[M4TW]

Originally Posted by nikitino25

Does the ECU have to kind of "learn" the new map each time you change it? Are you supposed to do a few pulls to kind of "break in" the new map?

The adaptation is fast but not instantaneous. I found that out at the track when I switched maps between runs. With no adaptation it will start out like it's in third gear then it kicks in. The next time I just drove it around the pits a bit in first until I could feel the power come back and I was good to go.

[VNeBLOB42]

Originally Posted by benzy89

PS -- I got my hands on some E85 finally. Mixed it ~20% (3 gallons) with a base fuel of 93. Stage 2+ Aggressive The car purr'd & was flying thru the gears[/b]

I was getting timing pulls on S1 sport with CA 91. So this morning did the same that you did but with 91. = about 93.8 octane. I could feel the difference. Going to do some logging tonight and see if my timing is better. If all is well may go up to S1 Aggressive.

Curious what is your cost per gallon? At shell, Sacramento, its $3.15

[Monster335]

Originally Posted by benzy89

Is it causing misfires? Rough idle? Etc?







Only the Access TunerPro's have access to the v402 Beta Maps, we should be seeing them in the next couple of weeks hopefully




Even with a flash based tune there is a small "adaptation" timeframe (much smaller than with a plug-in), so a couple 3/4 gear pulls + it'll be ready to go


PS -- I got my hands on some E85 finally. Mixed it ~20% (3 gallons) with a base fuel of 93. Stage 2+ Aggressive The car purr'd & was flying thru the gears

There some small sputtering when driving but not much. As for rough idling, I have not noticed it being rough at all. Thx

[benzy89]

Originally Posted by VNeBLOB42

Curious what is your cost per gallon? At shell, Sacramento, its $3.15

Think it was ~$3.40s, which is great when you consider that race gas is closer to $6 a gallon. My only complaint, the closest gas station to me with E85 was in the fucking hooooood. Was rushing to throw 3 gallons into my car, another 3 gallons into a gas can + then flash to Stage 2+FMIC Aggressive Now it's going to become an adventure finding E85 stations

Originally Posted by Monster335

There some small sputtering when driving but not much. As for rough idling, I have not noticed it being rough at all. Thx

How many miles? The rough idle & occasional sputtering are symptoms of clogged intake valves. Walnut blasting them clean is recommended every 40-50k (depends from car to car, how aggressively tuned it is, if the car has an OCC, etc).

[VNeBLOB42]

Originally Posted by benzy89

Think it was ~$3.40s, which is great when you consider that race gas is closer to $6 a gallon. My only complaint, the closest gas station to me with E85 was in the fucking hooooood. Was rushing to throw 3 gallons into my car, another 3 gallons into a gas can + then flash to Stage 2+FMIC Aggressive Now it's going to become an adventure finding E85 stations

Nice.... Don't Get Jacked .. LOL

Yeah I am fortunate to have many here in the greater Sacramento Area. Did some pulls this morning, and what I think, it appears to be awesome. timing appears to be where it should be. I am gonna post my logs to have COBB check it out and or who ever is interested. Radar has been helping me out and I think his suggestion to go E85 was the right move . I'll post here in a few to share my experience for other noobs like me.

[benzy89]

Originally Posted by VNeBLOB42

Nice.... Don't Get Jacked .. LOL

Yeah I am fortunate to have many here in the greater Sacramento Area. Did some pulls this morning, and what I think, it appears to be awesome. timing appears to be where it should be. I am gonna post my logs to have COBB check it out and or who ever is interested. Radar has been helping me out and I think his suggestion to go E85 was the right move . I'll post here in a few to share my experience for other noobs like me.

