560cc EVO injectors vs ECUFlash

[TwinTurbo]

Hi guys

just fired up VR4 with 560cc evo injectors and GTR32 Turbos, corrected injector latency vs battary voltage and injector scaling in ECUFlash but still getting 10.0 AFR on 600-700 RPM.

anyone know if Injector Scaling address - 10318 and Injector Latency vs Battary Voltage - 116af is working or no ?

using Kenneth's ROM final version, also used standard ROM downloaded from EVOSCAN.

[foxdie]

just fired up VR4 with 560cc evo injectors and GTR32 Turbos

*drools*

Sorry, what were you saying?

[TwinTurbo]

we have installed 560cc injectors from EVO 8 on VR4, also corrected Injector latency vs battery voltage and injector scaling in ECUFlash according to Marlin's guide, started up the engine, checked AFR and we are still getting 10 AFR on Wideband.

just wonder if injector scaling and Injector latency vs battery voltage addresses in ECUFlash are correct and working

[Nick Mann]

Is it possible that the injectors are so big you can't scale down enough? Can you get the afr's lower if you increase the revs? I can't help with ECU flash, but I know some piggybacks are unable to remove enough fuel when idling with large injectors fitted.

[scientist]

know it sounds weird to ask but, did you wire a resistor pack in? and did you verify the resistance at the plug?

[TwinTurbo]

resistance is not needed, our ECU is enough clever to handle it.



and also, thanks for advices on piggyback, but I need it on standard ecu

[merlin]

Misha, the correct scaling address is

10306

You better set the old value back into 10318, it is an airflow parameter.

[Kenneth]

+1 for 10306

This SHOULD be as it is in the definition included with my ROM.

/edit: Just checked my ROM definition and it is there as 10306 in the 1.03 version.

Misha, the correct scaling address is

10306

You better set the old value back into 10318, it is an airflow parameter.

[TwinTurbo]

Merlin, Kenneth

Thanks alot

what about Injector Latency vs Battery Voltage address 116af? it is correct ?

[scientist]

resistance is not needed, our ECU is enough clever to handle it.



and also, thanks for advices on piggyback, but I need it on standard ecu

Running Evo injectors without a resister pack is not advisable on the VR4 ECU, you will burn it out soon enough

[merlin]

116AF is correct for latency.

Evo injectors do require the balast resistor pack with a stock ECU.
Otherwise probable eventual damage to the driver devices or cooking the circuit board as the current is doubled.
Also, the latencys will be wrong, as the applied voltage is now way different without the resistors.

[thfelipeth]

i wish i could help.. but anyway. when are you posting videos?? this sounds very good

[TwinTurbo]

Merlin

Which type of resistor should be used ? strange is that russians are running without resistors and everything is ok

[scientist]

Some of the russians are running resister packs from what i've seen on their forums. You can get a GTO resister pack and wire it in

[lateshow]

Just changed by scaling from 388-> 361. It seems that stock car has too big value, why??? Every vr4 i've logged seems to have low fuel trim at 4,6875 and quite often oxygen feedback trim has a high positive value. What about your cars?

[Hotwire]

Just changed by scaling from 388-> 361. It seems that stock car has too big value, why??? Every vr4 i've logged seems to have low fuel trim at 4,6875 and quite often oxygen feedback trim has a high positive value. What about your cars?

Yep, FuelTrim_Low has been 4.5+ (4.8072 in my case) on every car i've logged, my 2, 2 other friends etc.
I have no idea why - hopefully kenneth or Merlin can help?

[merlin]

lateshow, check your injector scaling address, stock should be 366.
Your scaling address in your xml might be wrong, however, the "scaling" for the injector size seems to be wrong, you should not be able to get values of 388 and 361.

As for injector resistor packs, in Oz we have the v6 Magna to scam parts like that, and various V6 Hyundai's.
Alternatively, just get the packs from any 4-pot Mitsi and use two packs.

[lateshow]

lateshow, check your injector scaling address, stock should be 366.
Your scaling address in your xml might be wrong, however, the "scaling" for the injector size seems to be wrong, you should not be able to get values of 388 and 361.

As for injector resistor packs, in Oz we have the v6 Magna to scam parts like that, and various V6 Hyundai's.
Alternatively, just get the packs from any 4-pot Mitsi and use two packs.

It's Kenneths rom and he just said it's right. Maybe it's just scaled differently, as I changed it my oxygen feedback trims jumped from +10 to 0 or less than 0.

Actually, who can say which one is right scaling. I just took ~5% off

edit: Checked It's using DSM scaling which gives 388 and EVO scaling gives that 366 you were saying so no problem.

[Hotwire]

Thought this was the best place to post this / ask for advice.

On the weekend I tuned a Legnum with KKR upgraded turbos and Sard 650cc injectors (with numerous supporting mods too).

First of the rank, I adjusted the injector scaling to 621cc/min (DSM) 585 Evo scaling.
Latency values were set to:
4.7V - 6.12
7.0V - 5.616
9.4V - 3.264
11.7V - 2.136
14.1V - 1.344
16.4V - 0.912
18.7V - 0.456

With 20 mins cruising driving, then 16 minutes idling, fuel trims were LOW_4.807 and MID_0.101 - I thought Pefect! However, the idle is lumpy, fluctuation between 600-700rpm, and there is slight hesitation around the CL/OL transition point (70-80 load, 3000rpm) acccording to the driver (i couldnt feel it from the passenger seat). It was hard to measure AFR at idle (as on have tailpipe sensor, not bung in front pipes) but on cruise seemed to be at around low 15s at the tailpipe (seemed normal) and under load, was matching the AFR target map perfectly (initally 10's, then leaned out to 11.5 under full accelleration)

However the lumpy idle persisted. Now the only "spec" I have seen on the net for the Sard 650cc is 1.5ms latency - but no voltage given!?!
I have searched for hours on evolutionM for a similar spec injector and latency, to no avail. Can anyone (looking Merlin's way hopefully) shed any light on how I need to adjust the idle? My inclination is to bump up the latency as I think it *may* be lean at idle, thus rough idle. i.e. take the 14V value to 1.45 or even 1.5ms....

Other than that the car went like a shower of ****, and on 15psi was seeing 220 load pretty consistenly, but not sure of power or torque figures as we were road tuning.

Cheers
Lee

[lateshow]

That low trim is too big -> could be going lean. What does oxygen feedback say, is it big on positive all the time? You should be always aiming to 0 trims at LOW, as I said for some strange reason stock setting gives too little fuelling without lambda.

Reaching 220 loads @ +6000 would mean youre doing over 350 hp.

Latency was an issue when I tried the same with evo V and 870cc injectors... couldn't get it to idle properly cause I had no idea about the latency values, just doubled the original ones. Latency values seems to be kept hush hush for some reason, a big national secret or something?