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05-19-2014, 01:07 PM | #1 |
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Moved to High altitude City and Adv. Mult dropping
My second week in Boulder Colorado coming from St. Louis. I've had the open flash tablet for about 5 months and have never had my Adv. multiplier drop from 1.00. I'm curious if it has to do with being 8000 ft above sea level and having access to only 91 oct now. i would like to go back to e85 but I'm a bit nervous now seeing this in my logs.
Log starts out with my advance multiplier 0.98 at 1669.16 durring a 3rd gear pull it returns to 1.00 at 1961.11 it drops back to 0.98 then at 2220.72 it drop again to 0.96 Drop in Adv Multi means engine knock, yes? http://www.datazap.me/u/kronos/color...t?log=0&data=1 I am now at the mercy of the tuning gurus feedback |
05-19-2014, 02:50 PM | #2 |
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add knock correction and FLKC to your logs and drop vvt intake and exhaust. you will be able to see where knock is occurring. Its probably the 91 octane. If its just bouncing between .96 and 1 and it probably not a big deal.
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05-19-2014, 06:55 PM | #3 |
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As above, if you were running 93 before and now your on 91 it will be the fuel, this is normal on 91 and the ecu is just protecting your engine. by reducing ignition advance due poor fuel, there will also be a performance drop. These cars are designed for 93 any less and you going to get iam drop unless its a specific tune for 91
Your car actually has a atmospheric pressure sensor and will compensate for changes in altitude :-) e85 is a higher octane than 91 or 93 about 105 from memory in your scale, so flash a tune for e85 dose up on corn juice and you will be fine and |
The Following User Says Thank You to steve99 For This Useful Post: | Kronos (05-20-2014) |
05-20-2014, 11:44 AM | #4 |
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Moved to High altitude City and Adv. Mult dropping
Wow is it really that simple ! Haha I hope so. E85 makes me nervous for some reason.
But it will just provide more protection agains knock? And add some more power because it will allow more timing, yes? Come to think of it I never really heard of anybody having problems on e85. Not to mention I'm NA. Completely stock actually. I ran e85 once before for a few months and ran good,aside from cold starts. I guess is just a long terms that make me nervous, not knowing how it affects wear and tear on the fuel lines in the engine over the long haul. Sent from my iPhone using Tapatalk Last edited by Kronos; 05-20-2014 at 12:04 PM. |
05-20-2014, 04:21 PM | #5 | |
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Use an e85 compatible oil and half the service interval on the oil. |
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The Following User Says Thank You to steve99 For This Useful Post: | Kronos (05-20-2014) |
05-21-2014, 12:02 AM | #6 |
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Moved to High altitude City and Adv. Mult dropping
Thanks for the good info Steve. I've heard of people noticing their oil being darker after a shorter period on e85 than on 91-93. Halving the service interval in a goods tip indeed. Thank you. I didn't know about e85 compatible oil. Do you happen to know any good brands? I plan on googling, just curious if you know any go to e85 oils
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05-21-2014, 12:18 AM | #7 | |
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http://www.penriteoil.com.au/product...d_products=250 http://www.penriteoil.com.au/tech_pd...BLE%20OILS.pdf |
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The Following User Says Thank You to steve99 For This Useful Post: | Kronos (05-22-2014) |
05-21-2014, 12:46 AM | #8 |
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Here's a log of my BRZ in the same area (I drive it everyday in Boulder log was in Longmont).
http://datazap.me/u/stugray/za1ja00c...og=0&data=7-41 IAM rock solid at 1, and 91 gas. 100% stock. OFT stage 1. Am I looking at the same "IAM" as you? We tend to knock less here because of the high altitude so 91 oct is fine. |
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05-21-2014, 03:58 AM | #9 |
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His IAM only dropped to 0.96 , yes he could continue to run 91 no problem.
Tip in knock that causes the IAM to drop in the 2000-3000 rpm area has a lot to do with driving style and how aggressive you are on the throttle at low rpm in a high gear. I can get it to happen on E85 thats 105+ octane if I drive aggressively in that area in high gear. By the way your pulling about -1.5 degrees FLKC arround 5500 rpm so 91 not all that good http://datazap.me/u/stugray/za1ja00c...-35-41&solo=35 |
05-23-2014, 10:58 AM | #10 | |
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Also to note, whatever afr max power is on pump gas, go ahead and run about half a point less on e85 to pick up some extra horsepower. Max power on pump gas in my civic is 13:1. On e85 it's 12.5:1 |
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05-23-2014, 05:29 PM | #11 | |
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The E85 we get here is rated 105 RON, yours probably rated MON |
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05-26-2014, 12:56 PM | #12 | |
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Still trying to learn how to read the logs. |
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05-26-2014, 06:43 PM | #13 | |
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IAM does not always drop on knock events, IAM is the ecu,s last line of defence it will only drop on repeated knock events over a certian threshold in a certian period of time. So you can have a certian amount of flkc and fbkc without iam drop in that log you have flkc of up to 1.3 in places. |
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The Following User Says Thank You to steve99 For This Useful Post: | stugray (05-26-2014) |
05-29-2014, 11:12 AM | #14 | |
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But it is actually more like 94-95 octane apparently. Doesn't perform like that in practice though. |
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