Haha seriously, feel like it was NASCAR pit crew + running from the pump, throwing shit in the trunk, flashing + then burning out from the gas station

Since the COBB isn't tuned for E85 yet, a 20% blend is ideal (3 gallons of E85 in 1 full tank of gas). It'll let you kill any timing corrections, give you a nice bump in HP + save some money (compared to Race Gas)

Makes you wonder how many ponies the COBB (which can go more in-depth with its tuning compared to the plug-in tunes) will be able to get out of a 50:50 E85 mix if an FBO PROcede N54 is getting 425 WHP/488 WTQ (no meth)
http://www.e90post.com/forums/showthread.php?t=684738

[rader1]

There's a couple problems with running an e85 blend map, namely controlling the mixture. As time goes on and the number of fill ups goes up then the percentages will become harder and harder to maintain precisely. Which means the tune will have to always be considerably on the safe side.

IMO the e85 blend is most useful to just offset poor octane fuels to allow for the running of the "Aggressive maps." I know, I know there are ATR guys making improvements with e85 blends but that will require CONSTANT monitoring to ensure it's running properly every time you fill up.

When we finally find out if the fuel system can support 100% e85 is when we'll see really what e85 can to do reliably.

[VNeBLOB42]

Though this may be old news to other enthusiasts but wanted to share my experience.

2007 335i E92
July 2007 build date
Ca. 91 Octane
Dual Cone Intake
Spark Plug replacement April 2012
Walnut Shell Blasting 1st wk of June 2012
COBB Stage 1 Sport Last wk of June 2012
48,000 miles current

Flashed my AP one evening (Wed. June 27th) and started with S1 Sport. Did a few WOT pulls that night.. Must say WOW.. Ran this for a couple of days to ensure the car was adapted fully.

1st Log: S1 Sport v3.01
Since I was new to logging I really didn't know how to log. Did some research on here and found this thread.. http://www.e90post.com/forums/showthread.php?t=696472
I highly recommend all new COBB users to read.
Did three pulls and posted my logs for review. Even to me something didn't look right, boost was down to 8psi IAT temp was very high (130-150). Outside Air was approx. 76 deg. Not sure what was up with my first pulls but the only thing I could think of was the road was choppy and the car may have been loosing traction. DTC/DSC was off.

2nd Log: S1 Sport v3.01 DTC off
Hooked up with my buddy and did some more pulls a few days later. OA was approx. mid 70's again and was at night. Did three more pulls and the timing and boost looked a lot better. But was still getting some timing pulls and the IAT were high (130-160). But boosts was recording in the 12-13 psi with some spikes of 14. After this log it came down to process of elimination.

Ca. 91 and IAT temps. I got some great feedback on here and was told to try 20% of E85 (3 gallons to full tank of 91).

3rd Log: S1 Sport v4.01 DTC off

So I waiting for my tank to drop to 50% and I put in 3 gallons of E85 and top it off with Ca. 91 (yesterday morning). I loaded the v4.01 the day prior (Friday). Ran this all day yesterday (Saturday) to ensure the car was adapted fully. I really could feel the difference, combination of E85 and v4.01.

This morning I did 4 more pulls, OA was mid 60's. The car felt really good. attached are my pulls from this morning and seeking some professional review. As I am a noob, and the logs appear to be good to me, but not fully sure.

last pull recorded STFT and LTFT, got close to 30% though, not sure if its good or bad.

Purchasing a FMIC very soon.

thanks everyone for the help and advice!
Vince..

[benzy89]

Originally Posted by rader1

There's a couple problems with running an e85 blend map, namely controlling the mixture. As time goes on and the number of fill ups goes up then the percentages will become harder and harder to maintain precisely. Which means the tune will have to always be considerably on the safe side.

IMO the e85 blend is most useful to just offset poor octane fuels to allow for the running of the "Aggressive maps." I know, I know there are ATR guys making improvements with e85 blends but that will require CONSTANT monitoring to ensure it's running properly every time you fill up.

When we finally find out if the fuel system can support 100% e85 is when we'll see really what e85 can to do reliably.

