239 Ignition Timing
 

Hi,

I am trying to get my 239 OHV up and running. But the mechanic that is going to help me doesn't know anything about Y blocks.

He needs to know the following:

1) Cylinder locations 1-8
2) Cylinder locations on Distributor cap
3) Distirbutor rotation (CW or CCW)
4) Tune Up Specs (points gap, dwell gap, spark plug gap ect.)

And anything else that you think is important that I forgot.

Thank You,

These links I think are what you are looking for:

Flathead Tuneup Specifications for 1949-53 V8 (239 & 255)

https://www.ford-trucks.com/forums/1...ng-issues.html

http://www.ford-y-block.com/assemblyerrors.htm -more for rebuilds but good to know info

1950 Ford 239 Flathead V8 Engine Specs

ignition timing and vac advance 239 flathead - Hot Rod Forum : Hotrodders Bulletin Board


hope these help, good luck!

Sounds like a good mechanic, and I'm not being sarcastic. It is good that he asks these questions and does not make assumptions.

Cylinder numbering.
So we are on the same page, the water pump is the front, the flywheel is the back, the distributor is the right, the oil pump is the left.
On the right bank, numbered from front to back, 1, 2, 3, 4
On the left bank, numbered from front to back, 5, 6, 7, 8.

Firing order 1-5-4-8-6-3-7-2

The distributor cap probably has a 1 near one of the terminals and that is where #1 should be. From there, follow the firing order, counterclockwise.

I don't remember the tune up specs, but I believe that is typical of any points equipped v8.

For stock cams, valve clearance, .019". About 1/4 turn of the adjuster screw loose from 0 clearance will get you real close.

Stock cam valve clearance of .019" will work better :) .

Yes it will. I knew something wasn't right about that when I typed it. I'll correct it. Talk about a brain fart.

Recently I relayed a little formula provided by Ted Eaton on flywheel weight. Said a rule of thumb is 1 lb flywheel per 10 lbs. vehicular weight. Left out the second zero .

Here is an image that might be helpful.
It was from this thread: https://www.ford-trucks.com/forums/1...lp-please.html
https://www.ford-trucks.com/forums/a...1&d=1371840209

I'm currently putting together my 239 Y-Block. I'm an amateur so I'm going very slow and asking lots of questions. My thread is in my signature.

Here are the distributor specs from the shop manual:
http://i1225.photobucket.com/albums/...butorSpecs.jpg

Thank You, That is very helpful!!

I would recommend getting a shop manual... That is where Harrier got his page of info...

Harrier is rebuilding a '55 239... make sure the specs are the same for a 58, if that is what you are working on.

It's mentioned at the top of the image for 54-59 Ford and 55-57 T-bird

;)