641" C-head, 1170 hp
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Re: 641" C-head, 1170 hp
IDT-572 on July 19th 2011, 9:06 pm
Up date...............
990 tq from 5500 - 5900 1170 hp @6600 Now on to gas
990 tq from 5500 - 5900 1170 hp @6600 Now on to gas
IDT-572- BBF CONTRIBUTOR
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Re: 641" C-head, 1170 hp
KY JELLY on July 19th 2011, 9:19 pm
very impressive almost a 1000 of them ft lbs 
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Join date: 2008-12-03 -
Re: 641" C-head, 1170 hp
David Willingham on July 20th 2011, 12:20 pm
Gas deal couldn't be tuned properly in the three pulls we had time for, so we cannot take anything from that other than:
Alky made 17.8" of crankcase vacuum; Gas made 21" vacuum. Little more stuff getting by the rings.
It looks like the alky was taking up some air flow based off where the air correction table numbers were headed in the MFI box. That would agree with
the down nozzle deal.
Overall very happy with the engine. It ran well, made good power and didn't go home in a box full of pieces.
Alky made 17.8" of crankcase vacuum; Gas made 21" vacuum. Little more stuff getting by the rings.
It looks like the alky was taking up some air flow based off where the air correction table numbers were headed in the MFI box. That would agree with
the down nozzle deal.
Overall very happy with the engine. It ran well, made good power and didn't go home in a box full of pieces.
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Re: 641" C-head, 1170 hp
bruno on July 21st 2011, 8:06 am
very impressive David , now get her in the truck
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