It didnt really. I could get it to idle as far as AFR's but it was really wacky. Then again I was trying to use closed loop to make them work rather than just totally open loop it and use the Pro to take out even more fuel.

They will not work on gasoline on soley the stock computer in my opinion. I am sure there is someone that can and will prove me wrong but I spent and hour and 2 sets of plugs trying to make it work before i gave up, drained it and switched to E98.

I am not sure I follow you on the "feel"?

 

Can you please elaborate on the "really wacky" description? My "feel" question was referring to that. I'd like to keep the car in closed loop and let the O2 do it's job if possible.

Thanks for your input.

 

Ahhh...well okay now I got you. This is what it wants to do now keep in mind idling at 12.5 or so. When I had it on gas and closed loop I had the scaling at like 2300 to get it to idle at 14.7 or so (+/- 2 on trims) but as soon as you blipped the throttle to move it would go way rich (10.9) and then blubber and then slowly come back. Driving it like that it would want to cruise leaner than 18.0 AFR and then bounce rich.

Wacky in other words

 

Thanks for the explanation.

When you say "blubber" do you mean it'll bog or hesitate? Since the AFR goes so rich, the ECU tries to compensate by leaning out the fuel, then it notices AFR is too lean and it goes rich again, etc. eventually coming to stoich?

Have you driven the car while the engine hasn't been semi-warmed up? You get that hesitation during throttle tip in. Does it feel like that?

Thanks for taking your time to explain everything.

 

yes it would bog, hesitate, sputter, do all sorts of bad things. Closed loop + gasoline * 1600s didnt math out. Almost fails to on e98, but I can live with a rich idle when the cruise and WOT work so well.

 

Thanks for all your help! Now to decide...

 

Hey all, just got some FIC 850's. Anyone have any starting points for these injectors?

 

Ditto Buschur 880s?

Thanks.

 

to bump this older question. i used latency settings from earlier in this thread (i think) and they work out great:

FIC750's:

EDIT: scaled to 665

4.69v 3.312
7.03v 1.68
9.38v 1.2
11.72v 0.792
14.06v 0.72
16.41v 0.456
18.68v 0.36

STFT/O2 FEEDBACK are averaging 0.217 (10+ min idle/5+min log) on evoscan 2.5
I still have to log LTFT's, but my LC1 wideband always hangs around 14.3-14.7 on cruise. (callibrated many times and recently changed exhaust system)

to add, these injectors are very finicky with my 1:1 aeromotive FPR as they DUMP fuel as PSI rises. i had to basically get a cheaper stock-performing FPR to bring maps in-line with my WB02. this may be the case with all setups, but i only know my car.

also, as tephra said earlier, switch to larger more mainstream injectors that have a following here, as 750's are just too small for e85 and larger turbo setups.

again, great thread btw. sorry to intrude the monster injector discussion.

 

Thanks, here is my experience:

FIC 750 scaled to 696

Latency:

4.69V 3.312
7.03V 2.04
9.38V 1.296
11.72V 0.912
14.06V 0.792
16.41V 0.6
18.68V 0.336

Cruising between 14.1 and 14.9 on LC-1, FuelTrim low at -3.5% and mid at -2.7%.
I think I will try 713 as scaling. As a note I found FIC's more consistant in AFR readings and smoother than stock at idle. Maybe my stock injectors where not 100% ok...

I have a SARD fuel pressure regulator too (and 255 pump) set to 43.5 psi now. No strangeness in AFR.

For bigger injectors, I don't think I will upgrade to a very very bigger turbo, maybe a green or similar but I'm not looking for hi-rev preformance. With stock I were at 96% IDC, now I get 70.5% with 750s - enough room at this time.

 

cool. i'll continue my logs and then try your settings out. i have a SARD replica FPR-lol-at around 45psi. also, i forgot to add earlier my scaling was at 665. that would would be similar i guess to your 696 scaling with a .912ms 11v/.792ms 14v.

 

With 713 scaling I get -0.39% (low) and +0.195% (mid).

 

wow. nice. just for the heck of i plugged in your settings @696 and monitored my AFR's without touching my maps. the maps were closer to the actual afr's under boost (less rich). cruise was better too. transition is a little more harsh, but nothing crazy. i'll have to log when i get time as 'work' is busy. i'll try out the 713 scaling and go back to verifying my maps/afrs/idcs.

thanks for time, al.

 

850's here too. Anyone have a starting point? Thanks.

 

FIC 850's anyone???