bluewater87

hey so i was trying to install the RC 370cc injectors onto my newly JRSC'd B18C5, and i noticed the physical shape of the rc 370cc injector where it goes into the manifold is much different than the stock injectors i have. We tried mounting into the manifold, but it wouldnt secure itself. the rc's are too narrow at the bottom, and then too wide in the middle. we tried using the rubber o-ring type a things, but still they dont secure themselves at all
I thought they would physically be the same size and slide right in no?

ALSO,
the rc injectors dont fit where they clip in to the electrical lines. The stock injectors have a much taller opening than the RC's. The male/female dont match up.

So whats the deal here? do i have the wrong type of injectors? or am i missing some parts for mounting or something?

please help

zman

i've never had a problem with RC injectors not fitting....unless they're for a k-series....but that would mean they don't fit into the fuel rail.

RC injectors use an obd0 style electrical clip, so you'll either need to buy the RC injector clips or just some honda obd0 or obd1 clips. If you use the obd0 clips there isn't anything else you'll need to do to make them fit. If you use the obd1 clips you'll need to cut off the little plastic peice in the middle of the injector (where the clip goes on) between the two metal prongs, its very easy to do, just use a sharp knife and cut the little tab off.

Just put the injectors into the fuel rail first, then slide the whole fuel rail/injectors into the manifold using the original manifold o-ring seals, they should fit, the fuel rail will keep them secured, after you put on the 3 10mm nuts that hold the fuel rail in place.

sikkkkktegra

sounds like your rc injectors are not honda specific.. my rc injectors fit in basically OEM. u may need custom seals and clips to make them work.

bluewater87

The RC injectors (the ones that dont seem to fit) that i have now are labelled "SL4-370"

Could someone throw up a link to the 440cc injectors that i need please

I searched 440cc on the RC eng. page and these are the results:
http://www.rceng.com/search.aspx?keywords=440
Saturated Injector SL4-0440 $ 88.75
Saturated Injector SL9-0440 $ 88.75
Saturated Injector SLG-0440 $ 88.75

zman

SL4-370's will work

my buddy is using SL4-0440s and they fit fine in both his b18b and his LSvtec.

FuzzyLS BRO

the only problem i had with my RC 750cc injectors fitting in was there was this stupid little divider, that woulden't allow the clip to click in, so i had to cut that away with an exacto knife.

zman

ya, you pretty much have to do that will ALL aftermarket injectors to fit obd1 clips, but its a very easy mod

bluewater87

maybe i have different clips? cuz my stock injectors have a much taller opening where it clicks in than the RC's. the 2 prongs in the clips go like this i believe: --
The distance above and below these 2 prongs is much greater in my stock injectors compared to the RC's.

could it be that i have obd2 clips or something?

Im gonna try and fit em in again tonight if i can make it out there.

zman

if using the c5 injectors, then you would have to have obd2 style injector clips on your engine harness.

bluewater87

so is there anything that converts the obd2 injector clips to work with the RC's?
OR do i need to get obd0 or obd1 injector clips?

Or do RC make obd2 style injectors?

Mike935

I have a LS JRSC with 440 injectors, you can get the AEM bosch style injectors from JRP for about 50 bucks

zman

i've used obd2 to RC style clip conversion harnesses that RC sells....i think they were like $80 for the set of 4 though.

Wiring up obd0 or obd1 style clips is very easy

bluewater87

There are 3 different style clip connectors

-Bosch Clip connector
http://www.rceng.com/Bosch-Clip-Connector-P66C9.aspx
-Honda Clip connector
http://www.rceng.com/product1.aspx?P...Category_ID=9&
-Denso Clip connector
http://www.rceng.com/Denso-Clip-Connector-P48C9.aspx

Is it the bosch clip connector I need?

I was thinking about getting 440cc’s, but then I thought if im going to get new ones, I might as well get 550s as they aren’t much more expensive. My end goal is ~300whp, so would 550s be a wise investment? Or would 440s be sufficient?

On the RC site, they have
SL4-0550 injectors http://www.rceng.com/Saturated-Injec...550-P31C6.aspx
And they also have
SL4-0550H (Honda style top) injectors http://www.rceng.com/Saturated-Injec...top-P60C6.aspx
The design is slightly different where it ties into the fuel rail and the manifold.
So is it the SL4-0550H (Honda style top) I need?

zman

you need the honda clip connector, but for $20 a peice, i'd just solder on the obd0 or obd1 style injector clips.

I'd use the 550s, its better to run an injector at a lower duty cycle, instead of maxing out a smaller injector.

bluewater87

so as long as the conductors form a closed circuit im good to go?

Mike935

440 injectors are more than enough fuel supply, plus with larger injector cc it make tuning much more difficult,
the injectors i have the percision turbo 440 and im using boch style connectors.

zman

tuning larger injectors is NO DIFFERENT then tuning stock injectors....unless you don't know what the hell you're doing.

If you want to make 300whp i'd use the 550s.

bluewater87

Im trying to get everything together this weekend, so Im just gonna rig up a way to complete a closed circuit between the injectors and injector clips.
I plan to get either 440cc or 550cc injectors for next season, and i just wanna get the thing running/tuned for now so i can get some driving out of it before it gets cold.
And I dont wanna wait/pay for the clips.

So I guess this tune is gonna be a pretty low key tune for now. gonna use the 370cc RC's, methanol injection, and stick with the crank pulley im using now (has no a/c or p/s so its pretty light)

Next season im gonna get 'er done right and get a nice exhaust, either 440cc or 550cc injectors, a nice aluminum crank pulley WITHOUT A/C or PS to put it at 11psi. (if i can find one) and maybe a couple other things if needed.

Mike935

consider a larger fuel pump, i went with a 255lph walbro, and a fuel pressure guage,
in most cases, tuners find larger injectors ARE harder to tune due to the base map of larger aftermarket injectors

bluewater87

i believe it has a larger fuel pump already. when im about to turn the car on, i turn the keys like a regular car, but i have a engine start button as well. So when i turn the keys over, i can for sure hear the pump.
I remember the guy i bought it off saying the fuel pump was upgraded.

Is fuel pressure something to keep an eye on?
Like i kept the fuel pressure gauge from my regulator under the hood so i can always look at it.
What could happen that would alter the fuel pressure resulting in a WTF?

zman

the fuel pressure will drop during a pull in boost if the fuel pump isn't keeping up. A fuel rail or fuel filter mounted fuel pressure guage is sufficient to keep an eye on while dyno tuning the car, but walbro 255's are more than enough for 300whp, so unless your FPR is taking a ---- the fuel pressure is usually pretty solid.

I've tuned so many cars with larger injectors its not funny. I'd say 85% of the cars I tune are not running the stock injectors and are using something at least double the size (CC's) of the stock ones. Once you get the injector size set and the offset(s) dialed in tuning them is NO different than tuning with the stock injectors. Unless you're using a crappy tuning software (crome, emanage, a vafc, something like that) larger injectors aren't an issue, unless you're dealing with an someone who really doesn't know what they're doing, b/c to me "tuners find larger injectors ARE harder to tune due to the base map of larger aftermarket injectors" doesn't make sense and if someone told you that, don't have them tune your car. The injector size is something you setup in the software before even thinking about starting the car to tune it, you start with a stock basemap, set everything up as necessary and tune from there....its really no different.

I've tuned cars with 1000cc injectors which is literally 4 times the size of the D and B-series injectors without ANY issues.