Clutch fan upgrade

[mm1077]

What clutch/fan setup is anyone using on a long water pump with factory shroud (standard Sbc 350 non-AC truck) I’ve got the original 4 blade fan now and it cools great but I’d like to quiet down the noise aspect. I’ve read through the old posts and everything I can find as far as part #s was used on a short pump setup. Or does it even really matter? Thanks-Mike
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[Stocker]

Are you sure you have a long WP? This thread suggests your truck should have a short WP. https://67-72chevytrucks.com/vboard/...d.php?t=826073

[mm1077]

Originally Posted by Stocker

Are you sure you have a long WP? This thread suggests your truck should have a short WP. https://67-72chevytrucks.com/vboard/...d.php?t=826073

I’m not sure at all : ). I searched online and something made me decide that I had a long pump lol.
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[kwmech]

Short pump. If you had a long pump, the fan with a clutch would be rubbing on the radiator

[72SB]

A 7 blade 18" fan and Fan clutch

This is the fan I bought. SBC, short WP

https://www.npdlink.com/product/fan-...1967&year=1967

and Fan Clutch

https://www.npdlink.com/product/clut...%3D0%26year%3D

the center of fan blade is about 2" from face of WP pulley fan clutch bolts to. If you needed the fan to be further out you can just add a spacer or find a fan clutch with a longer neck

[Stocker]

Originally Posted by 72SB

A 7 blade 18" fan and Fan clutch

This is the fan I bought. SBC, short WP

https://www.npdlink.com/product/fan-...1967&year=1967

and Fan Clutch

https://www.npdlink.com/product/clut...%3D0%26year%3D

mm1077 -- Yep, you have a short water pump.

72SB -- That fan looks perfect, same as my OEM fan.
A question about that clutch, if you don't mind. Do you know if it's standard duty (front fins around the outer perimeter only), or is it heavy duty(fins across the entire front)?

Either should work OK for the OP since he doesn't have AC. I prefer a HD clutch just for the additional cooling -- necessary or not.


EDIT: Link to Hayden's site showing differences between standard-, heavy-, and severe-duty clutches. https://www.haydenauto.com/en/produc...-types/thermal

[RustyPile]

Originally Posted by mm1077

I’m not sure at all : ). I searched online and something made me decide that I had a long pump lol.
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If that's pictures of your water pump, that "something" was wrong.. Referencing your pictures, when installed, the back of the short water pump almost touches the timing chain cover. On the long water pump, there is a considerable gap between the back of the pump and the timing chain cover.. Enough gap to actually put fingers in the gap..

The two pumps aren't interchangeable as the pulleys on the pump would not align with the other pulleys..

[mm1077]

Thank you for the replies and confirmation of what I’ve actually got : ). I’m pretty confident in ordering the correct parts now
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[72SB]

Originally Posted by Stocker

mm1077 --
72SB -- That fan looks perfect, same as my OEM fan.
A question about that clutch, if you don't mind. Do you know if it's standard duty (front fins around the outer perimeter only), or is it heavy duty(fins across the entire front)?

fins are also on front of fan clutch. My WP is also HD, Airtex Wells I got on Rockauto

I had the asymmetrical 5 blade and it was OK until I get stuck in traffic for 30 min so I went 7 blade, problem solved. The 5 blade was fine with my 327 but the BPE 355 wanted more fan

NPD is not far from me so I bought my 5 blade, FC I had but the 7 blade did not bolt up to the FC I had so had to get this one while I was there

[72SB]

Originally Posted by mm1077

Thank you for the replies and confirmation of what I’ve actually got : ). I’m pretty confident in ordering the correct parts now
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just make sure the FC you get fits the fan you get