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Old 06-29-2014, 02:19 AM   #1
njshred
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Default accessport trouble

So i just got an AP for my 2013 STI. It is completely stock so i used the stock map. I use 94 octane but put on the 91 map cause thats what i heard was best. I was looking through the data and in my knock sum cylinder 1,2,3 i had around 30 counts, cyl 4 i had 100 counts. Thats obviously not good, i dont understand what the issue is cause i dont have any mods. Any suggestions would be appreciated. Thanks
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Old 06-29-2014, 06:46 AM   #2
alcoolaid
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Using 91acn?
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Old 06-29-2014, 02:12 PM   #3
njshred
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No just 91, i will try 93 map but it didnt seem any better. Its actually pretty disapointing, the stock map seemed more responsive.
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Old 06-29-2014, 04:43 PM   #4
DIGGYGV8
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Quote:
Originally Posted by njshred View Post
No just 91, i will try 93 map but it didnt seem any better. Its actually pretty disapointing, the stock map seemed more responsive.
our gas apparently is crappy enough to warrant using the 91ACN-OTS maps as they're fairly aggressive (yet the ACN map is more conservative than just 91) from what I've seen. Even the stage 1 maps should be a world of difference in terms of throttle already.

Last edited by DIGGYGV8; 06-29-2014 at 04:58 PM.
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Old 06-29-2014, 05:01 PM   #5
KamekazeSTI
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I try not to use the knock sum feature on the AP. I find it to be too sensitive and doesn't really tell a true health of the engine and tune. Try seeing if any fine knock learn numbers show up. Anything between -1.4 and 0 should be normal for an OTS map. Of course it would be nice if you could log a 3rd gear pull for us to look at too!
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Old 06-29-2014, 06:33 PM   #6
njshred
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Fine knock sum was -1.4-0 and yeah i will do that shortly and post it
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Old 06-29-2014, 07:14 PM   #7
njshred
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Quote:
Originally Posted by DIGGYGV8 View Post

our gas apparently is crappy enough to warrant using the 91ACN-OTS maps as they're fairly aggressive (yet the ACN map is more conservative than just 91) from what I've seen. Even the stage 1 maps should be a world of difference in terms of throttle already.
Should i still use the 91 map if im using 94 octane gas?
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Old 06-29-2014, 09:09 PM   #8
mrjason
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I went down to Blaine to grab some 92 octane from chevron.
My car runs so much better.

I always user Chevron 94 - which, I hear isnt actually that good,

Next fill up (when I dont feel like going to the US) will be at Shell.
From what I hear, Shell 91 should be better than chevron 94.
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Old 06-29-2014, 10:05 PM   #9
njshred
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Quote:
Originally Posted by mrjason View Post
I went down to Blaine to grab some 92 octane from chevron.
My car runs so much better.

I always user Chevron 94 - which, I hear isnt actually that good,

Next fill up (when I dont feel like going to the US) will be at Shell.
From what I hear, Shell 91 should be better than chevron 94.
Interesting, so best to run shell 91 with a 91 map rather than chevron 94?
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Old 06-29-2014, 10:18 PM   #10
Wrgb
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Subscribed for updates on cheaper/better canadian gas idea
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Old 06-29-2014, 11:10 PM   #11
DIGGYGV8
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Quote:
Originally Posted by njshred View Post
Should i still use the 91 map if im using 94 octane gas?
yes 91ACN (make sure it's the Arizona California Nevada(?) map, as it's made for crappier gas) w/ Canadian Chevron 94 seems to give best results for stability. Keep in mind, you may just have had a ****ty tank of gas. I find the further you get from the city (even out to Maple Ridge), and the gas starts getting crappier.

The consensus is:

-US 91 > Canadian 94. Most tuners in the states for example will de-tune you a bit knowing that our gas will knock.

Canadian 94 (as I can't be arsed to fill in the states) from Chevron is the only non-eth gas available locally, and I've never had problems with it. Shell is technically "top tier" gas as well, and I would have no problems throwing in my tank in a jam or something.
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Old 06-30-2014, 10:03 AM   #12
mrjason
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Quote:
Originally Posted by DIGGYGV8 View Post
yes 91ACN (make sure it's the Arizona California Nevada(?) map, as it's made for crappier gas) w/ Canadian Chevron 94 seems to give best results for stability. Keep in mind, you may just have had a ****ty tank of gas. I find the further you get from the city (even out to Maple Ridge), and the gas starts getting crappier.

The consensus is:

-US 91 > Canadian 94. Most tuners in the states for example will de-tune you a bit knowing that our gas will knock.

Canadian 94 (as I can't be arsed to fill in the states) from Chevron is the only non-eth gas available locally, and I've never had problems with it. Shell is technically "top tier" gas as well, and I would have no problems throwing in my tank in a jam or something.
Ethanol does help keep the engine cooler, which is good in a turbo car. That was something that also came out in all my research.
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Old 07-01-2014, 03:22 PM   #13
danny_d19
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According to Cobb:

"Knock sum can be difficult to interpret. Most of the increments you see will happen at low loads, where the knock feedback system is not very accurate. I usually don't pay attention to the actual number itself, just whether it is increasing when you go WOT."
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