[Squidward]

I wasted my 11 bolt short nose pump yesterday at the track. I like my existing pulley setup (1969 Firebird, a/c, ps). The options for short nose pumps are few and costly.

Is there a magic bullet WP pulley that spaces everything back enough to align when going from 8 or 11 bolt short nose pumps to 11 bolt/4.5" wp's?

I came across 9799128 as a part number (69-70 gto, ac, ps, 2 groove) that appeared to be a good conversion piece. Those seem to be tough to find, or billet conversion pulleys exist out there. This car is a driver, so I am fine with a standard steel piece.

I also was able to search through my friends box of spares, and he had a 14023156 Chevy wp pulley that was a direct bolt on. It measured about 2.85" from the bottom pulley edge to the top mounting surface, and appears to be .5" deeper than my previous short nose pulley (2.35", measured same way). It looks straight, or maybe at most 1/16" inch too shallow, but I will try it anyways.

So... 2 questions.
1. Before I search out a Pontiac piece (9799128) for the conversion, is this a good fit, and all that is needed?

2. Concerning the Chevy pulley: Although the pulley measurement differences appear to be what I need (.5"), visually it looks a hair too shallow. Would 1/16" be anything to worry about?

[Cardo]

I sent my '65 8 bolt to Flying Dutchman last fall and had it rebuilt. He charged me $145 including return shipping. He also had me send him my divider plate so it could be properly clearanced when he pressed the impeller back on. I think this may the best option.

[nytrainer]

Nice. is there a contact for F.D. you can share?

[Cardo]

The Flying Dutchman is here. http://water-pump-rebuilders.com/

[Squidward]

Thank you, Cardo. That is an option, but I am really looking to move into the world of the 4.5" wp. I have 3 on hand, and originality is no concern.

[gto4evr]

you can expand your search. 127, 128 and 130 are the WP pulleys you can use. (they're all just differences in diameter) 128 was the AC pulley so I think somewhere around 6" in diameter from memory. the 130 was a non AC and I think 7-1/2" Not sure on the 127, I'll have to check the book

I believe I might have an extra 130, I'll check this weekend if someone doesn't hook you up first

['ol Pinion head]

Originally Posted by gto4evr

you can expand your search. 127, 128 and 130 are the WP pulleys you can use. (they're all just differences in diameter) 128 was the AC pulley so I think somewhere around 6" in diameter from memory. the 130 was a non AC and I think 7-1/2" Not sure on the 127, I'll have to check the book

I believe I might have an extra 130, I'll check this weekend if someone doesn't hook you up first

The "130" was also an AC usage pulley. It like the "128" should be used in injunction with the "842" crank pulley. If the '69 is factory non AC car, the "127" pulley is what one needs to go with the tall 11 bolt pump. Try & keep all these pulleys in stock, currently, have at least one "130", just shipped out a complete AC diam pulley changeover.

[Squidward]

Originally Posted by 'ol Pinion head

The "130" was also an AC usage pulley. It like the "128" should be used in injunction with the "842" crank pulley. If the '69 is factory non AC car, the "127" pulley is what one needs to go with the tall 11 bolt pump. Try & keep all these pulleys in stock, currently, have at least one "130", just shipped out a complete AC diam pulley changeover.

I was hoping you would bump in! Car is a factory ac car running the ac pulley, since I have ac. So I am guessing the 129 is the dealio for me? Do the ac vs non ac wp pulleys have a different depth, diameter, or is it the crank pulleys, or both?

Thx!

[gtospieg]

Th AC pulley(128) is a smaller diameter to turn the pump a little faster...more flow= better cooling

[gto4evr]

Originally Posted by 'ol Pinion head

The "130" was also an AC usage pulley. It like the "128" should be used in injunction with the "842" crank pulley. If the '69 is factory non AC car, the "127" pulley is what one needs to go with the tall 11 bolt pump. Try & keep all these pulleys in stock, currently, have at least one "130", just shipped out a complete AC diam pulley changeover.

thanks for the correction, I had my 127 and 130's switched. (I'm getting old and memory's slippin'!)

