i have a 98 sedan which i just swapped and boosted my engine. im pretty much ready to tune so something told me to check my injectors to make sure they fit seeing as how i want my tune to go as smoothly as possible.

i bought precision injectors, at first i was told they were 550's but after they told me they were 750's. (which i beleive they meant 780cc) but regardless they dont fit my clips for the wire harness

i was told that i do not need a resistor box is this true?

and ive been researching this and came across adaptor clips from phearable.net and they have 2 different types of clips so i got abit lost.

which clips are the ones id need?

 

contact phearable and ask?

 

attempted to, theyre closed today so ill call tomorrow.

 

You bought the injectors from whom?

 

a friend of mine's cousin owns a shop. they work on hondas and jetskis and they sold them to me. they were selling them for one of their clients that upped the boost and moved onto 1600cc injectors

 

try these: http://wire-worx.com/wireworx-jumper...s-to-obd2.html

 

If they're Precision injectors, they're 780CC low impedance. You can get pigtails for them directly through Precision.

 

yeaa thoose are like the ones on phearable.net although phearable was cheaper. but is still wasnt very clear cus it said to pick the type of injectors and the model i need. it said rc/precision-obd1-obd2

still unsure

 

i went on the precision website and found the pig tails, thats a nice option but i was looking for a simpler solution such as just adapters that connect into both the harness as well as the injectors. i dont really wanna have to splice and connect unless i truely have to. now if i was going to do it this way, would the pigtails get soldered into the harness or into the clips?

i assume itd be just cutting the original clip off and attaching these pigtails to the harness?

but the website said clips so it threw me off

 

Yeah, if you ordered the pigtails from Precision, you'll be cutting off the factory pigtails and soldering/heat shrinking the new pigtails on.

 

perfect! thank you you've been very helpful and if it doesnt fit, why not buy it from the same manufacturer to make it fit lol

also, just to be sure. you said these are low impedence.

so... resistor box? or no resistor box?

 

You can find all the fun information about low/hi impedance injectors here. Long story short, you need a resistor box, unless you want to fry your ECU.

 

thanks man ive been looking for something like that! it explained it in a very simplified form. thanks for all the help! now i know what i need to do


now on another note, this will be my first dyno experience.

what should i do in preparation for the tune?

i will be doing an oil change prior as well as new spark plugs at the tunning site, ive been checking my fluids and my cel is off, anything else i should check for?

oh and i also double checked all screws and bolts to be tight
(intake mani, exhaust mani, charge piping, turbo, bov, wastegate)
and hoses are all tight
(oil, coolant, fuel)

 

I feel like I just answered this exact same question last night. Make sure your CEL works and you have no stored codes. Make sure you have no fluid leaks. Personally, I would also do leakdown and compression tests to make sure the engine is healthy. Tuning and dyno time aren't exactly known for being gentle to an engine.

 

You have obd2 injector clips I'm assuming being 98. I just cut my injector clips off and soldered on Obd0/obd1 injector clips. Worked for my precisions here. And yes highly suggest a resistor box. Looks like a junk yard run for you lol

 

i only see 1 set of injector harnesses. not sure what where the confusion is...
http://www.phearable.net/shoppingcar...lips-p-90.html

save yourself $50 by going to the junkyard and cutting injectors clips off another obd1 honda. adapters are good if you need to convert back to obd2 (emissions/inspection). Otherwise you might as well permanently solder on the pigtails

Also, you need to know for sure what CC the injectors are before getting tuned. your tuner is going to need to scale the tune for your injector size. is there a part number engraved on the injector? it should be obvious the flow rate from the part#

 

whoa deja vu lol yeaa you posted this on my build thread

 

i was actually wondering what size they really were. took a look at them today and all they have on them besides the precision sticker are these numbers - 3027 17113738


help? im gonna research on my own but havent found much info witht these numbers

 

got em! theyre 525cc injectors. soooo my next question is this.


im tunning on E85 which is supposed to use more of the duty cycle of the injector an max it out quicker.

about how much hp should i be able to push with these?

 

^^

depends on your set up

 

correct my apologies let me rephrase this. how much hp would these be able to push before maxing out.

but regardless these are 50/lb an hour injectors, i just got off the phone with my local shop and they said theyll give me a nice deal. i think its pretty sweet, 120/lb an hour injectors (precision) the set of 4 brand new for 250

 

precision 525cc are high impedance so no resistor box needed.

525cc is only good for ab out 300-350whp on gas so maybe 250-275 on e85. thats just a rough guess. i'd get the bigger injectors. also import injectors are rated in cc/min not lb/hr. leave that for the domestic guys

 

the vendor stated the 120lb/hr so im guessing itd be 1200cc

 

yup. resistor box needed on those

 

Here, this'll make things easier for you. Also, unless you're doing a crazy build, those injectors are WAY more than you need.