EcuTek R&D at Precision Dyno
Originally Posted by Widebandphillip
Looking at fuel trims on the scan tool doesn't really depend much on data rate. Battery compensation isn't there to compensate for injector dead time, it's there for something else that i'll let you figure out. interesting that the ecutek has that feature. I've only seen that on standalones. Are you sure you're not confusing it with injector scaling?
The battery compensation is also there with the EcuTek.
There is no confusion
Originally Posted by Widebandphillip
Are you talking about 14.7 flat or was it bouncing around? I wouldn't expect it to be solid anyway since the ecutek can't compensate for injector battery offset , plus injector advance, plus injector dead time which is solved by injector advance. He probably just hooked up a scantool and looked at the fuel trims and got them as close to as 0 as possible. That's all you can do.
Originally Posted by Widebandphillip
And you've never tuned anything before, so why are you even trying?
What is the reason for this comment? Do you feel that you are all knowing and noone else is allowed to venture out into the tuning world.
Just for that I will have to make sure that He knows as much as I can teach him. Maybe on eday we could see what you can do. A little battle maybe.
Stop being an ***.
Last edited by Precision Dyno; Sep 29, 2005 at 05:55 PM.
Originally Posted by EFIxMR
one thing to note about oem computers is that they have a lot of development time into them as well as a lot of money invested to develop their hardware.
it could be that those parameters that are normally crucial for stand alones, such as adjustable battery compensation depending on injector just isn't that important on oem ecus.
for instance, in do honda obd 1 rom tuning and i frequently run 1000 cc injectors on many setups. there is no parameter in the software to adjust for injector dead time. yet the stock honda ecu with the right software (neptune) can maintain a 14.7 a/f ratio at a 900 rpm idle, exhibiting perfect throttle response, and drivability that rivals my motec box. we have run up to 1600cc injectors on the stock honda ecu without problems.
its kinda disappointing to hear that the Ecutek has trouble with injectors that are just 100cc give or take larger than stock. its actually hard for me to believe.
i have the techtom reflashing gear... and from as far as i can remember off the top of my head there isnt an address for specifically rescaling the fuel map for larger injectors, or any address for battery offset compensation.
i suspect that in order to compensate for larger injectors, all reflash programs do is apply a proportional decrease across the board on the hexidecimal fuel values.
i guess i got to try it for myself... but i just have one too many things going on right now.
it could be that those parameters that are normally crucial for stand alones, such as adjustable battery compensation depending on injector just isn't that important on oem ecus.
for instance, in do honda obd 1 rom tuning and i frequently run 1000 cc injectors on many setups. there is no parameter in the software to adjust for injector dead time. yet the stock honda ecu with the right software (neptune) can maintain a 14.7 a/f ratio at a 900 rpm idle, exhibiting perfect throttle response, and drivability that rivals my motec box. we have run up to 1600cc injectors on the stock honda ecu without problems.
its kinda disappointing to hear that the Ecutek has trouble with injectors that are just 100cc give or take larger than stock. its actually hard for me to believe.
i have the techtom reflashing gear... and from as far as i can remember off the top of my head there isnt an address for specifically rescaling the fuel map for larger injectors, or any address for battery offset compensation.
i suspect that in order to compensate for larger injectors, all reflash programs do is apply a proportional decrease across the board on the hexidecimal fuel values.
i guess i got to try it for myself... but i just have one too many things going on right now.
Idle is rock steady and tip in fantastic. Very easy to use and some nice detailed 3d mapping to look over while modifying roms.
The Ecutek is what I am considering and have been waiting for. In any event, CAN IT HANDLE LARGER INJECTORS w/o a problem? The mods I want require at least going to a 660cc injector at some future point
Yes probably handles larger injectors better then most other tuning products. As long as you are on the stock turbo though I would definitely stick with the stock injectors and just install a pump.
Originally Posted by Widebandphillip
Care to prove the rock steady idle and afr? Just a simple test. Unplug the alternator and videotape the wideband.
The dead time is fine along with the battery compensation. A simple calculation is all that is needed to make it run perfect.
We found that out just fine.
Stop being a sceptic.
Don't you drive a subaru?
Last edited by Precision Dyno; Sep 29, 2005 at 05:54 PM.
Originally Posted by althemean
The Ecutek is what I am considering and have been waiting for. In any event, CAN IT HANDLE LARGER INJECTORS w/o a problem? The mods I want require at least going to a 660cc injector at some future point
Also they have had about 600 BHP to the wheels with the stock MAF and those injectors. That is plenty for the street IMHO.
I have tuned personally up to 750cc without an issue.
You will be very happy with your decision to go with Ecutek.
Just got done tuning a evo that had a set of 880cc injectors with 272 cams and all the bolt on goodies. Car idles nice and smooth, and builds about 14psi of boost on the launch control. This was all done with the stock ecu and the Ecutek reflash software.
Originally Posted by Precision Dyno
Do you drive around with an unplugged alternator??
The dead time is fine along with the battery compensation. A simple calculation is all that is needed to make it run perfect.
We found that out just fine.
Stop being a sceptic.
Don't you drive a subaru?
The dead time is fine along with the battery compensation. A simple calculation is all that is needed to make it run perfect.
We found that out just fine.
Stop being a sceptic.
Don't you drive a subaru?
Originally Posted by EFIxMR
not that i want to get in the middle of a bickerfest, but unplugging the alternator is pretty much standard practice for people whom tune stand alone ecus to verify that the battery compensation is set correctly.
If at any time the vehicle runs under 12 volts to the injectors the car should not be driven.
The only compensation that will matter will be at running voltage. That is my standard.
