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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

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  #31  
Old 08-27-2014, 10:51 AM
1986F150six 1986F150six is offline
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Well, the good news is that the vacuum canister on the distributor currently in my truck is, indeed, adjustable with an 1/8" allen wrench.

Perhaps the reason the numbers do not match up with the 1982 date, which I provided to Gary, is that when initially converting to Duraspark, the salvage yard, where I purchased the distributor, said the donor vehicle was a 1982 [maybe it was 1981 or 1983?].
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  #32  
Old 08-27-2014, 11:00 AM
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Yes, as said just now in the PM, I forgot that the truck is an 86. But I'd bet that the extra dizzy you have is an 81 version as the number matches perfectly to the parts catalog. (Not that I'll fight to defend the parts catalog, but on Calibration Codes it probably had to be accurate.)

So, we have two adjustable vacuum advance units (cans ). That's good as we may find the one in use now won't give as much advance as the engine wants, so it is good to have options. IIRC we can cut the stop on those to allow more advance if needed.
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  #33  
Old 08-27-2014, 11:06 AM
1986F150six 1986F150six is offline
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I just love it when a plan comes together!
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  #34  
Old 08-27-2014, 11:57 AM
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Crane advance units use a 3/32 long shank allen wrench.
If stock units are already adjustable there's no need to order a new one.
I'd still be interested to see if a Crane can will fit an I-6 distributor.
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  #35  
Old 08-27-2014, 12:02 PM
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We will check when David's here to see if my Crane unit will fit, just for reference and future use. I guess I need to start creating the to-do list in Evernote or I'll forget that bit. In fact, it would probably be a good idea to post it here so's y'all can help flesh it out and re-order it.
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Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads, Weiand intake, Street Demon 750/ZF5/3.50 gears w/Kevlar clutches
1969 Super Bee awaiting restoration
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  #36  
Old 09-01-2014, 10:08 AM
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Look at the tags on this thread, it's an example of why I delete many of them:

http://www.ford-trucks.com/forums/10...how-to-11.html
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  #37  
Old 09-01-2014, 10:30 AM
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I only see one: I6 distributor rotation. And we did discuss that. What am I missing?
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Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads, Weiand intake, Street Demon 750/ZF5/3.50 gears w/Kevlar clutches
1969 Super Bee awaiting restoration
1950 Chevy 3100 in queue
Worst fear: I die and my wife sells my rides for what I've told her I have in them.
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  #38  
Old 09-01-2014, 11:52 AM
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Quote:
Originally Posted by Gary Lewis View Post
I only see one: I6 distributor rotation. And we did discuss that. What am I missing?
You are somehow missing this, I'm guessing you're not looking at the thread I pointed out?


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1986, 460, conversion, duraspark, f150, flathead, ford, georgia, i6, ii, parts, picture, plugs, spark, upgrade, vacuum



http://www.ford-trucks.com/forums/10...how-to-11.html
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  #39  
Old 09-01-2014, 03:09 PM
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Missed the link on this phone. Obviously those tags are mainly worthless.
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Rusty: '81 F150 Ranger XLT 4x4 w/a 351M, RV cam, Performer carb & intake, C6, & 3.50's
Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads, Weiand intake, Street Demon 750/ZF5/3.50 gears w/Kevlar clutches
1969 Super Bee awaiting restoration
1950 Chevy 3100 in queue
Worst fear: I die and my wife sells my rides for what I've told her I have in them.
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  #40  
Old 09-01-2014, 04:01 PM
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Quote:
Originally Posted by 1986F150six View Post
What I did find interesting is that 2 canisters for the 4.9L and 1 for the 351 indicated that "Advance starts @ 5" Hg". If you recall in a recent thread where I was discussing that I had measured the vacuum of the sole carburetor vacuum port [using 1970 Carter YF] and it was 5" Hg @ idle, but never exceeded 10-11".
FWIW, I've just bought a new vac advance for my truck (V8) through Rockauto which also specified 'advance starts at 5" vacuum'.

I plugged a gauge onto it & applied vacuum; full advance was in by 9" Hg....+ or - depending on adjustment.
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  #41  
Old 09-01-2014, 06:04 PM
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So, when we map the curve on David's vacuum advance we shouldn't be surprised if it is all in by 10". And, we should map the vacuum at the port on the carb to manifold vacuum.

But, did yours actually start at 5" Ken?
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Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads, Weiand intake, Street Demon 750/ZF5/3.50 gears w/Kevlar clutches
1969 Super Bee awaiting restoration
1950 Chevy 3100 in queue
Worst fear: I die and my wife sells my rides for what I've told her I have in them.
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  #42  
Old 09-02-2014, 05:13 AM
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I don't remember, Gary.....I'll look again tomorrow.

At the time, I was just checking that it was fully advancing below idle vacuum.
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  #43  
Old 09-02-2014, 09:14 AM
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Not to worry, Ken. We will map his and know for sure.
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Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads, Weiand intake, Street Demon 750/ZF5/3.50 gears w/Kevlar clutches
1969 Super Bee awaiting restoration
1950 Chevy 3100 in queue
Worst fear: I die and my wife sells my rides for what I've told her I have in them.
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  #44  
Old 09-02-2014, 09:19 AM
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The arm is not truly tangential.
I'd imagine the action is not linear either.
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  #45  
Old 09-02-2014, 09:45 AM
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My first thought was to map the actual travel of the arm vs vacuum, but then I realized that it doesn't matter as it might not be linear. And your observation explains why. So we will just use my Mityvac and map it every 1" of vacuum, but will tee the vacuum gauge on my diagnostic machine in as it is much larger and reading it will be a lot easier.
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Rusty: '81 F150 Ranger XLT 4x4 w/a 351M, RV cam, Performer carb & intake, C6, & 3.50's
Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads, Weiand intake, Street Demon 750/ZF5/3.50 gears w/Kevlar clutches
1969 Super Bee awaiting restoration
1950 Chevy 3100 in queue
Worst fear: I die and my wife sells my rides for what I've told her I have in them.
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Old 09-02-2014, 09:45 AM
 
 
 
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