[bolrmakr73]

I could not wait until tomorrows better weather to make a run. So, in the interest of transparency here is todays run. I am new to not only dragy, but what certain speeds and times can say about a run. I am hoping someone can help me understand this slip a little better. First, I understand that this 1/4 ET is about what it should run stock, and certainly not impressive for a tuned M5 competition. However, before I call Noelle and complain; my 0-60 times are worse than stock, but my trap speeds seem to suggest I should have much better ETs than I do. It has been a bit cool out, and the roads were not completely dry, but I cannot be sure if I had wheel spin. It seems to bog down at first, then engage a second later. Again, I don't want to jump the gun and start complaining to Noelle without maximizing my results and having genuine data to report. Any thoughts or interpretation help would be greatly appreciated.

[bolrmakr73]

I guess I should have mentioned that I am not using LC. I haven't even had the car long enough to figure out how it works.

[pbonsalb]

That is about 3 mph trap speed better than any stock car.

[ResIpsaLoquitur]

Originally Posted by pbonsalb

That is about 3 mph trap speed better than any stock car.

Wow, I'd be furious for all that to result in that minimal gain!

[UglyBuzzard]

Don't answer if you are not comfortable but curious, what did this cost you?

[pbonsalb]

Originally Posted by ResIpsaLoquitur

Wow, I'd be furious for all that to result in that minimal gain!

3mph better than the best any stock M5 would do. Some trap 125-126, some a little better. We have no before numbers from this car so we don’t know what the tune added. 3mph is the minimum.

[ResIpsaLoquitur]

Originally Posted by pbonsalb

3mph better than the best any stock M5 would do. Some trap 125-126, some a little better. We have no before numbers from this car so we don’t know what the tune added. 3mph is the minimum.

Thanks for the clarification!

[bolrmakr73]

3k. While I’m certainly upset about the ETs, I guess I’m still curious as to what I need to improve in my launch and take off to get a true idea of what the tune has done compared to average stock (since I don’t have pre tune runs). I may still be irritated after all of it, but clearly this run suggests something is off with my launch.

I guess a better way to say it is if my 0-60 time improves to just average stock, my ET looks more acceptable. Which my trap speed suggests I should be running, correct?

BTW, I appreciate the responses and help!!

[pbonsalb]

ET is dependent on launch. You can work on that. There is a trans tune that some say helps, particularly if your car will no longer engage launch control (some say it is limited to 100 engagements).

[onfireX5]

Originally Posted by bolrmakr73

3k. While I’m certainly upset about the ETs, I guess I’m still curious as to what I need to improve in my launch and take off to get a true idea of what the tune has done compared to average stock (since I don’t have pre tune runs). I may still be irritated after all of it, but clearly this run suggests something is off with my launch.

I guess a better way to say it is if my 0-60 time improves to just average stock, my ET looks more acceptable. Which my trap speed suggests I should be running, correct?

BTW, I appreciate the responses and help!!

To eliminate the launch from the equation, pull the 60 to 130 mph metric from that 1/4 mile pass from Dragy and post it. That will be another indicator of power.

[bolrmakr73]

Originally Posted by onfireX5

To eliminate the launch from the equation, pull the 60 to 130 mph metric from that 1/4 mile pass from Dragy and post it. That will be another indicator of power.

[Sophisticated Redneck]

What fuel are you using? I would be curious to see what difference you would see with a 95-96aki rating. Do you have access to E85 or race gas you can mix in?

[onfireX5]

Originally Posted by bolrmakr73

Attachment 2994534

Not bad , actually.

[pbonsalb]

I agree. I think 7.34 60-130 is good for a stock M5 with just a tune and running 93 pump gas.

[bolrmakr73]

You have to forgive my ignorance, but I did not know we could mix in E85 safely without a specific tune for it. My knowledge is not exactly vast on the subject (lol). I am using 93 from my local stations. I was told from my Trackhawk tuner that in my area, once October hits, the winter blend of ethanol is crap. There is a Sunoco about 15 miles away that has race gas I could try. While I definitely want my times better, my ultimate goal is to see what this tune did (or did not do) compared to stock since I do not have pre-tune dragy runs. I've tried launching every way I can imagine (except for using LC, which is next this afternoon), and I just spin. Just some background info, I bought the car (2019 M5 comp) 6 weeks ago with 2600 miles (not a typo). So while the tires only have 4k miles now, they are quite a bit old. I know this is not helping my launch. Should my 60-130 time be better than that? I thought stock was in the 8.2 neighborhood?

