ok, question....

i have the option of getting 720cc injectors OR 780cc injectors for my secondaries, but here's the catch, suposedly i need too get the 780's "custom" made too fit....

i wana run a BNR stage 3 at approx. 13psi, i will have every other supporting mod, only worries are the injectors....

suposedly i cant go bigger then 780's without having to custom a couple things, wana run the BNR on the 780's ( whichever ) for the time being....

i really want the Stage 3 because there's alot of potential with it in the car.... or should i stick with the stage 2 and be happy with that....

thanx!...

 

Well I have a BNR stage 3 and I am running 4x720s. I also have a fresh motor and a street port so I have not really got to see how well they work. As I have not been able to boost it yet. Anyway I had the stage 3 on my last stock motor and then I was running 2x720s and 2 890s. The 890s were in the secondaries (I got the 890s from Marren). Anyway I had to really set the SAFC in the neg and I think that was bad for my timing so this year I decided to go with the 4x720s. I have seen others running it and have heard of no real complaints. So far so god but so far no boost either LOL. By the way thats a sweet car!

 

thanx man!...

good to hear that i might be ok with 720's, though i think i might get the 780's " just incase"....

dont wana boost it completely nuts, just wana boost it 13psi, approx....

:P

 

How is adjusting the fuel delivery in the SAFC going to mess with the timing? The best way to use a SAFC is to use over sized injectors and detune it.

 

Yep thats the same setup I run. @ 17 PSI my Duty cycles are about 75%.

 

^ But you allso inject alchohal with a E6K. It is kind of misleading, dont you think he will see detination on pump gas at 17psi.

Archangels - did you finaly go FMIC?

 

hehe, graddy FMIC is on it's way and installed in about a week....

hehehe.... and i just wana run approx. 13psi, thats all....

J-Rat, what kinda 890's did you get and what did you have to do to install them into your car...?

 

Where in that post did I say to run 17 PSI? I was just letting him know that the fuel setup he has is solid, if not slight overkill, for the stage 3 turbo.

 

they are Marren 890s, same as the other guy has. They are a drop in replacement.

 

i have an S4 block with S5 externals, can i still find drop-in replacements...?

if so i might aswell get the 890's and tune them, hehe....

 

It sounds like you are stating that it is safe to go ahead and run 17psi with just the injectors.

The dood is runing a SAFC on your injectors. You add same setup at 17psi. Just makes it seem miss leading.

 

Why wouldnt you?

 

Nope, never said that. I merely stated that @ 17 PSI, my duty cycles were about 75%. You can interpret it any way you like, but I would never advocate 17 or more PSI on pump gas unless you are me!

 

because i was told i cant get anything above 780's that are a direct drop-in....

like i stated above, i have S4 block with S5 externals, can i get injectors that are a straight drop-in for it...?

if yes, where and do they have a site....

 

Well, what kind of wiring harness to you have? S4 or S5?

 

i believe S5....

 

I thought we covered this in your other thread already???

 

to an extent, this thread is to ask about another set of injectors, 780's....

and making this thread i've cleared up a few minor questions, so i figure it's all good....

 

i have my 750s in as primaries now and my 860s as secondaries... my only complaint is that at 3800 i can feel them switching over.... on the highway cruissing at 87mph that gets annoying.. its like a minor stutter... power delivery is smoother going up the band, i guess cuz i have clean/new injectors.....

 

hmm....

i just want to make sure i have enough gas to run approx. 13psi....

so with 860's you feel them come on?!?, thats kinda, weird.... and yes i can see it being annoying....

 

That stumble is most likely a lean spot that tuning will get rid of. I just spent some time over the weekend doing tuning out every stumble so that's how I know.

 

yeah.. that or something else.. my tach jumps around...... i think i need to clean the coil connections. i was running 13lbs with no detonation tonight by the way arch.... although my car heats up fast as **** with that stock IC....... lose it if you have a stage three(for anyonei know you are getting the greddy)

 

You're kidding right? The igntion timing is controlled primarily by the AFM just like fuelling is. Reducing the airflow signal with an interceptor is always going to have the effect of advancing the timing (or retarding it less). This should be known and understood by anyone using or recommending an AFM interceptor.