OmniPower 4 bar settings
Jun 1, 2009, 06:40 PM
#17
One other thing I noticed is today when I actually messed with scaling the MAP sensor to keep the KPA to load ratio correct it didnt want to play ball.
I DO NOT SUGGEST altering it from a 1:1 ratio at this point.
It will affect "scaled" injectors and how they want to operate. I am just now starting on a stock frame turbo car that has already made 431whp on a stocker. I have noticed that it does exactly what you are describing, idle and cruise are good and then WOT is lean. I do not currently have settings for that. I can offer the following though for some other turbos:
61mm Precision w/ 3" intake (1000cc PTE scaled to 812, JDM 3bar)
500- 90
1000- 93
1250- 97
all others at 100
Baro scaling 1:1
3582HTA w/ 4" intake (RC 1000s scaled to 713)
500- 86
1000- 89
1250- 93
4500- 96
5000-110
all others at 100
This is with a flat Fuel map or at least about what a stock map with fuel pump would look like. There are ALOT of variables though that become apparent when you start looking at the VE of the motor. On the 3582 car 7% was about 1 full AFR point independent of fuel map changes. As you can also see the 4 bar directly affects the numbers we are used to seeing for scaling even though they are really about the same. Nothing can be trusted, we have to learn it over again.
I DO NOT SUGGEST altering it from a 1:1 ratio at this point.
It will affect "scaled" injectors and how they want to operate. I am just now starting on a stock frame turbo car that has already made 431whp on a stocker. I have noticed that it does exactly what you are describing, idle and cruise are good and then WOT is lean. I do not currently have settings for that. I can offer the following though for some other turbos:
61mm Precision w/ 3" intake (1000cc PTE scaled to 812, JDM 3bar)
500- 90
1000- 93
1250- 97
all others at 100
Baro scaling 1:1
3582HTA w/ 4" intake (RC 1000s scaled to 713)
500- 86
1000- 89
1250- 93
4500- 96
5000-110
all others at 100
This is with a flat Fuel map or at least about what a stock map with fuel pump would look like. There are ALOT of variables though that become apparent when you start looking at the VE of the motor. On the 3582 car 7% was about 1 full AFR point independent of fuel map changes. As you can also see the 4 bar directly affects the numbers we are used to seeing for scaling even though they are really about the same. Nothing can be trusted, we have to learn it over again.
Jun 1, 2009, 11:53 PM
#18
One other thing I noticed is today when I actually messed with scaling the MAP sensor to keep the KPA to load ratio correct it didnt want to play ball.
I DO NOT SUGGEST altering it from a 1:1 ratio at this point.
It will affect "scaled" injectors and how they want to operate. I am just now starting on a stock frame turbo car that has already made 431whp on a stocker. I have noticed that it does exactly what you are describing, idle and cruise are good and then WOT is lean. I do not currently have settings for that. I can offer the following though for some other turbos.........
I DO NOT SUGGEST altering it from a 1:1 ratio at this point.
It will affect "scaled" injectors and how they want to operate. I am just now starting on a stock frame turbo car that has already made 431whp on a stocker. I have noticed that it does exactly what you are describing, idle and cruise are good and then WOT is lean. I do not currently have settings for that. I can offer the following though for some other turbos.........
Jun 2, 2009, 09:19 AM
#19
Bigger turbos so far have been easier actually. The 3 35Rs I have done (a 61mm, my 86HTA, and a customer 82HTA) have all been really straightforward. I think the issue is that the stock turbo spools so fast its all over the board. For the stock turbo guys I strongly suggest tuning at low boost (wastegate) so you can get the cruise and low boost dialed then moving on.
Oh and the 4 bar reads to 39.91psi accurately in real world conditions, tested it last night.
Oh and the 4 bar reads to 39.91psi accurately in real world conditions, tested it last night.
Jun 2, 2009, 09:24 AM
#20
Bigger turbos so far have been easier actually. The 3 35Rs I have done (a 61mm, my 86HTA, and a customer 82HTA) have all been really straightforward. I think the issue is that the stock turbo spools so fast its all over the board. For the stock turbo guys I strongly suggest tuning at low boost (wastegate) so you can get the cruise and low boost dialed then moving on.
Oh and the 4 bar reads to 39.91psi accurately in real world conditions, tested it last night.
Oh and the 4 bar reads to 39.91psi accurately in real world conditions, tested it last night.
It looks pretty funky but it doesn't present me with any weirdness now. No rich dips at low loads and no lean spots no matter where i mash on the throttle. I could post a screen shot if you guys want.
Jun 2, 2009, 01:49 PM
#23
Account Disabled
iTrader: (1)
Join Date: Mar 2009
Location: on your roof
Posts: 98
Likes: 0
Received 0 Likes
on
0 Posts
Ok I got mine running pretty decent, I havnt had time to do any WOT or anything yet since I have only driven around my neighborhood. John can you post your map sensor VE calibration table for reference?
Jun 2, 2009, 06:43 PM
#25
Can someone explain to me how the ecu knows what voltage to apply to what amount of boost on a 94170015 rom if there is no way to linearly scale it. I know on a honda using hondata or crome you select a 5 bar mapsensor then it changes the linear voltage. Is this not the case for the evo 8 ecu as i do not see where the map sensor is scaled in ecu flash.
Jun 2, 2009, 06:47 PM
#26
Can someone explain to me how the ecu knows what voltage to apply to what amount of boost on a 94170015 rom if there is no way to linearly scale it. I know on a honda using hondata or crome you select a 5 bar mapsensor then it changes the linear voltage. Is this not the case for the evo 8 ecu as i do not see where the map sensor is scaled in ecu flash.
What bank's speed density seems to use a straight 5 volts mapping to 16bits. Then what he did was make a table to map how many bits equal the load.
So if you change sensors you change scaling and reset the settings in the map ve table so they reflect the values. Hope that makes sense.
Edit:
Here's the scaling used with a 5 bar kalvico sensor.
<scaling name="MAP VE load" units="Load (%)" toexpr="x*(5/32*0.596)" frexpr="x/(5/32*0.596)" format="%.1f" min="0" max="600" inc="0.093125" storagetype="uint16" endian="big" />
Last edited by RoadSpike; Jun 2, 2009 at 06:56 PM.
Jun 2, 2009, 08:12 PM
#27
I noticed one thing about changing the Baro VE scaling today. I took our tech Jake's stock turbo car out today and tuned it exactly where it had been before (431whp on e98 with 1000s) and the duty cycle was 166%. It had been 97-100% before according to EvoScan. The HZ values in the table were WAY off, it showed 3100+hz and 355 load. I'll have to look for the old logs (or swap the other ECU and stock airmeter back in) for comparison but I attached the log for those that want to see it.
Jun 2, 2009, 11:31 PM
#28
Just dawned on me that the .zip didnt attach for some reason.
quick explanation-
6-01 log shows the real boost level, that is not 4 bar error.
6-02 logs show the IDCs doing weird things in relation to the VE not being 1:1 like I had previously mentioned. 6-01 is not 1:1 but is a different ratio than the logs I did today. Not going to talk about the secrets on how that stock turbo does what it does in those log either...least in this thread.
quick explanation-
6-01 log shows the real boost level, that is not 4 bar error.
6-02 logs show the IDCs doing weird things in relation to the VE not being 1:1 like I had previously mentioned. 6-01 is not 1:1 but is a different ratio than the logs I did today. Not going to talk about the secrets on how that stock turbo does what it does in those log either...least in this thread.
