BOP Pulleys interchange with SBC?

[AuroraGirl]

So Im talking AC compressor, alternator(definitely, its the same pump just different bracketing), water pump, crankshaft, and alternator(fairly certain same, just different cases). Any others too.

I have BOP engines and my small block olds junkier-of-the-two has a 3 belt crank and 3 belt water pump pulley i would like for... research purposes.

 

[AuroraGirl]

there is also a small block pontiac with a 400.. but hood was a bitch and i didnt feel like fixing that

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[AuroraGirl]

bump

 

[Matt69olds]

Olds use a 4 bolt lower crank pulley. I’m not very familiar with the Chevy stuff, but I think all Chevy uses 3 bolts. As for the power steering pulley, the pumps will fit whatever mounting brackets you want to use, there isn’t such thing as a Chevy, Olds, whatever pump. The early pumps use a bolt on pulley with a key, the later pumps have pressed on pulleys. The early pumps also used flare fittings on the hoses, the later pumps used o-rings. Anyplace that makes hydraulic hoses will have fittings to make whatever hose you need. As for alternators, the pulleys are interchangeable, including the serpentine and old school v-belt. Just a matter of the right spacers.

There are countless varieties of water pump pulleys, I think they all share the same 4 bolt pattern, but one belt, 2,3, offsets, etc are all different. There is a 2 letter code stamped somewhere on the pulley. If someone has a parts book for whatever your working on, hopefully they can provide the pulley codes

 

[AuroraGirl]

Olds use a 4 bolt lower crank pulley. I’m not very familiar with the Chevy stuff, but I think all Chevy uses 3 bolts. As for the power steering pulley, the pumps will fit whatever mounting brackets you want to use, there isn’t such thing as a Chevy, Olds, whatever pump. The early pumps use a bolt on pulley with a key, the later pumps have pressed on pulleys. The early pumps also used flare fittings on the hoses, the later pumps used o-rings. Anyplace that makes hydraulic hoses will have fittings to make whatever hose you need. As for alternators, the pulleys are interchangeable, including the serpentine and old school v-belt. Just a matter of the right spacers.

There are countless varieties of water pump pulleys, I think they all share the same 4 bolt pattern, but one belt, 2,3, offsets, etc are all different. There is a 2 letter code stamped somewhere on the pulley. If someone has a parts book for whatever your working on, hopefully they can provide the pulley codes

awesome lots of info. the pump question should help a lot, because all my pumps are 1979 but post nut/key, then only 2 are o ring 1980-1996 style. but that helps know that on PS pump specific i have a **** load of pulleys i can work with.

On wp, that is great too. It means my olds wp pulleys are unlikely to be of any use atm, but never hurts to start a pile. WHat do you think about crank? Crankshaft Is where Im hoping but i guess doubtful at the same time. alternator, great to hear too.

 

[Matt69olds]

What exactly are you hoping to accomplish? Are you trying to adapt BOP stuff to a Chevy, or just trying to come up with a combination of parts that will work together? I have a few books that list pulley codes for Oldsmobile stuff with various options (with/without A/C, heavy duty cooling, etc). I’m sure there are parts books out there for ever GM make, it would help knowing what your goal is.

 

[AuroraGirl]

Mostly for my SBC without buying new ones. its just to change either where belts are or to add another. I have a 2 belt PS pump and i would like to run a redunant belt that is originally intended for ac but for me would allow 2 belts to turn, as well as my water pump so backup + more power reaches. or if i needed heavy charging, i have 2 2 belt alts
but to do ANYTHING i need 3 or 4 belt crank

 

[AuroraGirl]

What exactly are you hoping to accomplish? Are you trying to adapt BOP stuff to a Chevy, or just trying to come up with a combination of parts that will work together? I have a few books that list pulley codes for Oldsmobile stuff with various options (with/without A/C, heavy duty cooling, etc). I’m sure there are parts books out there for ever GM make, it would help knowing what your goal is.

And it just happens about half of my available pulleys on proeprty are BOP, mostly olds, some pontiac, and some buick but i wont touch those simply because its a running car

 

[Matt69olds]

All Olds use a 4 bolt crank pulley. I’m pretty sure all Chevy use 3 bolts. Olds do use a 3 belt lower pulley for the A/C cars, I have no clue about the Chevy stuff.

I don’t think it’s a good idea to use 2 belts to drive the exact same accessories. The odds that you can find 2 belts exactly the same length, and then stretch at exactly the same rate seems pretty remote. I imagine you would be fighting one belt always being loose. With the Olds setup, the A/C is the single belt. There are 2belts that drive the water pump. One belt goes around the crank, power steering, and water pump. The other belt is crank, power steering, water pump and alternator. If your thrifty with electrical accessories, a fully charged battery will keep an engine going all day if you don’t shut it off. No water pump? The engine would overheat in minutes without a belt.

 

[AuroraGirl]

I thought I recall some setups had factory 2 belts running to PS pump despite no AC?
Either way, I would still want the crank and waterpump to be 2 belt, at the very worst the slippage off the wp for ps would be less likely if the wp itself is stout in tension

i also have an auxillary hydraulic pump coming, which needs a belt

 

[AuroraGirl]

this is what i meant @Matt69olds about more than one drive off 1 belt, three pulleys turning different speeds

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[SquareRoot]

Holley makes an awesome drive kit for the LS. You know where in going with this.

 

[AuroraGirl]

Holley makes an awesome drive kit for the LS. You know where in going with this.

no, please expand. im not sure what you mean. I havent the faintest idea

 

[Matt69olds]

I get the feeling someone is suggesting a LS swap.


Maybe there are applications with 2 belts driving the same accessories. If so, obviously it can be made to work. Now that I think about it, I have seen electric motors on air compressors and other industrial uses with multiple belts.

I guess the place to start would be to get your auxiliary pump mounted, then go thru your collection of pulleys. Hopefully you can come up with a combination that fit, or could be shimmed to line up.

How did the hydraulic pump for tow trucks mount? What did they use for hydraulic power on dump trucks? Maybe the solution to what your trying to do is already out there. No need to reinvent the wheel.

 

[AuroraGirl]

I get the feeling someone is suggesting a LS swap.


Maybe there are applications with 2 belts driving the same accessories. If so, obviously it can be made to work. Now that I think about it, I have seen electric motors on air compressors and other industrial uses with multiple belts.

I guess the place to start would be to get your auxiliary pump mounted, then go thru your collection of pulleys. Hopefully you can come up with a combination that fit, or could be shimmed to line up.

How did the hydraulic pump for tow trucks mount? What did they use for hydraulic power on dump trucks? Maybe the solution to what your trying to do is already out there. No need to reinvent the wheel.

I have decided on a muncie clutch pump that has brackets and everything.

but on pulleys, i meant to show it wraps around more than one accessory, but in varying lengths