ok so i have a 99 civic si with a greddy turbo kit
my question is what size injectors should i get? i also dont understand the resister thing and also the injector clips? i search but didnt get any basic info....

thanks guys

 

If you dont understand it then get RC 440cc or 550cc saturated injectors depending on how much power/boost you are looking for

 

will i need to buy clips?

 

no, you may have to trim a part but thats about all (I cant remember right off the top of my head but they should be p&p)

 

do you know y people need to use resistors?

 

You need to have a resistor box when running Peak and Hold injectors. If you are running Saturated then you dont need a resistor box

 

here is something from another site that will explane it alot better

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">There are two basic types of injectors that work on Honda and acura cars. How they operate are totally different. Let's take a look.

Peak and Hold:

Peak/hold injectors are low impedence, usually in the 1-4 ohm range. When the ecu calls for fuel to be injected, it sends out voltage via the wire clips until a certain current level is reached (the peak part) (varies by injector size, company). For the duration of 1 pulse width, that current is slightly reduced and held (the hold part).

Advantages of this design:
minimizes the injectors "on" time, resulting in faster response
Disadvantages of this design:
increases coil heat, which can lead to failure over time

--------------------------------------------------------------------------------


Saturated:

Saturated injectors are generally higher impedence than peak and hold, running in about the 10-15 ohms range. Unlike peak/hold, a saturated injector remains "on" for the entire pulse width.

Advantages of this design:
reduces heat
Disadvantages of this design:
slower response time
can't handel large CC or lb/hr styles due to limitations in its speed.

--------------------------------------------------------------------------------


So, which should I choose?

There are a ton of factors involved in this.
First, power level. If you're going big, there simply won't be a saturated injector that will support your power level. The largest common saturated injecotrs on the market are 550cc, with 440cc being a common "cap" in saturated size. Most boosted people run peak/hold setups for not only their availibilty, but also their ease of upgrading later on if so desired. simply swap the injectors. no need to re-wire again.
How is your car wired? most obd0 civics and some preludes are wired for peak/hold and have a resisitor box already. No point in changing to a saturated. Obd1+2 civics, and most other honda/acura cars after 1992 are all saturated and are not wired with resisitor boxes. Again, if there is an injector availble in your power range for flow of your car's design type, there's little sense to change.
Price. DSM eclipse/talon 450cc peak and hold injectors fit honda rails and with just a minor modification plug right in. best of all, these can be had for about $50-75 a set of 4 instead of $350+ for a set of aftermarket injectors. Add a $25 resistor box from an obd0 civic/crx, wire it up, and you're good to go in you're saturated car.
</TD></TR></TABLE>

 

ok...thanks so much for the info

 

Here are rc injector clips that I plan on buying for my rc550's saturated.

http://www.kingmotorsports.com...at=70

20.00 each but I don't want to cut my harness in any way.

They also have B&M fpr. You have to cut your stock one but for price and adjustability they are pretty good. DSM 440's would be good but if you get rc's I would get 550's minimum so you have a little extra for upgrade or pushing more psi down the road. Plus they come with a flow sheet for each injector.

I would also upgrade you fuel pump with at least a walbro 255 high output.

And if you look around you can usually get rc's for under 300.00 shipped brand new.

 

good info...i just dont wanna pay 80$ for clips

thats alot

 

Alright I was in the same boat like three months ago. I have a 98 gsr with the b18c1 boosted on a brand new big 16g. What you do is buy a set of 2g dsm 450cc's. Im sellin my set if you want them. These injectors are peak-hold. The ones that are in your car are saturated. Well you need to convert it from peak-hold to saturated. Go to your local radio shack and buy 4 of 10ohm 10watt inline resistors. Then go to http://www.homemadeturbo.com and look for turbo projects they tell you exactly how to wire them up correctly. Or if you want a saturated system then buy some rc 550's.

 

Also if your going to go rc 550's you dont have to pay $80 bucks for the clips. Just go to your local junkyard and get some obd1 injector clips they are the same exact thing, and youll save like 70 dollars.

 

haha...thanks man junk yard it is! cause im trading my ctr cams for some turbo stuff including rc 550cc injectors

 

Yeah no probelm. To answer your question on why do you need resistors on a peak hold system. Its because you need to control the amount of current going in to the injector wires. If too much goes through you end up with a fryed ecu. See the saturated injectors hold their pulse. When your converting them the resistors slow that current down thats why you need resistors on a peakhold system. The resistor box is old school to me. Inline resistors are in

 

https://honda-tech.com/zerothread?id=1803089

Kinda off topic but good info on resistors.