1/4mi 60-130 Dragy Tips and Tricks

Velon · 11-15-2021, 01:22 PM

This is my best 100-200 on the f90

100% stock hardware, 2018 f90
Swedish 98 octane fuel which isn't anywhere near 98 but it's the best we have apart from e85.

Powerlab Sweden/HP Performance ECU/TCU stage 1

Next year I will remove the upper cats and maybe try a e30 map.
But I'm very pleased with the car, the TCU map changed the gearchanges to feel like a DCT gearbox (very familiar to my old f80) and driven easy it still feels stock.
Ofc there are faster cars here but I wonna keep my rods in my engine for now 🤣

GTATX · 11-15-2021, 01:31 PM

Quote:

Originally Posted by DrivenAgain

1st pull in neg DA with new tune and TCU. Car is hitting much harder all across the power band, TCU seemed to smooth out the power delivery.

2018 M5 CCBs Carbon Roof
Project Gamma Intake
Project Gamma Lower Downpipes/Stock Uppers
Utku Noa Performance E40
Utku Noa Performance TCU

Great numbers bud.

DrivenAgain · 11-16-2021, 04:10 PM

Quote:

Originally Posted by GTATX

Great numbers bud.

thanks man, supposed to do a private track event this weekend so I can finally get some 1/4 data. I have the TCU now but my car is still impossible to launch, wheel spin or bog no in-between.

GTATX · 11-16-2021, 08:25 PM

Quote:

Originally Posted by DrivenAgain

Quote:

Originally Posted by GTATX

Great numbers bud.

thanks man, supposed to do a private track event this weekend so I can finally get some 1/4 data. I have the TCU now but my car is still impossible to launch, wheel spin or bog no in-between.

As soon as flags show up launch don't build boost. My best was 2.63 recently.

DrivenAgain · 11-18-2021, 04:01 PM

1/4mi track day coming up on Saturday. My tune is dialed in and I'm ready.

eric97hoh · 11-19-2021, 12:28 PM

Quote:

Originally Posted by DrivenAgain

1/4mi track day coming up on Saturday. My tune is dialed in and I'm ready.

hope you do well expecting immaculate results !

DrivenAgain · 11-20-2021, 06:38 PM

Not the results I was expecting, but it's nice to have the data to back it up. Although a personal best on an actual drag strip, I have gone faster. This has happened before where I get a bad or low low batch of Ethanol. My trims were low and average timing was off 5* I am happy with the trap speed. I'm going to go back to focusing on 60-130 and dial my fuel back in. I'll be back!!

onfireX5 · 11-20-2021, 06:55 PM

Quote:

Originally Posted by DrivenAgain

Not the results I was expecting, but it's nice to have the data to back it up. Although a personal best on an actual drag strip, I have gone faster. This has happened before where I get a bad or low low batch of Ethanol. My trims were low and average timing was off 5* I am happy with the trap speed. I'm going to go back to focusing on 60-130 and dial my fuel back in. I'll be back!!

Mph looks good. Track looks a bit slick due to the 60ft. What was the 60-130 on that pass ?

DrivenAgain · 11-20-2021, 07:01 PM

Quote:

Originally Posted by onfireX5

Quote:

Originally Posted by DrivenAgain

Not the results I was expecting, but it's nice to have the data to back it up. Although a personal best on an actual drag strip, I have gone faster. This has happened before where I get a bad or low low batch of Ethanol. My trims were low and average timing was off 5* I am happy with the trap speed. I'm going to go back to focusing on 60-130 and dial my fuel back in. I'll be back!!

Mph looks good. Track looks a bit slick due to the 60ft. What was the 60-130 on that pass ?

This is also off. I just went 6.27 at -464 the other night.

