400 pulleys

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Apr 26, 2007 | 05:57 PM

whitie's

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400 pulleys

Hey everyone,

ok here is what I have done.

I have a 78 400 that I put into my 60 ford panel. But I took off the power steerinf and the air compressor and got rid of them without thinking that the waterpump now does not have a belt to turn it. I know that march sells a v belt system that would work but I do not want to spend $200 on a set of pulleys and that be the only chrome stuff on my engine. I am not looking to dress it up actually dress it down. so if anyone has any suggestions or things they have done please let me know.

By the way problem I know of already. Because the crank pully is 8" and the waterpump pully is 6 1/4" I they will now fit even if I modify the waterpump pulley to line up. so what to do???

thanks

Apr 26, 2007 | 07:16 PM

danlee

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It's been so long since I've looked at a stock pulley setup, I am not sure anymore, but doesn't your crank pulley line up with your waterpump and alternator. The PS pump and air comp line up directly with another groove on the crank pulley. You just use the one belt.

Apr 26, 2007 | 08:42 PM

Torque1st

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Just move pulleys and use a single belt on the crank/w-pump/alternator.

Apr 26, 2007 | 10:56 PM

whitie's

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which pulleys do I move? here is the way it is set up now. the alternator is on the front grove on the crank pulley. There are 4 grooves on the crank pulley. The stock water pump pulley lines up with the third groove. that is the only place that it fits becuase the crank pulley is 8" in diameter and the waterpump pulley is 6 1/4" so the do not fit one above the other? is there anyway to move the alternator over to the other side? I would just move the pulley if I knew where to move them.

Apr 27, 2007 | 12:26 AM

Torque1st

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Modify the alternator brackets so the alternator lines up with the water pump. This requires fabrication but if you are doing custom work fabrication is the name of the game. I have fabricated brackets and modified others to move parts from one side of the engine to another, up and down, and in and out. Just watch your pulley ratios and belt widths.

Apr 27, 2007 | 03:29 AM

whitie's

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thanks will give it a try

Apr 27, 2007 | 04:45 AM

Torque1st

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Check a few other like engines in cars and trucks and you may even come up with a better set of pulleys and brackets, maybe a slightly smaller WP pulley. Even an alternator bracket ready made. Plus it is always great to have "pieces parts" when fabricating. You may be able to remove some of the extra crank pulleys or find another set without extra grooves.

When checking belt speeds and RPM on various shafts remember:
Circumference=3.1416 * Pulley diameter.
Pulley diameter is the close to the outer diameter where the belt rides.
Belt lengths are just the circumference of the belt and are usually specified in the part number either in inches or MM. 1"=2.54MM
http://www.unitsconverter.net/
Whatever you do write down the belt length so you don't loose it. Write down the original pulley diameters so that if something runs too slow or fast you have a baseline reference to work from to correct the problem. I find that writing down ALL alterations and specifications in a small notebook kept in the glove compartment will help you down the road AND the next owner.