8AN adapter -> VTT OCC -> Radium PCV (6AN) -> Test Port* -> Ball Valve* -> 6AN to 5/16" 45* adapter -> 5/16" hose -> BMS VTT TB fitting

High Side
OEM Flapper -> 10AN hose -> VTT OCC -> 10AN hose -> Rear Inlet heater fitting

 

[billj457]

I was still getting random 2D2E errors and tracked it down to my low side PCV setup. After some refactoring, I'm very happy with it now! My setup no longer needs to use a vacuum relief valve, instead I'm using a ball valve between my BMS TB adapter (I had a feeling the VTT one was leaking) and the Radium PCV. I also added a test port on the PCV side of the ball valve to use with a gauge to dial in ~2 in Hg. So far no 2D2E, and also no whistling seals.

 

[Indy135i]

Im about the pull the trigger on a radium pcv to match to my new radium cans. What check valve did you go with? I assume by ball valve you mean check valve.

Edit, nvm I see what you mean now. You’re using a ball valve to control vacuum flow to the pcv. Think I’ll follow suit and run similar right at the TB fitting. This looks like a nice and compact option for the task.

Whoops, we couldn't find that.

 

[billj457]

Im about the pull the trigger on a radium pcv to match to my new radium cans. What check valve did you go with? I assume by ball valve you mean check valve.

Edit, nvm I see what you mean now. You’re using a ball valve to control vacuum flow to the pcv. Think I’ll follow suit and run similar right at the TB fitting. This looks like a nice and compact option for the task.

https://www.grainger.com/product/36...FFofAN-TsW7Lc3D_U-YaAp-zEALw_wcB&gclsrc=aw.ds

Exactly, I have mine right before the PCV but anywhere between the TB and PCV would work. I went with an Earl's Ultrapro model and although it was more than I wanted to spend, it's really nice and compact plus it allows you to dial in the exact amount of vacuum without any hassle.

 

[Indy135i]

Exactly, I have mine right before the PCV but anywhere between the TB and PCV would work. I went with an Earl's Ultrapro model and although it was more than I wanted to spend, it's really nice and compact plus it allows you to dial in the exact amount of vacuum without any hassle.

Nice, that’s a really nice piece but the cost is indeed high and adds two more AN fittings to the run. I think I’ll go with the flow control valve from granger since I already have to adapt from NPT to AN. I’ll just plug the valve right into the TB then come off of the valve with NPT->AN

 

[Indy135i]

Just stumbled upon what I think will be an even cleaner option for restricting the 6an lines.

Adjustable PCV Restrictor Valve, -6AN

Adjustable PCV restrictor with 5 pre-drilled restrictor plate sizes. Replace your traditional PCV valve with an adjustable restrictor for better reliability and increased crankcase vacuum. Allows fine tuning the PCV airflow in your engine. No moving parts for improved durability. Perfect for LS...

www.improvedracing.com