OFT question for GTA member

[illmatic_frs]

Originally Posted by VTEC

What was your IAM on esso 93?

I use Ultra 94 too. Never tried the Esso 93

I didn't even bother logging! Butt dyno said it all.

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[Cole]

Originally Posted by wparsons

Have you logged what the knock is like on Costco 91? I'd be interested to see how good it is. My gut says it would be junk, but I have no actual data to back that up with, just me being paranoid

I haven't logged on Costco, only on Esso 91(which is a-ok). I don't often run Costco gas, only because my membership ran out. Since I keep the car at my parents place while I'm on the road for work, my dad sometimes drives the car and always fills it up with Costco gas.

I did ask him to talk with the attendants at the gas bar, and they said that they get their gas from various sources. Being somewhat in the industry, I'm willing to bet they just send their trucks to whatever tank farms are around and buy in bulk from them. So, the options are Shell, Esso and... Can't recall who else has ethanol free gas.

I'll see if he'll drive my car a bunch before the next time I'm home, and get at least 40L in the tank. That way I can do a log and see what's up.

For what it's worth, my car has had a 91 tune for about 90% of the time I've had my OFT and I haven't had any issues with knock.

[Cole]

Originally Posted by illmatic_frs

I didn't even bother logging! Butt dyno said it all.

Sent from my HTC One M9 using Tapatalk

So you could still have a shit ton of knock. But I guess as long as your butt dyno says your car is "better", that's all that matters, right?

[illmatic_frs]

Ummm.. thanks for the advice? We are here to help each other, right?

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[randomthoughts]

Originally Posted by wparsons

Where was the knock happening? I get knock on 91 octane regardless of tune (even stock) if I'm stuck it traffic or even sometimes putting around town. 93 or 94 solves the issue, also regardless of tune. Like someone above mentioned, the OTS 91 and 93 octane tunes are identical at lower rpms (< ~4500 rpm).

I don't recall exactly what rpm the knock was happening at, however it was much better using ultra 94. I switched to uel stage 2 in short order so didn't do too much logging with stage 1. I posted a few logs in another thread.

[1Cor10:23]

I run 91 tune on Ultra94 gas.

[wparsons]

Originally Posted by Cole

For what it's worth, my car has had a 91 tune for about 90% of the time I've had my OFT and I haven't had any issues with knock.

Try rush hour traffic with the AC on, pretty much a guarantee to get knock low down in the RPM range on 91 octane regardless of tune (unless it's been modified to be more conservative).

[drewbot]

Originally Posted by wparsons

Have you logged what the knock is like on Costco 91? I'd be interested to see how good it is. My gut says it would be junk, but I have no actual data to back that up with, just me being paranoid

I used to run Costco 91 until the lines got too long.

It gave me the same results as Shell V-Power 91 - no crickets, IAM fluctuations, slight knock at low-mid RPMs.

[Cole]

Originally Posted by wparsons

Try rush hour traffic with the AC on, pretty much a guarantee to get knock low down in the RPM range on 91 octane regardless of tune (unless it's been modified to be more conservative).

The beauty of my car now only being a one weekend per month toy for me . Hell, even when pops drives it, it's an 18 minute back road blast for him, and he bitches more about speed bumps than traffic haha

[sIowbrz]

can someone take a look at the log for me? im using stage 1 91oct tune with esso 93oct
http://www.datazap.me/u/carewyip/log...1-12-14&solo=2

[drewbot]

Originally Posted by sIowbrz

can someone take a look at the log for me? im using stage 1 91oct tune with esso 93oct
http://www.datazap.me/u/carewyip/log...1-12-14&solo=2

Well off the bat your adv multiplier isn't 1.0. Strange

[wparsons]

Originally Posted by drewbot

It gave me the same results as Shell V-Power 91 - no crickets, IAM fluctuations, slight knock at low-mid RPMs.

That's basically what I found on any brand of 91 on both a 91 tune and the stock ROM.

[Cole]

Originally Posted by drewbot

Well off the bat your adv multiplier isn't 1.0. Strange

I feel like I had the same problem with my 2015 many moons ago. Something about logging a couple different parameters maybe? I think @steve99 can answer that one.

[steve99]

Originally Posted by Cole

I feel like I had the same problem with my 2015 many moons ago. Something about logging a couple different parameters maybe? I think @steve99 can answer that one.

Yes something goes weird in log in a couple of spots maybe loose connection to obd port or something.

yes iam is less than 1 in that guys log due knock hes got the usual knock at low rpm plus some pretty serious knock arround 6000 rpm that needs work. It looks like crappy fuel if that the best arround id suggest he mod his tune, might be due to residual 91 in tank