I agree that it's difficult to maintain a complete accurate blend since it's not like you can go to a gas station and buy 93:E85 premixed lol

I'm keeping some spare E85 in my garage for those days where I feel like letting the beast loose & running the Aggressive Mapping (I usually use Stg 2+ Drive/Sport for my DD mapping). IMHO, a 20% blend is fairly conservative & is a safe bump for the COBB. I don't know if I'd ever run 100% E85 just because we have no idea how the fueling system will respond

[dfv2]

My pumps must be weird, they have gallon readouts! I pump exactly 4gal of e85 and then 6gal of 93.

This is all just fun and games until Cobb supports full 100% e85. These mix maps relying on stft are just silly, but it's a stopgap till the real fun begins.

[VNeBLOB42]

Sorry COBB off Topic............

I have been contemplating on this for a little while. I think the issue is not the first fill up mix. The first mix is the baseline, 80/20. Which is the easiest to get the correct mix. But the next fill, is where radar was saying that its more difficult to get the 80/20 mix.

80/20 mix of a 16 gallon tank. 3.2g E85 and 12.8g 91

first fill up mix 3.2 gallons of E85, +- 12.8 gallons of 91 = 16 gallon tank

second fill up mix. you have to gauge the gallons left. @ 1/4 tank I have approx. 80/20 mix still. Thus, 20% of 4 Gallons (4 total gallons at 1/4 tank) is roughly .8 gallons of E85 mix.

So I must add 2.4 gallons of E85 (Which is 20% of a 3/4 tank) and top the rest off with 91 to maintain the 80/20. (NOT adding 3 more gallons of E85)

So each time you fill up, you must gauge 20% of what is left in your tank and subtract 3.2 gallons (3 g) to get the delta of what to add to maintain the 20% E85.

does this sound right? I believe my logic and math is correct.

in all reality this is just a way to maintain 80/20 as best you can. on the pump i used, it said. "min. 75% ethanol and 85% max." so even the gas itself has fluctuation.

[rader1]

Originally Posted by VNeBLOB42

Sorry COBB off Topic............

I have been contemplating on this for a little while. I think the issue is not the first fill up mix. The first mix is the baseline, 80/20. Which is the easiest to get the correct mix. But the next fill, is where radar was saying that its more difficult to get the 80/20 mix.

80/20 mix of a 16 gallon tank. 3.2g E85 and 12.8g 91

first fill up mix 3.2 gallons of E85, +- 12.8 gallons of 91 = 16 gallon tank

second fill up mix. you have to gauge the gallons left. @ 1/4 tank I have approx. 80/20 mix still. Thus, 20% of 4 Gallons (4 total gallons at 1/4 tank) is roughly .8 gallons of E85 mix.

So I must add 2.4 gallons of E85 (Which is 20% of a 3/4 tank) and top the rest off with 91 to maintain the 80/20. (NOT adding 3 more gallons of E85)

So each time you fill up, you must gauge 20% of what is left in your tank and subtract 3.2 gallons (3 g) to get the delta of what to add to maintain the 20% E85.

does this sound right? I believe my logic and math is correct.

in all reality this is just a way to maintain 80/20 as best you can. on the pump i used, it said. "min. 75% ethanol and 85% max." so even the gas itself has fluctuation.

That's the point i was making. It'll be close but not close enough IMO to develop a map that takes FULL advantage of the e85 mix.

[Carl Morris]

You guys worry too much about this stuff. If you are given or develop a map using 20% E85 (which is what I'm doing) just make sure you have more than 20%. Adding 3 gallons every fill-up is fine. Yeah, sometimes you're going to end up with closer to 25+% depending on how soon you fill up. It doesn't matter. Just try to have at least 20%. If you throw a lean code you know you've got too much E85. But you won't. It'll be fine...

[VNeBLOB42]

Originally Posted by Carl Morris

You guys worry too much about this stuff. If you are given or develop a map using 20% E85 (which is what I'm doing) just make sure you have more than 20%. Adding 3 gallons every fill-up is fine. Yeah, sometimes you're going to end up with closer to 25+% depending on how soon you fill up. It doesn't matter. Just try to have at least 20%. If you throw a lean code you know you've got too much E85. But you won't. It'll be fine...

