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08-14-2023, 02:10 PM | #11 | |
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Re: wanted - Ford Cylinder Heads
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Are these the same ports and chambers as the F1ZE-AA? I know that AA have GT40 cast on them, but otherwise I think they're identical to the BB. If that's true, it may be worth asking NHRA to approve them. It's a suggestion which I'm sure won't sit well with some folks.
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08-14-2023, 06:52 PM | #12 | |
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Re: wanted - Ford Cylinder Heads
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Bret Velde 2003 ??/SA |
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08-16-2023, 12:10 PM | #13 |
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Re: wanted - Ford Cylinder Heads
Someone told me that the F1ZE-AA head has larger valves than the F1ZE-B head.
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Marty Buth 3657 STK |
08-16-2023, 02:01 PM | #14 |
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Re: wanted - Ford Cylinder Heads
The -AA come with 1.84/1.54 valves.
The throats on a set I have measured 1.64"/1.27", which would give you a 92% intake throat and a 87.5% exhaust throat when using 1.780"/1.450' valves. In other words, you'd need to change the intake seats because the throat's too big. A 92% throat will work, but 88%-90% is where you want to be for a stocker. You'd also have to sink the exhaust valve, but there's enough material on the seats to keep the throat at 88-89%. Depending on how much you have to sink them, you may be better off replacing all seats in the heads.
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08-18-2023, 09:30 AM | #15 |
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Re: wanted - Ford Cylinder Heads
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08-18-2023, 09:50 AM | #16 |
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Re: wanted - Ford Cylinder Heads
Thanks Bret!
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Marty Buth 3657 STK |
08-18-2023, 09:58 AM | #17 |
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Re: wanted - Ford Cylinder Heads
Bret, I am confused. The F1ZE-B is an approved cylinder head, but the blue print spec. shows valve size to be 1.782"
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Marty Buth 3657 STK |
08-19-2023, 08:38 AM | #18 | |
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Re: wanted - Ford Cylinder Heads
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Bret Velde 2003 ??/SA |
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09-02-2023, 04:48 PM | #19 |
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Re: wanted - Ford Cylinder Heads
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