The title says it all..I asked this in another thread, but maybe it was too Mopar-specific. I didn't get but one opinion. This is on a big-block Mopar, but would apply to other engines: To get my 383 into my '38 Chrysler it would sure make my life simpler if I could run a single v-belt from the Crank around the alt, and up to a double groove pulley on the water pump. Then I'd run another belt from the w/p directly 'round the power steering pump, but not around the crank at all. I've never seen it done this way, but would it work?? Here's the patient, the leather strip is to help me visualize the belt. Obviously I don't yet have the 2-groove w/p pulley:
I would think the pressure of the p/s pump would cause the water pump pulley to slip, but I don't know I've never tried it or even seen it done.
You could. It would have the alternator belt doing all of the work driving the water pump, alternator and power steering pump. How about running the power steering pump around both the crank and water pump. Then both belts would be driving the water pump. The water pump isn't so hard to drive but the fan takes some horsepower.
He has the belt on the crank pulley. Don't know why it wouldn't work if the belt cleared the W/P pulley.
Looks like you're actually avoiding the water pump pulley. You have enough room to install a doubble pulley and use the crank and water pump, and that's what I'd do.
I'm getting a 2-groove w/p pulley- it is on the way. That is what I'm hoping to run the p/s pump off of. Direct from crank to p/s won't work once the p/s pump is in its final position- it has to be up a couple inches from where it is in the pic. In the pic it is actually resting on the control arm pivot.
I'm guessing with the frame and brake line there's a clearance issue, and he wants to add a double pulley on the water pump to run a belt from the p/s pump to the water pump only, without running it off the crank pulley.
Once the p/s pump is in its real, higher position this might work (though I might have to trim back the frame some more where the lower run of the p/s belt will be very close depending on the angle. Another complication I just thought of: The 2 grooves on the crank pulley are different diameters, so the 2 belts couldn't both wrap the w/p pulley could they?
I agree with 1971BB427. Otherwise, you may have to go with a smaller pulley on the ps. This means a overdriven ps pump. Okay if you keep it under a certain rpm. About 7% smaller is all I'd go on the ps pulley. I did it on a sbf and got a Saginaw engineer's blessing as long as the engine didn't exceed 5600 rpm. Seems to work fine. This was a serpentine belt engine I converted to vee belts. No squeals, vibrations, or belt bouncing. See pix.
This is correct. The brake line is getting moved anyway, but I'd rather not cut the frame again to get belt clearance if I don't have to.
I just realized: I might be able to get some space by running the alt by itself (without the water pump) off the front groove of the crank pulley (the alt has 2 grooves), and run the other belt from the back groove (smaller diameter) of the crank pulley around the w/p and p/s pump. Now I've gotta run back out to the garage with my string...
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