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Reduction Pulley Combo for Small Block Chevy Long Pump

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Reduction Pulley Combo for Small Block Chevy Long Pump

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Please NOTE the following about this product:

  • This item is sold as a kit.

Details

Reviews

Q & A

What's in the Box

Combo includes cast aluminum double-groove aluminum water pump pulley, crank pulley, and matched pair of heavy duty belts. Slows water pump speed by 20% for increased horsepower.

For Small Block Chevy V8s with '69-'86 long style water pumps with 5/8" shaft.

Note: The lower crank pulleys in our combo kits are manufactured thicker than normal stock pulleys.  This requires longer 3/8" bolts to be purchased separately.  Allen head type bolts recommended.

Get the correct pulleys for your application by learning which water pump you have as explained in our tech article. SBC - Short vs Long Water Pump

Specs

  • Upper Pulley Grooves:  Two
  • Lower Pulley Grooves:  Two 
  • Upper Pulley Diameter:  6-5/8" O.D.
  • Lower Pulley Diameter:  5-7/16" O.D.
  • Upper Pulley Snout Hole:  5/8" O.D. (can be drilled out to 3/4")

Customer Reviews

Rated 4.2 out of 5 by 5 reviewers.
RATING BREAKDOWN
5 reviews
5 Stars
2
4 Stars
2
3 Stars
1
2 Stars
0
1 Star
0
RECOMMEND THIS PRODUCT:

myfordsbiggerthenyours
Verified Purchaser
Sacramento, CA, USA
Product Rating

very nice pulleys

March 03, 2015
Pulleys were very nice and fit well the only issue I ran into was the marched pair of belts need not work for my specific long w\p the belts were one size to small !
Pros:
  • Easy Installation
  • Very nice looking
Cons:
  • matched set of belts didn't fit
Yes, I recommend this product.
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CLC
Verified Purchaser
Santa Rosa, CA
Product Rating

Reduction Pulley Combo

February 20, 2012
Need to recommend that a longer bolt be used on the lower pulley to the crank shaft because of the thickness of the pulley.
Pros:
  • Easy To Install
  • Increases Power
  • Improves Engine Efficiency
  • Lightweight
  • Durable
Yes, I recommend this product.
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loadguns racing
Verified Purchaser
prescott az
Product Rating

sweet kit good quality

May 31, 2011
great quality and fair price only had one problem on back side the small raised lip thats goes in balancer bolt hole did not fit had to take about 5 thou off so it would bolt up flat
Pros:
  • Lightweight
  • Improves Engine Efficiency
Yes, I recommend this product.
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TIM FULL OF SIN
Verified Purchaser
ST PETE BEACH, FLORIDA
Product Rating

Pulley Combo for SBC

July 19, 2011
Good productS but they were not what I needed to solve a problem. They did not fit. I needed a 7" X 2" long pump water pump pulley and was sent the wrong size. Everything was returned and credit was applies at once. Would I recomened doing business with SPEEDWAY ? YES, YES AND YES.
Yes, I recommend this product.
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racecar mike
Verified Purchaser
poway ca.
Product Rating

reduction pulleys

April 10, 2011
is what it is
Pros:
  • Lightweight
  • Improves Engine Efficiency
Yes, I recommend this product.
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91015461

Product Q&A

2 questions : 3 answers

1 answers

Why does the crank pulley have 6 holes?

ExpressAutoCare
September 19, 2014

Why does the crank pulley have 6 holes?

Answers

September 19, 2014
EricM
The crank pulley has two sets of holes which are the same bolt pattern. There really is no reason to have the extra set of holes other than if one set of holes gets worn or damaged you can use the other set.
2 answers

I will need a belt for a block mount stock style power steering pump do you know what belt i need. I just ordered the pully set, on back order

JUST"DAVEY"
haslett MI
May 27, 2011

I will need a belt for a block mount stock style power steering pump do you know what belt i need. I just ordered the pully set, on back order

Answers

March 04, 2015
myfordsbiggerthenyours
I used a Gates belt # 7420 that goes around the water pump and crank pulley with plenty of adjustment in both directions !
June 03, 2011
John
This is a matched set of aluminum pulleys featuring 20% reduction for water pump. It comes with a matched set of belts and there is no provision for a third belt for a power steering pump. If a power steering pump is required customer will need to either run a 3 groove lower pulley with a specific groove for the power steering or a different belt that would run crank, water pump, and power steering pump. Belt requirements would need to be handled by local parts store or automotive supplier.
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Note: The lower crank pulleys in our combo kits are manufactured thicker than normal stock pulleys.  This requires longer 3/8" bolts to be purchased separately.  Allen head type bolts recommended.

Get the correct pulleys for your application by learning which water pump you have as explained in our tech article. SBC - Short vs Long Water Pump

 

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