VEMS with Siemens DEKA 630cc

[Nuno_Cristiano]

Hi,

Actually my 7A turbo running with this injectors, normally what AFR/Lambda you measure in idle? If i ajust to 14.7/ ( 1 ) the idle is not much perfect. Pulse width is constant 1.5ms timing 16ºBTDC too but i notice it. Injector Angle phase is removed ( 720º ).

If i run at 0.92 Lambda is near of perfect.

With yours is the same?

Thanks

[popdemonic]

IIRC you're hitting the min. pulsewidth of this 60lbs Deka(1.5ms).

[popdemonic]

i had no problems on running 60lbs Deka with 5bar FPR but my P/W was way higher than 1,5ms.

[A80Avant]

Try using the injector angle width. I have it around 400 to 450 if I remember correctly. My idle was acceptable at 950rpm on deka before I switched to ev14

[diesel des]

I also have no idle problems on 630cc delka injectors and vems. Just over 2 ms at idle from memory.

Sent from my LG-H955 using Tapatalk

[Nuno_Cristiano]

The problem is that running with 2 ms i have idle very rich, i agree more that minimum pulse width is short to injectors. Actually i run with FPR of ADU engine.

[A80Avant]

I was always able to run 1.00 lambda at 950rpm and could pass mot as well

[popdemonic]

TJ:
Anyone ever run the idle with A/C on as low as 850-870RPM?
If i keep the idle as high as 920-950RPM.i never had erratic or
oscillated idle on 60lbs or 80lbs with 5bar FPR.currently i have
80lbs Deka with 5 bar FPR(Equivalent 1,100cc) the idle Pulsewidth
is 2.2-2.3 ms.i got the erratic idle only if the MAT ramped up 75-85C.
I ordered the 3 and 4bar FPR to give the more Min.pulsewidth at idle.

[A80Avant]

It's known that aftermarket ecu will have some trouble with idle so it makes sense to invest on ev14

[kamuto]

It's known that aftermarket ecu will have some trouble with idle so it makes sense to invest on ev14

if it's mapped properly there should be no problem at all

[ChrisAudi80]

Does anyone have their Deka 630 (traditional) settings in VEMS handy?

Like:
Injector opening time @ 13.2v. I have 496us.
Effective ramp up. I have 1008us which seems quite long.
Voltage compensation. I have 304us, but I read that this could be less.

I know Rampup Voltage compensation is set to 4080us.

[quattro-nick]

my settings in the past with siemens deka 630cc and vems with idle around 1000rpm are

req fuel 3.4 ms
injector open time @13.2v :0s
effective rampup:192 us
rampup voltage compensation:4080 us
voltage compensation:896 us

injector pwm dc: 100%
pwm peak time : 25.5 ms

do not remember exactly how much my fuel pressure was but it was around 3.5 bar
lambda 1.00 on idle

[ChrisAudi80]

my settings in the past with siemens deka 630cc and vems with idle around 1000rpm are

req fuel 3.4 ms
injector open time @13.2v :0s
effective rampup:192 us
rampup voltage compensation:4080 us
voltage compensation:896 us

injector pwm dc: 100%
pwm peak time : 25.5 ms

do not remember exactly how much my fuel pressure was but it was around 3.5 bar
lambda 1.00 on idle

Thank you, I will try those settings later. My req fuel is 5.0 with 2.5bar on my AEB because of e85.

[popdemonic]

When i went from 60lbs to 80lbs Deka.I had badly erratic idle.tweaked up a hundred times but not near perfect.
once i got the correct injector deadtime(latency),You almost do nothing on the idle.it's buttery smooth.Just spending
a little time on running for a various IAT and tweaked up the MAT(IAT) slope compensation.You're all set.No problem at
1.8ms on idle.

[ChrisAudi80]

When i went from 60lbs to 80lbs Deka.I had badly erratic idle.tweaked up a hundred times but not near perfect.
once i got the correct injector deadtime(latency),You almost do nothing on the idle.it's buttery smooth.Just spending
a little time on running for a various IAT and tweaked up the MAT(IAT) slope compensation.You're all set.No problem at
1.8ms on idle.

You mean injector open time @ 13.2v?