127 is 69/70 non AC and 8" in diameter
130 is 69 AC and 7-3/16" diameter (used for service replacement of the 6062 pulley for going from short to tall pump so it matched the 6062 diameter so no belt change required)
128 is 70 AC and 6-7/16" diameter.

All three have same depth and as long as you've got the 68-70 crank pulley, an 11 bolt timing cover, tall pump and the 67-70 alt/ps bracket, all three will work. As stated above, the smaller the diameter the faster the water pump will spin.

[Squidward]

Originally Posted by gto4evr

thanks for the correction, I had my 127 and 130's switched. (I'm getting old and memory's slippin'!)

127 is 69/70 non AC and 8" in diameter
130 is 69 AC and 7-3/16" diameter (used for service replacement of the 6062 pulley for going from short to tall pump so it matched the 6062 diameter so no belt change required)
128 is 70 AC and 6-7/16" diameter.

All three have same depth and as long as you've got the 68-70 crank pulley, an 11 bolt timing cover, tall pump and the 67-70 alt/ps bracket, all three will work. As stated above, the smaller the diameter the faster the water pump will spin.

Awesome! Pure gold!

But how does one explain the presence or lack of the single ac pulley? Do the non ac crank pulleys make up for it to keep the accessory pulleys in alignment?

Question: When the depth of one of these pulleys is measured to get "x.xx inches", how are they being measured? From what to what? I would like to cross check the Chevy pulley that I put on, because that seems to be a close fit so far.

Thanks!

[gto4evr]

yes, the pulley alignment was made up for by the crank pulley version, the rest of the alignment between alternator, PS and WP stayed the same whether it was AC or not.

68-70 all v8 non AC was 9790846 two groove with 7-1/4 diameter
68-70 all v8 with AC was 9790842 two groove with 8" diameter
68-70 all v8 with AC was 9790843 one groove with 7-5/16" diameter

the difference was the thickness of the single AC pulley in the change in depth on the 846. Though I've seen the wrong one being run with none the wiser since it's so small of a difference, or the poor mans fix when they notice it and they put the pulley face plate behind the pulley instead of in front of it! (at least that's the benefit of the doubt I'm giving to whoever put the front of my friends 68 together because when I pulled his crank pulley off, I told him he was missing the plate and then we found it behind the pulley after removing it!

[Squidward]

Originally Posted by gto4evr

yes, the pulley alignment was made up for by the crank pulley version, the rest of the alignment between alternator, PS and WP stayed the same whether it was AC or not.

68-70 all v8 non AC was 9790846 two groove with 7-1/4 diameter
68-70 all v8 with AC was 9790842 two groove with 8" diameter
68-70 all v8 with AC was 9790843 one groove with 7-5/16" diameter

the difference was the thickness of the single AC pulley in the change in depth on the 846. Though I've seen the wrong one being run with none the wiser since it's so small of a difference, or the poor mans fix when they notice it and they put the pulley face plate behind the pulley instead of in front of it! (at least that's the benefit of the doubt I'm giving to whoever put the front of my friends 68 together because when I pulled his crank pulley off, I told him he was missing the plate and then we found it behind the pulley after removing it!

Um, that is actually not a bad innovation. I guess it would work. Thanks again!

[Squidward]

Originally Posted by Squidward

I also was able to search through my friends box of spares, and he had a 14023156 Chevy wp pulley that was a direct bolt on. It measured about 2.85" from the bottom pulley edge to the top mounting surface, and appears to be .5" deeper than my previous short nose pulley (2.35", measured same way). It looks straight, or maybe at most 1/16" inch too shallow, but I will try it anyways.

Update: I just took it out for a drive following the water pump replacement and FiTech install. It had a few blasts between 4500-5500, and still has the belts with the Chevy pulley installed!

[Squidward]

Still haven't thrown a belt after several strip passes, shifting at 5k. Seems like the Chevy wp pulley is essentially the same as the 128 pulley.

I picked up a swap meet 130 pulley this weekend. The diameter is larger, but the depth appears to be correct, the same as the Chevy. I don't know if I will swap over or not. It would probably be fine, but I like lots of flow here in the summer.