The Ford Barn

cobbie · 12-14-2017, 01:57 PM

I am building a 8ba and was wondering on going with a stock road draft tube or trying a PVC valve. The engine is bored .125 over and has a 4"merc crank with Ross Pistons and a L-100 cam. It will not be a daily driver and I plan on changing the oil often.
I know a lot of you experienced Flathead Expert have already gone down this road and have some Ideas. I am thinking on staying with the old draft tube until some one can convince me otherwise. Thanks in advance and every one have a Merry Christmas !!

19Fordy · 12-14-2017, 03:33 PM

I prefer the draft tube scenario. Just shorten the oil fill/breather tube.

19Fordy · 12-14-2017, 03:34 PM

I prefer the draft tube scenario. Just shorten the oil fill/breather tube.

V8 Bob · 12-14-2017, 04:13 PM

Knowledge of what a pcv does (not pvc-that's pipe) and the advantages should be enough to "convince" you.

They've been around since the '40s, mandated in the early '60s.

fortyfords · 12-15-2017, 11:18 AM

My 8RT has the draft tube removed and the oil fill tube shortened, no vapors so no smell. It does have a PCV valve

Flathead Fever · 12-15-2017, 04:15 PM

Sponsored Links (Register now to hide all advertisements)

A PCV is far superior to a road draft tube at removing the blow-by that contaminates your oil. It also burns off those blow-by gases that would otherwise escape into the atmosphere through the road draft tube. For extending your engine's life the PCV valve is the best invention they ever came up with.

With that said I just think that old cars especially the restored cars should not be updated with modern technology. I like the look of the road draft tube anyway, especially chromed. I worked on modern emission systems for 30-years. Even helped write the test questions for California's certification tests for Smog Techs. You need to work on the new stuff to appreciate the simplicity of the old stuff. An engine without a single rubber vacuum hose is a beautiful thing!

cobbie · 12-17-2017, 01:36 PM

Thanks, every one for the comments, if I was going with a PVC valve who makes the right one that would work for a flathead using 3 carbs.

petehoovie · 12-17-2017, 02:49 PM

JAMCO > https://jamcosuspension.com/products...productID/1504

PCV4953
1949-53 FORD & MERCURY FLATHEAD PCV VALVE KIT

$39.95

1949-53 Ford and Mercury flathead V-8 PCV valve kit replaces the original vent tube with a modern "PCV" valve. It will eliminate blow by smoke and keep condensation out of the crankcase.

Robert Legner · 12-18-2017, 08:48 PM

When you use the PVC valve that uses the vacuum port for the windshield wiper it reduces the vacuum by a lot. The car runs better, at idle, with the road draft tube in place. That is my experience.

cobbie · 12-19-2017, 12:26 AM

Thanks for the info Robert other people suggested the same thing.

Fortunateson · 12-19-2017, 01:11 AM

I would keep the torque tube! LOL

12-14-2017, 01:57 PM	#1
cobbie Member Join Date: May 2010 Location: Bend, OR Posts: 82	Torque Tube or PVC Valve I am building a 8ba and was wondering on going with a stock road draft tube or trying a PVC valve. The engine is bored .125 over and has a 4"merc crank with Ross Pistons and a L-100 cam. It will not be a daily driver and I plan on changing the oil often. I know a lot of you experienced Flathead Expert have already gone down this road and have some Ideas. I am thinking on staying with the old draft tube until some one can convince me otherwise. Thanks in advance and every one have a Merry Christmas !!

12-14-2017, 03:34 PM	#3
19Fordy Senior Member Join Date: May 2010 Location: Coral Springs FL Posts: 10,925	Re: Torque Tube or PVC Valve I prefer the draft tube scenario. Just shorten the oil fill/breather tube.

12-14-2017, 04:13 PM	#4
V8 Bob Senior Member Join Date: May 2010 Location: Granger (Northern) Indiana Posts: 1,520	Re: Torque Tube or PVC Valve Knowledge of what a pcv does (not pvc-that's pipe) and the advantages should be enough to "convince" you. They've been around since the '40s, mandated in the early '60s.

12-15-2017, 04:15 PM	#6
Flathead Fever Senior Member Join Date: May 2010 Location: Yucaipa, CA Posts: 1,095	Re: Torque Tube or PVC Valve Sponsored Links (Register now to hide all advertisements) A PCV is far superior to a road draft tube at removing the blow-by that contaminates your oil. It also burns off those blow-by gases that would otherwise escape into the atmosphere through the road draft tube. For extending your engine's life the PCV valve is the best invention they ever came up with. With that said I just think that old cars especially the restored cars should not be updated with modern technology. I like the look of the road draft tube anyway, especially chromed. I worked on modern emission systems for 30-years. Even helped write the test questions for California's certification tests for Smog Techs. You need to work on the new stuff to appreciate the simplicity of the old stuff. An engine without a single rubber vacuum hose is a beautiful thing!

12-17-2017, 01:36 PM	#7
cobbie Member Join Date: May 2010 Location: Bend, OR Posts: 82	Re: Torque Tube or PVC Valve Thanks, every one for the comments, if I was going with a PVC valve who makes the right one that would work for a flathead using 3 carbs.

12-17-2017, 02:49 PM	#8
petehoovie Senior Member Join Date: May 2015 Posts: 8,081	Re: Torque Tube or PVC Valve JAMCO > https://jamcosuspension.com/products...productID/1504 PCV4953 1949-53 FORD & MERCURY FLATHEAD PCV VALVE KIT $39.95 1949-53 Ford and Mercury flathead V-8 PCV valve kit replaces the original vent tube with a modern "PCV" valve. It will eliminate blow by smoke and keep condensation out of the crankcase. __________________ The only thing nice about being imperfect is the joy it brings to others.... *"Silver rings, your butt! Them's washers!"* "We shot our way out of that town for a dollar's worth of steel holes!" - from 'The Wild Bunch' - 1969 https://www.youtube.com/watch?v=7NReUd2_0u0

12-18-2017, 08:48 PM	#9
Robert Legner Member Join Date: Nov 2010 Location: Odell, Illinois Posts: 50	Re: Torque Tube or PVC Valve When you use the PVC valve that uses the vacuum port for the windshield wiper it reduces the vacuum by a lot. The car runs better, at idle, with the road draft tube in place. That is my experience.

12-19-2017, 12:26 AM	#10
cobbie Member Join Date: May 2010 Location: Bend, OR Posts: 82	Re: Torque Tube or PVC Valve Thanks for the info Robert other people suggested the same thing.

12-19-2017, 01:11 AM	#11
Fortunateson Senior Member Join Date: Feb 2013 Posts: 511	Re: Torque Tube or PVC Valve I would keep the torque tube! LOL