Data Logs! Post them here.

[Rezi]

Hello,

below are the requested logs.

FLKC & commanded afr also logged.

3rd gear WOT 2200-7300
http://datazap.me/u/rezi/stage1-91oc....19&tmax=97.28

After that, cruising on highway mixed with higher load/throttle/rpm then previous
http://datazap.me/u/rezi/stage1-91oc...ata=1-12-13-14

What do you guys think?
This was done after 110km of "Fuel Trim Learning".

Stage 1 (91oct) A00G w. 98,1ROZ Fuel
Oil&Coolant: 93/89°C
Temperature: 10°C~ (sunny)

[JB86'd]

Originally Posted by Rezi

Hello,

below are the requested logs.

FLKC & commanded afr also logged.

3rd gear WOT 2200-7300
http://datazap.me/u/rezi/stage1-91oc....19&tmax=97.28

After that, cruising on highway mixed with higher load/throttle/rpm then previous
http://datazap.me/u/rezi/stage1-91oc...ata=1-12-13-14

What do you guys think?
This was done after 110km of "Fuel Trim Learning".

Stage 1 (91oct) A00G w. 98,1ROZ Fuel
Oil&Coolant: 93/89°C
Temperature: 10°C~ (sunny)

Good job on the logging. You do have some significant knock, but the IAM is staying at 1 so far, so that's good. Are you using the best fuel available to you?

[Rezi]

Hey JB86'd

It is called BP Ultimate Super (98,1ROZ) it is the best bang for the buck.
Shell V Power is also available, i think it is 100ROZ.

E10/E85 not available.

The 3rd gear WOT log was the first time high load/high rpm pull since flash.
So maybe it needs a little bit more to learn?

Yeah, IAM is always on 1. I'm keeping an eye on it everytime.

Do i have to worry about it? Because in summer it gets pretty much hot here, about 30-40°C.

The only modification i have is the HKS Intake Duct/HKS Drop-In Filter & Axle-Back. Maybe the Filter is a little bit dirty. Installed it 6000km ago.

[JB86'd]

Originally Posted by Rezi

Hey JB86'd

It is called BP Ultimate Super (98,1ROZ) it is the best bang for the buck.
Shell V Power is also available, i think it is 100ROZ.

E10/E85 not available.

The 3rd gear WOT log was the first time high load/high rpm pull since flash.
So maybe it needs a little bit more to learn?

Yeah, IAM is always on 1. I'm keeping an eye on it everytime.

Do i have to worry about it? Because in summer it gets pretty much hot here, about 30-40°C.

The only modification i have is the HKS Intake Duct/HKS Drop-In Filter & Axle-Back. Maybe the Filter is a little bit dirty. Installed it 6000km ago.

It's nothing to really worry about. I'm pretty sure the car has learned it's fuel trims. You may have more knock on a hotter day, or when you're pushing it harder. If I were you, I'd run the best fuel possible if it isn't outrageously priced. You'll see more power, safer tune, and possibly better mpg.

[Rezi]

Originally Posted by JB86'd

It's nothing to really worry about. I'm pretty sure the car has learned it's fuel trims. You may have more knock on a hotter day, or when you're pushing it harder. If I were you, I'd run the best fuel possible if it isn't outrageously priced. You'll see more power, safer tune, and possibly better mpg.

Thanks JB86'd!

Yeah, i will put Shell V Power for sure (the only one above 98ROZ here) at summer-temperatures. (Fuel price generally dropped)
Also gonna look at the Drop-in filter some day and clean it if necessary.

I usually do not WOT it all the time. Never race it on the track.

It pulls really good in every gear trough the entire rev band.
Fuel Economy also improved already.

Hard to believe how the car will pull with an UEL on Stage 2? I'm already statisfied with Stg1

Thank you so much!

[Rezi]

To understand it right.

If the IAM is always at 1.
And if there is only knock on heavy engine load (Knock Correction was at -028,/ FLKC -1,95 max) there is nothing to really worry about?
Which is worse? KC or FLKC?

I did not log the stock-rom (my fault) in term of knock, but overall you guys are saying that there is definitely "more" knock compared to the OFT Stg1 Tune (91oct).

So with less knock then stock, can we say the OFT Tune is "safer" ?
With shifting trough gears normally at high rpm there was no KC/FLKC to see.
(Compared to 3rd gear 2200-7600 WOT, which i never will use. Downshift and i am good to go)

Now i am waiting till my fuel tank is near empty, so i can log again with 100ROZ.

[JB86'd]

@Rezi That is correct.

[Rezi]

Another log from today.
Nothing special. Zero knock etc.

But what about these fuel trims?
LTFT is more in the negative, STFT more in the positive. Normal?

http://datazap.me/u/rezi/stage-1-91o...0?log=0&data=1

[wangspray]

Hey everyone, I was wondering if you guys could take a quick look at a datalog?

Quick background, I was previously running the st2 uel 91oct tune. It was very knock prone though with the gas in my area, with my IAM fluctuating between 0.3-0.9 despite using higher quality gas in my area (high volume gas stations/chevron/shell). Decided to try E85 to see if I could get some more consistent performance.

