300 timing

Reply Subscribe

Thread Tools

Search this Thread

Oct 26, 2010 | 08:06 AM

Blackwaterforge

Thread Starter

Senior User

Joined: Feb 2005

Posts: 468

Likes: 9

From: Alabama

300 timing

I have a 66 Ford F-250 with a 300 6 cyl, 4-speed and 4.10 gears.
I am having a hard time finding the correct timing so it doesn't ping going up hills. The truck runs strong has good compression (150 lb on all cylinders) and hold 50 lbs of oil pressure..
The engine is stock other than it has a Carter YF carburetor.

Oct 26, 2010 | 10:01 AM

parr4

Elder User

Joined: Dec 2000

Posts: 570

Likes: 1

From: Austin Texas (area)

You did not post which ignition system it has but when I had this 'pinging' problem I determined it was being caused by the weak springs in the distributor. Anytime above idle the weak springs caused the vacuum advance to fully advance the timing. That problem can be fixed by tuning the distributor, if you can find a distributor machine somewhere. I could not, so I disconnected the vacuum and fooled with the initial timing set. Settled for 10dg initial timing. It's been running like that for almost 250K miles on mechanical advance only...regular gas. Pinging is only a memory.

Oct 26, 2010 | 03:40 PM

Blackwaterforge

Thread Starter

Senior User

Joined: Feb 2005

Posts: 468

Likes: 9

From: Alabama

It has a stock dizzy with points (Dwell is 40 degrees).
I will try unhooking the vacuum advance and setting the initial timing at 10 degrees.
Thank You!

Oct 26, 2010 | 04:28 PM

parr4

Elder User

Joined: Dec 2000

Posts: 570

Likes: 1

From: Austin Texas (area)

Prolly won't work for you. My system is Duraspark2. The springs in your set-up should be correct, but tuning the distributor would most likely help.

Oct 26, 2010 | 05:58 PM

69 f-100 aman

Senior User

Joined: Aug 2009

Posts: 162

Likes: 0

From: Ocala,Florida

I have a new dist and a pertronic ignitor(that mean there is no points or cond in the distributor) that I'll sell to you,I put a mallory distributor and coil on mine. Let me know if you are interested. Dan

Oct 26, 2010 | 08:40 PM

Harte3

Postmaster

Joined: Dec 2006

Posts: 3,603

Likes: 10

From: Spokane, WA

Forget the arbitrary degree numbers and use a vacuum gauge to time it. Disconnect and plug the vac advance, hook a vacuum gauge to a full manifold vacuum source, turn the dizzy until the highest steady vacuum reading is found,back 1-2 hg from there. Adjust the idle mix and speed on the carburetor, reconnect the vac advance, drive and try. If it still pings, back off the dizzy 1 hg and try again. By using this method you will be adjusting the timing to what your engine likes.

Oct 27, 2010 | 12:58 AM

overlandexpress

Senior User

Joined: Jul 2009

Posts: 343

Likes: 4

From: Northwest

I would also install electronic ignition instead of points, I installed the pertronix II with a new matching coil and it smoothed my truck right out. It was a noticeable differance and worth the money. If you go with the pertronix system use the Pertronix II as they upgraded it so the system won't burn out if you leave the key on accidently.