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NAPA Water Pump #TFW-43026P HP #1465156 07/09/13 08:36 AM 07/09/13 08:36 AM
Joined: Jan 2003 Posts: 5,444 Indiana Y YO7_A66 OP master
YO7_A66 OP master Y Joined: Jan 2003 Posts: 5,444 Indiana	I am going to replace my 340 water pump and I am looking at this HP unit from NAPA. http://www.napaonline.com/Catalog/Catalo...026P_0394929358 Has anyone used this one and had any good luck with it? Thanks 1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)

Re: NAPA Water Pump #TFW-43026P HP [Re: YO7_A66] #1465157 07/09/13 08:51 AM 07/09/13 08:51 AM
Joined: Feb 2009 Posts: 1,274 Ontario.Canada C can.al pro stock
can.al pro stock C Joined: Feb 2009 Posts: 1,274 Ontario.Canada	..just replaced my squeaky 340 pump with this one. ..the gasket supplied was not a good fit but i thought it was close enough to seal. ..changed pump and it leaked bad so replaced with the correct gasket. ..i would have used a standard 6 vane pump but nobody had one in stock. ..working fine after a few test miles!

Re: NAPA Water Pump #TFW-43026P HP [Re: can.al] #1465158 07/09/13 08:56 AM 07/09/13 08:56 AM
Joined: Jan 2003 Posts: 5,444 Indiana Y YO7_A66 OP master
YO7_A66 OP master Y Joined: Jan 2003 Posts: 5,444 Indiana	Since this is an 8, what is the difference between the 6 and the 8 vein? I was planning on buying the Mr. Gasket brand gasket with it. EDIT: I found the 8 vein Severe Duty unit: http://www.napaonline.com/Catalog/CatalogItemDetail.aspx/Water-Pump-Remfd/_/R-WP_58457H_0131329320 I contacted NAPA and they can not purchase this unit. (Why is it on their web sight?) Thanks Last edited by YO7_A66; 07/09/13 09:52 AM. 1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)

Re: NAPA Water Pump #TFW-43026P HP [Re: YO7_A66] #1465159 07/09/13 01:17 PM 07/09/13 01:17 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	I've never had an issue with any cheap parts house rebuilt WP. I'd get an 8 blader if you can as it flows more & weld an anticav plate on it (6 or 8 vane) & you can also press the vanes closer till they are ~.030" from the pump housing for a more efficient pump then weld the vanes at the center shaft so the vanes will stay put. Support the front shaft at the cross when pressing the vanes in your shop press. Not everybody agrees but imnho the faster the water speed the better as long as pump speed ain't over ~5800 RPM (with cav plate) when picking pulley sizes which means a lower RPM eng can use a smaller WP pulley. EDIT set the gasket on the t cover then flip it over & it'll fit either way but 1 way it covers more flat area, it's subtle but you'll see Last edited by RapidRobert; 07/09/13 01:23 PM. live every 24 hour block of time like it's your last day on earth

Re: NAPA Water Pump #TFW-43026P HP [Re: RapidRobert] #1465160 07/09/13 02:10 PM 07/09/13 02:10 PM
Joined: Feb 2003 Posts: 8,681 A Andrewh master
Andrewh master A Joined: Feb 2003 Posts: 8,681	6 vane is a/c pump, 8 vane is non-a/c. a/c pulley is smaller so it runs it faster.

Re: NAPA Water Pump #TFW-43026P HP [Re: Andrewh] #1465161 07/11/13 11:10 PM 07/11/13 11:10 PM
Joined: Jan 2003 Posts: 5,444 Indiana Y YO7_A66 OP master
YO7_A66 OP master Y Joined: Jan 2003 Posts: 5,444 Indiana	I bought the NAPA HP unit and it is #43026P and it is a new pump assembly, not a rebuilt unit. You can see in the picture the new one is a 8 vein and my old one is a 6. NAPA said that the 8 vein is the AC unit. Thanks 7773657-NAPA8vsOld6.jpg (40 downloads) 1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)