SGMM5 · 11-20-2021, 07:37 PM

Quote:

Originally Posted by DrivenAgain

Quote:

Originally Posted by onfireX5

Quote:

Originally Posted by DrivenAgain

Not the results I was expecting, but it's nice to have the data to back it up. Although a personal best on an actual drag strip, I have gone faster. This has happened before where I get a bad or low low batch of Ethanol. My trims were low and average timing was off 5* I am happy with the trap speed. I'm going to go back to focusing on 60-130 and dial my fuel back in. I'll be back!!

Mph looks good. Track looks a bit slick due to the 60ft. What was the 60-130 on that pass ?

This is also off. I just went 6.27 at -464 the other night.

Curious what track you were at? I'm in MD too, was def a little chilly today and I'm sure traction wasn't ideal along with the fuel letting you down.
My best 1/4 times have been 1.61-1.65s in the 60'. Your trap speed is pretty strong, I've never been over 132.
Your 60-130 time smokes mine 😂

DrivenAgain · 11-20-2021, 07:49 PM

Quote:

Originally Posted by SGMM5

Quote:

Originally Posted by DrivenAgain

Quote:

Originally Posted by onfireX5

Quote:

Originally Posted by DrivenAgain

Not the results I was expecting, but it's nice to have the data to back it up. Although a personal best on an actual drag strip, I have gone faster. This has happened before where I get a bad or low low batch of Ethanol. My trims were low and average timing was off 5* I am happy with the trap speed. I'm going to go back to focusing on 60-130 and dial my fuel back in. I'll be back!!

Mph looks good. Track looks a bit slick due to the 60ft. What was the 60-130 on that pass ?

This is also off. I just went 6.27 at -464 the other night.

Curious what track you were at? I'm in MD too, was def a little chilly today and I'm sure traction wasn't ideal along with the fuel letting you down.
My best 1/4 times have been 1.61-1.65s in the 60'. Your trap speed is pretty strong, I've never been over 132.
Your 60-130 time smokes mine 😂

Hey man. I was at Maryland International Raceway private track rental. My car refuses to 60ft and get a good leave, spins or bogs. It does well on 60-130 very happy there.

SGMM5 · 11-20-2021, 09:04 PM

Nice. Was down there for import vs domestic a couple weeks ago.
What tires and size you running?

SGMM5 · 11-20-2021, 09:07 PM

BTW. You have me sold on getting a flash tune & TCU tune. Prob not gonna be able to hold out more than a few months on that. Def not gonna be able to wait till warranty is up 😂

DrivenAgain · 11-21-2021, 08:49 AM

Quote:

Originally Posted by SGMM5

BTW. You have me sold on getting a flash tune & TCU tune. Prob not gonna be able to hold out more than a few months on that. Def not gonna be able to wait till warranty is up 😂

I'm extremely happy with my tuner.

Quote:

Originally Posted by SGMM5

Nice. Was down there for import vs domestic a couple weeks ago.
What tires and size you running?

Oh cool, I've never been I know it's a blast. I'm running all factory size PS4s

SGMM5 · 11-21-2021, 10:58 AM

Good to know on the tuning. When the time comes I may message you.
I'm running 285 front 295 rear PS4s on the factory 789 wheels and Dinan HAS kit. Don't have any data to compare but I feel like both have helped off the line grip. But once temps are mid 40's or less it doesn't hook.

GTATX · 11-21-2021, 01:39 PM

Quote:

Originally Posted by SGMM5

Good to know on the tuning. When the time comes I may message you.
I'm running 285 front 295 rear PS4s on the factory 789 wheels and Dinan HAS kit. Don't have any data to compare but I feel like both have helped off the line grip. But once temps are mid 40's or less it doesn't hook.

So I have the same tuner and little more aggressive tune and anytime temps under 60 I fail to hook and can't break into 9s lol. I have stopped trying as I know on drag strip I will easily specially most of the guys doing 9s run race gas and me on the other hand have been doing e40 with meth.

