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Author
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Topic: 306 build up
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05s197
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Member # 13235
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posted
 
 
http://www.powerblocktv.com/episode/HP2010-01/horsepowers-blue-oval-302#.U-lpxhZKfR
after watching this video I decided I want to do something similar. I want RHS 200cc heads 58cc chamber and want to keep the stock connecting rods and crankshaft. In the video they claim a compression ratio of 10.2:1 and say for the test they used 89 octane fuel. My first question wouldnt the engine detonate with that low octane with that CR? second question what pistons should I get for maximum CR on 91 octane?
Posts: 54 | From: walnut creek/concord | Registered: Oct 2013
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Tom Renzo
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Member # 13165
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posted
Depends on the cam not the compression ratio. Always pick a cam before a compression figure.
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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Greasy
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Member # 5258
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posted
quote:
Originally posted by Tom Renzo:
Depends on the cam not the compression ratio. Always pick a cam before a compression figure.
When you get a custom cam and are filling out the cam sheet it asks what compression ratio you're going to be running.
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'93 Cobra-Coyote Powered
'03 DSG Cobra
'13 Dodge Cummins
'14 Rubicon X
Posts: 3272 | From: North Dallas | Registered: Jan 2005
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4IDFOX
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Member # 9921
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posted
quote:
Originally posted by Greasy:
quote:
Originally posted by Tom Renzo:
Depends on the cam not the compression ratio. Always pick a cam before a compression figure.
When you get a custom cam and are filling out the cam sheet it asks what compression ratio you're going to be running.
And the fuel.
Posts: 375 | From: Redding CA | Registered: Apr 2010
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Tom Renzo
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Member # 13165
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posted
Thats right if you want them to select your cam. But asking how much compression you can run on 91 is a moot question because you do not know the specks of the cam you are running. First the cam then the compression ratio. Simple that is how it works.
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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05s197
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Member # 13235
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posted
Okay thanks for the help. what pistons should I get while keeping the stock crankshaft and connecting rods?
Posts: 54 | From: walnut creek/concord | Registered: Oct 2013
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