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#21
11-16-2020, 10:57 AM
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The numbers on the front of the heads tells me they are 72 cc D-ports….i know they came from Butler....could they have CNC´d the Chambers to make them larger?
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#22
11-16-2020, 11:24 AM
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Picture of the casting end for Pontiac D-Port Cylinder Head 72cc from the Edelbrock website here:
https://www.edelbrock.com/rpm-cnc-po...aft-61595.html The 87cc head has casting number 6156 .
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE Last edited by Steve C.; 11-16-2020 at 11:35 AM. |
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#23
11-17-2020, 05:54 AM
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Quote:
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---------------------------- '72 Formula 400 Lucerne Blue, Blue Deluxe interior - My first car! '73 Firebird 350/4-speed Black on Black, mix & match. |
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#24
11-18-2020, 03:10 PM
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Look:
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#25
11-18-2020, 03:48 PM
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According to the website picture linked for the end of the head if it has d-port exhaust it has the wording "D-PORT" under the PERFORMER.
The D-215-94 is the emissions code number. Under those EC numbers is the 4-digit number for either a 72cc chamber or a 87cc chamber. .
__________________
'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
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#26
11-20-2020, 08:31 AM
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As you can see in the pic, my heads only Show one number...
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#27
11-20-2020, 11:43 AM
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__________________
'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
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#28
11-20-2020, 02:31 PM
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I ran EDL PERF RPM Round Ports on my 350 with flat top pistons. The CR was approximately 10.5:1.
My Current build is a 496 will be running the same 72ccc E-heads... however the pistons have a 40cc's dish and sit .020 in the hole. The 5 layer cometic gaskets are in the .050 range (I forget exact thickness) and CR will be in the 8.75:1 ball park. I plan on running 10-15lbs boost. The piston tops, combustion chambers and exhaust ports are all ceramic coated as well.... Good luck with your project. SPEED SAFE, NICK
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"The grass is not greener on the other side, its just fertilized with different $h!t" |
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