I made a quick log today after recently flashing the st2 UEL e85 tune. Been trying to keep it in close loop to learn fuel trims. It's been ~50-60 miles since I've flashed while going easy on the throttle. My LTFT was +/-8 or so on the 91oct tune, but since flashing it's been climbing >10%. Engine knock seems to be pretty minimal during a light throttle run through 2-4. IAM has not dropped below 1 so far, which is far better than I experienced with my st2 91 oct tune. Any ideas? I was thinking a possible exhaust leak, but just wanted to rule out any other issues first. Thanks for any input!

http://www.datazap.me/u/wangjosh/log...0&data=1-11-12

[DocWalt]

Originally Posted by Rezi

Another log from today.
Nothing special. Zero knock etc.

But what about these fuel trims?
LTFT is more in the negative, STFT more in the positive. Normal?

http://datazap.me/u/rezi/stage-1-91o...0?log=0&data=1

Looks pretty normal. If you wanted to center the LTFT #s around 0 you could rescale the MAF, but it doesn't really look to be necessary.

Originally Posted by wangspray

Hey everyone, I was wondering if you guys could take a quick look at a datalog?

Quick background, I was previously running the st2 uel 91oct tune. It was very knock prone though with the gas in my area, with my IAM fluctuating between 0.3-0.9 despite using higher quality gas in my area (high volume gas stations/chevron/shell). Decided to try E85 to see if I could get some more consistent performance.

I made a quick log today after recently flashing the st2 UEL e85 tune. Been trying to keep it in close loop to learn fuel trims. It's been ~50-60 miles since I've flashed while going easy on the throttle. My LTFT was +/-8 or so on the 91oct tune, but since flashing it's been climbing >10%. Engine knock seems to be pretty minimal during a light throttle run through 2-4. IAM has not dropped below 1 so far, which is far better than I experienced with my st2 91 oct tune. Any ideas? I was thinking a possible exhaust leak, but just wanted to rule out any other issues first. Thanks for any input!

http://www.datazap.me/u/wangjosh/log...0&data=1-11-12

I'd check carefully for an exhaust leak if you had that many issues on the 91 tune. Also, it's a little suspicious that the LTFTs are so high at idle on the E85 tune.

[Rezi]

Originally Posted by DocWalt

Looks pretty normal. If you wanted to center the LTFT #s around 0 you could rescale the MAF, but it doesn't really look to be necessary.

Thanks DocWalt!

Could i ask what the benefits are for centering it?
More "power" ?

[solidONE]

Originally Posted by wangspray

Hey everyone, I was wondering if you guys could take a quick look at a datalog?

Quick background, I was previously running the st2 uel 91oct tune. It was very knock prone though with the gas in my area, with my IAM fluctuating between 0.3-0.9 despite using higher quality gas in my area (high volume gas stations/chevron/shell). Decided to try E85 to see if I could get some more consistent performance.

I made a quick log today after recently flashing the st2 UEL e85 tune. Been trying to keep it in close loop to learn fuel trims. It's been ~50-60 miles since I've flashed while going easy on the throttle. My LTFT was +/-8 or so on the 91oct tune, but since flashing it's been climbing >10%. Engine knock seems to be pretty minimal during a light throttle run through 2-4. IAM has not dropped below 1 so far, which is far better than I experienced with my st2 91 oct tune. Any ideas? I was thinking a possible exhaust leak, but just wanted to rule out any other issues first. Thanks for any input!

http://www.datazap.me/u/wangjosh/log...0&data=1-11-12

Run out this tank and refuel with E85 again. I'm sure the amount of residual petrol as something to say about the fuel trims.

edit: second thought, I think the fuel trims are going the wrong direction for excess petrol.

THis is what happened when I dialed my MAF scale to the first tank of E85: http://www.ft86club.com/forums/showp...&postcount=718

[DocWalt]

Originally Posted by Rezi

Thanks DocWalt!

Could i ask what the benefits are for centering it?
More "power" ?

Centering it on your normal fuel pretty much just means that there's more correction available in either direction. As yours looks fairly close I wouldn't worry about it.

I rescaled my MAF, but it was close to -10% LTFT everywhere in my logs. Yours seems to peak around -5% LTFT so I wouldn't bother.

[Rezi]

Originally Posted by DocWalt

Centering it on your normal fuel pretty much just means that there's more correction available in either direction. As yours looks fairly close I wouldn't worry about it.

I rescaled my MAF, but it was close to -10% LTFT everywhere in my logs. Yours seems to peak around -5% LTFT so I wouldn't bother.

Thanks again, DocWalt.

I better leave it as it is now.
Just another small question about those fuel trims.
Negative (-) LTFT means it is pulling fuel so it runs a little leaner?
Positive (+) LTFT means it is adding fuel so it runs a little richer?

Also what i understand. If it shows abnormal high positive (< +10%) LTFT there is probably an exhaust leak.
But if it shows abnormal high negative (< -10%) ..... ?

Searched the forum, but couldn't find anything related to this.
Only if it is within +/- 5% it is considered "good/normal".