Euro R intake manifold + RDX injectors
06-03-2014, 12:44 PM
#1
Honda-Tech Member
Thread Starter
Euro R intake manifold + RDX injectors
Just bought an Euro R intake manifold. It comes with everything except the throttle body. Include injectors, fuel rail, IAT, EGR (which I will use the block plate), IACV (I think it can't be used).
1. What do I need to install the RDX injectors?
2. Will the RDX injectors just fit on the Euro R fuel rail and manifold or I will need other fuel rail or "injector hats" like for B18?
3. Which throttle body will be better/easier, Type-R or S2000? Please comment about the difference or difficulties using one or the other. Found one for S2000 cheaper.
3. The largest TB for this manifold will be 68mm?
http://www.ebay.com/itm/251404078274?_trksid=p2055120.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
P.S.
How to add images?
1. What do I need to install the RDX injectors?
2. Will the RDX injectors just fit on the Euro R fuel rail and manifold or I will need other fuel rail or "injector hats" like for B18?
3. Which throttle body will be better/easier, Type-R or S2000? Please comment about the difference or difficulties using one or the other. Found one for S2000 cheaper.
3. The largest TB for this manifold will be 68mm?
http://www.ebay.com/itm/251404078274?_trksid=p2055120.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
P.S.
How to add images?
06-03-2014, 10:20 PM
#2
Honda-Tech Member
Re: Euro R intake manifold + RDX injectors
Just bought an Euro R intake manifold. It comes with everything except the throttle body. Include injectors, fuel rail, IAT, EGR (which I will use the block plate), IACV (I think it can't be used).
1. What do I need to install the RDX injectors?
2. Will the RDX injectors just fit on the Euro R fuel rail and manifold or I will need other fuel rail or "injector hats" like for B18?
3. Which throttle body will be better/easier, Type-R or S2000? Please comment about the difference or difficulties using one or the other. Found one for S2000 cheaper.
3. The largest TB for this manifold will be 68mm?
1. What do I need to install the RDX injectors?
2. Will the RDX injectors just fit on the Euro R fuel rail and manifold or I will need other fuel rail or "injector hats" like for B18?
3. Which throttle body will be better/easier, Type-R or S2000? Please comment about the difference or difficulties using one or the other. Found one for S2000 cheaper.
3. The largest TB for this manifold will be 68mm?
You will need a few things to run rdx injectors. You will need a new fuel rail for k-series injectors, and as well as the injector adapter for the manifold itself. Im not sure if the manifold hats are the same for both H and B series? Id assume there both the same, but I cant say for certain.
The Euro-r has a 2 post fuel rail, USDM rails are 3 post. So you will need a two post rail, or a USDM 3 post rail and a 2-to-3 post adapter.
You will need a JDM-to-USDM IACV adapter and use a usdm IACV, "2-pin". Preferably a aftermarket fuel pressure gauge.
Any D, B, F, or H series throttle body will work for it. Yes 68mm is the biggest you can go without porting.
You will also have to run a usdm gasket and block off the air holes above the injectors on the surface that mats with the head.
If you are trying to put on a P13 head that manifold will need very slight grinding on the flange to sit flush on the head.
RDX use BOSH injector clips, you will need jumpers or pigtails.
Last edited by Sparksman; 06-05-2014 at 12:44 AM.
06-04-2014, 07:44 PM
#3
Honda-Tech Member
Thread Starter
Re: Euro R intake manifold + RDX injectors
You will need a few things to run rdx injectors. You will need a new fuel rail for k-series injectors, and as well as the injector adapter for the manifold itself. Im not sure if the manifold hats are the same for both H and B series? Id assume there both the same, but I cant say for certain.
The Euro-r has a 2 post fuel rail, USDM rails are 3 post. So you will need a two post rail, or a USDM 3 post rail and a 2-to-3 post adapter.
You will need a JDM-to-USDM IACV adapter and use a usdm IACV, "2-pin". Use the euro-r throttle cable bracket. Preferably a aftermarket fuel pressure gauge.
Any D, B, F, or H series throttle body will work for it. Yes 68mm is the biggest you can go without porting.
