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Old 08-21-2015, 08:04 AM   #589
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Originally Posted by JB86'd View Post
Got it, thank you. How exactly does changing those injector ratio tables affect AFR/LTFT? In other words when I datalog this new tune, what changes should I be looking for that weren't due to changing the MAF scaling?
DI fueling is generally more knock resistant than PI fueling, the pi was mainly to stop deposits building up on intake valves and aparantly its better at low rpm .

that lft change probably caused by imbalance between pi and di injector scaling. I have heard of guys setting the di\pi ratio tables to full pi then full di and adjusting the pi scalling so fueling matches better so the transition between pi and di is smoother.

i quoted moto mike in the tune tweaks thread he had a good explaination of pi and di

http://www.ft86club.com/forums/showp...2&postcount=17
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Old 08-21-2015, 08:09 AM   #590
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Originally Posted by Kodename47 View Post
Any reason you chose to run full DI until 7k RPM?
with our crappy fuels it lets you run more timing advance, the guys in southafrica on 95 ron could add 2to 3 degrees timing back in just from running full di till 7200 instead of 5200 in stock tables. on petrol na you not getting near the 6 ms limit moto mike quotes but on e85 you do
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Old 08-21-2015, 04:49 PM   #591
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@Wayno @steve99 @Kodename47

Just did this log, changed only the MAF scale for now, wanted to see what changes that alone would make. Now I see the 3.91 LTFT you were referring to. It's only got probly 10 miles of learning, but how's the AFR look? Slight FLKC but it's 80F out and I was in city driving it hard repeatedly.

http://datazap.me/u/joshbustos86/206...-8-10-11-12-14

Any reason to worry about using full DI up to 7200? extra wear or stress on injectors?
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Old 08-21-2015, 05:46 PM   #592
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@Wayno @steve99 @Kodename47

Just did this log, changed only the MAF scale for now, wanted to see what changes that alone would make. Now I see the 3.91 LTFT you were referring to. It's only got probly 10 miles of learning, but how's the AFR look? Slight FLKC but it's 80F out and I was in city driving it hard repeatedly.

http://datazap.me/u/joshbustos86/206...-8-10-11-12-14

Any reason to worry about using full DI up to 7200? extra wear or stress on injectors?
looks ok to me bit of knock like you said.

wayno tunes smooth the timing he adds base timing b to knock correction max A and then smooths the lumps and bumps, he has found that works better.

anything we change like di\pi ratios may have some other effect we dont know about, oem guys do thousands of hours testing, but they also have other constraints like emmissions.

Anyone on the E85 tunes runs the injectors 30% harder(longer injection time) and they run the full di up to 7200 not 5200 like in petrol tunes. dont know of any issues yet.
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Old 08-24-2015, 06:55 PM   #593
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Originally Posted by Wayno View Post
Yes, it's correct.

Also copy the injector ratio tables. They have re-scaled axis.
Just did a log with the MAF scale change, and the port injection ratio changes you suggested.
LTFT looks pretty spot on..AFR is definitely leaner than before the changes, but its much closer to Commanded AFR now. I have some knock, I'm guessing from the slightly leaner AFR and from it being about 85F out.

I'm going to pull minimal timing in the problem areas and hopefully that will sort it out.

http://datazap.me/u/joshbustos86/206...3-4-8-10-12-14
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Old 08-24-2015, 10:17 PM   #594
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Quote:
Originally Posted by JB86'd View Post
Just did a log with the MAF scale change, and the port injection ratio changes you suggested.
LTFT looks pretty spot on..AFR is definitely leaner than before the changes, but its much closer to Commanded AFR now. I have some knock, I'm guessing from the slightly leaner AFR and from it being about 85F out.

I'm going to pull minimal timing in the problem areas and hopefully that will sort it out.

http://datazap.me/u/joshbustos86/206...3-4-8-10-12-14
@steve99 @Kodename47
Next thing to copy is the load limits which will fix that hole between 2400 and 4000. Don't try to fix it by adjusting the maf scale because you'll end up lean at low load and 3.2V.

You could copy the top half of my base timing if you want, say from 4600 and above. It will end up smoother than if you start filling your timing map with pot holes.

Should look like this.

http://datazap.me/u/wayne/98-v844-3-...&zoom=829-1034
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Old 08-25-2015, 04:03 AM   #595
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Quote:
Originally Posted by Wayno View Post
Next thing to copy is the load limits which will fix that hole between 2400 and 4000. Don't try to fix it by adjusting the maf scale because you'll end up lean at low load and 3.2V.

You could copy the top half of my base timing if you want, say from 4600 and above. It will end up smoother than if you start filling your timing map with pot holes.

Should look like this.

http://datazap.me/u/wayne/98-v844-3-...&zoom=829-1034
How does changing the load limit fix the AFR/fuel trim in those problem areas I have from 2400-4000? I'm trying to figure out the how and why of all these changes to educate myself.
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Old 08-25-2015, 09:23 PM   #596
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Quote:
Originally Posted by JB86'd View Post
How does changing the load limit fix the AFR/fuel trim in those problem areas I have from 2400-4000? I'm trying to figure out the how and why of all these changes to educate myself.
Keep in mind, increasing load means more air going to the engine. The load limits cap the amount the air.

