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Old 09-01-11, 03:07PM   #16
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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   #17
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Quote:
Originally Posted by Ken Keefer View Post
what length rod and stroke?
He's probably got a 4" stroke.
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Old 09-01-11, 03:27PM   #18
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Originally Posted by Ken Keefer View Post
what length rod and stroke?
4.250 stroke, 6.800 rod.
There is no need to go bigger, just more wear and tear on the engine.
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Old 09-01-11, 03:29PM   #19
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Quote:
Originally Posted by Gach View Post
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.
Here you go
http://www.wallaceracing.com/cr_test2.php
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Old 09-01-11, 03:30PM   #20
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Spherical dish if you can fit it.Bill C.
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Old 09-01-11, 07:07PM   #21
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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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Old 09-03-11, 05:08PM   #22
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Allpontiac will have 460-465 cfm cnc ported Tiger heads as a catalogue item,we just did some small refinements.Bill C.


what's the intake port volume in the head ?
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Old 09-03-11, 05:13PM   #23
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I think 310-320 cc Maybe more.
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Old 09-03-11, 06:26PM   #24
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Port volume is 348cc, average csa 4.205,min csa 3.46 average port velocity is 268fps.Bill C.
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Old 10-17-11, 12:30PM   #25
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Port volume is 348cc, average csa 4.205,min csa 3.46 average port velocity is 268fps.Bill C.
Bill anyone running these heads yet? What kind of power are they capable of?
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Old 10-17-11, 07:00PM   #26
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On Franks Grand-Am engine 1076HP at 7300rpm.Bill C.
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Old 10-17-11, 07:45PM   #27
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On Franks Grand-Am engine 1076HP at 7300rpm.Bill C.
Power with an out of the box Tiger intake?
Thanks for sharing the info by the way.
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Old 10-17-11, 08:21PM   #28
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Intake has been petted on,OTB intake made 1052.Bill C.
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