The A.D.D Thread
Joined: Nov 2007
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From: Maggie Valley, NC
The total piston speed of the longer stroke of the F22 would result in what Honda decided was an unacceptable piston speed at 9000rpm.
F20 stroke is 84mm at 9000rpm = 756,000mm / min
F22 stroke is 90.7mm at 8000rpm = 725,600mm / min
If the F22 ran to 9000rpm = 816,300mm / min
It is all about how safely you can move those parts, stop them, and get them moving in the other direction - in an engine you expect to run for 100,000 miles unlike F1 motors that they only have to last a few races.
F20 stroke is 84mm at 9000rpm = 756,000mm / min
F22 stroke is 90.7mm at 8000rpm = 725,600mm / min
If the F22 ran to 9000rpm = 816,300mm / min
It is all about how safely you can move those parts, stop them, and get them moving in the other direction - in an engine you expect to run for 100,000 miles unlike F1 motors that they only have to last a few races.
Thread Starter
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From: Portlandia
Originally Posted by VintageMac,Mar 14 2009, 04:58 PM
Well, MONICA -
The good news is that I added you and EVAN to the Dundee Drive.
The bad news is that the long-range forecast is for rain.
Sometimes you can't win!
The good news is that I added you and EVAN to the Dundee Drive.
The bad news is that the long-range forecast is for rain.
Sometimes you can't win!
Hardtop drive!!! 
Thread Starter
Registered User
Joined: Dec 2007
Posts: 22,535
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From: Portlandia
Originally Posted by VintageMac,Mar 14 2009, 04:58 PM
Well, MONICA -
The good news is that I added you and EVAN to the Dundee Drive.
The bad news is that the long-range forecast is for rain.
Sometimes you can't win!
The good news is that I added you and EVAN to the Dundee Drive.
The bad news is that the long-range forecast is for rain.
Sometimes you can't win!
Well, at least we'll be in good company
Monica
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From: Medford, OR
Originally Posted by ncsu-tc,Mar 14 2009, 04:59 PM
unlike F1 motors that they only have to last a few races.
well...actually the gearbox has to remain unchanged for 4 consecutive races...I think it's totally fine to do an engine swap after each race.
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Posts: 7,084
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From: North Portland, OR
Originally Posted by ncsu-tc,Mar 14 2009, 04:59 PM
The total piston speed of the longer stroke of the F22 would result in what Honda decided was an unacceptable piston speed at 9000rpm.
F20 stroke is 84mm at 9000rpm = 756,000mm / min
F22 stroke is 90.7mm at 8000rpm = 725,600mm / min
If the F22 ran to 9000rpm = 816,300mm / min
It is all about how safely you can move those parts, stop them, and get them moving in the other direction - in an engine you expect to run for 100,000 miles unlike F1 motors that they only have to last a few races.
F20 stroke is 84mm at 9000rpm = 756,000mm / min
F22 stroke is 90.7mm at 8000rpm = 725,600mm / min
If the F22 ran to 9000rpm = 816,300mm / min
It is all about how safely you can move those parts, stop them, and get them moving in the other direction - in an engine you expect to run for 100,000 miles unlike F1 motors that they only have to last a few races.
