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Old 01-09-2020, 10:18 PM
Whitepark Whitepark is offline
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Default Mann Hummel advice sought

I have a 416 LS3 in my Camaro. Dart block and heads, Holley throttle body injection - 600hp. Currently the engine vents into a firewall mounted catch can (see catch can beside a/c firewall lines), with vent hoses plumbed off the back of the thick spacers which sit between the engine block and valve covers on both banks, and thus both sides of the engine feed into the vented catch can - venting to the atmosphere.

I'd like to go to a Mann Hummel closed vent system, draining back into the sump and am seeking plumbing advice.

Is the plumbing as simple as taking the existing hoses from each bank and plumbing them into the Mann Hummel Pro Vent 200 can; plus routing the Mann Hummel drain vent into the LS3 sump?
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Last edited by Whitepark; 01-10-2020 at 12:06 AM.
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Old 01-13-2020, 12:46 AM
CarlC CarlC is offline
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The MH part, like the Provent 200, is meant to be used in-line with a PCV valve. Basically...

Drivers valve cover -- PCV--MH-- throttle body vacuum source.

Vacuum is needed for the drainback valve to actuate.
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Old 01-13-2020, 05:15 PM
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Quote:
Originally Posted by CarlC View Post
The MH part, like the Provent 200, is meant to be used in-line with a PCV valve. Basically...

Drivers valve cover -- PCV--MH-- throttle body vacuum source.

Vacuum is needed for the drainback valve to actuate.
That's great advice - thank you very much. I think I could plumb a PCV into my current drivers side hose take off, which goes from the spacer that sits between the engine block and the 'valve cover'; then feeds to the current catch can.

Do you think this PCV valve in line in the current drivers side hose would be ok?

https://www.amazon.com/Beck-Arnley-0.../dp/B000CB0X9K

Then out of the MH 200 and into a spare vacuum port on the 4150 Holley throttle body, plus a drain to the sump.

Image - drivers side take off from valve cover spacer
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Last edited by Whitepark; 01-13-2020 at 05:22 PM.
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Old 01-13-2020, 09:02 PM
CarlC CarlC is offline
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The pickup point being low like that will likely pull in excessive oil. The PCV system will be much more effective if the pickup point is higher up on the cover.

I'm not familiar with that PCV. I use a stock 4th gen with good results but the camshaft is relatively mild. M/E Wagner has an adjustable valve that may work well.
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Old 01-14-2020, 10:31 AM
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Ketzer Ketzer is offline
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I like how you did the steam tube! Very clean looking under the hood!
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Old 01-14-2020, 01:53 PM
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I like how you did the steam tube! Very clean looking under the hood!
Thanks. We were working on an OEM look under the hood.

Last edited by Whitepark; 01-14-2020 at 02:28 PM.
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Old 01-14-2020, 02:29 PM
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Quote:
Originally Posted by CarlC View Post
The pickup point being low like that will likely pull in excessive oil. The PCV system will be much more effective if the pickup point is higher up on the cover.

I'm not familiar with that PCV. I use a stock 4th gen with good results but the camshaft is relatively mild. M/E Wagner has an adjustable valve that may work well.
Thanks for the advice Carl. I like the idea of the adjustable M/E Wagner.
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Old 01-14-2020, 07:47 PM
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Killer looking engine bay! Love it!
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Old 01-14-2020, 08:33 PM
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Killer looking engine bay! Love it!
Thanks !
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Old 01-15-2020, 12:59 AM
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Check this out. It may help answer a lot of your questions about the oil pickup point vs. oil consumption. It's quite enlightening.

http://mewagner.com/?p=1221
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