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-   -   I have two 2004 MSM heads. Different (https://www.miataturbo.net/engine-performance-56/i-have-two-2004-msm-heads-different-96062/)

IcantDo55 02-12-2018 03:28 PM
I have two 2004 MSM heads. Different
 
One hads casting number "B P 1" other is "B P 2"?
What's ddifferen?

18psi 02-12-2018 03:42 PM
the casting

IcantDo55 02-12-2018 03:45 PM
Originally Posted by 18psi (Post 1466666)
the casting
I see. Anything in the shape of the casting other than the numbers ans letters?

18psi 02-12-2018 03:52 PM
Are you typing on your phone? My spelling Nazi senses are tingling.

...Dimensionally and functionally same

IcantDo55 02-12-2018 03:54 PM
Originally Posted by 18psi (Post 1466670)
Are you typing on your phone? My spelling Nazi senses are tingling.

...Dimensionally and functionally same
Yes and thanks.

albumleaf 02-12-2018 08:14 PM
Originally Posted by 18psi (Post 1466670)
Are you typing on your phone? My spelling Nazi senses are tingling.

...Dimensionally and functionally same
Likely functionally the same but I would guess you'd have a bimodal distribution of points if you measured the critical dimensions of a population of heads. Not that they'd be way out, but you can't just assume they're the same.

(for all intents and purposes they're probably the same.. maybe some Spec Miata folks actually care about the head castings)

DNMakinson 02-12-2018 09:15 PM
Originally Posted by albumleaf (Post 1466708)

(for all intents and purposes they're probably the same.. maybe some Spec Miata folks actually care about the head castings)
Before or after they over-machine them and are disqualified?


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