SGMM5 · 11-21-2021, 05:29 PM

Quote:

Originally Posted by GTATX

Quote:

Originally Posted by SGMM5

Good to know on the tuning. When the time comes I may message you.
I'm running 285 front 295 rear PS4s on the factory 789 wheels and Dinan HAS kit. Don't have any data to compare but I feel like both have helped off the line grip. But once temps are mid 40's or less it doesn't hook.

So I have the same tuner and little more aggressive tune and anytime temps under 60 I fail to hook and can't break into 9s lol. I have stopped trying as I know on drag strip I will easily specially most of the guys doing 9s run race gas and me on the other hand have been doing e40 with meth.

What's up man! Dont know if you remember but I bought and am still running your stock wheels. Had them powder coated and the car is looking good.

Def interested in your guys tuner. Heard nothing but good things and I appreciate you guys sharing your experience.

DrivenAgain · 11-22-2021, 09:33 AM

I have found the cause for my inconsistent trims. I thought it was low E content but I have an exhaust leak at the downpipe connection. I could smell raw exhaust inside car but not at rear of tailpipe. Seems to be minor but it's enough to cause a loss in boost and make my fuel trims drop. 3lb boost and 7* timing loss. 😬

AngryInch · 11-22-2021, 09:36 AM

I have to check my down pipes too. I feel I could have a leak. Going to do that soon.

onfireX5 · 11-22-2021, 09:44 AM

Quote:

Originally Posted by DrivenAgain

I have found the cause for my inconsistent trims. I thought it was low E content but I have an exhaust leak at the downpipe connection. I could smell raw exhaust inside car but not at rear of tailpipe. Seems to be minor but it's enough to cause a loss in boost and make my fuel trims drop. 3lb boost and 7* timing loss. 😬

Will be very interesting to see the effects of the fix. A major leak will definitely fake out the O2 sensor. So AFR issues for sure. The DME must use cross look up tables for that to effect boost, since a direct target would stay the same.

A lean condition must cross into a safety table that reduces boost and timing…….

DrivenAgain · 11-22-2021, 09:58 AM

Quote:

Originally Posted by onfireX5

Will be very interesting to see the effects of the fix. A major leak will definitely fake out the O2 sensor. So AFR issues for sure. The DME must use cross look up tables for that to effect boost, since a direct target would stay the same.

A lean condition must cross into a safety table that reduces boost and timing…….

thx man, yes looking forward to seeing the after logs. Further digging into the "bad log" I noticed timing drop from 10*-12* in gears 1-2, which is evidenced in my low 60ft time and 1/8 MPH. Going to get leak tightened up, oil changed and plugs are due also. Then I'll be back testing and logging to improve.

bcparker2 · 11-22-2021, 10:03 AM

quick question slightly related to the logging discussion, what is "trim"? I understand it has to deal with fuel delivery but that's not an SAE defined PID so I'm wondering if anyone knows the math behind it. Back when I tuned other cars I used to monitor injector duty cycle and pump duty cycle to make sure there was headroom in the fuel system. Those PIDs don't seem to be available on the M5 or maybe I'm not looking at the right place.

11-15-2021, 01:22 PM	#133
Velon Private First Class 99 Rep 106 Posts Drives: M5 f90 Join Date: Apr 2014 Location: Stockholm iTrader: (0)	This is my best 100-200 on the f90 100% stock hardware, 2018 f90 Swedish 98 octane fuel which isn't anywhere near 98 but it's the best we have apart from e85. Powerlab Sweden/HP Performance ECU/TCU stage 1 Next year I will remove the upper cats and maybe try a e30 map. But I'm very pleased with the car, the TCU map changed the gearchanges to feel like a DCT gearbox (very familiar to my old f80) and driven easy it still feels stock. Ofc there are faster cars here but I wonna keep my rods in my engine for now 🤣 Attached Images
	Appreciate 3 GTATX1105.00 DrivenAgain120.00 Holset274.00 Quote

