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Author Topic: Quickchange horse power drain  (Read 5785 times)
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Rex Schimmer
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« Reply #30 on: December 12, 2016, 03:41:27 PM »

Frank06 said "No way it is 98% efficient.... chain drive isn't even that good." Actually roller chain is really only 90 to 92% efficient the best drive "chain style" drive are the HVO belt drives which are over 98% efficient.  Sorry for the hi-jack now back to quick change question.

Rex
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« Reply #31 on: December 22, 2016, 09:06:15 PM »

The latest issue of Hot Rod Mag has an interesting article about the Ford 9 inch its not anything helpful for my question but still good reading.
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« Reply #32 on: December 22, 2016, 09:37:38 PM »

They quoted an efficiency number in that article.

Regards, Neil  Tucson, AZ
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floydjer
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« Reply #33 on: December 23, 2016, 09:06:13 AM »

AMC products from 1982-87 used a 2.21 gear set. Maybe somewhere out in industrial gear-land there is a bevel gear set of 1.5-1 that a clever person with a mill and lathe (No, I am not volunteering) Could machine a case that would mount change gears to get you down to the ratio you want...Double gear reduction working in your favor.
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desotoman
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« Reply #34 on: December 23, 2016, 01:56:24 PM »

Maybe somewhere out in industrial gear-land there is a bevel gear set of 1.5-1 that a clever person with a mill and lathe (No, I am not volunteering) Could machine a case that would mount change gears to get you down to the ratio you want.

Has already been done by one person I know of, his name was George Parker (RIP), he made a quickchange back in the early 1990's and you could get it with a 1.5-1 or 1-1 ring and pinion.

Mel Swain (Swain Bros-Helash-Hoover) used the unit in his Blown Fuel Modified Roadster, in 1994 with a 1-1 ring and pinion. They still hold the top 3 engine class records at El Mirage in BFMR some 20 plus years later.

Tom G.


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« Last Edit: December 23, 2016, 02:05:28 PM by desotoman » Logged

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« Reply #35 on: December 23, 2016, 03:06:41 PM »

See...Every now and then I have a lucid thought...............
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Ron Gibson
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« Reply #36 on: December 23, 2016, 03:56:39 PM »

IIRC John MacKichan used a 1.5-1 bevel gear in a V8 QC center section in his and Tim's liner. He machined everything but the center housing (side bells,etc.) to make it work. I think with the right spur gears they could get .63-1 final drive ratio. Huge hours involved to get it done.

Ron
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Jack Gifford
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« Reply #37 on: December 24, 2016, 02:44:08 AM »

When Mickey Thompson first considered "challenging" (pun intended) Cobb's record in late '58, the first item he envisioned was single-spur-gear sets (1:2) at each wheel, to obviate the need for pinion shafts/bearing to spin about 13,000 RPM. These four gearsets were actually the very first pieces fabricated. Admittedly, this approach could possibly require reverse-rotation engine(s)- but it served very well in the Challenger 'liner (since 2 of the 4 engines needed reverse-rotation anyway). Just something to keep in mind...
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