Turbo LS2 boost VE/spark

[rextheracer]

Hey guys,

I just wanted to see what any of you would recommend anything to help me solve a problem ive been having. Basically the car falls on its face in boost. Ive got the Primary VE table nailed, but as soon as the car hits boost it stops pulling and gets really choppy. I just feel like theres something im missing that would fix the problem totally. Can anyone tell me whats going on?

Stock ls2
walbro 255
siemens 60#
holset hx55
93 octane

[DSteck]

I can't see your tune right now, but are you using he enhanced operating system? Do you have a 2 or 2.5 bar map sensor?

[vette_c6]

he is on 2bar OS
and his Offsets for 2 bar

1st thing i spotted ,, his VE TABLE ,, his LAST cullom in VE doesnt match his 1st collom in Ve boost

secondly by comparing his VE table with STOCK GTO 2006 M6
his VE table is Less then STOCK Ve table

thirdly ,running in OPEN lope and disabling the LTFT
4th .. raping the PE ,, and its kind of in the middle of 12.0 to 12.01
his boost power enrich is 11.5

he having touched the Trq manegment

hope you can comment now Dsteck :d

and if i placed an order for ID or Mapsensors ,, how long does it take to get them ready for ship ?

[rextheracer]

I can't see your tune right now, but are you using he enhanced operating system? Do you have a 2 or 2.5 bar map sensor?

im using the 2 bar operating system. Im using the beta as well.

[rextheracer]

he is on 2bar OS
and his Offsets for 2 bar

1st thing i spotted ,, his VE TABLE ,, his LAST cullom in VE doesnt match his 1st collom in Ve boost

secondly by comparing his VE table with STOCK GTO 2006 M6
his VE table is Less then STOCK Ve table

thirdly ,running in OPEN lope and disabling the LTFT
4th .. raping the PE ,, and its kind of in the middle of 12.0 to 12.01
his boost power enrich is 11.5

he having touched the Trq manegment

hope you can comment now Dsteck :d

and if i placed an order for ID or Mapsensors ,, how long does it take to get them ready for ship ?

Thanks for the quick summery....haha

[DSteck]

vette_c6: PM me.

rextheracer: Do you have an actual 2 bar map sensor?

[rextheracer]

vette_c6: PM me.

rextheracer: Do you have an actual 2 bar map sensor?

Yes I do

[rextheracer]

Ive been thinking about re-doing the boost VE table with no PE or BE...i think thats where most of the problems are coming from. So, square one would be:
-taking the 105 column in primary VE
-copying it to the 105 column and the last column in boost VE
-multiplying the last column by 25%
-disable BE and PE
-and go from there?

[rextheracer]

bump

[DSteck]

I would heavily advise against that.

If I get home at a reasonable hour tonight, I will review your stuff and try to help you.

[rextheracer]

bump

[Nodnarb]

What's your base fuel pressure?

Set your Dynamic Airflow High RPM Disable up above your rev limit if you're running in Speed Density.

[rextheracer]

Well i dont know the exact number for fuel pressure, but ive got a walbro 255 in the tank and siemens 60lb injectors...that all thats done to the fuel system

I jacked up the dynamic airflow disable to 7000, car runs a little better but it still stops pulling... (it is a sd tune)

I found a small leak in my bov, but i dont think that it is the cause of the problem im having...

do you guys think the spark table and injector data looks normal?

[Nodnarb]

do you guys think the injector data looks normal?

No. If you're not using a vacuum referenced regulator you're IFR shouldn't be the same number across the board.


And you're data is all wrong.

[rextheracer]

No. If you're not using a vacuum referenced regulator you're IFR shouldn't be the same number across the board.


And you're data is all wrong.

Ok that makes sense, but how is the data all wrong?

[Nodnarb]

For one thing, those 60 lb injectors flow more like 70 lb/min at the factory fuel pressure of 4 bar.

[rextheracer]

I realize that, but since theres a limiting factor of 63.5 or something like that in the flow rate I cant put in the real values...I personally think that changing the stoich value is going to open up a door full of other problems....

[Nodnarb]

You'll find this quite useful.

http://www.injectordynamics.com/SteckScale.pdf

[rextheracer]

Quick question....in the injector settings should I be using the map offset as opposed to the vac offset?