The Project Pad

Hi all,

Been searching a lot about this and cannot find the information. I have two spec sheets for the Siemens Deka 630cc injectors, but cannot make out how to use the information. What do I put here as indicated in the picture? Is it correct already?

This is what mine are. They are working well, but might need some tweaks on your car. HTH.


Req_fuel is: 4.6ms.

UrSobsessed wrote:This is what mine are. They are working well, but might need some tweaks on your car. HTH.


Req_fuel is: 4.6ms.

I run req_fuel 5.9 due to E85. How did you get to these numbers? I used the simplified table in VEMS with the numbers sheet from Siemens but the motor ran junk.
I used the attached values for offset, but I guess I needed to multiply by some factor.

I got them from zeet on QW and then tweaked them a bit to my system.

UrSobsessed wrote:I got them from zeet on QW and then tweaked them a bit to my system.

Don't know who zeet is. How much tweaking did you do?

I have kept the settings that were in the ECU since I got it and that seems to work OK.

I didn't mess with them too much. Mostly the voltage cells that the car most commonly operates in. Even then, I didn't move the values more than maybe +/- 100us. It's been a long time since I messed with them. The traditional settings work pretty well, but I found I was able to get better results in fuel and idle tuning with the simplified settings.

You can try this method with deadtime calculation also: http://www.vemssupport.com/forum/index.php/topic,2240.msg24790.html#msg24790

UrSobsessed wrote:I didn't mess with them too much. Mostly the voltage cells that the car most commonly operates in. Even then, I didn't move the values more than maybe +/- 100us. It's been a long time since I messed with them. The traditional settings work pretty well, but I found I was able to get better results in fuel and idle tuning with the simplified settings.

You can try this method with deadtime calculation also: http://www.vemssupport.com/forum/index.php/topic,2240.msg24790.html#msg24790

Good information.

Changed my injector effective rampup to 240us, from 1008us. Big difference. Much better injector response that required a complete retune of the VE table had to go 10-20% up almost everywhere.

anyone have a known working traditional settings for these injectors?

I'm about to get some but cant find any reliable information.

quattrobros wrote:anyone have a known working traditional settings for these injectors?

I'm about to get some but cant find any reliable information.

Nah, just go simplified. I have the settings for that.
See attached.

Yea looks like simplified is the way to go in this case.

Thanks for the settings!