Removing plenum PCV tube Help?
Melting Slicks
Joined: Nov 2012
Posts: 3,163
Likes: 686
From: SUFFIELD CONNECTICUT
Cut it off short as possible and leave the same angle cut on the end that exits there now. No issues and you will not disturb the pcv function.
Pro
Joined: Nov 2013
Posts: 693
Likes: 158
From: Milwaukee WI
Apparently some have no confidence in the flow testing and computer simulation GM did for development of the potent LT1 engines; but they may stick a hose barb in the intake runner ahead of the valve body which has not been flow tested in any way.
Last edited by vettetwo; Oct 3, 2017 at 08:31 AM.
Melting Slicks
Joined: Nov 2012
Posts: 3,163
Likes: 686
From: SUFFIELD CONNECTICUT
Every production vehicle is built with compromises, GM, Ford, Dodge, no one blue prints for max performance. That's why every car responds to mod's. Doing things the OE manufacturer cannot due to compromise and to satisfy the masses and regulations.
Thread Starter
Drifting
Joined: Jun 2008
Posts: 1,365
Likes: 364
From: California
Looks like it could or would compromise performance and would think by removing it would be a benefit, I have yet to see if anyone has done it and ran a better time MPH 60' and time.
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Melting Slicks
Joined: Nov 2012
Posts: 3,163
Likes: 686
From: SUFFIELD CONNECTICUT
Because its done in conjunction with other mods like removing the intake and smoothing any rough castings in each runner, smoothing the throttle body opening on the intake, smoothing the rough casting lip on the throttle body itself, reducing the length of the pcv tube , all in search of a little better flow to work with a AFE intake, and a borla mid pipe. Easier in, easier out maybe good for 10 to 15 hp. I have done just that along with lower water temps and a big effort in cooling the entire intake path to get 430 rear wheel hp on a fully heat soaked engine compartment dyno pull, which is a realistic conservative 485 hp versus 460 stock. The dyno graph also showed gains as low as 2500 rpm, nothing in the middle and gains from 5000 to 6000 rpm and less of a drop after 6000 rpm. Win, win.