Wargasm

Hello,
I am installing the new fuel rail with 1600 cc secondaries that k2rd sells, and I have a minor issue. The injectors don't seem to poke down into the manifold far enough.
Do I have to remove the plastic caps on the tip? Do I have to remove the rubber grommet and fuel atomization plate from the manifold to make it work?
One more question, the new fuel rail does not have a fuel temp sensor.... should I just leave the stock connector dangling or do I need to put a resistor or something in there to fool the computer (PowerFC) in some way?

Thanks,
Brian

93 T04S
87 TII

R-magic

If it's anything like the RP kit. You should remove the rubber grommet and the diffuser. The diffuser is to help the fuel atomize. It sits inside. Use a pick or something to pull it out. The bottom of the diffuser needs to be cut off. Only the top of it is use. Then drop the diffuser back down. The injectors should sit down better. The connector for the sensor is no longer needed so just leave it.

Badog

Thank you, Vila!

Jason

iTrader: (5)

With the K2RD rail you have to remove both the grommet and fuel plate or the injector wont sit correct.

Jason

shawnk

Yea I removed them both completely. Then used a sliver of 5/8" hose (some people use 3/8" hose but it seemed a bit small to me) and made a custom insulator to seal at the bottom of the injector to the manifold. I have done 2 of these in the last 2 weeks so pm me if you have any questions and I will send you my phone number.

Shawn

rxrotary2_7

yeah, shawn has done a couple recently and has a good explination of the process and some pics here. really nice guy and if he is offering to help, take him up on the offer. https://www.rx7club.com/forum/showth...hreadid=174768

rxrotary2_7

*edit* nevermind i will email you shawn.

jspecracer7

I did the exact same thing, except I stuck a tranny bolt into the diffuser to pull it out.

Best to leave the diffuser in...it's there for a reason

shawnk

I am not sure if I agree with "Best to leave the diffuser in...it's there for a reason". It is a diffuser and if you cut the bottom of it becomes just a spacer. The plastic on mine was getting pretty fragile with the heat cycling. I am glad to have it out. And another thing - some ecu's require the sensor be plugged in I think. Best thing is to leave it plugged in and zipped tied somewhere or I have heard of people doing a resistor there. The last thing I would recommend is changing the fuel temp settings if you have a powerfc all 3 settings to 1.0 (datalogit required). It seems that the ecu makes an adjustment based on the temp of the incoming fuel. This is all stuff i have come across in my searches but makes sense to me so I did it this way.

Shawn

Turbo1

I'm confused by this install. I put my secondaries in today, and fabbed up a rail as well. I encountered the diffuser thing, which I pulled out. The injectors I recieved from Keith already had orings on them. The Orings fit snuggly into an aluminum injector boss I had sitting around, which had a .520" diameter. The inside of the manifold has small lip, but barely wide enough for the oring. Not to mention the oring didn't fit down in it, because it was to thick. I drilled out the small lip inside to .520". Ok, now the injector fits, BUT the lip is so thin, that with the Oring centered up and down, it protruded out the bottom and top.

My solution was to drill out the entire hole, and fit an aluminum injector bung at the proper height, so I knew the injector was seated correctly. Welded it in, and wala, my injectors fit.

What do I do on the primarys? A thinner O-Ring and a piece of hose?!!?!? Sounds kinda hacked to me?

the_glass_man

iTrader: (2)

Are you upgrading the primaries as well?

Turbo1

Yea, I need 720's in there. I'll be near the car in an hour, I have some ideas. But shimming the injector with a piece of hose so the Oring would fit on a .125" wide seat doesn't seem like the "right" way to do it.

Snook

iTrader: (12)

r-magic answered this but im not sure if its clear to you
you dont need the fuel temp sensor at all so just cut the wiring as close as you can to the harness and heatshrink the tips of each wire so they dont short out.

keiths kit comes with insulators to go inside the lim for the injectors. kinda sucks to not have those

shawnk

Well they have lasted 6 months on my primaries. I did get a set of keiths metal insulators for the secondaries and am looking forward to getting the ones for the primaries in.. (hint, hint).

Shawn

rx7joe

iTrader: (10)

I can't seem to find the link but I beleive a member named Dave Newburn was making a set of aluminum sleeves that are inserted into the enjector bungs so that you could use the O-rings the way they're meant to be used. I bought them and they seem to work pretty good. I trust them much more than I would a peice of hose. Maybe search for his name or something.

Greg

Turbo1

So Keith has simply made up a metal sleeve that press-fits into the injector port, which then seats/seals with the oring properly?

Turbo1

I'm confused, and now frustrated all to hell.

The diffusers that came out of my motor have a oring in the middle of the seat. My injectors which I purchased from keith came with orings. EVEN IF I remove the orings, the tip of the injector has NO CHANCE of fitting inside the diffuser.

Cutting off the end of the diffuser has nothing to do with it, the tip of the injector wont fit inside at all, so removing the bottom part of the diffuser does nothing for clearance.

The intake for me was doable, as I machined out the boss, and welded in a proper injector bung inside the manifold. Now the injector seals as it was designed.

The primaries are whats bugging me. I can't weld to them with the motor together, nor can I obviosuly machine on the center housing. I could make a sleeve and press-fit it on/devcon it.

I'm just completely not understanding this whole use more orings/piece of hose idea. Makes no sense to me whatsoever.

Turbo1

Update - Motor is a 91 GTX motor. I've conquered the secondary injector problems. I'm having issues with the primaries now. 720CC. Same injector body, same tip size, same damn problem- to big. I could(again) make up a bushing and press it into the housing, but the injector would sit up kinda high. I don't want to screw up the angle, if thats an issue??

rxrotary2_7

Theo, calm down buddy. Can you call me tomorrow? If not, then Monday.

atihun

Where can I get a set of the metal sleeves for use with Keith's rails (720 primaries and 1600 secondaries)?

Thanks.

Turbo1

you gimme a number and tell me who to ask for, I'll call