True, not really worried just overthinking it.

[rader1]

Originally Posted by Carl Morris

You guys worry too much about this stuff. If you are given or develop a map using 20% E85 (which is what I'm doing) just make sure you have more than 20%. Adding 3 gallons every fill-up is fine. Yeah, sometimes you're going to end up with closer to 25+% depending on how soon you fill up. It doesn't matter. Just try to have at least 20%. If you throw a lean code you know you've got too much E85. But you won't. It'll be fine...

Yeah, im just a worrier when it comes to this stuff lol It's an hour drive for me to even get e85 so im not really super interested in it at this point anyway.

Maybe once i get my meth map and i get used to that maybe i'll get the itch again and start fiddling with e85 lol

[dfv2]

You guys don't have to *fill* the tank, and why would you anyways..? Pump the same easy ratio each fill up. 30%..? pump 3 gallons e85 and 7 gallons of swine gas. Be on your way and don't cry too much about the gauge not being pegged full for 2 days. I've seen 8th grade math being used in this thread and it must stop.

[JStang]

I have been running the alpha V4.02 Aggressive stock throttle map since Sunday morning. So far, I can confirm that the map is much more smooth than the V4.01 Beta.

However, this has been a common theme with each new map released being more smooth than the previous map. Hopefully they have it right but I'm sure there is going to be room for improvement.

I will post some logs in a day or two for those of you (which is probably most of you) that can read the logs better than I can. I need to do some reading on logging so I'm not such a noob.

I then plan to add a couple of gallons of E85 to the tank this week and log again so we can see the difference in the logs.

In addition, I am supposed to get on the dyno Saturday morning for an ATP appointment in which I plan on having a custom 60/40 E85 map. I will be sure to have dyno's made on map 0, V4.02 alpha, and the 60/40 E85 map for all to see.

I'm stoked!

[max_k20]

Can someone confirms my log for stg 1 agressive are fine ? Running shell v-power 91 + nos octane booster. From my understanding its running fine but making sure.

Just rename file to .zip and included 1 long regular driving run, 1 short driving run and a 3rd only. Thanks for help !

[timtech]

Originally Posted by max_k20

Can someone confirms my log for stg 1 agressive are fine ? Running shell v-power 91 + nos octane booster. From my understanding its running fine but making sure.

Just rename file to .zip and included 1 long regular driving run, 1 short driving run and a 3rd only. Thanks for help !

It would be best to make a good solid wide open throttle 3rd gear run from ~2500 - 6800 log.

[max_k20]

Originally Posted by timtech

It would be best to make a good solid wide open throttle 3rd gear run from ~2500 - 6800 log.

Will do tonight was beeing a little more conservative. Guyz don't check regular driving as well ? I remember in my civic needing to do regular driving log as well to see knock and afr and all those. Anything more I should log ? Will do a 3rd speed run tonight then.

[rader1]

Originally Posted by max_k20

Can someone confirms my log for stg 1 agressive are fine ? Running shell v-power 91 + nos octane booster. From my understanding its running fine but making sure.

Just rename file to .zip and included 1 long regular driving run, 1 short driving run and a 3rd only. Thanks for help !

It's best to do a couple logs of 2nd-3rd gear and then a couple logs of just 3rd gear.

When logging normal, low load driving Cobb retains pretty much stock BMW logic. Its only when requesting higher load do you learn how the car is liking the tune.

Here's a little DIY to get you started
http://www.e90post.com/forums/showthread.php?t=696472

[max_k20]

Originally Posted by rader1

It's best to do a couple logs of 2nd-3rd gear and then a couple logs of just 3rd gear.

When logging normal, low load driving Cobb retains pretty much stock BMW logic. Its only when requesting higher load do you learn how the car is liking the tune.

Here's a little DIY to get you started
http://www.e90post.com/forums/showthread.php?t=696472

I was looking for that thread !!!

From my understanding my logs 2-3 looks good but i'm posting them here to make sure ! Just rename to .csv Thanks