11-18-2021, 04:01 PM	#137
DrivenAgain MFJWADE 120 Rep 351 Posts Drives: 2018 BMW M5 Join Date: Dec 2020 Location: MD iTrader: (0)	1/4mi track day coming up on Saturday. My tune is dialed in and I'm ready. Attached Images __________________ 2018 M5 Singapore Grey CCBs/Utku Noa E45 ECU/xHP TCU/PG-Intake/PG-Lower Downpipes
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11-20-2021, 06:38 PM	#139
DrivenAgain MFJWADE 120 Rep 351 Posts Drives: 2018 BMW M5 Join Date: Dec 2020 Location: MD iTrader: (0)	Not the results I was expecting, but it's nice to have the data to back it up. Although a personal best on an actual drag strip, I have gone faster. This has happened before where I get a bad or low low batch of Ethanol. My trims were low and average timing was off 5* I am happy with the trap speed. I'm going to go back to focusing on 60-130 and dial my fuel back in. I'll be back!! Attached Images __________________ 2018 M5 Singapore Grey CCBs/Utku Noa E45 ECU/xHP TCU/PG-Intake/PG-Lower Downpipes
	Appreciate 0 Quote

11-20-2021, 09:04 PM	#144
SGMM5 Private First Class 116 Rep 107 Posts Drives: 2020 M5, 2001 Lexus IS300 Join Date: Feb 2021 Location: MD iTrader: (1)	Nice. Was down there for import vs domestic a couple weeks ago. What tires and size you running?
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11-20-2021, 09:07 PM	#145
SGMM5 Private First Class 116 Rep 107 Posts Drives: 2020 M5, 2001 Lexus IS300 Join Date: Feb 2021 Location: MD iTrader: (1)	BTW. You have me sold on getting a flash tune & TCU tune. Prob not gonna be able to hold out more than a few months on that. Def not gonna be able to wait till warranty is up 😂
	Appreciate 1 DrivenAgain120.00 Quote

11-21-2021, 10:58 AM	#147
SGMM5 Private First Class 116 Rep 107 Posts Drives: 2020 M5, 2001 Lexus IS300 Join Date: Feb 2021 Location: MD iTrader: (1)	Good to know on the tuning. When the time comes I may message you. I'm running 285 front 295 rear PS4s on the factory 789 wheels and Dinan HAS kit. Don't have any data to compare but I feel like both have helped off the line grip. But once temps are mid 40's or less it doesn't hook.
	Appreciate 0 Quote

11-22-2021, 09:33 AM	#150
DrivenAgain MFJWADE 120 Rep 351 Posts Drives: 2018 BMW M5 Join Date: Dec 2020 Location: MD iTrader: (0)	I have found the cause for my inconsistent trims. I thought it was low E content but I have an exhaust leak at the downpipe connection. I could smell raw exhaust inside car but not at rear of tailpipe. Seems to be minor but it's enough to cause a loss in boost and make my fuel trims drop. 3lb boost and 7* timing loss. 😬 Attached Images __________________ 2018 M5 Singapore Grey CCBs/Utku Noa E45 ECU/xHP TCU/PG-Intake/PG-Lower Downpipes
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11-22-2021, 09:36 AM	#151
AngryInch Lieutenant 213 Rep 548 Posts Drives: 2021 BMW M5 Comp Join Date: Jul 2021 Location: Canada iTrader: (0)	I have to check my down pipes too. I feel I could have a leak. Going to do that soon.
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11-22-2021, 10:03 AM	#154
bcparker2 Private First Class 105 Rep 142 Posts Drives: BMW M5 (F90) Join Date: Oct 2020 Location: Texas iTrader: (0)	quick question slightly related to the logging discussion, what is "trim"? I understand it has to deal with fuel delivery but that's not an SAE defined PID so I'm wondering if anyone knows the math behind it. Back when I tuned other cars I used to monitor injector duty cycle and pump duty cycle to make sure there was headroom in the fuel system. Those PIDs don't seem to be available on the M5 or maybe I'm not looking at the right place.
	Appreciate 0 Quote