short/long water pump - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cwilkie · 07-20-2005, 02:28 PM

What is the difference between a short and long water pump? Visual and performance differences. Which are more common?

Chance

tomatocity · 07-20-2005, 03:31 PM

Yes. I am looking for the dimention difference myself.

Fred T · 07-20-2005, 04:02 PM

For a small block. There are a lot more long pumps out there than short. The change to a long pump can be a nightmare. All new accessories brackets and pulleys, along with a 73-80 power steering pump. The long pump will flow a little better, but it's easier to either shim the pump impeller to close the gap between the impeller and the block, or put in a high flow pump and thermostat.

cwilkie · 07-20-2005, 04:06 PM

I have a big block but is it the same for a big block?

Longhorn Man · 07-20-2005, 10:59 PM

small note...not that you'll stumble upon one in the junk yard or anything...the corevettes used the short pump quite a bit loner than the trucks did....maybe untill 82?

Fred T · 07-21-2005, 01:19 AM

For long pumps the dimensions change to 5-3/4 and 7-1/4

ac102nv · 07-22-2005, 04:40 PM

Quote:

Originally Posted by cwilkie

I have a big block but is it the same for a big block?

Not to steal your thread, but if you're looking I have a BB long waterpump setup (crank pulley, wp pulley, wp, ps pump w/ brackets & hoses, alt w/ brackets) I need to part with. Please PM me if interested.

07-20-2005, 02:28 PM	#1
cwilkie Chance Join Date: Sep 2001 Location: Belcourt ,ND, USA Posts: 750	short/long water pump What is the difference between a short and long water pump? Visual and performance differences. Which are more common? Chance __________________ 1968 Chevrolet Stepside BB 396 w/TH400 1972 Chevrolet 3/4 Ton 4x4 BB 496 w/TH400

07-20-2005, 03:31 PM	#2
tomatocity Registered User Join Date: Jun 2005 Location: Sacramento CA Posts: 1,255	Yes. I am looking for the dimention difference myself. __________________ Got bored, sold everthing. Got bored, looking for a 1960-66 C-10. Want to build my last truck.

07-20-2005, 04:02 PM	#3
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	For a small block. There are a lot more long pumps out there than short. The change to a long pump can be a nightmare. All new accessories brackets and pulleys, along with a 73-80 power steering pump. The long pump will flow a little better, but it's easier to either shim the pump impeller to close the gap between the impeller and the block, or put in a high flow pump and thermostat. Attached Images __________________ Fred There is no such thing as too much cam...just not enough engine. Last edited by Fred T; 07-20-2005 at 04:07 PM. Reason: massive brain fart

07-20-2005, 04:06 PM	#4
cwilkie Chance Join Date: Sep 2001 Location: Belcourt ,ND, USA Posts: 750	Big Block I have a big block but is it the same for a big block? __________________ 1968 Chevrolet Stepside BB 396 w/TH400 1972 Chevrolet 3/4 Ton 4x4 BB 496 w/TH400 Last edited by cwilkie; 07-20-2005 at 04:06 PM.

07-21-2005, 01:19 AM	#6
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	For long pumps the dimensions change to 5-3/4 and 7-1/4 __________________ Fred There is no such thing as too much cam...just not enough engine.

07-20-2005, 10:59 PM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	small note...not that you'll stumble upon one in the junk yard or anything...the corevettes used the short pump quite a bit loner than the trucks did....maybe untill 82?



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