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Franken Ford

Post  hank2531 on June 19th 2013, 12:55 pm

So I have built my creation. 1997 F-250 4x4, started just needing a tranny. Turned into a major overhaul. Rebuilt the stock 460, bored it .030" over 9.7:1 pistons, stock everything else in the block. The heads however are the dove 3 heads, the intake manifold is an Edlebrock performer 460, which I drilled and put bushings in to run the stock injectors. I built an adapter plate to accommodate the upper intake. The question that I have is; should I use the timing gear set that matches the model year of the truck or for the years of that match the heads? And would timing make the engine hesitate off the line, and sound as if it has an exhaust leak?

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Re: Franken Ford

Post  IDT-572 on June 19th 2013, 10:17 pm

The efi engines have the straight up timing chain in them from the factory........... You won't be able to tell the difference of the timing sets just listening to it. Look at the chain, the one you want has the tooth and dot directly over the key way.
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Re: Franken Ford

Post  Dave C. on June 20th 2013, 5:56 am

Tune on the accelerator pumps.

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Re: Franken Ford

Post  dfree383 on June 20th 2013, 6:10 am

Dave C. wrote:Tune on the accelerator pumps.
????
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Re: Franken Ford

Post  Dave C. on June 20th 2013, 6:34 am

Missed the efi part.EmbarassedEmbarassed

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Franken Ford

Post  hank2531 on June 25th 2013, 12:42 pm

Timing chain set is for the stock 1996-1997 460 with the timing mark directly above the key way for the crank gear. The timing for the 1996-1997 460 is 10 deg. before TDC. However the the heads being from an older vintage 1979-1987 460 the timing is different, those years it is 14 deg. before TDC. I am thinking maybe, I should get the timing gear set for the '79-'87 vintage instead.


Last edited by hank2531 on June 25th 2013, 12:42 pm; edited 1 time in total (Reason for editing : wrong title)

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Re: Franken Ford

Post  69F100 on June 25th 2013, 12:57 pm

hank2531 wrote:Timing chain set is for the stock 1996-1997 460 with the timing mark directly above the key way for the crank gear. The timing for the 1996-1997 460 is 10 deg. before TDC. However the the heads being from an older vintage 1979-1987 460 the timing is different, those years it is 14 deg. before TDC. I am thinking maybe, I should get the timing gear set for the '79-'87 vintage instead.

no stay with the 96-97 model the heads don't know what timing set you have in it .They 79-87 set is retarded 4* which will hurt some of your power
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Franken Ford

Post  hank2531 on June 26th 2013, 9:57 am

Okay, thanks for the info. I will keep the timing as is. With that part figured out, what then would cause a rough idle and hesitation off the line? I just replaced the fuel filter. I did plugs, wires, rotor cap and button, approx. 20,000mi. before the rebuild. Any ideas of what to check?

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Re: Franken Ford

Post  maverick on June 26th 2013, 10:27 am

Possible vacuum leak...could cause rough idle and lean stumble.
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Re: Franken Ford

Post  dfree383 on June 26th 2013, 10:29 am

hank2531 wrote:Okay, thanks for the info. I will keep the timing as is. With that part figured out, what then would cause a rough idle and hesitation off the line? I just replaced the fuel filter. I did plugs, wires, rotor cap and button, approx. 20,000mi. before the rebuild. Any ideas of what to check?

Check the Fuel Pressure and how old are your injectors? Have you ever replaced them or cleaned them? How old is your fuel pump?
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Franken Ford

Post  hank2531 on June 26th 2013, 12:40 pm

Is there a good test to check for a vacuum leak? Injectors are all original, truck has 98,000mi. on it, fuel pump was replaced 4 years ago. What should fuel pressure be?

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Re: Franken Ford

Post  dfree383 on June 26th 2013, 12:59 pm

Check into a ford service manual for the required pressure.

Cleaning the injectors might not be a bad Idea and also a 20k ago tune up on a 17 YO truck with 98k its probably time for another one, time kills stuff a lot worse than mileage. Especially with the typical parts store Replacement part quality.
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Re: Franken Ford

Post  IDT-572 on June 26th 2013, 2:08 pm

These trucks tend to have a small hesitation right off idle from the factory.
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Re: Franken Ford

Post  whitefield on June 27th 2013, 12:43 am

Intake gasket leak!

 Was the heads milled ?
 was the intake new or used ?
 check intake to port alignment
 Check vacuum hose routing
 Check vacuum
 check distributer phase
check and clean injectors
If you reused the factory throttle body check and clean it and the idle air bypass valve.
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Franken Ford

Post  hank2531 on June 28th 2013, 1:43 pm

The heads were not milled the valves, stems and seals were done, the intake is used, however it was inspected for cracks and any other type of damage. I am running the original throttle body, though and I didn't think to clean it, so I got to do that. Now distributor phase, what is it and how do you check it? Not to sound too much like an idiot, but I always thought that you set timing and then drop in the distributor.

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Re: Franken Ford

Post  IDT-572 on June 28th 2013, 2:05 pm

hank2531 wrote:The heads were not milled the valves, stems and seals were done, the intake is used, however it was inspected for cracks and any other type of damage. I am running the original throttle body, though and I didn't think to clean it, so I got to do that. Now distributor phase, what is it and how do you check it? Not to sound too much like an idiot, but I always thought that you set timing and then drop in the distributor.

That's involved quite a bit, it's checking the timing on each cylinder and tweaking the reluctor teeth to get every cylinder in time.

I don't think you have that problem. I have seen them off a good bit and no drive ability issues. Now hp drop has been seen.
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