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Posted by: 80cap Oct 7 2017, 04:59 PM

I need some advice for replacing my heads. After only 2k miles my engine dropped a valve seat. The engine dude I used was a big mistake. The engine was running strong before the valve seat went south. I am leaning toward new heads because a rebuild for 40 year old heads is not a good idea. In a recent post McMark referenced that AA has new castings that look good but they are round port heads. How do you make them work with oval headers? I appreciate any and all comments.
Thanks Brian

Posted by: mgphoto Oct 12 2017, 10:32 AM

Round ports are oval, square ports are later bus heads.

Posted by: Porschef Oct 12 2017, 10:45 AM

No recourse with the builder or are you just looking to avoid him altogether?

Posted by: McMark Oct 12 2017, 11:30 AM

Yup, round=oval ports. Just a naming thing. Call them either one and you're talking about the same thing.

But square ports are different.

These are the ones you want... Part#: 004 CH 039 BC

https://aapistons.com/collections/bare-casting/products/aa-bare-2-0l-porsche-914-casting-3-stud-round-port

Posted by: 80cap Oct 12 2017, 02:59 PM

Porschef
I just want to forget that total experience. I just hope what nothing else surfaces.
Brian

Posted by: Mueller Oct 12 2017, 03:33 PM

QUOTE(McMark @ Oct 12 2017, 10:30 AM)

Yup, round=oval ports. Just a naming thing. Call them either one and you're talking about the same thing.

But square ports are different.

These are the ones you want... Part#: 004 CH 039 BC

https://aapistons.com/collections/bare-casting/products/aa-bare-2-0l-porsche-914-casting-3-stud-round-port

Once purchased, how much more $ needs to be spent for a decent hardware setup? (stockish build)

Posted by: saigon71 Oct 12 2017, 04:09 PM

Happy to hear these are available now.

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