PupkinRacing

Datalog mhd stage 2+ Tons of timing corrections -help?

PupkinRacing

Specialist
Aug 31, 2017
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Madison, Wisconsin
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Bmw 135i

NoGuru

Captain
Jan 9, 2018
1,102
484
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Just North of Detroit
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BMW 335is
I don't think those are that bad. I mean you will always see some corrections here and there.
Try and running a gallon or two of Ethanol if you have access to it and see what happens.
Other wise it could be a million things but over all I would not be too concerned with it unless you are trying to set some records.
 

PupkinRacing

Specialist
Aug 31, 2017
69
20
0
Madison, Wisconsin
Ride
Bmw 135i
I don't think those are that bad. I mean you will always see some corrections here and there.
Try and running a gallon or two of Ethanol if you have access to it and see what happens.
Other wise it could be a million things but over all I would not be too concerned with it unless you are trying to set some records.
I do have access to ethanol so I’ll give that a shot. The problem I’m having is I’m running slower than a bone stock m4. Both 1/4 mile times and 60-130. And i have catless downpipes and a tune. Something is seriously wrong with the car and nothing else really stood out to me besides the timing corrections
 

NoGuru

Captain
Jan 9, 2018
1,102
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Just North of Detroit
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BMW 335is
I do have access to ethanol so I’ll give that a shot. The problem I’m having is I’m running slower than a bone stock m4. Both 1/4 mile times and 60-130. And i have catless downpipes and a tune. Something is seriously wrong with the car and nothing else really stood out to me besides the timing corrections
Yes but you have so many variables still.
Is the fuel you are running clean or a good fuel?
What plugs and gap?
How old are the plugs?
What coils?
How old are the coils?
Are you air filters dirty?
What elevation are you at?

My point is, try and fill in some of the gaps. That can help tell the story of how the car is running and why.
 

PupkinRacing

Specialist
Aug 31, 2017
69
20
0
Madison, Wisconsin
Ride
Bmw 135i
Yes but you have so many variables still.
Is the fuel you are running clean or a good fuel?
What plugs and gap?
How old are the plugs?
What coils?
How old are the coils?
Are you air filters dirty?
What elevation are you at?

My point is, try and fill in some of the gaps. That can help tell the story of how the car is running and why.
Yea sorry I can fill in the gaps, so..

I’ve tried 3 different gas stations and variations of stage 2+ 91 oct and 93 oct. even went down to stage 2 91 oct. same results. I went way slower than stock m4 times on all tunes but specially the stage2 was unreal slow.

Crank hub and plugs were done 2k miles ago. Ngk 97506s bought from fcpeuro that should’ve been gapped correctly, however I had the shop install these so I can’t confirm the gap is correct. This was going to be my next move.

Coil packs I’m assuming are stock, I bought the car with 56k miles on it currently has 62k miles. But wouldn’t I be getting actual misfires if the coil packs were bad?

Air filters are clean, I just removed the charcoal filters and inspected the air filters at the same time that I tuned the car.

basically at sea level I’ll attach my best draggy run on stage2+ 91oct
1F95BEB0-EEB0-4C5F-AED5-B251E4AC263D.png
 

NoGuru

Captain
Jan 9, 2018
1,102
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Just North of Detroit
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BMW 335is
I see what you mean, 10 seconds is not that good.

I would do the plugs yourself and not trust the shop to check the gap and make sure it is correct.

For the coils, I am not sure if it would only throw a misfire. If they are the original I would replace them anyway. Any time you modify your car changing out any maintenance item will help ensure optimal performance.

Also I have not used MHD is some time but I think you could run an older map and see how it runs.
 

PupkinRacing

Specialist
Aug 31, 2017
69
20
0
Madison, Wisconsin
Ride
Bmw 135i
I see what you mean, 10 seconds is not that good.

I would do the plugs yourself and not trust the shop to check the gap and make sure it is correct.

For the coils, I am not sure if it would only throw a misfire. If they are the original I would replace them anyway. Any time you modify your car changing out any maintenance item will help ensure optimal performance.

Also I have not used MHD is some time but I think you could run an older map and see how it runs.
Yea I guess the spark plugs and coils will be my next move. Hoping it’s something as simple as the shop just didn’t gap the plugs correctly. The s55 mhd app doesn’t have the older maps like the N54 app does. So unfortunately that’s not an option. Thanks for the suggestion and insight. I’ll report back once I’ve changed the plugs and coils and see if it’s helped.
 
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PupkinRacing

Specialist
Aug 31, 2017
69
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Madison, Wisconsin
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Bmw 135i
@NoGuru well here is a slight update. Pulled all the plugs and they were all perfectly gapped. Glad I can finally trust a shop to do what I ask lol.

So my tuner got back to me after looking at the log and also suggested the fuel was bad. Must just be this part of the country with shit fuel because I really did try full tanks of gas from 3 different stations in completely different areas. (30+ miles apart). So in a last ditched effort while I wait for a custom tuned I tried adding ethanol and flashing the mhd stage 2+ e30 map. WOW! Is all I could say, completely what my car needed. First crack off the draggy ran a 8.28 60-130. Backed it up with consecutive 8.2 runs. Also grabbed a log so here it is, timing corrections look a little better but i don’t completely know what I’m looking at. Guess I’ll be sticking to ethanol tunes. Not sure why the 91/93 maps weren’t working for me.


C4B2BE0B-1D49-4083-8616-A235C752E016.png
 

NoGuru

Captain
Jan 9, 2018
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Just North of Detroit
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BMW 335is
Yeah E is what cars crave :) but really it is about 105 octane so mixing a couple of gallons with shit gas can really help.
I would always try and run a couple of gallons unless you are tuned for it and can run a good E40 mix or whatever you can run. It will depend on your fuel system and tuner.
 

scrllock

Sergeant
Dec 17, 2018
267
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2011 335xi
5 degree correction with ethanol is still pretty bad, IMO. a few degrees on pump is normal. try using the pump gas map with a couple gallons of ethanol.

when you say plugs are gapped correctly, what gap is that exactly?
 
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PupkinRacing

Specialist
Aug 31, 2017
69
20
0
Madison, Wisconsin
Ride
Bmw 135i
5 degree correction with ethanol is still pretty bad, IMO. a few degrees on pump is normal. try using the pump gas map with a couple gallons of ethanol.

when you say plugs are gapped correctly, what gap is that exactly?
Going to be getting the car dialed in on a custom tune this week but the plugs are ngk 95706 gapped at .022