Topic: 65 Running Changes - Draft Tube Usage/Application Discussion

[carlite65]

NOTE: As of Oct 14, 2022 this thread is a merging of three earlier threads to collect and preserve the information contained in them in one thread
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i drug in a 65 2+2 yesterday. it is an A-code car. dso of st. louis build date of 30K. it has a road draft tube in the valve cover. not sure if this is the original engine. now my 65 289 build date 23K is a C-code but it has a pcv system. the dso on that one is louisville. both are dearborn cars. my question is why the later build would have a tube & not a pcv? was this possible?? i may consider switching it over to pcv depending on how it runs. this car will only ever be an occasional driver & not concours.......thoughts welcomed please.

[Richard P.]

I have worked on some cars produced in October of 1964 that had road draft tubes and others had PCV. I would look at the build date on the block to see how close it is to the build date on the warranty plate. This will help to determine if the engine has been changed. I looked in my 1965 Ford parts book and it states Tube Assy. Crankcase Ventilation (without emission reduction) part # C20Z-6758-A. The book has a January 1965 production date. Some things that Ford did didn't make sense.

[kutzoh]

Fred-
    I'm not sure what determined whether a car received a PVC or road draft tube but I believe they were both used simultaneously and quoting from Bob Mannel's book, "In 1964 these road draft systems were installed on some engines after about May 25, 1964" and later he adds "Stricter laws on smog control caused the road draft tubes to be phased out by about March 1965".    Hope this sheds a little light.

Greg

[carlite65]

i know they were both used at the same period.....wonder if the dso was a factor??

[CharlesTurner]

I had an October '64 Dearborn convertible, C code.  It had a road draft tube.

Have no idea what determined if a car had it or didn't. 

Personally, given the choice where either would be acceptable as "correct", I would have to go with a PCV system.  Road draft systems are notorious for causing sludge build up in a motor.

[livetoride60]

W/Manual
C5ZF-A
C5ZF-G W/Road draft tube which I wouldn't expect on an Oct car


W/Automatic
C5ZF-B
C5ZF-H W/Road draft tube which I wouldn't expect on an Oct car

So Jeff, was wanting to get more info on the above regarding road draft carbs on Oct 64 cars.  Is there a reason not to expect a road draft tube on an Oct 64 car...or did you mean Oct 65?  The poster's car is Oct 64.  If not, was this for non-hipos or just haven't seen many?

Reason I ask is my Oct 64 SJ hipo has the road draft carb (C5OF-L) and non-drilled carb spacer (i.e. no PCV), although the draft tube was missing when I got it.  Always assumed it was a road draft tube car due to carb and spacer.

Also know of other Oct 64 and later road draft tube cars.

pcv vs. road draft tube http://www.concoursmustang.com/forum/index.php?topic=1927.msg9829#msg9829

Thanks,
Rich

[PraireBronze]

Just to be clear, when I purchased my car in 1979, there were virtually no remnants of any original engine parts on the car, except for maybe the throttle linkage, motor mounts and PS system.  So I really have no idea if it was originally PCV or road draft.  It was PCV when I purchased the car and things I have read over the years led me to believe it was probably PCV originally, so that's the path I went with.  Plus the PCV setup works better.

[ChrisV289]

My car has a 29k build date and has PCV setup. Of course it has factory AC as well. Don't know if that factors in and it was also sent to DSO 71.

[markb0729]

My 65 Dearborn built Fastback has an approximate build date of September 2, 1964.  It has a PVC setup.  No draft tube.

[livetoride60]

Earliest C5OF-L tag I have is dated 4th week Aug 1964 and latest 2nd week Feb '65. If you have one outside of that range to share please let me know! The C4OF-AL (for PCV) was used from April '64 to March '65 you can see by the overlap between the two its not date specific to road draft versus PCV on the HiPo's but destination from my understanding.

I can beat that....my C5OF-L tag is dated 4FE, 5th week of June 1964.  It's on a C4OF-AL body (all C5OF-L's I've read about so far were on C4OF-AL bodies) and came with my San Jose K code with build date Oct 9, 1964.  Has all the correct internals. 

The DSO on the car is 61, Dallas.  Both the heads (July 64) and carb (June 64) are a little early for this car, so I suppose it is possible they were swapped sometime in the past.  I also know things were quite hectic at that time with production trying to keep up with demand, so could be original.  The block, intake, dampner, flywheel, radiator etc are all dated in the Aug - Oct 64 range.

Don't know if this helps with the PCV vs draft tube pattern.  There are multiple Oct 64 cars mentioned in thread below with draft tubes...

http://www.concoursmustang.com/forum/index.php?topic=1927.msg9829#msg9829

A Feb 6 build date K code out of Seattle (DSO 74) with road draft tube is mentioned here:

http://www.hipomustang.com/hpmx/viewtopic.php?f=8&t=1671&p=8605&hilit=draft+tube#p8605

Jeff, you may want to break this off into a seperate PCV vs draft tube thread.

Thanks,
Rich

[J_Speegle]

So Jeff, was wanting to get more info on the above regarding road draft carbs on Oct 64 cars.  Is there a reason not to expect a road draft tube on an Oct 64 car...or did you mean Oct 65?  The poster's car is Oct 64.  If not, was this for non-hipos or just haven't seen many?

Basically because I've seen a fair number of October 64 v8s without the draft tubes. Unfortunately in many of the pictures I have they do not show the area at the back of the passenger side valve cover - so many have the air cleaner blocking the clear view of that area. I do have examples also of draft tubes on cars into the 1700000 which seems odd to me also

But as the other thread reports - members have seen them both ways and I guess we're still at a lost as to why (if there is a reason or if its just to use up the earlier versions and move on to the improved)  one car one style while another got the other

[J_Speegle]

Going to try and merge the last half of this tread with the other thread on the subject

Reply #5 on is from a second thread that was merged with the earlier one

[suskeenwiske]

My current Dearborn Built '65, DSO 61, had its Engine stamped with an early December Date Code 4M7V, which I understand to mean December 4, 1964...it has a Road Draft Tube - surprised me when I first saw it.

I had another '65 6 Cylinder, DSO 31, built in the same month, but it had a PCV Valve. At the time, I didn't think anything of it as that is all I'd ever seen. Unfortunately, my photo record of that Engine is minimal so I have no good way to make any comparisons between the two that would give me an indication of why a Draft Tube on one and a PCV Valve on the other.

Maybe Ford found a pile of unused Draft Tubes and was just using them up or maybe they ran short on PCV Valves, or was there an Elevation above Sea Level Issue, or did Doc and Marty travel back to1964 and crash into the PCV Valve Factory...who knows.

Ray

[jwc66k]

DSO 61 is Dallas. You would have to determine what the vehicle code at that time required for Texas.
Jim

[J_Speegle]

Is there any rhyme or reason as to what cars came equipped with the down draft tube/ closed valve covers? My June 64' coupe has the downdraft pipe and front timing cover oil fill.

Would guess the DSO of the car makes the difference even in 64

NOTE - Split from another discussion