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

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Old Apr 28, 2014 | 10:27 PM
  #871  
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Originally Posted by Rogue_Wulff
Dunno on that, but there are places that offer a later style comp designed to fit on the older style brackets. Look thru the 73-79 section, and I'm sure you'll find several links to them.
That's a possibility as well.
 
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Old Apr 28, 2014 | 10:34 PM
  #872  
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Originally Posted by Gary Lewis
That's a possibility as well.
I think both classic air and vintage air offer them. Not sure who else does, haven't been keeping up with it. Need to though, as I would like to update the comp on dad's truck.....
 
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Old Apr 28, 2014 | 11:01 PM
  #873  
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Sent both of them an email. We'll see.

Back on the alternator belts, Ford's parts catalog shows the alternator takes a 15/32" wide belt, which is .469", and the A/C compressor takes a 1/2". However, the Gates catalog (Navigates) says the alternator takes a .41" wide belt. I'll check tomorrow but when I compared them today the alternator belt was a lot smaller than the A/C belt. So, I'm betting that it is the .41" belt and the catalog should say 13/32".

I hope that is the case because I've found pulleys for the 3G alternator that have a .41" rear groove and a .500" front groove. But none with a .469" rear groove. However, I suppose I could turn the smaller groove into a larger groove on the lathe if needed.
 
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Old Apr 29, 2014 | 07:13 AM
  #874  
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Watch using different widths, it makes it very difficult to get things to match as the same width belt will ride at different heights making the effective diameters different.
 
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Old Apr 29, 2014 | 08:00 AM
  #875  
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That makes sense. However, I'm just planning on using a longer factory-width A/C belt to also turn the alternator. So I just need the longer belt and a pulley with the right width grooves. You would think that would be easy, but after posting the above I realized that Navigates says the Ford parts catalog is wrong on the width of all three belts but agrees with the lengths:
  • Alternator: Parts catalog says 15/32" but Gates says 13/32"
  • A/C: Parts catalog says 1/2" and Gates says 15/32"
  • PS: Parts catalog says 1/2" and Gates says 15/32"
I will check in a bit to see what sizes I have, but I'm
 
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Old Apr 29, 2014 | 09:39 AM
  #876  
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Gary, a lot of belts have gone metric, try finding the proper belts for a 1983 Craftsman GTV16, the originals were 5/8" wide which is 15.88mm, the replacements are either 16mm or 15.75mm. Since the system working correctly is very sensitive to belt width it becomes a royal PITA.

FWIW, 15/32 is roughly 12mm, 1/2" is 12.7mm, look at a good belt catalog for something maybe 12.5mm width.
 
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Old Apr 29, 2014 | 10:49 AM
  #877  
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Originally Posted by 85lebaront2
Gary, a lot of belts have gone metric, try finding the proper belts for a 1983 Craftsman GTV16, the originals were 5/8" wide which is 15.88mm, the replacements are either 16mm or 15.75mm. Since the system working correctly is very sensitive to belt width it becomes a royal PITA.

FWIW, 15/32 is roughly 12mm, 1/2" is 12.7mm, look at a good belt catalog for something maybe 12.5mm width.
I know we run into this quite often when trying to find replacement belts for the race car. Some times close enough is good enough but when spinning 6500-7000 RPMs it can get problematic.
 
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Old Apr 29, 2014 | 11:36 AM
  #878  
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Belt Sizes

Yes, things aren't completely straightforward in belt sizes anymore. Here's what I've found with respect to the original belts on Dad's truck. And note that the sizes shown in the Gates columns are what they quoted in the "Inch" column and their metric size converted to inches in the MM column.

Also, the belts I have, which are shown in "Actual", are very new and have the size plainly shown on them. And, in all cases the sizes are correct according to Goodyear's catalog. But yet the measured sizes don't match.




In any event, I think the belts I have will work fine. Here's a shot of how they fit into the crank pulley:




And, if you think the front one may sit too low, here's a shot down into the pulley:




So, I think all is well in spite of the all-over-the-map sizes the vendors give.
 
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Old Apr 30, 2014 | 01:10 PM
  #879  
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Well, there's been a diversion on the air conditioning compressor to a thread by that name. But, in doing that I also tried the Windsor power steering pump bracket, which is dramatically cleaner looking than the one that came on the M/400's. Here's a view of that, which shows a lot of promise, with the only thing needed to make it work being to drill and tap the stock A/C compressor bracket where the yellow circle is. Easy! It is absolutely amazing that the fore/aft distance is just right. Almost like it was meant to be.




Except, when you then add the exhaust manifolds and look at the back of the pump you see that the absolute most clearance you can get between the plastic pump body and the exhaust manifold is 1/2". And that's with the pump moved at the far extent of its travel. So, it doesn't look like I can use the Windsor bracket. But, that does mean I can still go look for a Saginaw pump and the associated brackets.

 
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Old Apr 30, 2014 | 03:23 PM
  #880  
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Well, let's revisit the power steering pump brackets. I've put the stock M/400 bracket and pump on and find the clearance to the exhaust to be essentially the same. However, that is if the standard belt is used on the stock bracket and a long belt used on the Windsor. Here are a couple of shots - Windsor on top and M/400 on the bottom. Basically, very little difference, although the M/400 could have more clearance if a longer belt were used.







And, here are front views. Is the cleaner look of the W bracket (cleaner in my opinion) worth the minimal hassle of drilling & tapping the stock M/400 mount to take the pivot bolt?













I grant that very few people are ever going to have the front view and mostly what will be seen is the last one. But, even then I think it is a cleaner look. However, I don't know what a Saginaw bracket and pump look like. Maybe they solve the problem? Anyone have shots of that arrangement?
 
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Old Apr 30, 2014 | 05:39 PM
  #881  
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What about the fuel pump and line?
 
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Old Apr 30, 2014 | 05:42 PM
  #882  
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What's the question? The pump that's on there is just for demo purposes. But are you suggesting the line might not fit with the Windsor power steering bracket?
 
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Old Apr 30, 2014 | 06:50 PM
  #883  
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Originally Posted by Gary Lewis
What's the question? The pump that's on there is just for demo purposes. But are you suggesting the line might not fit with the Windsor power steering bracket?
Basically. Or that the first bend might be too severe and restrict fuel.
 
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Old Apr 30, 2014 | 10:24 PM
  #884  
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I will check that out. Thanks.
 
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Old Apr 30, 2014 | 11:35 PM
  #885  
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Hi Gary.Great thread.Really great info.A few pages back you said that the DS type ign systems never had the small cap.IIRC,the DS1 did have the small cap.
Good luck.Have fun.Be safe.
Leo
 
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