You will also have to run a usdm gasket and block off the air holes above the injectors on the surface that mats with the head.
If you are trying to put on a P13 head that manifold will need very slight grinding on the flange to sit flush on the head.
RDX use BOSH injector clips, you will need jumpers or pigtails.
The Euro-r has a 2 post fuel rail, USDM rails are 3 post. So you will need a two post rail, or a USDM 3 post rail and a 2-to-3 post adapter.
You will need a JDM-to-USDM IACV adapter and use a usdm IACV, "2-pin". Use the euro-r throttle cable bracket. Preferably a aftermarket fuel pressure gauge.
Any D, B, F, or H series throttle body will work for it. Yes 68mm is the biggest you can go without porting.
You will also have to run a usdm gasket and block off the air holes above the injectors on the surface that mats with the head.
If you are trying to put on a P13 head that manifold will need very slight grinding on the flange to sit flush on the head.
RDX use BOSH injector clips, you will need jumpers or pigtails.
2. Any K-Series fuel rail will work? The distance (separation) between injectors is the same as the H-Series?
3. Fabricating an adapter to fix the fuel rail to the two post on the manifold wont be a problem.
3. Already have an aftermarket fuel pressure regulator...
Anyone can confirm if the injector "hats" ae the same for the H-series as the B-series. Can use B-series injectors in H-series fuel rail without any modification?
06-05-2014, 12:28 AM
#4
Honda-Tech Member
Re: Euro R intake manifold + RDX injectors
1. Are those plugs (shown in picture) what you mean with "jumpers or pigtails" to connect the injectors?
2. Any K-Series fuel rail will work? The distance (separation) between injectors is the same as the H-Series?
3. Fabricating an adapter to fix the fuel rail to the two post on the manifold wont be a problem.
3. Already have an aftermarket fuel pressure regulator...
Anyone can confirm if the injector "hats" ae the same for the H-series as the B-series. Can use B-series injectors in H-series fuel rail without any modification?
2. Any K-Series fuel rail will work? The distance (separation) between injectors is the same as the H-Series?
3. Fabricating an adapter to fix the fuel rail to the two post on the manifold wont be a problem.
3. Already have an aftermarket fuel pressure regulator...
Anyone can confirm if the injector "hats" ae the same for the H-series as the B-series. Can use B-series injectors in H-series fuel rail without any modification?
2- Im pretty sure any K series rail would work, Ive heard of people using oem K rails. Not sure about if spacers are needed or not. Or their fitment issues with oem, never looked into too much.
3- Just buy one... Or buy a 2-post rail like I did. Having your injectors seated properly is sort of important, dont half *** it with some home brew adapter.
4- Denso rated these rdx to have two CC ratings 410cc @ stock psi, and 550cc @70psi You will need a bigger fuel pump to run that high full time.
Check out Rosko Racing, he has all the stuff you need. I didnt get the manifold through him, but I got all my euro-r/rdx stuff from there.
Here is a pic of mine--vvv PS you might need a new throttle cable bracket, you need one like mine for it to work properly. I forgot the oem brackets have issues with the throttle cable, which was the reason I bought a new one. Forgot until I seen my photo lol.
Last edited by Sparksman; 06-05-2014 at 12:55 AM.
06-23-2014, 10:22 PM
#6
Anti-GDD White Knight Simp
Re: Euro R intake manifold + RDX injectors
Over 550 CCs arent needed unless it's a seriously built motor. At that point, you'll want Injector Dynamics or Grams, not denso
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06-24-2014, 07:35 AM
#8
moderator emeritus
Re: Euro R intake manifold + RDX injectors
there arent dual stage. with additional pressure, yields a larger quantity of fuel injection capability. meaning the size, per sae, will progressively grow with additional pressure.
06-27-2014, 04:46 AM
#10
moderator emeritus
Re: Euro R intake manifold + RDX injectors
No, fuel pressure can just increase the working size of an injector working at 100% duty cycle. Meaning an injector working at its max potential and staying open as long as possible. If you increase pressure, you are increasing the flow of fuel flowing through the rail thus the injectors.
Injectors work like a garden hose valve, in a very very simple sense. if the injectors are fueling idle, it's like barely cracking the valve open.
