has anyone else used these latencies and what were your trims like?

 

They're both modified versions of the same Delphi injector. I did some benchtop latency measurements for FIC on a series of their Delphi-based injectors starting from a stock Delphi up to a modified Delphi that flowed at 1600 cc/min. As the flow rate went up, so did the latency. The FIC 1150's will have roughly 5% higher latency values than your FIC 1050s. Start by multiplying your current latency values by 1.05. Multiply your FIC1050 scaling value by 10%. That should get you pretty close.

 

Yeah I used them. Both the scalings and latencies were way too low. See this thread for good PTE 1000 values https://www.evolutionm.net/forums/sh...d.php?t=366603

 

Thanks I replied to you in that thread.

 

Thanks for the info. Have you tested the new injectors (1250cc up to 1850cc in 100cc increments) that will be coming out shortly? I emailed Jens and he mentioned those as other options. If you did test them, will the % number go up linearly as the CC's increase?

I might go with either 1350 or 1450, but the only concern I have is making them work on both 91 pump and E85. I don't know how large the stock ECU can handle, but I've read that RC 1600cc's won't work.

 

He didn't give me any of those to test. A linear increase in the scaling and latency numbers would be a good first step. I could make up plot showing the latency values as a function of flow rate.

 

Thanks for the suggestion. If you have spare time, that plot would be great.

Now to figure out the largest injectors that would work "normally" on the stock ECU and pump gas.

 

FIC 1600's do not function on the stock ECU without help on E85...and definitely not on gasoline. These new generation injectors may work better though, I dont know.

1200's were easy to scale on gasoline, so I would think that depending on the spray pattern at 1.28-1.536 ms the 1350s might work on gasoline. On E85 you could probably squeeze the 1450s. Hard to say until I have a set to look at and try to scale.

 

Would anyone have the scaling/latency settings for PTE 1200cc injectors.

Thanks in advance...

 

Thanks for your input. Trying to figure out what the largest injectors the stock ECU can handle "on paper" is hard. I'd definitely love to test out the 1450's but it would be an expensive experiment if they don't work on 91 pump (shouldn't be an issue on E85).

Let's see. I believe mrfred used these values for his 1050's
11.72 = 1.224
14.06 = 0.912

So, going from 1050 to 1450 would be a difference of 4. Thus, 4 X 5% = 20%
11.72 = 1.4688 (1.2 X 1.224)
14.06 = 1.0944 (1.2 X 0.912)

Looks real close there. So you think anything over 1.28-1.536 ms wouldn't work on the stock ECU (on gas)?

Are you referring to RC 1200's? Those flow at 1090cc @ 43.5 psi (1200cc @ 55 psi). Not sure why RC lists them at 1200cc when the standard is 43.5 psi.

 

PTE 1200s actually.

The 1.28-1.536 ms is the minimum pulse width that Evoscan reports so I use that as my bench mark for latency and scaling effectiveness vs injector size. Another way to think of it is shot per squirt I guess. With the 1600 shooting 25% more it means you have the much less control at idle. Cruise is pretty easy as is WOT, but the idle is the killer.

Even on E85 my car wants to idle mid 12's and thats taking an extra 25% fuel out via the MAFT Pro I use for speed density conversion.

 

JB, i want to be just like you when i grow up and get big

 

But I'm just a little guy

 

Just means im getting closer i guess

 

Wow, thanks for the info.

So how do the car idle on pump gas with your 1600's? What would it be similar to in terms of "feel"?