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Rx7 Injectors In An Rb20

Sciclone

By Sciclone,
in Engines & Forced Induction

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Sciclone Enthusiast

Sciclone

Posted
Posted

Hi all,

I've read that you can fit series 5 RX7 injectors into an RB20 without too much problems, but I'm just wondering about the ins and outs of doing so. They are a high impedance injector, so it shouldn't require any ballast resistors, and they are a Top Feed, so no fuel rail mods (from what I can gather)

Has anyone done this mod and know any tricks/problems?

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https://www.sau.com.au/forums/topic/272548-rx7-injectors-in-an-rb20/
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Sciclone Enthusiast

Sciclone

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Thanks for the reply Adriano.

I was specifically wondering about the electrical side of things. What type connectors do the RB20's have (oval, square, custom)? I don't have an RB20 so I can't check.

I just want to know what is involved in fitting them, as I don't want to tell some poor sod that they'll fit straight in when there could be a lot of fiddling around involved. You do that, and it'll come back on you eventually...

Rekin Grand Master

Rekin

Posted
Posted
Thanks for the reply Adriano.

I was specifically wondering about the electrical side of things. What type connectors do the RB20's have (oval, square, custom)? I don't have an RB20 so I can't check.

I just want to know what is involved in fitting them, as I don't want to tell some poor sod that they'll fit straight in when there could be a lot of fiddling around involved. You do that, and it'll come back on you eventually...

Need generic injector connectors, rb20 connectors dont fit on gtr injectors unless you cut some of the notches off the injectors.

Have to wire in GTR resistor ballast, refer to the link below for my explanation.

http://www.skylinesaustralia.com/forums/Gt...mp;hl=injectors

Sciclone Enthusiast

Sciclone

Posted
  • Author
Posted
Need generic injector connectors, rb20 connectors dont fit on gtr injectors unless you cut some of the notches off the injectors.

Have to wire in GTR resistor ballast, refer to the link below for my explanation.

http://www.skylinesaustralia.com/forums/Gt...mp;hl=injectors

I'm not worried about GTR injectors (I already have a GTR).. As the title says, its 550cc RX7 injectors into an RB20 that I'm worried about.

grandmasterb Grand Master

grandmasterb

Posted
Posted

Steve,

rx7 550's are a direct drop in replacement for stock RB20 injectors. If there going to the trouble of putting them in i would be replacing the plugs anyway for peace of mind given there age. Other than that nothing else is required.

As for spray pattern, i never had any drama's when running mine :)

James_03 Mentor

James_03

Posted
Posted

Yes they are all high impedance Hitachi injectors. Mazda changed the injector plugs to an oval style plug for the S5 rx-7. The S4 rx7 injectors should be a straight drop in.

Be aware that the NA and Turbo injectors are similar in colouring. N/A is 460cc turbo is 550cc.

N/A part number: 195500-2020 (Purple/Red top)

Turbo part number: 195500-2010 (Red top)

If you end up getting S5 550's then you can get the oval style plugs of most toyota camry's, I got a set of a V6 2001 model camry that looked almost new. Be aware but that the spray pattern is like a garden hose, and for this reason I would not recommend them. Been there done that.

Personally I would be to go for Sard's or Nismo even if it does take a little longer to save for them.

Sciclone Enthusiast

Sciclone

Posted
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Posted

Thanks peoples. As I said, I have a GTR, so they're no good for me. I just don't want to rip someone off like I was.

Btw James, I think you have the part numbers the wrong way around. Every rx7 forum I've been on has the 2020's as the 550cc turbo injectors.

Sciclone Enthusiast

Sciclone

Posted
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Posted

Femno's got it in one...

I was ripped off as the person who sold these to me said they were a straight swap in for a GTR.... Now I have to find some way to recoup some my losses ie. sell them, without doing the same thing to someone else.

Ideally, I'd just like to give them back to the dude that sold me them and get my money back, but that's as likely as a hole in the head. So if anyone knows of any drag/drift cops with RB20's that want bigger injectors....

Sciclone Enthusiast

Sciclone

Posted
  • Author
Posted
Femno's got it in one...

I was ripped off as the person who sold these to me said they were a straight swap in for a GTR.... Now I have to find some way to recoup some my losses ie. sell them, without doing the same thing to someone else.

Ideally, I'd just like to give them back to the dude that sold me them and get my money back, but that's as likely as a hole in the head. So if anyone knows of any drag/drift cops with RB20's that want bigger injectors....

Don't worry all.. they do fit my RB26 after all, albeit with some modification to the loom...

Looks like I'll have to scour the wreckers or something...

Note to self: Check part numbers etc before buying..

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