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Old 08-26-11, 07:34PM   #1
Big Speed
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Default Tiger 460-465CFM, cnc .

Allpontiac will have 460-465 cfm cnc ported Tiger heads as a catalogue item,we just did some small refinements.Bill C.
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Old 08-26-11, 07:51PM   #2
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Nice, the Tiger just got better.
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Old 08-26-11, 09:25PM   #3
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Well that 465 cfm head with the 8 extra bolt option is the most sure fire HP you can just buy and put together out there.
With the extra bolts and cooling option how many runs are the head gaskets good for, high CR, NA ?
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Old 08-26-11, 11:55PM   #4
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Well that 465 cfm head with the 8 extra bolt option is the most sure fire HP you can just buy and put together out there.
With the extra bolts and cooling option how many runs are the head gaskets good for, high CR, NA ?
Never thought of it that way...best bang for the buck. Dollar for dollar, pound for pound king.
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Old 08-28-11, 03:33PM   #5
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What's the biggest CC chamber available (Tiger) with good velocity and numbers?
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Old 08-28-11, 03:44PM   #6
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Ken ,the current Tiger is at 59 cc,the shape is important to the flow curve, we could probably run the program deeper ,but i dont have any data ,but could try it on one of the model heads,The 8 additional head bolt is currently only available on solid heads.Bill C.
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Old 08-30-11, 10:07PM   #7
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I did not think the Dirty Bird had solid heads. Were they even made back then?
So, the only Pontiac head available with the 8 extra head bolts with a water jacket is the old E head like R. Butlers engine has?
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Old 08-30-11, 10:11PM   #8
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I don't think it did, but I'm sure it has solid heads on it now.
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Old 08-31-11, 10:09PM   #9
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Valve size?
CSA?
Would make for a nice pump gas head
With a 59 cc chamber, you'd need one hell of a dish piston...No ?
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Old 09-01-11, 01:45AM   #10
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How much of a dish do you have must be pretty deep cc dish.
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Old 09-01-11, 01:58PM   #11
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Spherical dish if you can fit it.Bill C.
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Old 09-01-11, 03:03PM   #12
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IMO my dish isn't that big at all, mid to high 20s (can't remember for sure now). The shape of the dish can help make power
what length rod and stroke?
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Old 09-01-11, 03:07PM   #13
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4.350 bore 4.250 stroke 59 cc chamber. How much of a dish would you need for 10.50 to 11.01 compression. I have a 16 cc dish now with a 75 cc chamber. Which comes out to 10.80 compression.
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Old 09-01-11, 03:09PM   #14
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what length rod and stroke?
He's probably got a 4" stroke.
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Old 09-01-11, 07:07PM   #15
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4.350 bore 4.250 stroke 59 cc chamber. How much of a dish would you need for 10.50 to 11.01 compression. I have a 16 cc dish now with a 75 cc chamber. .052 head gasket. Which comes out to 10.80 compression.
With a 59 cc chamber my compression would be 11.98. Allot of compression for pump gas. Don't think I'd go with anymore then 11.00 specially what's available at the pumps, you never know what your getting.

EC, what's your bore and head gasket thickness.
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