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WTB: A14 Crankshaft?? |
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Home away from home  
Joined:
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From Los Angeles,CA
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Looking for a good A14 Crankshaft. I'm in Los Angeles...
Posted on: 2009/12/13 19:40
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Re: Identify these pistons? |
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Home away from home Joined:
2007/5/24 21:24
From Los Angeles,CA
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Registered Users
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I just checked the stroke... Only 70mm. It's an A12 Crankshaft In the A14 block... There's my missing compression.
Posted on: 2009/12/9 10:15
Edited by LOWTECH on 2009/12/9 10:36:43
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Compression Ratio? |
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Home away from home Joined:
2007/5/24 21:24
From Los Angeles,CA
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Registered Users
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Well... Hopefully my math is off. Based on the measurements and the formula I came across, with these pistons and an H89 head, the compression ratio works out to 8.08:1???!! That can't be right can it!?
Bore: 76.3mm
Stroke: 77mm
CChamber Volume: 30cc
Gasket Thickness: .8mm
Piston Dish: 2cc
Above Deck: 3mm
or Above Piston Volume: 15.717cc
I used a gasket Bore size of 79mm because that's all I could find but I assume there is a more appropriate size?
Any thoughts anyone?
Attach file:
 A14Pistons8.JPG (28.30 KB)
Posted on: 2009/12/9 9:04
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Re: Identify these pistons? |
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Home away from home Joined:
2007/5/24 21:24
From Los Angeles,CA
Group:
Registered Users
|
Well... Hopefully my math is off. Based on the measurements and the formula I came across, with these pistons and an H89 head, the compression ratio works out to 8.08:1???!! That can't be right can it!?
Bore: 76.3mm
Stroke: 77mm
CChamber Volume: 30cc
Gasket Thickness: .8mm
Piston Dish: 2cc
Above Deck: 3mm
or Above Piston Volume: 15.717cc
I used a gasket Bore size of 79mm because that's all I could find but I assume there is a more appropriate size?
Any thoughts anyone?
Posted on: 2009/12/9 8:49
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Re: Identify these pistons? |
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Home away from home Joined:
2007/5/24 21:24
From Los Angeles,CA
Group:
Registered Users
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I haven't measured them yet, but just eyeballing this dish seems to be only 1mm deep, possibly 2 at the most....
Posted on: 2009/12/8 11:30
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Re: Identify these pistons? |
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Home away from home Joined:
2007/5/24 21:24
From Los Angeles,CA
Group:
Registered Users
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Sorry DD,
It was a separate question. I know I'll need to measure the dish plus the combustion chamber. I'm building a new A14 and I'm aiming for 10:1 compression. Wondering if I can get there with these pistons as opposed to having forged ones made.Although, I was also hoping to go for a 78mm bore...
Posted on: 2009/12/8 11:17
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Re: Identify these pistons? |
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Home away from home Joined:
2007/5/24 21:24
From Los Angeles,CA
Group:
Registered Users
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The dish seems shallow to me... What is the formula for calculating compression ratio?
Posted on: 2009/12/8 10:57
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Identify these pistons? |
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Home away from home Joined:
2007/5/24 21:24
From Los Angeles,CA
Group:
Registered Users
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Can anyone identify these pistons? Are they stock A14's. They are in an A14 block...
Posted on: 2009/12/8 8:40
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Re: Topgear LSD's- H145, H165, H190, R180, R200... who's interested? |
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Home away from home Joined:
2007/5/24 21:24
From Los Angeles,CA
Group:
Registered Users
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Hello?............ 
Posted on: 2009/12/1 7:11
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Re: A14 pistons? |
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Home away from home Joined:
2007/5/24 21:24
From Los Angeles,CA
Group:
Registered Users
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Hey, I'm an artist not an engineer... Who needs math? Actually, I'm sure I can handle that formula, but I'm out of town and don't have access to a manual. What is the stroke for an A14 crank? Also, at 78 or 79mm what is done for a head gasket?
Posted on: 2009/11/29 7:22
Edited by LOWTECH on 2009/11/29 7:52:33
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