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Old 12-06-2009, 12:27 PM   #1
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Default injectors and head

hey yall, i looked all over miata.net and couldn't find anything, so i figure i'd post here...
are the NB injectors (these are all-blue, not just diff colored tops) compatible with the NAs? i've heard they were, and heard they weren't due to impedance.
just trying to find a straight answer.
and is there a way to tell if a head is an NA 1.8 or an NB 1.8? how?
thanks!
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Old 12-06-2009, 12:31 PM   #2
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Yes they work.

Different bore spacing.
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Old 12-06-2009, 12:48 PM   #3
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for the head, i was looking more for like markings or codes? so i can tell if i'm buying an NB or an NA head by just looking at it.
i know the plugs are diff on the injectors, so i guess i'd need those, but will my NA be able to handle them? not using resistor boxes or anything like that.
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Old 12-06-2009, 12:55 PM   #4
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94-97 plain jane head BP05
99-00 & 04-05MS head BP4W
01-05 VVT head BP6D

Last edited by bryanlow; 12-06-2009 at 01:21 PM.
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Old 12-06-2009, 12:58 PM   #5
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Quote:
Originally Posted by bryanlow View Post
90-90 plain jane head bp05
99-00 & 04-05ms head bp4w
01-05 vvt head bp6d
thank you!
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