Cooling Issue

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Dicer said:
Post #47 Went out and took some measurements yesterday. My WP pulley is about 6-7/8 OD and my cranks pulley is 6-1/2" OD, so obviously my WP pulley is larger than my crank pulley. I am done here..........
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That doesn't make it right. If you're not having issues its one thing, but it's not good to slow the pump down. In the 1980's it was cool because everyone was saving 9 HP.
 
red67gts said:
the water pump pulley is #3462825
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Thanks, I typed the wrong one.

What alternator are you using? Reason I ask is that right now I have an old single field w/ dual groove pulley. I'm using the rear groove now, but if I ran a shallower pulley like that 3462825, I'll have to move up the alternator a bit. Wondering how yours is set-up. Thanks.
 
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mopowers said:
Thanks, I typed the wrong one.

What alternator are you using? Reason I ask is that right now I have an old single field w/ dual groove pulley. I'm using the rear groove now, but if I ran a shallower pulley like that 3462825, I'll have to move up the alternator a bit. Wondering how yours is set-up. Thanks.
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I'll have to look at it tomorrow. I had to do a bunch of spacing to get my belts lined up because of the Fluidamper.
 
red67gts said:
the water pump pulley is #3462825
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yellow rose said:
I'll have to look at it tomorrow. I had to do a bunch of spacing to get my belts lined up because of the Fluidamper.
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So, after some searching, I can run a 2-1/8" deep w/p pulley and it'd line up with the front 7-1/4" power steering groove (not being used) on my existing crank pulley. After searching ebay, I see they've got 2-1/8" deep single water pump pulleys of the following OD's- 5-5/8", 6", 6-1/8", and 6-1/4". Which one would be best to run with a 7-1/4" crank pulley? Seems the 6" would result in a 20% over-driven water pump. Is that too much?
 
TrailBeast said:
I think you are going to have better luck with it now, as you would be surprised how much air comes off the tips of the fan.
With the fan deep inside the shroud all that air coming off the fan tips blows out against the inside of the shroud instead of out of it and therefore pulling more air volume through the radiator.
Was going to ask you about the depth and idle RPM's both. :D
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When I saw the first picture, and saw how close the fan was to the radiator, I was going to jump in and say that you want the fan blades about half in and half out of the shroud. It looks like you've done that, and I agree with Trailbeast in that your problem may be solved.
 
mopowers said:
Thanks, I typed the wrong one.

What alternator are you using? Reason I ask is that right now I have an old single field w/ dual groove pulley. I'm using the rear groove now, but if I ran a shallower pulley like that 3462825, I'll have to move up the alternator a bit. Wondering how yours is set-up. Thanks.
Click to expand...
I am running a powermaster double groove alternator. With the 3 groove crank pulley the alternator and ac compressor are running on the 2 inside grooves and water pump and power steering are running on the outside groove. Wish I was better with pictures
 
mopowers said:
So, after some searching, I can run a 2-1/8" deep w/p pulley and it'd line up with the front 7-1/4" power steering groove (not being used) on my existing crank pulley. After searching ebay, I see they've got 2-1/8" deep single water pump pulleys of the following OD's- 5-5/8", 6", 6-1/8", and 6-1/4". Which one would be best to run with a 7-1/4" crank pulley? Seems the 6" would result in a 20% over-driven water pump. Is that too much?
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The issue with water pump speed is the highest RPM you run. If you are below 7k you can run 20% over pretty easy. When the belt speed gets high it will toss the belt. You can help this by using a belt that is thinner than OE to make it fit further in the groove. Then it has more distance to climb before it can jump out of the pulley.

I'm getting about 17.5% with a 6 and a 7.25 but you should be golden.
 
mopowers said:
So, after some searching, I can run a 2-1/8" deep w/p pulley and it'd line up with the front 7-1/4" power steering groove (not being used) on my existing crank pulley. After searching ebay, I see they've got 2-1/8" deep single water pump pulleys of the following OD's- 5-5/8", 6", 6-1/8", and 6-1/4". Which one would be best to run with a 7-1/4" crank pulley? Seems the 6" would result in a 20% over-driven water pump. Is that too much?
Click to expand...
Got a link for those pulleys? I'm not seeing them.
 
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