111mattin111

Hi guys anyone running a similar setup on here
Just fitted my new fuel system which consists of
Xcessive LIM with x4 1650cc spliced into seconaries
750cc primary
Twin aeromotive 340 pumps

What was you Idling and cruise like on these Injectors, any stuttering or idle problems?

fendamonky

iTrader: (6)

What did you change other than the injectors, and if you changed primary injectors did you adjust the map to account for the different primaries?

Your secondary injectors should have absolutely no bearing on your idle quality since they shouldn't be coming on line until higher in the rpm range.

If you're having a poor idle with 750cc injectors you've either got shitty injectors, or your tune needs work (or both).

RGHTBrainDesign

Huh?

Could you at least read some of the beginner articles before posting in here all half-cocked? Similar to what? You're changing injectors with what ECU to control them? Who's your tuner? Which Wideband o2 Sensor Controller did you install and is it directly fed into the ECU so it knows how to compensate for any closed loop fueling?

The rest of your post doesn't belong in the Single Turbo - Tech and Performance Section without more information. If you're looking for handouts, it's a lot easier to actually get what you're after by explaining yourself.

111mattin111

My bad for half hearted post but no need for the arsey reply but I guess there's always one

It's not running yet will be going for mapping once all complete, primary injectors are Bosch 750 top feed EV14 1650cc x4 secondary, running Haltech elite 1000 half bridge turbonetics single turbo, I was just wondering if anyone was running a similar fuel setup

Howard Coleman

iTrader: (6)

you have fuel for 760 rwhp.

81% of delivery will be from the secondaries so it will be a bit of work getting them to properly transition w the primaries.

adding to the challenge is that the dynamic valve on your injectors is 5 time the weight of the newer EV14 injectors. if you do have problems as to staging you might switch to the EV14s.

what specific turbo?

111mattin111

Thanks for the reply this was the kind of answer I was looking for.

That's what I've just fitted the new EV14s 1650cc x4 full function secondary rail -8 fuel lines feeding -6 return
The turbo is turbonetics T69 don't have the spec to hand but looking at possibly a EFR 8374 1.05ar EWG

RGHTBrainDesign

This WAS a waste of 43kB on someone's server, but now you're at least attempting not to be a spoon-fed *******, and that makes me smile.

That being said, spliced injectors would mean half the amperage to each injector, which is a shame. You could have just as easily run a 3-stage injection using two more injector drivers from your ECU and not suddenly DUMP fuel as the secondaries all open up.

On the ESP software, I'd try bringing up the duty cycle of the primaries to about 90% to attempt to smooth this out, since your secondaries are essentially being treated as 3300cc/min injectors, or possibly bleed off fuel pressure intentionally to decrease flow output. The possibilities on this are endless and I'm sure you can figure something out.

Post your current Elite 1000 Map and hopefully one of the Haltech specialists can chime in. Obviously modeling the injector as per manufacturer specs at a given fuel pressure is important. There are tuning strategies used to eliminate the bullshit drivability issues that many lesser-tuners fall into with the Half-Bridge setups since your MAP signal isn't nearly as smooth as a stockported motor. Other than that though, you're still missing a lot of information in which the generous people of this forum need so they can help you out.

Progress though. I love that.

111mattin111

The cars not up and running yet just waiting on the last few parts, I was just wondering if there would be any problems I may encounter,
I will look into running the 2 addition injectors off of drivers if this is the best way of doing it.
The car was recently running but over the last few months I have refreshed and updated most parts,
Hopefully I'll hit over 600hp that's the aim, oh I don't expect to be spoon fed, I research every part ect before diving into it so as to get the best setup

111mattin111

So spoke to Matt at Haltech he's said the only way to run the 2 extra injectors on the 1000 is to splice into the original secondaries.

RGHTBrainDesign

That's true, but did he advise you on how to drive them in the "Current Settings" and double your normal high impedance settings to account for the 4 injectors on those two injector drivers (Go Custom Here).

Give Matt a call and see what he says is the maximum allowable for your Elite 1000 for constant duty aka "Hold Current" (probably 2A) with a peak of 8A. See what he says if you run that driver at 4A split into 4 secondary injectors, and your primaries at 2A so all six injectors are effectively getting 2A.

fendamonky

iTrader: (6)

Not sure if you mentioned this already... What is your ultimate power goal? I can't help but think that you are causing unnecessary complication by trying to dramatically overshoot your needs.