8ba road draft tubes
 

Did the ford and or mercury flatheads have a road draft tube the has the big goose neck at the top and just go straight down? I am aware of the style that curves and runs beside the oil pan , If anyone has a picture of the straight down style that would be great. Thanks in advance guys, I log in just about every day to this site to enjoy all the information available, thanks again

Re: 8ba road draft tubes
 

No answers yet, so I'll take a whack at it. Every 8BA I have ever seen (and it's been quite a few) had the two piece tube that terminates going back along the oil pan. Have I seen 'em all? Nope. Perhaps the industrial engines or maybe the big trucks (COE?) had something different. Unless the lower tube segment has a definitive factory installed look, I'd bet it was some homemade replacement after someone lost the original bottom segment and replaced it with something they had on hand.

I base this on the experience I have had with altering the stock 8BA road draft system. A few years ago, I replaced the tall original oil filler tube with a neat shorter chrome plated one. It looked great, but all of a sudden, I was getting oil all over the top of the engine. Replacing it with a stock height (but chrome plated) filler tube and all was well. I think that if you seriously alter the system, it will not work as well as it should. I believe a straight down tube would change the flow significantly.

You should be using a PCV system anyway.

Re: 8ba road draft tubes
 

I’ll have a look at my 8RT tube tomorrow. I also have an 8RT tube that was modified by Marmon Herrington. It would have been too close to the differential, so a lick with a blue flame fixed that. Same blue flame made a relief in the splash pan to make room for said differential.

Re: 8ba road draft tubes
 

Thanks to all for your replys. Greatly appreciated. As I looked at the Van Pelt engines diagram it appears to look as if it only runs vertical. again thanks

Re: 8ba road draft tubes
 

On the 50 F1 pickup with 8BA the draft tube drops straight down at the front of the motor.

Unfortunately I'm out of town so I cant send a picture right now, but you can sort of see it here on this engine picture.

Kirk

Re: 8ba road draft tubes
 

https://www.fordbarn.com/forum/attac...4&d=1736271155


https://www.fordbarn.com/forum/attac...3&d=1736271155


https://assets.rebelmouse.io/media-l...pg?id=30890911


https://barnfinds.com/wp-content/upl...up-Photo-3.jpg

Re: 8ba road draft tubes
 

Mercury was different than Ford due to the cross member placement and rear sump set up. Ford was a center sump set up and the truck was the deep rear sump set up so there were differences.

Re: 8ba road draft tubes
 

1952 8RT road draft tube

Re: 8ba road draft tubes
 

Re: 8ba road draft tubes
 

My 52 Merc has the two piece draft tube but the lower piece of it has been riding in the trunk for the past ten years. It was separated when the engine was out back about 1980 and never got put back in place. I have good intentions of re-installing it one of these days.

Re: 8ba road draft tubes
 

That is interesting information. Very glad to see that they were available, I hope to be able to purchase a straight down draft tube from some seller. If any member would have one that they would sell please feel free to PM me.
Again thanks to great information that is available on this site, You all have a great day and a better tomorrow.

Re: 8ba road draft tubes
 

Saw this on sleaze bay this morning. i have no connection to it.

https://www.ebay.com/itm/35644952498...Bk9SR4zqxcGJZQ

Re: 8ba road draft tubes
 

Curious why you would want to stay with the road draft ventilation instead of installing a much improved PCV?

Delete

Re: 8ba road draft tubes
 

Dan in MI, thanks for the ebay find I will keep an eye on that item greatly appreciated

Re: 8ba road draft tubes
 

V8 Bob, I would agree with you on the delete, I have a unique project coming up in the near future that I want to have the look with the draft tube , But it will be non functional, I have made accommodations on the 8ba intake for the better PVC system, but I appreciate all the input that the ford Barn has to offer, I will continue to read all the great responses on the site everyday

Re: 8ba road draft tubes
 

I guess this shows what I know about trucks!:o

Re: 8ba road draft tubes
 

I mistakenly double entered my last post and tried to delete it. :o


Glad you're just using the road draft for looks. :)

Re: 8ba road draft tubes
 

error

Re: 8ba road draft tubes
 

[QUOTE I have a unique project coming up in the near future that I want to have the look with the draft tube , But it will be non functional, I have made accommodations on the 8ba intake for the better PVC system, /QUOTE]


I would like to know how you are doing this.

Re: 8ba road draft tubes
 

You should be using a PCV system anyway.[/QUOTE]

What about the flatheads before the road draft tube was incorporated?

Re: 8ba road draft tubes
 

I am only familiar with 8BA's. I do believe I have seen this issue with earlier engines addressed on this forum several times. As I remember, one of these solutions had some plumbing under the intake manifold.

Re: 8ba road draft tubes
 

Joe B, If i understand your your question correctly, I am building a 8ba engine that will be put into a case ingersol garden tractor, with the tin work of an B allis chalmers tractor, there is a guy in northern wisc that built one of these tractor, he was very generous to help me with the plans on doing this project, anyway I had a carb builder from texas bulid me a 3x2 intake with stromberg 97s and what he did was machine in a tap into the passage of the casting leading to the draft tube and that tap will be used to recirculate the PVC gases, and the road draft tube I will find something like a solid rubber ball or something like that and jam it into the draft tube to make the tube non function, and still keep the look of the tube intact, I hope I was able to answer the question, I wish i could install pictures on the site and I have tried in the past and I failed, Hope this make sense

Re: 8ba road draft tubes
 

Yes thanks.

Re: 8ba road draft tubes
 

What about the flatheads before the road draft tube was incorporated?[/QUOTE]


The first "road draft" system used on flathead V8s was introduced in 1935, exiting through a vent on the right front of the oil pan, and used until '49 when the external piping became production.



Flathead V8 PCV usage was actually started during W11 on some vehicles that had enclosed engines.

Re: 8ba road draft tubes
 

V8 Bob, I have a '51 canadian 8BA from an F1 truck with the 2 piece draft tube. Im installing the enigine into a custom build 'pre-war' re-creation that Im building.
Where I plan to race it is on a dry lake bed circuit called Lake Perkolilli in Western Australia and the Draft tube 'gases' wont be a problem here, but if I race it on a road circuit then Ill probably need a catch can or other option...
My questions are: How can I keep it looking like the Draft Tube is still original, but run the gases thru a catch can somehow? and is there a performance issue doing this, or is there another easy option...

Re: 8ba road draft tubes
 

Perhaps a better option would be to plug the end of the road draft tube, put an unobtrusive "tee" into it, and run a hose to a PCV valve exhausting into the intake manifold.