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#1
04-19-2020, 12:32 PM
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Crank flywheel pilot diameter
I know there are 2.75 diameter cranks(esp the 3.25 cranks) but I;ve read different references for the 400 cranks 2.50 and 2.60. There are even flywheels for both.
I have two 400s and the 301T form the 81 on engine stands and they all measure 2.50. What cranks are 2.6?
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#2
04-19-2020, 01:07 PM
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I've never seen a Pontiac crank with a 2.6 flywheel register
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| The Following User Says Thank You to PAUL K For This Useful Post: | ||
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#3
04-19-2020, 01:29 PM
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Thanks Paul. I saw some on line reference and also PRW has two flywheels one with a 2.5 -2.75 spacer ane one with a 2.6-2.75. But all mine are either 2.5 or 2.75.
__________________
Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#4
04-19-2020, 02:39 PM
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2.6" registers are from an earlier time zone. Like 1955 through part of 1963.
Info here http://www.pontiacpower.org/PontiacCranks.htm Clay |
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#5
04-20-2020, 09:26 AM
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That reference has my 78 400 listed as 2.6 and it is definitely 2.5, and also has no 2.5 listings.
__________________
Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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