Trouble e40 scaling

[n_brio]

I got My car back from the tuner late summer and it was not running good on idle and when i came to a stop i dies sometime.
He is the only tuner avable here in sweden that is resonable distance so i brougt hp tuner my self and started to read a lot and i have found a lot of mistakes in the tune.

My set up:
2005 m6
forged ls2 10:1
ecs baby blower cam whit supporting mods
ecs paxton sl1500 no restrictor 16 psi
e85
ecs stage 3 fuelsystem return style boost ref
id 1000 injectors
1 7/8 headers without cats
dpe 2.5 bar map sensor
running in 2 bar pure SD (E40)

The tuner did not use the data from dpe for the map sensor
He did nog use the data for the id1000 injectors, He was using the stock injector data and using the max allowed flow rate.

And he has not tund od the maf so i get codes (easy to turn off)
And he has not tund od the rear o2 so i get codes (easy to turn off)

He has not change any thing in the PE table or BE table its from the stock tune.


Now my problme is now when im putting in the right data for the injectors i have to scale it 50% and that is quite near the max value in flowrate.

How do i do whit the rest that needs to be scaled? becaus i dont know what he has been changing to get the car to run. I dont have any base map to start whit....

Does anyone here have a good scaled map to start with for E40 2bar os no maf?

The tune is from the tuner i have not change anything.

[mowton]

I got My car back from the tuner late summer and it was not running good on idle and when i came to a stop i dies sometime.
He is the only tuner avable here in sweden that is resonable distance so i brougt hp tuner my self and started to read a lot and i have found a lot of mistakes in the tune.

My set up:
2005 m6
forged ls2 10:1
ecs baby blower cam whit supporting mods
ecs paxton sl1500 no restrictor 16 psi
e85
ecs stage 3 fuelsystem return style boost ref
id 1000 injectors
1 7/8 headers without cats
dpe 2.5 bar map sensor
running in 2 bar pure SD (E40)

The tuner did not use the data from dpe for the map sensor
He did nog use the data for the id1000 injectors, He was using the stock injector data and using the max allowed flow rate.

And he has not tund od the maf so i get codes (easy to turn off)
And he has not tund od the rear o2 so i get codes (easy to turn off)

He has not change any thing in the PE table or BE table its from the stock tune.


Now my problme is now when im putting in the right data for the injectors i have to scale it 50% and that is quite near the max value in flowrate.

How do i do whit the rest that needs to be scaled? becaus i dont know what he has been changing to get the car to run. I dont have any base map to start whit....

Does anyone here have a good scaled map to start with for E40 2bar os no maf?

The tune is from the tuner i have not change anything.

If you would like some help in scaling, post tune and any logs you have. The bottom line is you need to scale all airflow parameters (grams, g/cyl and torque) as well as tables using airflow as an axis value by scaling the axis values and aligning its previous parameter data with the new reduced axis pointer. This is done for tables like timing, cylinder charge temp etc.

Also, thanks to Greg Banish we know that HPTuners does a strange thing by increasing the VE tables when ever you change the cylinder size (part of scaling procedure) to try and maintain the same charge size. Thw way around this is to copy the VE table before you change the cylinder vol size, make the change, save the file and reopen. The paste back the original VE table and perform the scaling process. Update -- this for GEN III setups only, sorry for the confusion

Attached is a file from a 2005 Vette we did, E40, FIC 2000 injectors, similar blower setup (bigger cam though) and 2.5 Bar COS. You can use it for points of reference in scaling technique, 2.5 Bar MAP settings, PE etc. Car ran great but as I look back at it, the cylinder vol seems stock? Not sure why Update -- again, Gen III info, disregard for Gen IV. Post your tune and we can see what needs to be done on yours.

2005 E40 FIC 2000 SC Corvette scaled 75pct.hpt

Ed M

[n_brio]

The tune is in the first post. only me that can se it?

When i compare it to a stock file the only thing he has change is the Ve table, timing, injector flow rate (max) and lower the stoich to 10.

[mowton]

The tune is in the first post. only me that can se it?

When i compare it to a stock file the only thing he has change is the Ve table, timing, injector flow rate (max) and lower the stoich to 10.

My bad, sometimes I get lost as far as what thread I am in....senior moment :-) Still any logs you have would help as well. Ill look at the file now.

Ed M

[mowton]

Also, the tune I posted is in open loop SD where as yours is in closed loop so I would be interested as to where the fuel trims are in a log.

Also it looks like he has disabled the adaptive idle update (increased rpm error to 800...), not sure why? Could explain bad idle and driveability issues are due to poor fuel/air parameters. Again, the logging is the only way to tell.

Ed M

[n_brio]

Here is a street log that i made before winter but i dont know why my wideband is not in the log so i attach a pic also. Since the log i have changed my stock fuel pump to a walbro 450 (and i have a a1000 on hoboswitch) becaus i think it did not like e85 and that caused the high dc on the injectors.

[mowton]

Unfortunately the data you are presenting is not indicative of the current setup of the car. The log and WB pic you presented are dangerously lean (13.14 AFR with a stoich of 10) and would expect to see massive knock assuming the WB setup is accurate. With E85, as you have updated, you needed a lot more fuel system with the 14 lbs of boost you are running.

Based on what I am seeing, you need to log the current set up (I have attached an updated .cfg file) and insert your WB into the display and the .cfg I supplied.

nbrio .cfg

Hope this helps.

Ed M

[DSteck]

You do not need to change the cylinder size when scaling a Gen IV.

OP, make your life easy. Start from a stock file, upgrade it to the 2 bar OS, and start over. The map sensor data is 250/10. Enter the ID data but cut the injector flow rate in half. Then, double your stoich value. Don't scale anything else. Tune in SD and be on your way.

[mowton]

You do not need to change the cylinder size when scaling a Gen IV.

True Dave, thanks for the clarification...sometimes I don't think of the E40 as GEN IV :-) Update post above...

Ed M

[n_brio]

is the right value 250 10 and 250/3= 83,33 for the map sensor or 244.67 10.21 244.67/3= 81.56 or doest it matter?

Can i half the flowrate and dubbel the stoish on e40? i did read here on hp forum that you could not do this on e40 or does it work i you use only SD and no maf?

[DSteck]

The linear value is 250kPa.
The offset value is 10kPa.

The double stoich method works just fine on E40. You'll need speed density if you're moving more air than the MAF can handle.

[n_brio]

and the linear B do you divide 250 by 3 or 200/3 becaus its a 2 bar system?

[DSteck]

Don't worry about that. It's not used.

[n_brio]

This leads to the next question double the stoich for e85 like 2*10=20 or the stoich for gas like 29-30??

[PST]

Double the stoich for the fuel you are using.

[n_brio]

ok thank you all!

[n_brio]

What should i set the PE an BE to on e85?

PE 1.176 all over
BE 1.3 and lean out to 1.25 after max tq

or what do you think?

[Pulse_GTO]

You do not need to change the cylinder size when scaling a Gen IV.

OP, make your life easy. Start from a stock file, upgrade it to the 2 bar OS, and start over. The map sensor data is 250/10. Enter the ID data but cut the injector flow rate in half. Then, double your stoich value. Don't scale anything else. Tune in SD and be on your way.

Would doubling the stoich value not jumble up the VE histogram in the scanner?

[DSteck]

Would doubling the stoich value not jumble up the VE histogram in the scanner?

No, why would it?

[n_brio]

If i make a log with commanded lambda should i be using the stoich value for alcohol or the double value becaus i have scaled the tune?