OFT 93 Octane tune...

[Koa]

Originally Posted by zc06_kisstherain

i used to run shell 93 and i got below IAM 1 so i tried with Sunoco 93 then i got steady 1 all time. since then i updated latest OFT and wanted to try data logging again and i see 0.76 on my IAM. i uploaded v2.063 but need to drive around 30-50 miles before i do datalogging. if i get below 1 again, i am just gonna switch to 91 OTS map instead of 93 to be safe.

Remember that big IAT changes, fuel quality in between pumps even, all have a big effect on the platform's knock system

log IAT, IAM, FLKC, Knock Corr (FBKC), Engine load, MAFV, RPM, time and you can figure out areas of knock and conversely where to pull timing or adjust IAT comp table

[zc06_kisstherain]

Originally Posted by Koa

Remember that big IAT changes, fuel quality in between pumps even, all have a big effect on the platform's knock system

log IAT, IAM, FLKC, Knock Corr (FBKC), Engine load, MAFV, RPM, time and you can figure out areas of knock and conversely where to pull timing or adjust IAT comp table

I need to take a course on tuning. i am a noob

[1Cor10:23]

I have access to 94 with e10 and I prefer the 91 tune - with really spirited driving I can still get the 91 tune to knock.

[GotBRZ1691]

Originally Posted by Koa

Engine isn't happy or unhappy.. the problem with adding booster is inconsistency in both knowing the actual E%, octane number, and the treatment all have variances

People who are informed will advise against boosters due to this reason.. it's not because its too expensive by itself.. it's just an inconsistent treatment and one runs the risk of knock if octane adjustment is too little, or wasting $$ by over-octane adjustment

I'll post up some logs. I normally will have my OFT in multi-gauge mode while driving, with the main gauge being knock, and the other two being my fuel trims. I have had a few times where yes consistency has been iffy but over it has not been a problem. Over, what ive experienced, is this is the way to get the least amount of knock.

I drive 6 hrs almost every Friday, mostly all highway except for a mountain pass, RT 154, which is always empty by the time I get there. I have experimented a lot with all the tunes I have on my OFT. Stock tune has a lot of knock while just highway cruising and I find that E85 also has a fair amount of small knocks. 91 runs nice but the 93 tune with octane booster gets that little extra power, and the car runs great. I don't always run the 93 oct tune but like to every know and then

I do the same process every time I fill the tank and only once have the numbers gone wrong. I have however never produced enough knock to where timing had to be pulled.

I just wish we had 93 here in California. And our 91 sucks. Way to often I'd fill up and see the IAM at .6 or .7 I'd rather over octane by a few than be under octane

[Koa]

Originally Posted by zc06_kisstherain

I need to take a course on tuning. i am a noob

I can help you get a head start, pm me

Originally Posted by GotBRZ1691

I'll post up some logs. I normally will have my OFT in multi-gauge mode while driving, with the main gauge being knock, and the other two being my fuel trims. I have had a few times where yes consistency has been iffy but over it has not been a problem. Over, what ive experienced, is this is the way to get the least amount of knock. .....

I do the same process every time I fill the tank and only once have the numbers gone wrong. I have however never produced enough knock to where timing had to be pulled.

I just wish we had 93 here in California. And our 91 sucks. Way to often I'd fill up and see the IAM at .6 or .7 I'd rather over octane by a few than be under octane

Exactly but without an octane content meter or flex fuel setup you're really shooting in the dark. It doesn't look like it on the surface but people pay a premium for that octane booster- and it's easy to see why: packaged by itself, corporation that makes it allocates fixed costs to the product driving up the price, inconsistent fuel bases will have people overusing to compensate..

My advice will be to properly rescale maf and pull a degree or so of timing from trouble areas.. On this engine with these tunes it's around two areas: 2700-3200rpm+low loads (.9-1.3) and in higher rpm/load buckets

[GotBRZ1691]

Originally Posted by Koa

I can help you get a head start, pm me



My advice will be to properly rescale maf and pull a degree or so of timing from trouble areas.. On this engine with these tunes it's around two areas: 2700-3200rpm+low loads (.9-1.3) and in higher rpm/load buckets

I wasnt the one in a need of a tuning class, someone else stated that. The OP I think. EDIT: sorry didnt see you quoted him too!

And I did rescale the MAF after picking up a drop-in-filter using VGIs tool. Didn't need major rescaling but the command AFR was off by .5 to .7 consistently compared to the actual AFR.

Is there 93 octane in Washington?

[Koa]

Originally Posted by GotBRZ1691

I wasnt the one in a need of a tuning class, someone else stated that. The OP I think. EDIT: sorry didnt see you quoted him too!

And I did rescale the MAF after picking up a drop-in-filter using VGIs tool. Didn't need major rescaling but the command AFR was off by .5 to .7 consistently compared to the actual AFR.