Research speed density. This is the type of system our ecu uses. Also research how injectors work. They are not an on/off switch where it's either full blast or off. The opening and closing procedure of the injector is individually controlled by the engine computer.
Injectors work like a garden hose valve, in a very very simple sense. if the injectors are fueling idle, it's like barely cracking the valve open.
Research speed density. This is the type of system our ecu uses. Also research how injectors work. They are not an on/off switch where it's either full blast or off. The opening and closing procedure of the injector is individually controlled by the engine computer.
06-27-2014, 05:21 PM
#11
Anti-GDD White Knight Simp
Re: Euro R intake manifold + RDX injectors
^^^I know all this. But with your previous comment, it sounded like you were saying that the RDX injectors could reach 550cc, with the increase in fuel pressure. Wonder where he got that 550cc rating from? I've only heard them rated at 410cc
06-29-2014, 06:45 AM
#12
Honda-Tech Member
Thread Starter
Re: Euro R intake manifold + RDX injectors
Received my RDX injectors.
Yes, you need the "hats" to fit on H22 fuel rails, just any older D or B series.
I will be using Euro R fuel rai which came with two bolts mounting, but will need longer bolts than stock.
Definitely you have to work on the Euro R manifold to make them work properly. If not the RDX injector will be too "deep in the hole" very shrouded.
Pics:
1. RDX injector on euro r manifold. Stock. Look how deep it fits.
2. RDX injector on stock H22 manifold.
3. RDX on euro r IM after some work. Its not finished yet.
Yes, you need the "hats" to fit on H22 fuel rails, just any older D or B series.
I will be using Euro R fuel rai which came with two bolts mounting, but will need longer bolts than stock.
Definitely you have to work on the Euro R manifold to make them work properly. If not the RDX injector will be too "deep in the hole" very shrouded.
Pics:
1. RDX injector on euro r manifold. Stock. Look how deep it fits.
2. RDX injector on stock H22 manifold.
3. RDX on euro r IM after some work. Its not finished yet.
06-29-2014, 05:55 PM
#13
Honda-Tech Member
Re: Euro R intake manifold + RDX injectors
Here is a link to K-Tuned stating the two ratings
http://www.k-tuned.com/blog/products...rdx-injectors/
Her is a informative thread on RDX injectors, his flow chart only went to 58.8-psi @ 510cc.
http://www.onecamonly.com/showthread.php?t=1895
06-29-2014, 11:26 PM
#15
Honda-Tech Member
Thread Starter
Re: Euro R intake manifold + RDX injectors
Also want to share my way on how to match IM with head. After matching hondata head gasket with head port, place the hg on head, and use paper, doble tape an a pencil. Don't saying that the experts do the same...
06-30-2014, 04:24 AM
#16
Honda-Tech Member
Thread Starter
Re: Euro R intake manifold + RDX injectors
What did you use to seal the injectors on intake manifold? The orings that came with and the other black one?
When I put the injector on the manifold it seems that the orings on the injector wont seal properly. The hole on the manifold a bit larger than what is needed.
When I put the injector on the manifold it seems that the orings on the injector wont seal properly. The hole on the manifold a bit larger than what is needed.
07-01-2014, 11:05 AM
#17
Honda-Tech Member
Re: Euro R intake manifold + RDX injectors
I also removed some material around the bottom of the injectors. It isnt 100% needed, but does help prevent fuel build up.
Have you figured out how your going to block the injector air holes yet? If you are going to drill and tap I would get around to that and clean out the metal shavings before installing adapters. There are other ways if you installed already.
07-01-2014, 11:24 AM
#18
moderator emeritus
Re: Euro R intake manifold + RDX injectors
Rosko Racing makes the injector boss adapter seals which will properly, centrally locate the injector and seal it.
07-08-2014, 12:19 AM
#21
Honda-Tech Member
Thread Starter
Re: Euro R intake manifold + RDX injectors
Perfect fit of the RDX injectors with the adapters by Rosko. Have to remove a bit more from inside of the intake.
Last edited by gmcuajo1; 07-08-2014 at 05:41 AM.
