wanted - Ford Cylinder Heads

[SBillinson]

Originally Posted by BRETV

They were over the counter and marine applications. They were pre production GT40 heads before the GT40's came out in 93. The Explorer heads were all GT40P's.





Bret Velde
2003 ??/SA

Bret,

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.

[BRETV]

Originally Posted by SBillinson

Bret,

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.

They are the same head. I mentioned the same idea to Marty. We have done that in the past.





Bret Velde
2003 ??/SA

[Marty Buth]

Originally Posted by BRETV

They are the same head. I mentioned the same idea to Marty. We have done that in the past.





Bret Velde
2003 ??/SA

Someone told me that the F1ZE-AA head has larger valves than the F1ZE-B head.

[SBillinson]

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.

[BRETV]

Originally Posted by Marty Buth

Someone told me that the F1ZE-AA head has larger valves than the F1ZE-B head.

The F1ZE-B head has 1.84/1.54 also. That's the head I had my 92 Mustang SS/LA car.




Bret Velde
2003 ??/SA

[Marty Buth]

Originally Posted by BRETV

The F1ZE-B head has 1.84/1.54 also. That's the head I had my 92 Mustang SS/LA car.




Bret Velde
2003 ??/SA

Thanks Bret!

[Marty Buth]

Bret, I am confused. The F1ZE-B is an approved cylinder head, but the blue print spec. shows valve size to be 1.782"

[BRETV]

Originally Posted by Marty Buth

Bret, I am confused. The F1ZE-B is an approved cylinder head, but the blue print spec. shows valve size to be 1.782"

Yes, we had to take the 1.84/1.54 valves out and replace them with the the legal 1.78/1.45 valves. Just like Sbillison said in a previous post.



Bret Velde
2003 ??/SA

[Dragrac419]

https://www.ebay.com/itm/29572191802...Bk9SR_D1ovrKYg

here is a set on eBay for sale