Technical Zip's Riser water pump info needed...

I picked up an early cast iron Zip's water pump riser and have a a few questions. I did a search but didn't find what I was looking for.

First, does anyone have the part number for the Chevy 6 water pump it is supposed to take? Is there more than one pump availalable? I'd like to run the cleanest looking one with out fittings for a heater, etc... I'm looking for part numbers or application please. I need to get one ordered ASAP.

Second, are these designed to work with the standard SBC short water pump pulleys? If not, then what pulleys do I need?

Thanks in advance.

 

Recommended pulleys are 3995642 (6-1/4") for the pump and 3850838 (7-1/4") for the crank. These are dual pulleys.

Regular old short pump single groove pulleys will fit too; but if I remember right the cast in alternator mounting uses the outer groove.

You can drill and tap the housing to use a Delco 10070107 bleeder as a alternative to the provided bleeder screw.

 

https://www.flowkoolerwaterpumps.com/store/Water Pumps-Chevy-CID: 250/4.1L/c21_27_100/index.html

flowcooler even mentions zips risers in their descriptions

 

Gates 42082

 

post pics of what you are installing this in

 

take a look at www.snowwhiteltd.com/products.html

 

This is what I use, a water pump for a 69 Nova ... 6 cylinder with no air conditioning.

Auto Zone sells a aluminum pump for the Nova application. The part number is BWP-386HDA .

As far as the pulleys they are as close as your local GM dealer.

Lower pulley Chevrolet # 3850838
Pump pulley # 3995642

Hope this helps. HRP

 

The Snow White uses a funky Opal water pump. HRP

 

Nice one! I see they also have a short water pump for the SBF, shortening the engine length by 2".

 

for top quality Opel water pump check out www.flowkoolerwaterpumps.com

 

Speedway also sells the short water pump pulleys in chrome for real cheap. In Canada, it was cheaper to get them from Speedway Motors than my local GM dealer.

Here is a link to the Zips instructions for installation including part numbers for pulleys etc:

https://static.speedwaymotors.com/pdf/910-2306.pdf

 

Awesome guys!
Thanks for all the replies and the help.

 

So the standard SBC V-8 short water pump pulleys work with the Zip riser and 6 cylinder water pump?
I have a stock 6 3/4" harmonic balancer.


Sent from my SM-G955U using The H.A.M.B. mobile app

 

They should if you use the pump with the 3-7/8 mount surface to hub face pump.
That instruction sheet is one of the better detailed ones I have seen.

 

Thanks for the info

Sent from my SM-G955U using The H.A.M.B. mobile app

 

I've done 2 Zips risers and used SBC short pump pulleys with no problems

 

What is the diameter of "regular old short pump single groove pulleys"? The sets I'm finding for single groove pulleys are not close to the recommended sizes from Zips, which are 2 grooves. I would like single.

 

I have been using the Zip's Risers on all my 32's and I have yet to find a single groove pulley that is the correct size, maybe a aftermarket aluminum one may be available, one thing is for sure.

Using a zips riser correctly and you will not have a overheating problem. HRP

 

Thank you. Aftermarket 7" aluminum is the closest I have found so far for the crank. There are aluminum 6.25" pump pulleys.
Are you using double groove on all your 32's?

 

Yes, a couple have had air and needed the double pulleys, several that I have built in the past didn't but I still used the OE pulleys, I figure Zip's did the R & D why not take advantage of their design work. HRP

 

Thank you for the information!

 

I run two groove steel pulleys because the single upper is larger in diameter. The two groove is smaller which allows the water pump to be over driven ( speeds it up at idle ) . Also so it doubles the belt to pulley contact area, Bill