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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > BMW N54 AccessPORT Beta Race Fuel and E-30 Maps



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      10-11-2012, 10:00 AM   #199
raceyBMW
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The only pulls I see are at the shift, which I thought was normal...maybe not? Am I maxing timing at the end of 4th gear? Hmm, maybe not good then.

I have my stage 2+Aggressive graphs from a couple months ago at home I can post this evening.

edit: I was able to dig up one. I have about the same drop at the shift (no timing corr. here, sorry).

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      10-11-2012, 10:21 AM   #200
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But you haven't logged timing corrections on all cylinders.
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      10-11-2012, 11:58 AM   #201
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Yeah, I did on that stage2+ graph, I just didn't plot them. I will get something later that show it.

So last time I showed my graphs to Cobb, they didn't think anything bad about the timing pulls at the shift, so I never really gave them much consideration. Is this something I need to be careful of? I am auto BTW. Also, I filled up with race gas at the drag strip, so probably never put more than about a mile or two on the car with the race gas in (6 gal of 104 with 2 gal of 91 still in the tank) and the race gas map loaded.
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      10-11-2012, 12:16 PM   #202
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The only pulls I see are at the shift, which I thought was normal...maybe not?
It can be normal with the OTS maps, but it can be mostly or completely tuned out. Your timing pulls were big enough to warrant some work in that area if you have ATR. I was having similar issues before I modified their OTS E30 map.
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      10-11-2012, 01:21 PM   #203
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stupid question: but I might be planning try the e30 maps out tonight, but I'll be taking a small road trip with the gf the next day. will it be fine if I drive on the E30 maps over a long distance? or should i switch to s2+ just to be safe?
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      10-11-2012, 02:05 PM   #204
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It can be normal with the OTS maps, but it can be mostly or completely tuned out. Your timing pulls were big enough to warrant some work in that area if you have ATR. I was having similar issues before I modified their OTS E30 map.
So not completely unexpected, but can be tuned out? Good to know, and probably why this is still a Beta. I am at least not getting pulls throughout the gear. Does the flat lining of the cyl. 1 timing in 4th gear toward the end of the run mean I am running out of timing?

Boost was still very similar to stage 2+Aggressive.

Since I still have some race gas in the tank, I'm going to go log on stage 2+aggressive and sport tonight to see if I am getting the timing drops at the shift.
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      10-11-2012, 02:08 PM   #205
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stupid question: but I might be planning try the e30 maps out tonight, but I'll be taking a small road trip with the gf the next day. will it be fine if I drive on the E30 maps over a long distance? or should i switch to s2+ just to be safe?
You will have no problems with the proper mixture just expect worse fuel economy.
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      10-11-2012, 03:15 PM   #206
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stupid question: but I might be planning try the e30 maps out tonight, but I'll be taking a small road trip with the gf the next day. will it be fine if I drive on the E30 maps over a long distance? or should i switch to s2+ just to be safe?
Shouldn't be an issue, but keep in mind that it may be difficult to find more E85 if you're going very far and need to fill up again on the road.
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      10-11-2012, 03:18 PM   #207
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Does the flat lining of the cyl. 1 timing in 4th gear toward the end of the run mean I am running out of timing?
When I see that it's because my intercooler is heat soaked and timing is being pulled due to charge temp. I'd have to look a the tables again, but I *think* 130s is high enough to start seeing that.
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      10-11-2012, 04:32 PM   #208
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Are you on an OTS map or ProTuned? If you get an intercooler, you'll could probably hit 400.
I'm on the E-30 OTS Map. Either a ETS or VRSF IC is the next mod on my list.

I still need to check the datalogs on those dyno pulls, my charge air intake temps must have been through the roof. My buddy called me and told me about 3 DYNO pulls for $40 so the setup wasn't all that great. The fans were weak and barely pointed in my cars direction.

