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Old 03-13-2009, 12:49 AM   #1
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Default NA, NB, MSM Fuel Injector confusion!!!

Well I think some light needs to shed and some clarity giving on the Mazda Miata factory denso saturated injectors.

I've heard so many different flow rating that I don't know what fuel injectors flow what...

90-93 blue tops flow 230cc/hr at stock fuel pressure right?
94-97 tan tops flow 260cc/hr at stock fuel pressure right?
99-00 maroon top injectors flow 260/hr at stock fuel pressure right?
01-05 purple top injectors flow 270cc/hr at stock fuel pressure right?

And now i've heard that 99-05 injectors flow 230cc/hr and only mazdaspeed injectors flow 270cc/hr... but I thought the MSM injectors were the same as the 01-05 injectors....
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Old 03-13-2009, 01:11 AM   #2
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but I thought the MSM injectors were the same as the 01-05 injectors....
They are.
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Old 03-13-2009, 01:20 AM   #3
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I believe the MSM injectors are 265cc.
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Old 03-13-2009, 01:48 AM   #4
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Then I hear that running larger injectors on the stock ecu will not increase the headroom you have on boost, as the ecu begins to curve down fuel maps to compensate with the larger injectors and richer A/F ratios...

Which, I hear vice versa on that...
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Old 03-13-2009, 11:17 AM   #5
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90-93 blue tops flow 230cc @ 43.5psi
94-97 tan tops flow 265cc @ 43.5psi
99-00 maroon top injectors flow 240cc @ 43.5psi
01-05 purple top injectors flow 265cc @ 43.5psi

however, the 99-00 EDIT:(and 01-05) injectors are designed to run at 60psi and have a better spray pattern. at 60psi they rate around 265cc (and 296cc respectively)


this is all in my FAQ i stopped linking in my sig.
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Old 03-13-2009, 12:16 PM   #6
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The 01-05 injectors are also designed to run ~60 psi, making them right around 296cc at that pressure.
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Old 03-13-2009, 12:31 PM   #7
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The 01-05 injectors are also designed to run ~60 psi, making them right around 296cc at that pressure.
thanks, my knowledge of anything past 93 is limited :P
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Old 03-13-2009, 12:45 PM   #8
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I knew it! Somewhere I remember recalling the returnless fuel systems on the 99-05's run a higher fuel pressure to atomize better....

By the way Brianeack, if your so smart, then you should be supporting Obama's Porkulus Package....

I mean, who doesn't want their savings to be further debased by government spending. I mean, isn't it the free market and people like you and me that caused this economic crisis? What we need is further government regulation, which is favorable for big business and poison for budget limited small businesses. And further taxation would ensure that entrepernuals can be contained like herds of cattle.... What we need is transfer of wealth from productive individuals, like you and me, to non-productive individuals like Obama.

Rush Limbaugh is a fat ************ who needs to lose some weight, but so far I am in agreement with everything he has said about the current administration... And I am a Union Electrician, so put two and two together and you'll see that I refuse to drink the Obama Kool-Aid...

Last edited by Cody Strife; 03-13-2009 at 12:59 PM.
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Old 03-13-2009, 03:09 PM   #9
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Damn guys, can we keep politics out of some of these threads?
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Old 03-13-2009, 06:08 PM   #10
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Lol!
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