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Old 11-27-2006, 11:38 AM   #1
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Default injectors supra 89-92 for NB miata

Plz Is it really possible to fit for NB /99/ miata 1,6 16V 81 kW injectors from for example Supra non turbo 311cc /light green top/ saturated high impedance?
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Old 11-27-2006, 11:49 AM   #2
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yes they plug right in. Tuning them is another story.

(USD) '99-00 injectors are actually only rated at 238cc, but run at 60psi as opposed to 50psi on all other miatas. The ECU would probably have no trouble idling 94-98 and 01-05 injectors, which are rated at 265cc. An increase of 11%. Capable of 215BHP at 100psi of fuel.

I'm sure it could idle the supra injectors, but you may see a rich idle. I dunno how a MAF miata would go about leaning out the idle without an ECU, unless the ECU can compensate for a 22% larger injector.

Early miatas can mess with the AFM and adjust flapper tension and idle mixture.
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Old 11-27-2006, 04:40 PM   #3
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thanks ,I will try to fit something around 300cc
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Old 11-27-2006, 05:24 PM   #4
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I have those in my '99, works great. I'm making somewhere around 205-210rwhp on those. Controlled by EMU.
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Old 11-27-2006, 05:31 PM   #5
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You can also run RX7 550cc High Impedance injectors as well.
Just throwing out another option.
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Old 11-27-2006, 05:33 PM   #6
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Sorry for the offtopic but how much power can be made with greentop 310cc injectors on otherwise stock NB fuel system?
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Old 11-27-2006, 05:36 PM   #7
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I know the 99-00 NBs runs at 60psi (returnless), so around 200BHP.
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Old 11-28-2006, 01:43 AM   #8
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Wow, how come I'm making 210rwhp on those, with 12afr all the way to redline, at least my wideband says 12. I must be maxing them out ha?
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Old 11-28-2006, 01:59 AM   #9
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cause you got yourself an EMU that can tinker with pulse widths and this and that.
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Old 11-28-2006, 02:05 AM   #10
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Alright, but I'll still try to get some bigger injectors as I plan on raising the boost 1-2psi to get to about 220-230rwhp.
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