I'll post them up logs tonight.
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      10-11-2012, 04:45 PM   #209
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When I see that it's because my intercooler is heat soaked and timing is being pulled due to charge temp. I'd have to look a the tables again, but I *think* 130s is high enough to start seeing that.
My IAT's were less than 110°F last night the entire night, so I don't think its due to that.
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      10-11-2012, 05:51 PM   #210
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My IAT's were less than 110°F last night the entire night, so I don't think its due to that.
I thought you were referring to the last log you posted above, which looked like it hit about 135.
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      10-11-2012, 05:56 PM   #211
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Went back in the thread and looked at your log from last night. It went flat once the timing correction decayed back to zero. At that point you were at fairly high rpm. I agree that it's suspiciously flat, but 13.5 is about where those OTS race maps seem to max out at for higher load levels. It might just be the map.
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      10-11-2012, 08:01 PM   #212
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Went back in the thread and looked at your log from last night. It went flat once the timing correction decayed back to zero. At that point you were at fairly high rpm. I agree that it's suspiciously flat, but 13.5 is about where those OTS race maps seem to max out at for higher load levels. It might just be the map.
My understanding of the O2 sensors is that read Lambda and just output AFRs as a reference. Stoich for ethanol is ~9:1. So 9:1 equals 1 lambda, that means at if you're running 10:1 ethanol its going to read it as 1.1 lambda. Which in turn is going to be "artificially" lean AFRs because the AFRs are converted for gasoline. I could be wrong on this though...
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      10-12-2012, 12:37 AM   #213
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??? I'm confused about you bringing up fuel issues when I was talking about timing?
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      10-12-2012, 09:15 AM   #214
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??? I'm confused about you bringing up fuel issues when I was talking about timing?
Haha, my bad. I got this thread and another mixed up and when i saw where you said 13.5 I glossed over the rest and assumed you were talking AFRs
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      10-12-2012, 10:26 AM   #215
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Tried the e30maps for the first time but i dont think that my fuel trims looks to good??
Should be approx E30-E35 in my tank atm.
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      10-12-2012, 10:35 AM   #216
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Tried the e30maps for the first time but i dont think that my fuel trims looks to good??
Should be approx E30-E35 in my tank atm.
Fuel trims are fine as long as you aren't close to +/- 34%.
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      10-17-2012, 12:32 PM   #217
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Going to run the 100 map tonight, will I be okay if I run my car down to 1/2 gallon or so (10 miles till empty) of 91 then put 8 gallons of 100 in it?
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      10-17-2012, 04:51 PM   #218
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So, based on racey BMW's experience, is the concensus not to run the race map at this time, due to possible extreme timing drops. I am headed to the race track (one with turns) for several 30min sessions, and I am now worried about running the race map for that long. Maybe I should stick to stage 2+ FMIC aggressive? Any benefits to adding 100 octane gas to stage 2+ aggressive? (full tank of ~95 octane)
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      10-17-2012, 06:12 PM   #219
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So, based on racey BMW's experience, is the concensus not to run the race map at this time, due to possible extreme timing drops. I am headed to the race track (one with turns) for several 30min sessions, and I am now worried about running the race map for that long. Maybe I should stick to stage 2+ FMIC aggressive? Any benefits to adding 100 octane gas to stage 2+ aggressive? (full tank of ~95 octane)
Why would you run the 100 octane map with 95 octane gas in your tank, that's asking for problems.
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      10-17-2012, 06:36 PM   #220
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So, based on racey BMW's experience, is the concensus not to run the race map at this time, due to possible extreme timing drops. I am headed to the race track (one with turns) for several 30min sessions, and I am now worried about running the race map for that long. Maybe I should stick to stage 2+ FMIC aggressive? Any benefits to adding 100 octane gas to stage 2+ aggressive? (full tank of ~95 octane)
From what I saw I'd hold off on running that map on a road course and just stick with a known good map for extreme use. I'd want to do some serious tuning on the race map before hammering it for 30 minutes at a time, even with 100 octane. If it turns out your car has zero issues with it, great...but I'd want to be sure first. The nice thing about aggressive timing is that it keeps the EGTs down, but you don't want to be knocking all the time under those conditions.
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