swp water pump

[vmrod]

What is the difference between a corvette water pump and a SBC short style water pump? It looks like the bolt pattern and center guide are different. Are there other differences?

 

[Bob Chadwick]

I think the legs are different as well to accomodate the pulleys.

 

[yellow77]

I have an Edelbrock aluminum short leg pump and it fits my 350 and all the pulleys line up :confused

Cheers

Richard

 

[black_81_vette]

The main difference is the regular passenger car pump has a 5/8 inch shaft where the vette uses a 3/4 inch diameter shaft.

 

[vmrod]

The main difference is the regular passenger car pump has a 5/8 inch shaft where the vette uses a 3/4 inch diameter shaft.

That is kinda what I was thinking. I bought some SBC chrome pulleys for a short water pump. When I go to install it, I see the center hole needs to be larger. (drill, drill) That is done. Then I noticed that the bolt pattern was different. (drill, drill) Done.

I thought, if I was going to use an aftermarket pulley and modify it, why not just buy a new, chrome, short-style water pump (non-vette) and use a regular pulley?

 

[Bill75]

That is kinda what I was thinking. I bought some SBC chrome pulleys for a short water pump. When I go to install it, I see the center hole needs to be larger. (drill, drill) That is done. Then I noticed that the bolt pattern was different. (drill, drill) Done.

I thought, if I was going to use an aftermarket pulley and modify it, why not just buy a new, chrome, short-style water pump (non-vette) and use a regular pulley?

BEFORE you drill check the groove spacing!!!!!! I just bought a March pulley and just happened to spot the spacing on the "V" belts as looking a little different. I measured them and found them to be way different, they would never line up with the air cond/crank etc. stuff. March confirmed that in addition to the shaft dia. the spacing was different, they took it back.
Bill

 

[Jack]

SBC vette pump is a short pump CASTING ... but since about 1970 the sbc vette pump's hub is located slightly different from where a non-vette short pump's hub is ... hence pulley spacing is slightly different between non-vette & vette short pumps for sbc.
JACK:gap

 

[vmrod]

Thanks guys. I guess I'll keep the w.pump. If the hub is in a different location, that would mean that the fan would be in a different location. (don't want that)

I never looked into the 'groove thing' (hehe, sounds funny). I'll have to check it out. I already drilled the holes for the water pump pulley, so I hope it works out for me. However, that is not how my car-luck runs.