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It's on a 351W, running "outside" the serpentine belt, so I believe Counter Clockwise.
When looking at the impeller, the old one seems CCW, but looking at the Edelbrock 8840, the impeller seems to be CW.
The 8840 is supposed to be CCW, but I have doubts... impeller design seems counter intuitive to me.
It's difficult to see on the 8840, the the blade seems to "catch" the water CW...
Notes: 5.750 in. hub height. Gaskets included. Fits all 1986-93 5.0L V8s using a serpentine accessory drive belt. Reverse rotation. Not for early model 289-302 V8s. Has heavy-duty 3/4 in. ball/roller bearing. Dimension from block surface to hub: 5-3/4 in. Inlet diameter 1.78 in.
That would lead me to believe you are all set, spin it with the back of the belt and it will turn the correct way. Hope this helps!
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FFR 4948 purchased 2013 incomplete, IRS planned 351W,Tremec,3.27's
Both are CCW and should fit the smooth pulley.
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2005 FFR Mk3 Roadster, 302/340hp, MassFlo EFI, Breeze Pulleys, T5, Aluminum Flywheel, 3-link rear with Torsen Diff and 3.27:1 gears, Power Steering, Breeze Front Sway Bar, SN-95 Spindles with outboard SAI Mod, Breeze Battery Mount, QA1 Externally Adjustable Shocks, Quick Release Steering Wheel, Vintage Race seats, GM Arctic White, Sky Blue Scoop, Hidden Hinges, Billet Aluminum Side-view Mirrors, 2,183lbs wet. 1967 Mustang Fastback, Dark Moss Green, black interior, '67 14" styled steel wheels, 2000 Explorer 302 w 5.0 Cam, Quickfuel 450 CFM, 289 Hi-Po Dual exhaust, C4, lowering springs w Shelby drop.
I need now to mount and test, but no rush, have to wait for the snow to melt...
FFR 5353K, 408W, TKO 500, 2015 IRS w/ 315 gear, Breeze QA1 DA coilovers front and rear, APE hardtop, Forte front swaybar
I just had to remove them to expose the impellers.
And also to apply some RTV on both side of each gasket.
Remembering that the pump must be looked at from its back side - all references to orientation are from the drivers seat.
"Normal" rotation for SBF's is the image on the right, counter-clockwise. "Reverse rotation" pumps are the ones used on serpentine belt systems.
IF your pump spins in the same direction as your crank, it's "standard" rotation.
little block, BIG BLOCK . . .
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My water pump is definitely running with a Serpentine belt, and being driven "outside" of the belt loop, the pump is definitely Counter Clock Wise.
Your drawing explains it clearly, I was under the impression that the blade were supposed to "scoop" the water, but I was wrong, it's supposed to "push" it out ;-)
We learn everyday! Thanks!
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