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11-08-2023, 04:34 PM
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#1 |
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Junior Member
Join Date: Nov 2003
Location: Canada
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Cylinder head CC
My sbc exhaust port is at 64cc. NHRA spec is at 65cc. Is it maximum or minimum ?
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11-08-2023, 05:06 PM
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#2 | |
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VIP Member
Join Date: Oct 2007
Posts: 1,168
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Re: Cylinder head CC
Quote:
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11-08-2023, 05:57 PM
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#3 |
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Member
Join Date: Mar 2002
Location: Indian Land SC
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Re: Cylinder head CC
Posted intake and exhaust runner cc is maximum
Posted chamber cc is minimum Posted valve lift is maximum Posted overbore is maximum Posted piston assembly is minimum Hope this helps
__________________
Jim Marshall 1967 STK |
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11-09-2023, 08:59 AM
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#4 |
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Live Reporter
Join Date: Oct 2004
Location: Hickory, Ky
Posts: 10,629
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Re: Cylinder head CC
Don’t forget the weight of the crankshaft just in case they will be going to Indy for the first time!
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11-09-2023, 10:58 AM
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#5 |
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Senior Member
Join Date: Jun 2012
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Re: Cylinder head CC
Larry, where would one get the weights on the crankshafts? NHRA doesn't
list them on Blueprint Specs, and Dwight doesn't have have them listed. Never has. Thanks, J.R. |
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11-09-2023, 03:23 PM
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#6 |
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Live Reporter
Join Date: Oct 2004
Location: Hickory, Ky
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Re: Cylinder head CC
I’m not real sure. A core supplier would be a good source. We used to grind crankshafts and would ship some but most of them were hurry up we need it by this weekend. And I still have some waiting to be picked up and we closed the business over 25 years ago.
The AERA would be a very good source. Hope this helps. |
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11-09-2023, 07:41 PM
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#7 | |
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VIP Member
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Posts: 1,168
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Re: Cylinder head CC
Quote:
would replacement crank shafts get us in the ballpark? |
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11-09-2023, 08:06 PM
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#8 |
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Senior Member
Join Date: Jun 2012
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Re: Cylinder head CC
You would think they would. I just want to know where the ball park is!!
J.R. |
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11-09-2023, 08:14 PM
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#9 | |
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VIP Member
Join Date: Oct 2007
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Re: Cylinder head CC
Quote:
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11-09-2023, 11:10 PM
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#10 |
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Senior Member
Join Date: Jun 2012
Posts: 784
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Re: Cylinder head CC
Any combo. While it points ouet what we can't do to a crank, ie, knife edge.
excessive lightening etc. If we buy a lightweight crank, which a lot of S/SS people do, and it doesn't look like its been put on a serious machine shop diet, it passes. yet if we are out 2 grams on something else, we get treated worse in tech than some of the Pro Stock drivers have lately. J.R. |
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