351w timing
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Freshman User
Joined: Sep 2003
Posts: 37
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From: Chattanooga, TN
351w timing
I've got a truck that I bought with a mysterious 351w which was dropped in it. I ran the numbers off the block and it's out of a 1972 Gran Tarino. I know the guy put flat-top pistons in there, but that's all I know. I have installed holley throttle-body injection and am to the point where I need to check the timing.
My problem is that the guy did a serpentine conversion and I can't see or get to any sort of marks on the balancer. The engine runs decent, but has a hickup under load about 2400 rpm. How should I go about setting the timing?? What degrees should it theoretically be set at? I know you're not 'supposed' to go by ear or feel, but I think that's my only option. It's got a vacuum advance distributor and I'm running a MSD 6AL Offroad ignition.
Thanks in advance for any help!
My problem is that the guy did a serpentine conversion and I can't see or get to any sort of marks on the balancer. The engine runs decent, but has a hickup under load about 2400 rpm. How should I go about setting the timing?? What degrees should it theoretically be set at? I know you're not 'supposed' to go by ear or feel, but I think that's my only option. It's got a vacuum advance distributor and I'm running a MSD 6AL Offroad ignition.
Thanks in advance for any help!
FTE Legend
Joined: Jun 2006
Posts: 31,930
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From: Ottawa, Ontario
If the balancer is corroded you may need to hit it with a steel brush to clean it up and then highlight the timing marks with chalk or some such. But then, if the timing pointer is in the wrong place it may all be for not. You can verify by bringing the #1 cyl up to TDC, the balancer marks should then be under the timing pointer, if not, move the pointer.
Your stumble under load may not be timing related however, could simply be arcing between plug wires or some metal part. Be sure to keep wires seperated where they follow sequentially in the firing order, so cylinders 7&8 on the car/5.0 truck order, and 5&6 on the HO/351 order.
Your stumble under load may not be timing related however, could simply be arcing between plug wires or some metal part. Be sure to keep wires seperated where they follow sequentially in the firing order, so cylinders 7&8 on the car/5.0 truck order, and 5&6 on the HO/351 order.
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Freshman User
Joined: Sep 2003
Posts: 37
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From: Chattanooga, TN
Thanks for the tips! Part of it is getting the holley fuel injection dialed in, but it's odd how the engine chugs under load. Similar to if you were just letting on and off the throttle every second
