[j0n51]

Just went na-t and want bigger injecotrs. Which ones will fit in the na motor without any modification??

 

[Insported]

+1

 

[Stinkbutt]

The RX-7 550cc, fit perfect. I think the years are from 89-92.

 

[twinturbosupra94]

yeah 550 are good 440 are a bit small.....i did the 440 mkiii turbo injectors and resistor box cuz I got them for 20

There is a brand that you guys need to steer clear of, many people complained about them....i forget the name though

 

[DaveH]

If you are obd1, you'll want denso style top feed injectors... preferably high impedance, but you can use low impedance if you wire in a resistor pack.

 

[Insported]

So the rx-7 550's are top feed, high impedance?

 

[Gunnar]

yeah 550 are good 440 are a bit small.....i did the 440 mkiii turbo injectors and resistor box cuz I got them for 20

There is a brand that you guys need to steer clear of, many people complained about them....i forget the name though

That'd be the Venom ones I believe.

 

[j0n51]

just any rx-7 550 injectors?? Do they have to be oval top or square??

 

[Stinkbutt]

The RX-7 are high independance injetors that are drop in replacments. You can use you stock clips to.

 

[MadMaxx]

just any rx-7 550 injectors?? Do they have to be oval top or square??

Red top (some say purple, shit looks dark red to me) oval plug.

Year Plug Flow Mazda PN
89-91 oval 550cc 195500-2020

 

[Stinkbutt]

These are the ones I have in my car now. And that is the correct part number

 

[michaelvanle]

Red top (some say purple, shit looks dark red to me) oval plug.

Year Plug Flow Mazda PN
89-91 oval 550cc 195500-2020

That's because there are the red tops (440cc) and the purple tops (550cc)...

89-91 non turbo = "red tops" 440cc's
89-91 turbo = "purple tops" 550cc's

 

[Stinkbutt]

No, my red tops are 550cc. I had them flow tested and cleaned and they were all at 550 +/- a point or two.

 

[kmn5]

That'd be the Venom ones I believe.

Yeap the venoms are garbage,
just search on SF, there are a few threads about them

 

[j0n51]

No, my red tops are 550cc. I had them flow tested and cleaned and they were all at 550 +/- a point or two.

who does the flow testing and cleaning??

 

[michaelvanle]

Here's a picture of the RX7 550cc injectors I installed on my car. I had them cleaned and test flowed by RC Engineering to within 1% of each other. I believe it was like $15 per injector.

 

[j0n51]

thanx michealvanle...

 

[michaelvanle]

I did some good ole searching. I believe this is the part number for it: 195500-2020

 

[j0n51]

I did some good ole searching. I believe this is the part number for it: 195500-2020

where can I get these injectors??

 

[michaelvanle]

rx7club.com