Re: NAPA Water Pump #TFW-43026P HP [Re: YO7_A66] #1465162 07/11/13 11:42 PM 07/11/13 11:42 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: NAPA said that the 8 vein is the AC unit. they are mistaken there but the 8 blader is better. You might consider welding on an anticav plate. I just cut a round disc out of a clothes dryer side panel & had my welder weld it on live every 24 hour block of time like it's your last day on earth

Re: NAPA Water Pump #TFW-43026P HP [Re: RapidRobert] #1465163 07/12/13 02:32 AM 07/12/13 02:32 AM
Joined: Aug 2003 Posts: 6,301 colorado A a12superbee master
a12superbee master A Joined: Aug 2003 Posts: 6,301 colorado	Quote: Quote: NAPA said that the 8 vein is the AC unit. they are mistaken there but the 8 blader is better. You might consider welding on an anticav plate. I just cut a round disc out of a clothes dryer side panel & had my welder weld it on Could you expand on that? Do you weld the plates to the vanes? No balance issues? I can't afford this. mark

Re: NAPA Water Pump #TFW-43026P HP [Re: a12superbee] #1465164 07/12/13 03:10 AM 07/12/13 03:10 AM
Joined: Jan 2003 Posts: 27,468 So Cal autoxcuda Too Many Posts
autoxcuda Too Many Posts Joined: Jan 2003 Posts: 27,468 So Cal	Milodon has pumps made for them, but they weld an anti cavitation plate. AND they check and adjust the depth of the impeller. They said they find impellers at the wrong depth, that's why they check and adjust them.

Re: NAPA Water Pump #TFW-43026P HP [Re: autoxcuda] #1465165 07/12/13 07:41 AM 07/12/13 07:41 AM
Joined: Jan 2003 Posts: 5,444 Indiana Y YO7_A66 OP master
YO7_A66 OP master Y Joined: Jan 2003 Posts: 5,444 Indiana	""Unlike Most Standard Pumps, Performance Pumps Are Less Prone To Cavitations For Longer Service Life."" This is from the NAPA websight for this new pump. Could they have done something to the pump to fight the cavitation issues? Thanks 1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)

Re: NAPA Water Pump #TFW-43026P HP [Re: autoxcuda] #1465166 07/12/13 09:01 AM 07/12/13 09:01 AM
Joined: May 2005 Posts: 4,733 Florida BDW master
BDW master Joined: May 2005 Posts: 4,733 Florida	Quote: Milodon has pumps made for them, but they weld an anti cavitation plate. AND they check and adjust the depth of the impeller. They said they find impellers at the wrong depth, that's why they check and adjust them. Like this? Don't see anything about the plate. http://m.summitracing.com/parts/mil-16250

Re: NAPA Water Pump #TFW-43026P HP [Re: BDW] #1465167 07/12/13 11:29 AM 07/12/13 11:29 AM
Joined: Jan 2003 Posts: 27,468 So Cal autoxcuda Too Many Posts
autoxcuda Too Many Posts Joined: Jan 2003 Posts: 27,468 So Cal	Quote: Quote: Milodon has pumps made for them, but they weld an anti cavitation plate. AND they check and adjust the depth of the impeller. They said they find impellers at the wrong depth, that's why they check and adjust them. Like this? Don't see anything about the plate. http://m.summitracing.com/parts/mil-16250 I run that Milodon pump and it has a plate. Maybe Milodon's website mentions the plate.

Re: NAPA Water Pump #TFW-43026P HP [Re: a12superbee] #1465168 07/12/13 10:08 PM 07/12/13 10:08 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: Could you expand on that? Do you weld the plates to the vanes? No balance issues? Yes just cut a round plate ~1/2" larger in diameter than the vanes. Drill a 3/4" hole in the center & (3) 1/4" holes for a 6 vane on every other vane & 4 holes for an 8 vane on every other vane about halfway between the center & the perimeter, just locate em on the fattest part of the vane & have your welder MIG em. No issue with the balance as there's not enough weight there & you center the disc on the vanes & have the welds spaced every other one. The ideal vane rearward to pump clearance is .030" & vane to timing cover flat including the gasket is .040" On a SB the round plate gets welded to the vanes & on a BB you have to cut it in half & set the halves between the vanes & the pump then weld em. The anticav plate makes a world of difference. live every 24 hour block of time like it's your last day on earth

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