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Old 12-03-2018, 11:35 AM   #26
ayau
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I think it's hard to say the winter blend is causing the knock. There are temperature compensation tables that the tuner can adjust.

I do know for me at least, my knock readings are practically 0 in the winter. In the summer, I might get one off -1.41. Seems to me hotter air means a higher chance of knock, which makes sense.
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Old 12-03-2018, 01:28 PM   #27
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Winter gas is notorious for being a worse blend than Summer. Inconsistent octane, etc
They dont just add more ethanol, it's already E10, making it E15 screws with wayyy to many cars that cant compensate for the larger volume of fuel needed

Guys, warm temps cause knock not low temps. You dont start knocking because your car has too much oxygen. Everybody's tune adjust for temperature and environmental changes, ftcl or not.
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Old 12-03-2018, 01:37 PM   #28
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Are you sure they're able to add more than 10% ethanol to pump gas? It clearly states on the pumps 10%. Oil companies could get in trouble for falsifying ethanol content.
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Old 12-03-2018, 01:45 PM   #29
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Reread what I wrote. I said they dont add ethanol.
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Old 12-03-2018, 02:12 PM   #30
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Quote:
Originally Posted by Stija View Post
My temps are in the 40s from 80-90s when I was tuned. But it’s a ftcl tune and adjusts for weather/temp/altitude, etc.

What setup and tune are you running? OTS map or pro e tune? You shouldn’t be knocking with temp changes.
Stock 2018 WRX under 15k miles. It was happening on Cobb 91 and 93 and MAPerformance 91 and 93, stg 1 of course. I was kind of shocked to see knock on the 91 map.
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Old 12-03-2018, 03:07 PM   #31
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Old 12-03-2018, 03:36 PM   #32
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So then what is the deal? Back to cold weather = feedback knock.
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Old 12-03-2018, 03:37 PM   #33
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Quote:
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Are you sure they’re able to add more than 10% ethanol to pump gas? It clearly states on the pumps 10%. Oil companies could get in trouble for falsifying ethanol content.
no, it clearly says "MAY contain UP TO 10% ethanol"

So you are getting anywhere from zero to 10% and nobody on planet earth knows unless you bring one of those floating beaker things to test it yourself at the pump
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Old 12-12-2018, 11:55 PM   #34
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Just a data point:

I was on MAP Stage 1 91 v4 running 92 oct gas and started developing FBK while cruising on the interstate in 6th gear if I encountered even a mild hill. I attributed it to carbon build up in the intake tract and valves (was probably at around 24k miles).

I upgraded to their Stage 1 91 FRN tune and all the highway LSPI FBK went away. I now only get FBK and FKL at low speeds if I'm clumsy with the clutch. My DAM has never dropped below 1.0 on a MAP tune. I watch the short-term fuel trim and I can tell MAP has definitely added a lot more nuance to their fueling strategy, e.g. more fuel for better cooling at higher throttle. I'm pretty happy with the FRN version, which I always assumed stood for "final revision."

I plan on doing TGV/EGR delete in the Spring and Cobb Surgeline is just down the road, so I'll probably be going the dyno tune route then, though there seems to be lots of options in the Portland, OR area.
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Old 12-19-2018, 01:33 PM   #35
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Switched to this new map yesterday, I really like it!
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Old 01-04-2019, 01:36 PM   #36
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Just tried the 91 MA Performance FRN tune and DAM dropped to 0.688 within 6 miles of my commute to work. 91 COBB tune is completely rock solid. Nothing I can do on the COBB 91 tune can drop the DAM it seems. COBB 93 though DOES drop DAM right away pretty much. So while running 93 fuel, I can only run the COBB 91 tune.

COBB 93 and FRN 91 AND FRN 93 all drop DAM very quickly and don't ever go back up. It's so fragile on those tunes... All on shell v power 93, Sunoco 93 and Valero 93 fuel Thoughts? I'm so confused by this behavior. I figured if there was something mechanically wrong, it would see it too on the COBB 91 right?
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Old 01-04-2019, 03:23 PM   #37
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Just tried the 91 MA Performance FRN tune and DAM dropped to 0.688 within 6 miles of my commute to work. 91 COBB tune is completely rock solid. Nothing I can do on the COBB 91 tune can drop the DAM it seems. COBB 93 though DOES drop DAM right away pretty much. So while running 93 fuel, I can only run the COBB 91 tune.

COBB 93 and FRN 91 AND FRN 93 all drop DAM very quickly and don't ever go back up. It's so fragile on those tunes... All on shell v power 93, Sunoco 93 and Valero 93 fuel Thoughts? I'm so confused by this behavior. I figured if there was something mechanically wrong, it would see it too on the COBB 91 right?
No fuels are ever the same. The MAP tune is way too aggressive for the fuel in your area if it's dropping DAM to 0.688.

