VEMS and Ford light green injectors roughly at idle

[Jamo]

It's only the VE that needs rewriting for your current values if your 12x12 quite simple PM me Gazza if you want to know one of the things you need to do to change

[david]

Hy,

i have since 4weeks an VEMS, got it running to 90%

I drive first the RS2 injectors, but at full boost they run over 100% duty at 1.9bar.
Now i changed to the Ford light green ...588, 440ccm , but the idle is very roughly, not so smooth as with the RS2 ones. At topend they run at 80%, looks o.k. to me.

Is there an other injector option for an smooth idle and better topend performance ?
Or can i change the settings in Vems ?

....the next step is an stroker 2,5l in 1/2 - 1 jear....

Thanks

Thomas

i think those injector's part number ending ...588 are 465cc and not 440cc,that could be the problem.
i've thesame ford light green top injector's.

[GazzaG60]

thanks. i done the ve etc. problem ive found is it needs to be created in the bigger scale SW. otherwise it places things in the wrong registers and causes all sorts of issue.

i got some stuff from peter and from Vas. im lazy. not even seen my car in 2 months. its in the garage.

gonna get this bmw sorted out first then dig her out. i need 2 tyres as i got a puncture in one and put in a curb on the other a while back.

[GazzaG60]

potential that the light green are 44lb. not quite 440cc but pretty close.

it shouldn't make night and day differences unless othert things chage too.

[david]

anything over 440cc normally need's a remap,ain't it

[GazzaG60]

anything over what is mapped already needs a map.

with vems its a change of the injector size known as req_fuel.

[david]

learn something everyday

[A80Avant]

the ford light greens are 440cc.I have been using them since my engine rebuild and its definitelly their potential. That does not mean that they can flow more. On flow testing, mine did actually go up to 467cc @ 3bar. Manufacturer says 440 though

[Rocco]

around 400hp id expect.

id just fit an 044 and some dekka 630cc to avoid going over 80% DC

and then ,may can´t use my new Hybrid k26/27..because my 3B to RS2 specs software are some "agresive" and the hybrid boosting 1,8bar surelly must gives more than 400hp true??

i will confirm that with the wideband gauge....if not i will have to install again the original k24 7200

thanks for answer Gazza ,and sorry for the small off topic Thomas

[th.b.w.]

Hy, req_fuel is set on 2.8 now.

I have told to Peter Nanassy and he say that the VE Table should go better from about 100 - 230, so i have change to this req_fuel setting and the table goes from 106 - 220....
It runns better, but not so smooth as with RS2 injectors...

I wonder why the idle stay sometimes at 1000, othertimes on 1100 and AFR stay from 0,90 to 1,10?

1. I will change the spark plugs.
2. change the ISV
3. check the ign. at idle with strobo.light , it is set to 11°

Im wondering about the setting trigger tooth after TDC is set to 58°, in the mechanic guide it is by 62 ° is this right ?


My hardware:
S2 3b, VEMS 1.1.64, single coils from Marc, GT3071 AR/82, Wagner short IM, Wagner ExM K26 machined,
XXL LLK, light green Injectors with 3bar FPR, ported head, supertech valves oversized, ported valve sits, Bosch 044 fuelpump, and and and


Thomas

[A80Avant]

check the timing with a strobe light. Slight differences are always there, and dont trust a paper. Mine was checked and the correct was 57deg.

if you dont have a diode for the ISV, then you shouldnt be using it. it could be the reason why your idle lamda is all over the place.
Turn the IAC off, set a good ign.timing idle so that the VE is where your lamda asks it (do that with ego OFF) and then turn ego ON again.

if by turning EGO on, it fluctuates around the desired lamda value you have set, then your EGO corrections are wrong.

If it sits nicely on the value, then your IAC control needs tweaking.

keep trying!

[th.b.w.]

Hy,

i run without the ego correction till i have finished the VE table...

Peter say the diode was inside the VEMS on stock..... ?

I run only with ign. idle, when i turn on the ISV idle it turns from about 900 - 1100

Thomas

[A80Avant]

ok, so if you are only using ignition timing for your idle, and it still takes the lamda from 0.90 to 1.10, with ego off, im not sure whats going on. It could be a firmware glitch or one of the settings is on, messing up your lamdas. It shouldnt oscillate with a stable VE value. All i can think of is lamda PID settings, but even that should be already set and it shouldnt matter when EGO is off.

[th.b.w.]

Hy,

so i checked the plugs, 4x looks o.k. , 1x wet...

Checked the injectors, flow test them, and now..

1. 4ml
2. 4ml
3. 5,5ml
4. 0,5ml
5. 6,5ml
...after 10sec. duration....

Test the RS2:

1. 3,2ml
2. 3,4ml
3. 3,4ml
4. 3,4ml
5. 3,4ml

That's o.k.


The fu...ing Ford injectors are so bad, i will throw then away.

What injectors are flowtested with min. tolerance and run nicely with VEMS ?

Thomas

[Jamo]

Hy, req_fuel is set on 2.8 now.

I have told to Peter Nanassy and he say that the VE Table should go better from about 100 - 230, so i have change to this req_fuel setting and the table goes from 106 - 220....
It runns better, but not so smooth as with RS2 injectors...

I wonder why the idle stay sometimes at 1000, othertimes on 1100 and AFR stay from 0,90 to 1,10?

1. I will change the spark plugs.
2. change the ISV
3. check the ign. at idle with strobo.light , it is set to 11°

Im wondering about the setting trigger tooth after TDC is set to 58°, in the mechanic guide it is by 62 ° is this right ?


My hardware:
S2 3b, VEMS 1.1.64, single coils from Marc, GT3071 AR/82, Wagner short IM, Wagner ExM K26 machined,
XXL LLK, light green Injectors with 3bar FPR, ported head, supertech valves oversized, ported valve sits, Bosch 044 fuelpump, and and and


Thomas

Exactly the same issue I had in 1.1.65, the issue is the ISV needs to be enabled. Ignition only idle sucks big time with the high idle the only way to get the revs to drop is to open the ISV a small percentage on the map

Once you've done this idle drops and is a lot better

Also disable ego below 1100 rpm it will make idle a lot better