Jump to content
SAU Community

Recommended Posts

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?

Link to comment
https://www.sau.com.au/forums/topic/272548-rx7-injectors-in-an-rb20/
Share on other sites

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...

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

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.

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 :)

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.

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.

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....

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..

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Gday Thought it was about time I started a build thread! As expected this project has snowballed into a huge financial liability, but unless you’re strong willed and responsible, it’s not a surprise. Background -  My first turbo car was an R32 GTS-4, got my full license and then totalled my Au Falcon a week later, so while trying to sell my RMZ450 dirtbike to buy another car a bloke offered to swap the R32 which at the time I felt like I was ripped off but looking back and seeing prices of those now ($40kish) it was a good deal, I didn’t know enough about these cars to appreciate what I had so sold it before the RB20 blew up. Between here and there, out of 12 cars I’ve owned the note worthy ones are a V8 Lexus SC400 (soarer), a couple of XR6 Turbos and my beloved S15 which I had for about 3 years, picked it up for $12500, repairable write off but she was fine, gun metal grey/pewter and bone stock/unmolested until I got my hands on it. Ended up spending about the value of the car and 280kw, 2 demerit points by the time I got defected and sold it for $14500 (also $40kish in today’s market, rip) Fast forward to the present day, I’m in a much better position financially and daily an MQ Triton (great cars, pipe down Ranger Bois), I cruised marketplace and car sales for a few months looking for another R32, the best deal I could find was an absolute rust bucket half finished project for $12000, until this R33 popped up in Port Macquarie for $18k - unregistered and barely running but decent shape, kept an eye on it for a few weeks and the price steadily dropped, $16k then $15k then $14k, that was the point where I was like shit someone’s gonna snatch this up! It was owned by a young bloke who had big plans but him and his missus just had a baby so smartest move financially for them but big gain for me. So 2 days later I’m towing a car trailer to pick this thing up. Roughly 2 weeks and $3500 later I’m cruising around Newcastle in my beat up R33 all smiles and dose noises! It only needed some basic shit to get it going, coil packs and air flow meter, electrical stuff and all fluids changed, 158k kms and running pretty good, nice smooth engine after oil and coolant flush - when I say coolant I mean it had been filled up with tap water, every gallery and heater element was filled with rust, 8-9 flushes later and still had brown liquid coming out but she’ll be right. The car was painted R34 Bayside Blue at some point but whether it was a cheap job or just not looked after is anyone’s guess, clear coat flaking like sausage roll.  Was rethinking my choices and contemplating life, had it up for sale for $22k - still cheaper than any registered R33 but got little interest, next minute I had an opportunity at work - 6 months overseas for good money, so that was a no brainer, fast forward again and here we are with a 50% finished project. Current Mods - 200ish KW according to butt dyno Was tuned with Apexi PowerFC EBC (old school Greddy Profec)  Stock turbo (more shaft play than a Tinder date gone right) 3inch turbo back Varex muffler  Aftermarket injectors of mystery size, Power FC showed 36% duty cycle at full boost so not behd good size Someone had good intentions but stuck with the stock R33 MAF so we had misfires at 6000rpm due to the MAF hitting 5.2V So far I’ve redone the entire interior with carpet form Car Mats Direct, new Seats and steering wheel from Autotechnica, also sound system by Autobarn (mainly Kicker) Also MCA pro comfort coil overs - Hands down best purchase yet, worlds of improvement over the tired 30yrold shocks Goals - 450kw/600hp on flex tune New paint job - Midnight Purple 2 Engine is at the shop getting rebuilt with forged rods a pistons, new valves and springs, ATI Harmonic balancer, Aeroflow 7.5L sump, rear head drain and oil restrictors as per oil control thread* and cam covers modded for larger breathers, other stuff I can’t recall of the top of my head Parts purchased and to be installed once the engine is done -  Engine loom from Wiring Specialties including these options: Haltech Nexus S3 R35 Coil pack conversion  PRP Dual Trigger kit Fan controller  Other Parts -  262 Kelford Cams Turbo - Hypergear ATR43SS3-ProS with T51R mod (whistly boi) 6 boost manifold (high mount) 50mm Turbosmart Pro gate (plumbed back for legal reasons) HKS Super Turbo Exhaust with High Flow Cat Custom 3.5inch dump and front pipe 1500cc Bosch injectors  Fuel Pump walbro 525 Haltech MAP and IAT sensors Haltech Flex Sensor Fenix Radiator with dual thermo fans LS1 Alternator Kit Oil Filter Relocation from EFI solutions and Cooling pro oil cooler Many other things sitting in my garage waiting for that engine to come back. Progress pics to follow -  
    • Losses have to be less with DC coupling. Provided the battery inverter has decent MPP tracking ability - which really shouldn't be a problem. It's not 2005 any more.
    • Hi, Will the R33 GTR rear brake backing plates fit a GTST? I'm struggling to find GTST ones but can find new GTR ones.   Thanks.
    • I also got the same floor mats for a bit of extra bazzaz haha
    • Some more close up pics now that I’m back to working on the car, the loop pile is nice but again haven’t compared it to the other types in person, it’s hard to tell from the pics on the website. View of the hemming on the edges too, it comes in 2 pieces - front and back, honestly very happy with it for anyone on the fence.  Also attached my previous pics from further up as it didn’t let me post them directly before. (Nothing worse than photo bucket pics that aren’t hosted anymore years later)
×
×
  • Create New...