Fuel Injectors Tuning (NGC4)

[Kandiry]

Hi everyone,

I have a question regarding Gen3 Hemi fuel injectors. My current injector DC is well over 80% (88-93) on WOT pulls which from what I understand is not "recommended".

Q: Should I swap my stock injectors for a DW 525cc? Note: I plan to go for LT headers and a cam soon.
If yes, how are the new injectors tuned/dialed in? These PCMs do not have an InjPW Vs Fuel Mass tab on the Editor.

Any ideas/suggestions for my case, assuming I need to go for bigger injectors?

Final.hpt

[james1595]

You could just get some used 392 or hellcat injectors for pretty cheap. As for the tuning, can you post your file, i might be able to help find the parameter

[f.creek-ranch]

I agree with this…
Injectors from 392 are easy to dial in.

You can run injectors up to 100%, not the best but it works.
Otherwise you can raise fuel pump voltage/loss

[Kandiry]

Hello James,

I was thinking about getting the 6.4 Injectors actually, and now you've made up my mind lol

You can find the tune file on the first post Thanks!

[Kandiry]

I agree with this…
Injectors from 392 are easy to dial in.

You can run injectors up to 100%, not the best but it works.
Otherwise you can raise fuel pump voltage/loss

Hello creek-ranch,

It's settled then 392 injectors ftw
But I think I don't have the parameter you mentioned as well.

[f.creek-ranch]

Maybe you can steal it from a 392 file….mostly fits.

Then dial in injectors

[james1595]

Final 6.4 injector data.hpt

here is your tune with stock 392 injector data

also, thats alot of timing, are you getting knock?

[Kandiry]

Maybe you can steal it from a 392 file….mostly fits.

Then dial in injectors

I already have a stock 392 file, but it has a parameter called InjPW Vs FuelMass and I don't. That's why I was having trouble figuring this out.

[Kandiry]

Final 6.4 injector data.hpt

here is your tune with stock 392 injector data

also, thats alot of timing, are you getting knock?

I cannot see any changes made on the file you sent, I think some parameters are showing on your VCM editor that I do not have.

As for the timing, on part throttle condition I've logged knock sensor voltages around (0-0.3 V), WOT around (1.2-2.0 V) on 95 octane. So I'm not sure if I'm logging knock data correctly.

[edcmat-l1]

I already have a stock 392 file, but it has a parameter called InjPW Vs FuelMass and I don't. That's why I was having trouble figuring this out.

It should have that table or at least the inverse. Post both files here or email them to me. Email address in my sig.

[edcmat-l1]

I cannot see any changes made on the file you sent, I think some parameters are showing on your VCM editor that I do not have.

As for the timing, on part throttle condition I've logged knock sensor voltages around (0-0.3 V), WOT around (1.2-2.0 V) on 95 octane. So I'm not sure if I'm logging knock data correctly.

You should be logging knock retard. Logging that and advance will tell you what you need to know.

[james1595]

Thats weird because i made the changes directly to your file. What version of hptuners are you using?

[Kandiry]

It should have that table or at least the inverse. Post both files here or email them to me. Email address in my sig.

I will be attaching my files here. I am logging knock and advance and I did not find anything concerning. tbh I'm not 100% sure if I'm logging the data properly but everything looks fine.
As Found.hpt
Final.hpt

[Kandiry]

Thats weird because i made the changes directly to your file. What version of hptuners are you using?

Currently on 5.0.4
Are you on Beta?

[LilSick]

those tables have been around since before 5.04

[Kandiry]

those tables have been around since before 5.04

You are right, I apologize to everyone for the confusion this is my fault as I forgot to switch the editor parameter view to advanced *facepalm*

[Kandiry]

Final 6.4 injector data.hpt

here is your tune with stock 392 injector data

also, thats alot of timing, are you getting knock?

I got your data now, thank you!

[james1595]

Youre good. It happens