does anyone have the numbers for RDX injector battery offset at 55 PSI?

or a way to calculate it?

i want to get that straightened out before i get it retuned

i red the walkthrough on pgmfi but didnt really undertand it well to try it (dont want to mess anything up)


theres also battery offset tables in neptune but they have different voltages and dont specify the base PSI for rdx injectors.


i tried to input the numbers with matching voltages into ostrich but it made the car run too rich so i switched back


im still a noob at tuning so keep it simple please.

 

Changing your battery offsets will effect the entire tune.
One person's numbers may not exactly be correct.
Some one's battery offsets may not be 100% correct for every vehicle.
Let your tuner handle the setting of the offsets.
If your tuner can't manage this, find another tuner.

 

he already tuned the car but i didnt know anything about it he left stock p72 battery offsets.

he was best in the area by many reviews but he was kinda buzy that day and might have just forgot about it.


the car was tuned with stock fuel pump and 45psi

now im switching to walbro 190hp and putting 55psi base pressure because i just notticed few minutes ago that im maxing out the injectors its at 92% duty cycle with that pressure.


im just starting to understand whats goin on with all those numbers and advanced tables and how they are all related

what else should be changed for hi compression b series motor.

 

The battery offset table is there so that your injectors provide the same amount of fuel in the event that your battery voltage changes. (Headlights, fans etc).

A couple of years ago, battery offsets were not even an option in most rom editing software.

Just because crome says 95% duty cycle doesn't always mean it is exactly 95%.

Assuming your running 91-93 octane:
If your car is only making 184 whp, there is no way your at 95% duty cycle at a static fuel pressure of 45 psi with RDX 410cc injectors.

 

lol can i trust anything in crome? this is probably about 10th time i heard dont trust numbers in crome...

so do i really need the curve beyond 8 volts to 15 volts?

if the voltage goes below or above thats pretty much pull over and find whats wrong with your sht dont drive it..



so the easy way would be to idle the car off the battery until i reach about 9 volts and adjust the offset?

but then the wideband(innovative MTX-L) will allso be offset because the voltage is lower or does the wideband conroller have its own battery offset tables to adjust to voltage spikes?

because if im running at 9 volts then everything else is gonna be offset too

 

You shouldn't need to chart under 8 volts or over 16v etc.

To tune the offsets at a lower voltage, you simply put load on the battery by turning everything on that is going to be used in the vehicle.
If you want to get even more accurate with the lower voltage offsets you can disable the charge system and let the battery drop in voltage etc.

Concerning the wideband being effected. The controller doesn't have offset tables.
To tune the offset table under 11-12 volts you may want to use an external wideband that isn't powered by the vehicle's battery.

 

If you really want to nail it down on the next level. You should look into getting an oscilloscope to measure the changes!

 

lol i know im a bit OCD about small details but im not Oscilloscope compulsive disorder yet.

i just really want to learn what all those little details are and unfortunately ( even you have to admit) that internet is full of garbage articles that dont make any sense
and the ones that are good are kinda hard to find.

ive been finding the V8 and american car articles explaining this but then next article explains it completely different for import 4 cylinder engines so im wasting alot of time reading junk sht and not learning much at all

 

If you honestly want to learn, you need to be driving a management which does what you tell it to, accurately, and spits out data that its completely true to the task on hand.

 

That would be the easy way. You learn a lot less doing it the easy way. haha.


Posted from Honda-tech.com App for Android

 

no, you just learn it the right way the first time. Instead of trying to hack/trick the system to accomplish something. Or getting data that is completely false. I, personally, ran into a particular problem with the management at topic which made me move on to other managements very quickly. Tuning a car, we needed to bring timing down. It refused to stop showing detonation on the plugs (even after we pulled some timing). So we said to hell with it, and pulled and addition 10* of timing. It made no difference. We then pulled timing from the map everywhere which would just about make the engine powerless. Ran the exact same. Now tell me this, is that something you want to run into with a car that is on the verge of meltdown to begin with? not me.

I stopped scratching my head, worrying about what could happen, wondering/hoping it does what im telling it to do and moved to a management which doesnt have these problems. I have never looked back. Sure, i understand its free and it may be "ok" at doing some things. But its not even in the same ballpark as neptune or hondata.

spend the extra money on a management which is user friendly and just flat out works.
In the end, its easier to learn the tuning process and it takes the headache out. When you are beginning, its hard enough to understand what everything means in the software.....trust me i was there once and all my friends who helped me can all vouch for that LOL. Its an unnecessary evil to just tack on more **** to make a simple task difficult.

anyway


/rant

 

Neptune has a table for this injector that IM running in my hatch. When I get home from work, I'll post what I have. This correction may not work the same in crome. Fair warning.

 

With battery offsets you have to be careful about just trusting data and inputting those numbers in "brand x" ecu. They all DRIVE the injectors differently and with various hardware...don't ASSume all of them do it the same and don't ASSume the injector data place is driving those injectors with the same ecu you use

 

I have my table offset that came with the RDX's i bought from Chris, i can post those when i get home, i also have the values i inputted into eCtune and like blake said, he'll post the neptune values.

 

if the ecu was already tuned with stock offset table it wont run right until you retune it with rdx tables.

btw is there a formula to calculate offset for higher pressure or same thing applies just do the voltage drop and adjust to same afr at every voltage?