I would either pump 2-3 gallons of E85 if it's available in your area and try 93 maps again, or you can just run 91 Cobb. You can also get an e-tune. You have a few options available.
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Old 01-04-2019, 03:28 PM   #38
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Quote:
Originally Posted by Dulath View Post
I was on MAP Stage 1 91 v4 running 92 oct gas and started developing FBK while cruising on the interstate in 6th gear if I encountered even a mild hill.
Same thing happened to me with any sort of hill on the MAP 93 tune. I only cruise in 5th, tho. 70mph in 5th is 3k rpms. Eventually I would just avoid cruising on bigger hills (on ramps and exits) and just downshift accelerate.

Protuned for stage 1 now and the hill issue does not happen anymore.
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Old 01-05-2019, 02:30 PM   #39
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I loved the 91 Map Stage 1 so much, i went Map Stage 2 weeks later. So far logs look very good. I'll log more as the weather warms up but so far, perfection.

The Map Stage 1 was great.
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Old 01-05-2019, 09:18 PM   #40
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Quote:
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No fuels are ever the same. The MAP tune is way too aggressive for the fuel in your area if it's dropping DAM to 0.688.

I would either pump 2-3 gallons of E85 if it's available in your area and try 93 maps again, or you can just run 91 Cobb. You can also get an e-tune. You have a few options available.

I put 2 gallons of e85 in and drove it for about 20 miles after letting it sit overnight. The DAM just dropped to 0.58 on the MAP FRN 91. This is scaring me now, what could be wrong with my car? Could my fuel really be that bad? Yet the COBB 91 tune is completely rock solid.

Or has the e85 not mixed well enough and is it just sitting at the top of my tank? Do you think I should run this tank dry so I know I definitely used the ethanol or should I just give up and change maps back to Cobb 91 for now? Maybe try a 3rd gallon of e85?
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Old 02-09-2019, 03:03 PM   #41
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Bringing this back from the dead. Anyone running MAP FRN newest version. How you like or dislike.
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Old 02-09-2019, 03:26 PM   #42
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Bringing this back from the dead. Anyone running MAP FRN newest version. How you like or dislike.
I have it. I love it. Doesn't give up much, if anything in power in comparison to my e-tunes however it does require top notch fuel. Pretty much 2-3 gallons of E85 to see zero knock. I am going to get their E30 tune soon.
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Old 02-09-2019, 03:40 PM   #43
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I have it. I love it. Doesn't give up much, if anything in power in comparison to my e-tunes however it does require top notch fuel. Pretty much 2-3 gallons of E85 to see zero knock. I am going to get their E30 tune soon.


I have the 91 tune have not loaded it yet. Will run 93 to hope protect against some knock. Been running Cobb 93 for a while but hear MAP is a lot smoother. Pretty much all I am looking for that and reliability.
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Old 02-09-2019, 03:58 PM   #44
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I have the 91 tune have not loaded it yet. Will run 93 to hope protect against some knock. Been running Cobb 93 for a while but hear MAP is a lot smoother. Pretty much all I am looking for that and reliability.
No. Run the 93 tune. If you don't have it, email them they will send it to you. You will see knock regardless. NJ gas is pretty good. Use BP or Exxon. Their tune is absolutely amazing. Most people see knock but that is mostly because they don't mess with the sensors IMO.
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Old 02-09-2019, 04:03 PM   #45
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No. Run the 93 tune. If you don't have it, email them they will send it to you. You will see knock regardless. NJ gas is pretty good. Use BP or Exxon. Their tune is absolutely amazing. Most people see knock but that is mostly because they don't mess with the sensors IMO.


Yeah was debating the 93. Was just trying to have some extra protection.
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Old 02-09-2019, 04:19 PM   #46
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Yeah was debating the 93. Was just trying to have some extra protection.
Stop it. It will make little to no difference. They have been tuning these cars since 2014. Go with 93. You will be fine.
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Old 02-09-2019, 04:23 PM   #47
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Stop it. It will make little to no difference. They have been tuning these cars since 2014. Go with 93. You will be fine.


Haha I know I know
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Old 02-10-2019, 02:38 AM   #48
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I have the Map E30 and 91 FRN tunes. Both run great on my 18' with just under 13k on the odo. No knock, not even the infamous -1.41 and DAM stays at a solid 1. If E85 is available close you'll see a big difference with the E30 tune. As always each car is different but mine has been solid on these tunes.
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Old 02-23-2019, 01:33 PM   #49
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Just loaded the new MAP “FRN” version stage 1 and love it so far been driving all day and the smile is back on my face.
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Old 02-23-2019, 03:59 PM   #50
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Just loaded the new MAP “FRN” version stage 1 and love it so far been driving all day and the smile is back on my face.
Heck yes. I cannot wait to try the E30 tune.
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