330md timimg
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330md timimg
i am dealing with a beast of a truck and i am at wits end . the story goes as such I have a 1972 f600 uhaul converted to a flatbed. the engine in it is a 1967 330md and matching 5speed tranny from a school bus the problem is noone can tell me the correct timing for this MONSTER I have been told 6.8.10;btdc can anyone help [ and dont say set by ear ]
Fleet Owner
Joined: Jun 1999
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From: Creedmoor, North Carolina
Ray, I think 6º is a starting point. There are better engine tuners here than me, but my understanding is, you get a base line and start moving up until it starts pining and then you back off. Someone will be here shortly with a better answer.
John
John
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Joined: Sep 2002
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From: grafton usa
Jowilker is right. The 1969 manual shows 12 degrees BTC on the 330MD (identification code C ) engine. Idle speed is 550 RPM with the high idle at 1200. Ford recommends that if "substandard" fuels are used, retard the timing to prevent detonation (not to exceed 2 degrees BTC). This engine has a 7.4:1 compression ratio. should make 17 inches of manifold vacuum (16 if it has a dual diaphram distributor.) Dwell should be 26-31 degrees. Point gap.017 Plug gap .028-.032. They rated this motor at a whopping 190 HP @4000 and 306 torque @ 2000 RPM.
The 330HD (code D ) - Everything is the same EXCEPT 6 degrees BTC and 2200 RPM on fast idle.
I don't know what the difference is between the 2 motors. Going through the book, the only differences I saw were minimal. It is strange that the 330MD spec shows 12 degrees when everything else is 6. (Exception being 477 and 534 @ 8 degrees.) 12 degrees seems kinda steep to me. Could it be a typo?? My gut says 6 gegrees.
Good luck!
The 330HD (code D ) - Everything is the same EXCEPT 6 degrees BTC and 2200 RPM on fast idle.
I don't know what the difference is between the 2 motors. Going through the book, the only differences I saw were minimal. It is strange that the 330MD spec shows 12 degrees when everything else is 6. (Exception being 477 and 534 @ 8 degrees.) 12 degrees seems kinda steep to me. Could it be a typo?? My gut says 6 gegrees.
Good luck!
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