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#1
03-01-2005, 05:02 PM
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Are these a good choice for me? There in the local paper.
I cant find my engine codes right now and the cars is parked and covered in snow! The motors a 1974 400 2bbl and has stock 4x heads on it now, 98cc i belive. If i need to get the codes just let me know and i will. Thanks in advance! |
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#2
03-01-2005, 05:02 PM
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Are these a good choice for me? There in the local paper.
I cant find my engine codes right now and the cars is parked and covered in snow! The motors a 1974 400 2bbl and has stock 4x heads on it now, 98cc i belive. If i need to get the codes just let me know and i will. Thanks in advance! |
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#3
03-01-2005, 05:35 PM
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Probably not much difference.
What's wrong with the 4X's you have? The 7H1 have a smaller intake valve, bigger exhaust than the 4X. Probably about the same chamber size.
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#4
03-02-2005, 12:52 PM
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The 7HI heads have a 1.96 inlet and 1.77 exhaust with 80cc chambers,pressin studs.Have used these heads on a 400 fitted 2.11 inlets,screwin studs opened ports up and drlled and taped for end header studs.These heads need work but the potential is there (mill 0.050"=72cc chambers)
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#5
03-02-2005, 03:57 PM
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by johnta1:
Probably not much difference. What's wrong with the 4X's you have? </div></BLOCKQUOTE> There 2 bbl heads, Does that matter? Please pardon a newbie... |
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#6
03-02-2005, 04:44 PM
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After 1973 when the 4X started then the 6X's, the heads are all basically the same except for combustion chamber sizes.
They are about the same CR as the 7H1, but have 2.11" intake valves and 1.66" exhaust valves,with screw in studs for the 74 4X's. You could also do as Welsh said.
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#7
03-02-2005, 05:06 PM
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Thanx for the advice
Mike |
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