H82 vs AH82
- Thread starter Robertsamx
- Start date
- Tags difference h82 info jug ports
I always thought the AH stood for Aluminim Horizontal , but I could be wrong. Both 8.2 cubic inches obviously..I don't think I ever heard of an H82 unless maybe it's a saw motor (steel bore? ) and the AH was specifically built for karting.:shrug:
Louie Figone or Steve Miller on here might know...Hank Rotroff(sp?) is the PP guru.
Louie Figone or Steve Miller on here might know...Hank Rotroff(sp?) is the PP guru.
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H82 and AH82 are both 8.2 cubic inch engines. The H and AH are basically the same engine. Power Products prefixes indicate the following for engine identification: A-single cylinder, B-Two cylinder, V-Vertical crankshaft, H-Horizontal crankshaft. All 82 series engines have a cast iron cylinder liner. They are loop scavanged, 2.500 bore by 1.680 stroke. Some of the engines have been bored to fit the West Bend 820 piston (2.531) as stock pistons are no longer available. Some modification of the West Bend piston is required.
Gerry is right, Hank Rotoff and also Bobby Muha are the Power Products specialists. My work is mostly with the AH58 and AH61 series engines. I do have a NOS AH82 for display purposes only.
Model designation does not always indicate the exact displacement. Model AH81 is 7.98 cubic inches. The AH82 is 8.24 cubic inches.
They are not a high rpm engine but have lots of low end torque, it would make a monster mini-bike engine.
Gerry is right, Hank Rotoff and also Bobby Muha are the Power Products specialists. My work is mostly with the AH58 and AH61 series engines. I do have a NOS AH82 for display purposes only.
Model designation does not always indicate the exact displacement. Model AH81 is 7.98 cubic inches. The AH82 is 8.24 cubic inches.
They are not a high rpm engine but have lots of low end torque, it would make a monster mini-bike engine.
I just talked to Hank Rotoff about this, the H was the predecessor to the AH series. The AH series have an improved cylinder, the port belt area below the exhaust port and the transfer port area was increased in strength, also the crankcases were improved. The H82 verses the AH82 have a larger intake transfer port hole which was a weak area, the AH82 had that transfer port hole a little smaller with increased aluminum in the casting around the transfer port area to increase the strength of the barrel. Hank said to look at the outside of the cylinder below the exhaust port, the H82 is cast straight where as the AH82 has more material and tapers out to the cylinder mounting boss. I know the later AH58's have a heaver cast cylinder than the earlier AH58's, that took place around mid 1961. Power Products are notorious for spliting the cylinders in the port area, that is why I run girdles on my engines. All parts are interchangable between the A and AH series. If I knew how to post pictures here I would do the article on the improved AH58 from KART magazine.
As to why they went from H to AH, it may be they needed a way to identify the single from the twin. By the service manual I have they also built an AH and AV80, 8.0 cubic inch. The twins were BH and BV60, 6.0 cubic inch and the BH and BV69, 6.9 cubic inch.
As to why they went from H to AH, it may be they needed a way to identify the single from the twin. By the service manual I have they also built an AH and AV80, 8.0 cubic inch. The twins were BH and BV60, 6.0 cubic inch and the BH and BV69, 6.9 cubic inch.
