FastColt

iTrader: (5)

Hey guys, did a search, turned up nothing, will the stock injectors out of an evo 8 (565cc) work on a miata? I see a lot of people running 440's (stock 4g63 injector) Dont stone me, i just sold my 11sec 400hp 4g63 mirage and got a miata that im building a kit for as we speak. Thanks for the help.

Bond

iTrader: (6)

Miata Turbo FAQ: Fuel Injectors

I didn't see it on the list, but there you go anyways.

100 posts. WOOT WOOT.

18psi

iTrader: (76)

I honestly dont know either, but have heard of the wrx 440's working

miataspeed2005

iTrader: (3)

depends what year your car is and if they are high or low impedience and i doubt they would be just plug and play but you could make them work

18psi

iTrader: (76)

why would year matter? people use the newer miata injectors on the older miata's all the time, dont they?

Braineack

iTrader: (62)

they are too short. maybe 4mm or so...maybe if the fuel rail spacers were removed, but it's a long-shot.

Gotpsi?

iTrader: (5)

I run 550's so there not to big, I even herd of a guy running 1000's I think his user name is CEO, but he's got a crazy set up.

Braineack

iTrader: (62)

oh wait I'm thinking of WRX and STi injectors...i dunno what the EVO injectors look like...

18psi

iTrader: (76)

Braineack

iTrader: (62)

they look like they work, other than the connector at least, but they may be short as well, it's hard to tell.

Splitime

iTrader: (24)

If the DSM 450s work... those will. I like the 560 evos alot over the older dsm 450s. Better spray pattern for smoother idle and smoother everything. Its a 4 point spray design vs single center pintle.

This is from honda useage though... i run rx7 550s on the miata.

jdmcwestevo

iTrader: (1)

evo injectors will not work they are peak and hold not saturated i looked into it they are not plug and play atleast u could use a resistor or something maybe i forget wat i read on how to use them for the miata but its more trouble than its worth

Stephanie Turner

There is a way to make EVO injectors work. We did it on Ivan's car. You do need to use a specific resistor pack, but it can be done. I think the final cost of 440/460 cc injectors and resistor pack was around $200.00.
Stephanie

jdmcwestevo

iTrader: (1)

ya because they are peak and hold not saturated i figured u just need resistors or something its just more trouble than they are worth. just go with rc's if u want something big thats wat i had in my evo the 750s and 1000s are great. obviously not many guys on here need that big but im sure their 550s are great too

18psi

iTrader: (76)

used Deatschwerks for both my 650's and 750's and loved em

Rich

The stock Evo injector will work but you'll need new clips and may need ballast resistors. I bought RC750's (part # PL4-0750D - D for Denso type) which are listed as suitable for the Evo after advice from another miata owner running them.

Rich

JKav

iTrader: (1)

Yes you will need resistors--the stock Evo injectors are low impedance.

Anyone tried the Bosch saturated injectors sold by injectordynamics.com? No affiliation, etc. Heck, I don't even know if they'd fit a Miata. They're eons more modern than the injectors sold by RC, FIC, etc.

STravisVrooman

I'm pretty sure they're high impedance, I'm sure I would've checked that prior to using them. Work great on my car.

JKav

iTrader: (1)

They're low impedance, and they're used with a 6 ohm resistor pack and saturated drivers from the factory.

STravisVrooman

Well damn, I've been running them for well over a year w/o resistor packs, what kind of damage will that do?