First you should get closed loop scaled really well the traditional way. Load limits only come in during open loop. If an area is running rich, you can lower the load limits until the amount of air gets to the desired mixture in the OL fueling table. Or vice-versa if you're running lean because you're bumping into the limit.
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Old 08-25-2015, 11:44 PM   #597
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Keep in mind, increasing load means more air going to the engine. The load limits cap the amount the air.

First you should get closed loop scaled really well the traditional way. Load limits only come in during open loop. If an area is running rich, you can lower the load limits until the amount of air gets to the desired mixture in the OL fueling table. Or vice-versa if you're running lean because you're bumping into the limit.
Okay thank you sir @phrosty

I think I'm going to load the standard OFT stage 2 tune, and try to do the closed and open loop scale after I put some miles on it. I've been reading up on MAF Scaling, and have downloaded the VGI scaling program.
It's a bit over my head, as I understand how to log and what everything is, but setting all of the limits and settings in the program is confusing to me. I guess I'll keep experimenting.
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Old 08-26-2015, 05:02 AM   #598
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Okay thank you sir @phrosty

I think I'm going to load the standard OFT stage 2 tune, and try to do the closed and open loop scale after I put some miles on it. I've been reading up on MAF Scaling, and have downloaded the VGI scaling program.
It's a bit over my head, as I understand how to log and what everything is, but setting all of the limits and settings in the program is confusing to me. I guess I'll keep experimenting.
in the vgi program jist accept the defaults
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Old 08-27-2015, 01:35 PM   #599
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I have currently been running the Stage 2 EL E85 map on a entirely stock car.


I have some very basic understandings of tuning but am a total novice.


I've been reading all of the information I can, especially all of the links that @steve99 has provided regarding the OFT and while there is a lot of great stuff It is not contiguous and I have a hard time making sense of it all, but I'm having fun and am slowly starting to absorb some of this.


I have a local source of E85 and switched over a couple of days ago. At this point I have about 100 miles of easy to moderate driving on the tune so I'm assuming that the ECU has had time to learn and let trims settle.


Here is a log I just recorded this morning and I'm wondering if some of you more experienced guys would look at it and make sure there is nothing abnormal going on or anything I should be concerned with. The car drives great and has not given me any issues. Just really looking to learn more and would appreciate any comments or advice.


http://datazap.me/u/rustysocket/e856...1-4-7-11-13-14


This log was recorded this morning as I got on the freeway and then cruised with the flow of traffic. I noticed near the end that my IAM dropped a little from 1.00 to 0.96


Thanks for everyones help. Comments appreciated.
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Old 08-27-2015, 07:18 PM   #600
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I have currently been running the Stage 2 EL E85 map on a entirely stock car.


I have some very basic understandings of tuning but am a total novice.


I've been reading all of the information I can, especially all of the links that @steve99 has provided regarding the OFT and while there is a lot of great stuff It is not contiguous and I have a hard time making sense of it all, but I'm having fun and am slowly starting to absorb some of this.


I have a local source of E85 and switched over a couple of days ago. At this point I have about 100 miles of easy to moderate driving on the tune so I'm assuming that the ECU has had time to learn and let trims settle.


Here is a log I just recorded this morning and I'm wondering if some of you more experienced guys would look at it and make sure there is nothing abnormal going on or anything I should be concerned with. The car drives great and has not given me any issues. Just really looking to learn more and would appreciate any comments or advice.


http://datazap.me/u/rustysocket/e856...1-4-7-11-13-14


This log was recorded this morning as I got on the freeway and then cruised with the flow of traffic. I noticed near the end that my IAM dropped a little from 1.00 to 0.96


Thanks for everyones help. Comments appreciated.
It looks fine, the bit of knock is likely due to residual petrol in tank when you switched to E85, stock cars knock way worse than that on 91 octane fuel and see corrections of -3 and iam down arround 0.7

odd bit of knock correction of -1 or less and iam of 0.9x nothing to worry about, it will likey go away with next fill of e85.

ltft less than 10% all looks normal for car on oft e85 tune.
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Old 08-31-2015, 09:19 PM   #601
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Got my OFT in today so went a head and updated, made a few runs. No reason to suspect anything is off but would appreciate you guys taking a look into it.

Running:
JDL UEL
JDL Overpipe
JDL MIDPIPE
PERRIN Catback

OFT Stage 2 uel 93 oct

Did a normal drive and a little spirited.

Here you go:

http://datazap.me/u/jph11/log-1441070030?log=0&data=1

Last edited by jph11; 08-31-2015 at 09:19 PM. Reason: forgot to include map
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Old 08-31-2015, 11:03 PM   #602
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Got my OFT in today so went a head and updated, made a few runs. No reason to suspect anything is off but would appreciate you guys taking a look into it.

Running:
JDL UEL
JDL Overpipe
JDL MIDPIPE
PERRIN Catback

OFT Stage 2 uel 93 oct

Did a normal drive and a little spirited.

Here you go:

http://datazap.me/u/jph11/log-1441070030?log=0&data=1
looks fine
little tiny bit of knock occasionally just dropped your iam to 0.97 from 1,

looks like a hot day 100 plus intake air temps

nothing to get worried about, maybe try different brand of fuel

or if rearly kean maybe alter the intake air temp ingnition retard tables but no real need its very minor.

see links below on logging ect
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