I recently purchased an fd that had a bad engine in it. I had the engine built and now I'm the final stretch putting this car back together. The only problem I'm running into is the fuel set up.

Right now I"m running 550 primaries and 1600 secondary injectors.

1st question:

The 550's are in the stock fuel rail, but I cant seem to figure out what goes between the fuel rail and the iron plate.

2nd question:

Is basically the same. I have an aftermarket fuel rail that feeds the 1600's but when I go to put the injectors in the have a little play with the given orings. I sent the injectors out to rceng. to get cleanned and tested and they sent me a little baggy with like 8 o-ring.

here is a pic of what I'm trying to build:






Does any one have a good picture of what I am talking about? I been searching for 2 days now trying not to ask this question, but I'm sure a lot of you guys know the answer.

Any help will be greatly appreciated. I cant wait to drive it.

Danny

 

there are grommets in the injector holes


I have two that I'm not using...13k miles on them and in perfect condition (note the picture is not the one I will give you). PM me if you want them. there is also a plastic piece that mounts under the rail and the block fasteners.

 

secondary rail has these 1600 injectors right now. Although they have that gromet on the end of the injector plug body it fits about 1mm too lose on the LIM. Is this right!!!!!!





primary rail:
what goes in between the rail and the iron?




If I'm missing something please let me know. I'm almost ready to start up this car, but being a newb to these engines sucks. I want to make sure I have done everything right the first time. Pictures or part numbers if i'm missing something would be greatly appreciated.

Danny

 

black plastic spacer goes between primary rail and iron..
for the secondary you can use some heater hose to help seal better search on 3rd gen forum..

 

I have read about the 3/8's fuel hose mod to make the injector a little more stable. Spacer like the one pictured on the sencondary injector.

Redrotor thanks for your input. The reason why i have asked this question is because i could not find the answer after 3 days of searching. Can you provided me with a picture of what you are talking about. I have a little bag full with gromets and o rings. I just can figure out how to put it together and make it work.

 

Most 1680's have a metal cap that seals them into the LIM. KG Parts sells them. As for the primary rail... Where the bolts go into the block itself there should be a plastic spacer that goes between the rail and the block. For the trumpets extending from the rail there is a seal that needs to be on each of them. On customers cars I've used an o-ring of proper size. Many times they get stuck in the block and people forget about them... Check in there! LMK if there are any other questions. My information is from experience not reading.

 

send me a pm if you need anything , im not 20 miles from ya , i usually check this every day . or send me a pm and i'll send you my #

by the way , what did you pay for this car ????

Hope you got a good deal

 

What do I need from his kit for the primaries?


and i'm guessing this would solve my secondary problems....

 

Yeah, those metal cups for the 1680's and you need the two seals going vertical in the upper right hand corner. You're welcome

 

a bit off topic but, what wheels are those?? brand, size, offset? they look great!

 

the spacer I mentioned is not on the picture.
it's same shape as where the 2 thread hole is on the iron.oval shape and has 2 holes.
ans top right 2 orings goes on ijector holes..

 

I had this covered

 

anyone have a picture of their top feed injetors mounted to their LIM. I want see what is its suppose to llok like.

 

A picture is only going to reveal depth. What problem are you having?

 

that's kinda what I'm looking for. The depth of the injector on the secondary rail. I used two grommets on the injector snd it seemed to fit real nice.

 

^ I don't typically like the double ring deal... As for the depth, they literally need to bottom out in the port for the LIM. Pretty much as far as they can go is the amount.

You know what you should just honestly do? Send the injectors to KG Parts for flow matching. At that same time Keith will install new o-rings and he can match the metal cup for the injector end. If you told him you were having mounting problems he could grab a spare LIM and try inserting them to make sure they are fitting properly before he sends them out. That's my opinion...

 

i've got a question..but it concerns the electrical connectors to the injectors. The connector for the original side feed injectors has rounded ends..where as my 1600 top feeds has more square ends, and the connectors cant slide over..what do you to make it work?

 

By the way on the injector space issue..i think the manufacturers of the rails made them too far of LIM..i dont like the idea of the double o-ring either..but thats the only way i saw to get them in fitting snug. Other than that...i would make new brackets or reshape thme to make them shorter.

 

ok...so I'm not the only one who has tried doubleing up the grommets to make the injector fit. i will snap some more pictures to aid any on else. I tried doing a single grommet on the injector, sliding it into the lim, but the original fuel rail bracket was too long and it would not fit down on the injector. I either have to double up on grommets or make a new bracket to make the rail and injectors come closer together. I am trying to go about this the safest way, so this car is as reliable as possible. I will snap pictures of the process.

 

You're not the first person to be in your situation. However, if you're looking for reliability I don't think any amount of rubber parts are going to be what you're looking for. Might as well use spit and bubblegum IMHO.

I haven't made these in a little while but I have the dimensions on the bottom of the page. These are what others are referring you to use. Find someone with a lathe, bring him these dimensions and have them turn you a pair. I may have a few pairs sitting around if you can't find someone. I know that Jason sells them through the rx7store.net and so does KGParts.

http://dave.newbern.org/rx7/InjectorBushing/


Take it for what it's worth.

Dave

 

http://injector-rehab.com/outpatient/electrical.htm

item number 6-200 OR 6-201 if running a PFC. If you want to add clip and/or resistors yourself, just need 6-104 or 6-105
6-104 has the "push release" style sides and 6-105 utilizes the c-clip style (some people hate these). If in the www.kgparts.com primary rail, you must use the 6-105 style due to the close proximity of the injectors to each other.

Hope that helps....

 

Another question..If i am running a Microtech Lt8 with 1600 top feed injectors..do i need resistors?

 

NO! Microtech you do not need resistors. I have a set of metal spacers if you need pm me. G

 

CJ's has theirs available they should seal much better than the mentioned alternatives. Plus the price is not much more than kg's or 7store.

http://www.cj-motorsports.com/cat022.htm

 

It also looks like the CJ parts will raise the height of the injector. If the rail that you're using isn't adjustable enough to compensate you'll need to shim it up. This may cause clearance issues.