Is there 93 octane in Washington?

you know you can edit without it showing up as "edited" for the first 5 minutes yea?


Command vs actual AFR isn't necessarily due to maf needing to be rescaled.. POL fueling table and other fuel target tables are other areas of improvement to align the two. Remember at the end of the day its all about what your ACTUAL afr is. Fuel trims are designed to be flexible, but the real boil down is what afr the engine is experiencing. Doesn't need to be 1:1 with commanded, although that is recommended for OTS or close to OTS tunes

[GotBRZ1691]

Originally Posted by Koa

you know you can edit without it showing up as "edited" for the first 5 minutes yea?


Command vs actual AFR isn't necessarily due to maf needing to be rescaled.. POL fueling table and other fuel target tables are other areas of improvement to align the two. Remember at the end of the day its all about what your ACTUAL afr is. Fuel trims are designed to be flexible, but the real boil down is what afr the engine is experiencing. Doesn't need to be 1:1 with commanded, although that is recommended for OTS or close to OTS tunes

Using the OFT with a close to OTS tune, and that is what was recommended by many. I'll look into pulling some timing in those trouble areas, and since thats where I normally cruise on the highway and my car is still just my DD, its not like I need the most advance timing in the 2,500 to 3,500 area.

[GotBRZ1691]

Originally Posted by zc06_kisstherain

I need to take a course on tuning. i am a noob

Read, read, and read some more.

This forum has a lot of good threads about the basic and there are a lot fo knowledgeable people available to help you in your research and understanding.

I new nothing until I joined the forum and have learned a lot since purchasing the OFT.

[zc06_kisstherain]

Originally Posted by Koa

I can help you get a head start, pm me

thanks. I drive my car only 1-2 times during weekend since i have 2nd car for work with my wife (working in next town together lol)

I will try to log some data this weekend to send you and lesson begin~!! lol

Thanks

[Koa]

Originally Posted by zc06_kisstherain

thanks. I drive my car only 1-2 times during weekend since i have 2nd car for work with my wife (working in next town together lol)

I will try to log some data this weekend to send you and lesson begin~!! lol

Thanks

Be sure to log the following:

Time
RPM
Throttle %
Engine Load
MAFV
IAM (advance multiplier)
STFT
LTFT
AFR
Command AFR
Knock Corr (FBKC)
FLKC
OL/CL Status
IAT

Do a couple logs, try to be smooth as possible and limit the amount of idling and shifting. Spread 4 or so logs around: 1 low speed, 1 cruising speed, 1 mixed driving (in town kinda driving), 1 WOT run log (4-5-6 third gear 2k-redline WOTs)

I suggest doing all of this on a mountain road or somewhere where there are no cars around, and a slight incline helps

[Koa]

Originally Posted by GotBRZ1691

Using the OFT with a close to OTS tune, and that is what was recommended by many. I'll look into pulling some timing in those trouble areas, and since thats where I normally cruise on the highway and my car is still just my DD, its not like I need the most advance timing in the 2,500 to 3,500 area.

people will recommend whatever they feel is safe.. I'm not too impressed with the ots tunes as far as knock goes, HOWEVER, I don't feel its shiv and crew's fault: these engines have a seemingly advanced and sensitive knock correction system, so I do suggest pulling timing where it knocks. Chances are its tip in or another resonance

[zc06_kisstherain]

Originally Posted by Koa

Be sure to log the following:

Time
RPM
Throttle %
Engine Load
MAFV
IAM (advance multiplier)
STFT
LTFT
AFR
Command AFR
Knock Corr (FBKC)
FLKC
OL/CL Status
IAT

Do a couple logs, try to be smooth as possible and limit the amount of idling and shifting. Spread 4 or so logs around: 1 low speed, 1 cruising speed, 1 mixed driving (in town kinda driving), 1 WOT run log (4-5-6 third gear 2k-redline WOTs)

I suggest doing all of this on a mountain road or somewhere where there are no cars around, and a slight incline helps

I sent PM and sharing logs i had it today just in case members wanted to see.

I had a time to log above files.
1. Low Speed (log 2 times)
http://www.datazap.me/u/zc06kissther...w-speed-cruise
http://www.datazap.me/u/zc06kissther...2?log=0&data=1
2. HighWay
http://www.datazap.me/u/zc06kissther...y?log=0&data=1
3. MIX Driving (city and highway)
http://www.datazap.me/u/zc06kissther...x?log=0&data=1
4. WOT
http://www.datazap.me/u/zc06kissther...r?log=0&data=1

1st pull - 4th gear 2K ~ 6.5K (due to traffic, had to let go of Throttle) 2nd pull - 3rd gear 2K - Redline & shifting to 4th and 5th

[zc06_kisstherain]

@Koa

uhmm any update on my lesson? haha