RDX Injector Fitment Improvement
- Thread starter OLDMNSX
- Start date
Anyone who is thinking about the RDX injector mods or already have this mod, I highly recommend this. The injector will fit a lot better! Long story short, if you don't have this mod, your RDX injectors will just be flowing along with the fuel rail.
My car runs much smoother and my butt dyno says yes!! Thanks to Brad providing the drill guide for the easy install.
If you have the infamous RDX injector idle problem, try this mod, replace your PVC valve, new injectors, clean your intake manifold, and clean all your valves with new gaskets. I don't know if any of these were directly related to my idle problem, but my idle problem is gone. Also if you have an aftermarket air filter (uni?) , don't oil your filter too much. The oil was clogging the little tunnels inside my intake manifold.
My car runs much smoother and my butt dyno says yes!! Thanks to Brad providing the drill guide for the easy install.
If you have the infamous RDX injector idle problem, try this mod, replace your PVC valve, new injectors, clean your intake manifold, and clean all your valves with new gaskets. I don't know if any of these were directly related to my idle problem, but my idle problem is gone. Also if you have an aftermarket air filter (uni?) , don't oil your filter too much. The oil was clogging the little tunnels inside my intake manifold.
So I have my kit now and am working on a little manifold clean up, polishing ports.
I also have the A.S. Motorsport Thermal Intake Gaskets I was going to install - http://www.nsxprime.com/forum/showthread.php/176094-Intake-manifold-upgrade-kit-GB-round-2-A-S-Motorsport
This seems to defeat the purpose of this mod lowering the tips of the injector closer into the head.
The A.S. Motorsport gaskets will raise the injector tips ~~ 0.300 higher.
Should I skip the A.S. Motorsport mod?
Any thoughts would be appreciated
I also have the A.S. Motorsport Thermal Intake Gaskets I was going to install - http://www.nsxprime.com/forum/showthread.php/176094-Intake-manifold-upgrade-kit-GB-round-2-A-S-Motorsport
This seems to defeat the purpose of this mod lowering the tips of the injector closer into the head.
The A.S. Motorsport gaskets will raise the injector tips ~~ 0.300 higher.
Should I skip the A.S. Motorsport mod?
Any thoughts would be appreciated
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Albert,
I found an unused set of the ProSpeed thermal gaskets prior to installing my RDX Mod. The whole setup is working very well for me. I would put them on since you have them. If you decide to NOT use them please let me know.
Brad
I found an unused set of the ProSpeed thermal gaskets prior to installing my RDX Mod. The whole setup is working very well for me. I would put them on since you have them. If you decide to NOT use them please let me know.
Brad
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Sorry - I just don't follow stuff so well.
I used AS thermal gaskets including the VVIS pan gasket/spacer with their set.
I still have had one hot start up issue that I wished would have gone; just needs a second try to start - it starts, so I guess who cares.
Maybe it is my chip - I don't know what version it is.
Wish I could get a v3 chip to read, I have programmer at office - would like to be sure I am at the latest version.
Other than that the parts are a nice fit, did have to bore out the fuel pipe spacers to a "J" letter drill (0.2770) for them to slide on.
I have a little Jet lathe and a Chinese collet set so it was fast work
Did a full manifold rebuild, and a pretty clean polish job at the same time - looks like new.
Need to drive it more, but physiologically it seems better, seat of the pants say this is working great.
Yes I have kits. I am not familiar with Bosch EV 14 injectors so can't answer that, although I would doubt it.
Brad
Hi guys, so what all is needed here for the “perfect” setup? The one least likely to cause issues and with the better fitment, I’d rather not have to do any drilling so is there an option that eliminates me doing any fabrication? What’s the cost of this setup? I caught the tail end of this discussion I guess I could back track and try to read through everything to find out if these questions have all been answered, or someone could be kind enough to give me a quick answer if there is one. Thanks in advanced!!
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Brad, I am interested in a kit. Do you have any left?
Hey [MENTION=13737]OLDMNSX[/MENTION], know it's been a little while since you've been active, but if there's still a NOS kit somewhere I'm interested 
RDX Injector Fitment Kit
I have a couple of my RDX Injector Fitment kits available. They are $88 shipped. My PayPal is [email protected]. Send me your address and some $$.
Brad
I have a couple of my RDX Injector Fitment kits available. They are $88 shipped. My PayPal is [email protected]. Send me your address and some $$.
Brad
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Great, thanks for continuing to provide these 
. Sent.
Not sure if you meant to misspell the email, but it might've been a good idea anyways. I think my email got scraped by spambots from one for-sale post a few months ago...
. Sent. Not sure if you meant to misspell the email, but it might've been a good idea anyways. I think my email got scraped by spambots from one for-sale post a few months ago...
I received an order for one set today. I have two sets left. I don't plan on producing any more. First come, First Served.
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Or rather, I don't think you should post your email here in plaintext or you might start getting spammed
Thanks Brad, kit received. I wasn't planning on using it for another several months at least, so if you or someone else needs the drill bit and guide in the meantime please let me know and I can send it off.
Hey Brad I’m super interested in this kit! I have my intake off for VVIS inspection and cleaning and noticing this exact issue!
You may want to email him, as Brad isn't on Prime that often anymore. I used his kit and it works perfectly.
Thanks! But how do I email him? I’m kinda new on here even if this account has been open since 2015.. I really need this kit with the RDX injectors. Thanks Honcho
bradnsx @ gmail.com (without the spaces)
Hello !!!!!!! Is this kit still available ??? How to proceed on a 2000 NA2 ( C32B ) ???
This mod will not work on a 2000 NA2 because there is no way to adjust your fuel maps to account for the larger injectors. To use the mod, you'll need to change to an aftermarket ECU like Haltech or Motec. If you put RDX fuel injectors on your NSX and attempt to run them on the stock ECU, the car will run very poorly (if at all) and you will likely damage your engine.
Thanks for your reply Honcho !
I was asking because I also intend to install Toda Racing type C camchafts ( and possibly Toda high compression pistons + larger throttle body - 70mm ). Those mods will require aftermarket ECU anyway... So I also wanted to know what would be the best aftermarket ECU solution for my project ???
Thanks,
Regis.
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