NB 1.8 Head and Inlet Manifold on 1.6 engine.

Captain Scarlet · Postby **Captain Scarlet** » Sat Apr 21, 2012 6:46 pm

Has anyone here done it?
CS
:NA6:

sailaholic · Postby **sailaholic** » Sat Apr 21, 2012 7:01 pm

Don your fire proof jacket for that one. A quick search would have told you the bore spacing on a 1.8 is different. Ie the heads don't fit.

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Captain Scarlet · Postby **Captain Scarlet** » Sat Apr 21, 2012 7:13 pm

I refer to Keith Tanners Mazda Miata Performance Projects "Retrofitting an NB head on an NA Engine". Pardon me, is this for the NA8 only?

CS

Dweezle · Postby **Dweezle** » Sat Apr 21, 2012 7:40 pm

Captain Scarlet · Postby **Captain Scarlet** » Sat Apr 21, 2012 8:07 pm

He does mention the 1.6 in the article. The text implies the conversion is possible. Hence my confusion.

CS

Postby **mx52nv** » Sat Apr 21, 2012 11:31 pm

From the book:

Project 16 * Retrofitting an NB Head on an NA Engine - pg 45 wrote:Applicable years 1994-1997

Dweezle is correct - the NA8 BP motor is what Keith Tanner is referring to.

Captain Scarlet wrote:He does mention the 1.6 in the article. The text implies the conversion is possible. Hence my confusion.

CS

I can't seem to find any reference to the NA6 model or B6 engine in my copy so perhaps just a little confusion when the author refers to the "NA engine"?

Les

Captain Scarlet · Postby **Captain Scarlet** » Sun Apr 22, 2012 12:20 am

Thank you for the replies and clarifications you have been most helpful.
CS

sailaholic · Postby **sailaholic** » Sun Apr 22, 2012 7:58 am

Great to see the question had some research behind it! Apologies on short response.

Fyi, while the NB head flows better stock, that's not the case once you do port work.

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