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Modded RSX-S injectors for more flow

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Old Nov 24, 2006
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Modded RSX-S injectors for more flow

Seems some of the guys on CRSX have been modding their stock injectors by removing the plastic tip and waffer to flow better, getting the flow rate up to about 550cc's. Seems like an easy mod and a great way to save money and get to 10psi easy. http://forums.clubrsx.com/showthread.php?t=411693
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Old Nov 25, 2006
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i think i might try this>>>>>> so remove the wafer from the injector and put the plastic piece and o-ring back on.... also change the setting on your emanage/aem ems from 310cc to 517cc injectors size
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Old Nov 25, 2006
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I think a best idea for guys that need to upgrade their injectors is getting Comptech Injectors. They are brand new Honda injectors modded and rated at 520cc plus they come with a warranty in case anything goes wrong.

Click here for Comptech Injectors
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Old Nov 25, 2006
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Emanage will not allow you to idle these injectors without a barometric pressure sensor code. Been there, tried that with 440's.

^As far as a 520cc, not only will you run into the baro senor code, if it requires the rail to be extended with spacers, they won't work for a stock d17 intake manifold.
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Old Nov 26, 2006
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Originally Posted by andyman97
Emanage will not allow you to idle these injectors without a barometric pressure sensor code. Been there, tried that with 440's.

^As far as a 520cc, not only will you run into the baro senor code, if it requires the rail to be extended with spacers, they won't work for a stock d17 intake manifold.


thanks, nevermind then!
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Old Nov 27, 2006
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Originally Posted by andyman97

^As far as a 520cc, not only will you run into the baro senor code, if it requires the rail to be extended with spacers, they won't work for a stock d17 intake manifold.
well if they are already using the rsx injectors with the extended spacers then it will be no problem.

Me personally i am already running this mod on my k20 setup and have done the same for a boosted d17 running rsx injectors using emanage. no problems with his nor any code
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Old Nov 27, 2006
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hmmmmmmmmmm
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Old Nov 27, 2006
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Originally Posted by xproductionz
well if they are already using the rsx injectors with the extended spacers then it will be no problem.

Me personally i am already running this mod on my k20 setup and have done the same for a boosted d17 running rsx injectors using emanage. no problems with his nor any code
Right but you're using kpro for the k20 swap. And stock rsx injectors are only 320cc.
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Old Nov 27, 2006
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Originally Posted by andyman97
Right but you're using kpro for the k20 swap. And stock rsx injectors are only 320cc.

I thought it was 310cc?? anyways
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Old Nov 27, 2006
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^Either way, the variation in map voltage to idle a 3XX injector is not going to give a code. The variation with a 5XX injector will.
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Old Nov 27, 2006
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The MAP/Baro sensor code Andy is referring to is caused by the MAP sensor input and the e-manage'd ECU output being too much variation caused by the tune on the additional injection map, air flow map AND/OR injector correction factor. The stock ECU does not like to see a difference in the MAP input and output greater than .1V. It will ideally tolerate .05-.07 in variation and not throw a code.

All of this info was ascertained through hours of datalogging and note taking on the e-manage sometime ago when we 1st did it on the 7thgen.
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Old Nov 27, 2006
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Originally Posted by andyman97
Right but you're using kpro for the k20 swap. And stock rsx injectors are only 320cc.
you lost me on that one.. lol.. what does the kpro and stock injectors have anything to do what i have said... please explain.
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Old Nov 28, 2006
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well should be fine for people using AEM
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Old Nov 28, 2006
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Originally Posted by xproductionz
you lost me on that one.. lol.. what does the kpro and stock injectors have anything to do what i have said... please explain.
What I was saying is you are using the kpro for your k20 swap right? The point I'm making is on the d17, with the emanage, you can't idle an injector that's 440cc+ without throwing a baro sensor code.

But yes, with the aem, you can idle anything.

And as far as the hours of research, blah blah, Paul, you weren't even aware of this issue until I brought it to your attention. Otherwise, why didn't you warn me when I mentioned running 440's on the emanage?
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Old Nov 28, 2006
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Originally Posted by andyman97
What I was saying is you are using the kpro for your k20 swap right? The point I'm making is on the d17, with the emanage, you can't idle an injector that's 440cc+ without throwing a baro sensor code.

But yes, with the aem, you can idle anything.

And as far as the hours of research, blah blah, Paul, you weren't even aware of this issue until I brought it to your attention. Otherwise, why didn't you warn me when I mentioned running 440's on the emanage?


I did! Check this post sir and note the date of 8/17/04:

http://www.7thgencivic.com/forums/sh...highlight=baro

Your found out after I had told you it probably will not work on 9/5/05. Over 1 year later Andy.

Don't tempt me to find my UBER old data logs of this too.

Last edited by dezod; Nov 28, 2006 at 02:58 PM.
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Old Nov 28, 2006
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My bad. I seriously don't remember you saying anything to me about it. I found out June 05. I wish I would have known, would have saved me a hell of a headache back then.
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Old Nov 28, 2006
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Originally Posted by andyman97
My bad. I seriously don't remember you saying anything to me about it. I found out June 05. I wish I would have known, would have saved me a hell of a headache back then.
It's all good man.
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Old Nov 28, 2006
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i was running rc550 injectors for a couple weeks last year with no problems other then them hitting the tps and i never threw any baro codes with the e-manage
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Old Nov 28, 2006
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Originally Posted by abmerop18
i was running rc550 injectors for a couple weeks last year with no problems other then them hitting the tps and i never threw any baro codes with the e-manage
thats what im saying.. the guy that i did the same thing on his d17 running emanage isnt throwing a code either
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Old Nov 29, 2006
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so is it possible or not????
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Old Nov 29, 2006
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is it more possible i guess with the AEM...although i'd like to try with the modification of the tips....once you do this you can put the injectors back to 310cc correct? i don't have these injectors in front of me btw....thanks to anyone with some info
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Old Nov 30, 2006
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Possible? Sure. Probable that you'll get a CEL, I'd bet more times than not that you will....
The AEM will handle them fine. I am now running 750's and the idle is just as good as stock.
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Old Nov 30, 2006
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Originally Posted by bOoStEd042dr
is it more possible i guess with the AEM...although i'd like to try with the modification of the tips....once you do this you can put the injectors back to 310cc correct? i don't have these injectors in front of me btw....thanks to anyone with some info
how the heck would you get them back to 310cc when you are physically grinding off the bottom of the injector? unless you have some magic ungrinding tool, thats not going to happen. and like i said before, i was running 550cc injectors with no problem at all and no CELs while using the e-manage
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