Again, I appreciate the help!!

[bolrmakr73]

Originally Posted by pbonsalb

I agree. I think 7.34 60-130 is good for a stock M5 with just a tune and running 93 pump gas.

I appreciate the response. I certainly do not believe the wild 850HP claims from Noelle, but I'm trying to determine if it did anything at all after reading some earlier threads from here on Noelle.

[bolrmakr73]

Finally sunny out.....

[pbonsalb]

You are getting faster! Time for some more mods to get into the 6s.

[Sophisticated Redneck]

Originally Posted by bolrmakr73

You have to forgive my ignorance, but I did not know we could mix in E85 safely without a specific tune for it. My knowledge is not exactly vast on the subject (lol). I am using 93 from my local stations. I was told from my Trackhawk tuner that in my area, once October hits, the winter blend of ethanol is crap. There is a Sunoco about 15 miles away that has race gas I could try. While I definitely want my times better, my ultimate goal is to see what this tune did (or did not do) compared to stock since I do not have pre-tune dragy runs. I've tried launching every way I can imagine (except for using LC, which is next this afternoon), and I just spin. Just some background info, I bought the car (2019 M5 comp) 6 weeks ago with 2600 miles (not a typo). So while the tires only have 4k miles now, they are quite a bit old. I know this is not helping my launch. Should my 60-130 time be better than that? I thought stock was in the 8.2 neighborhood?

Again, I appreciate the help!!

Not a problem happy to help and yes mixing in E85 is no problem on any modern BMW platform, even on my 10 year old E70 I mix in 5-6 gallons per 20 gallon fillup for an effective 94-95aki rating.

How much E85 you can mix in without triggering an check engine light is the question and this is different for each platform. Once you max out your fuel trims, you will start to run lean and the DME will trigger a check engine light with codes usually indicating an issue with mixture control. You have to start off on the lower end and watch your fuel trims, air/fuel ratio and go from there.

However you indicated you have access to race gas so I would just toss in a 50/50 mix of 100 unleaded race gas and 91gas for an effective 95-96aki rating and see if your times improve. If it does improve, you can add in more race gas and see if there is any more improvement and find the sweet spot for your tune/engine. Even if your times don't improve, I would still recommend tossing in a few gallons of race or good E85 with each fill-up. It adds buffer to protect against knock/super knock on tuned engines. IMHO all tuned engines should be running at least 93+aki,

[bolrmakr73]

Originally Posted by Sophisticated Redneck

Not a problem happy to help and yes mixing in E85 is no problem on any modern BMW platform, even on my 10 year old E70 I mix in 5-6 gallons per 20 gallon fillup for an effective 94-95aki rating.

How much E85 you can mix in without triggering an check engine light is the question and this is different for each platform. Once you max out your fuel trims, you will start to run lean and the DME will trigger a check engine light with codes usually indicating an issue with mixture control. You have to start off on the lower end and watch your fuel trims, air/fuel ratio and go from there.

However you indicated you have access to race gas so I would just toss in a 50/50 mix of 100 unleaded race gas and 91gas for an effective 95-96aki rating and see if your times improve. If it does improve, you can add in more race gas and see if there is any more improvement and find the sweet spot for your tune/engine. Even if your times don't improve, I would still recommend tossing in a few gallons of race or good E85 with each fill-up. It adds buffer to protect against knock/super knock on tuned engines. IMHO all tuned engines should be running at least 93+aki,

Thanks for all the info. I will start trying that tomorrow.

[bolrmakr73]

Originally Posted by pbonsalb

You are getting faster! Time for some more mods to get into the 6s.

It's like an itch you can never quite fully scratch......

[ResIpsaLoquitur]

Originally Posted by Sophisticated Redneck

Not a problem happy to help and yes mixing in E85 is no problem on any modern BMW platform, even on my 10 year old E70 I mix in 5-6 gallons per 20 gallon fillup for an effective 94-95aki rating.

How much E85 you can mix in without triggering an check engine light is the question and this is different for each platform. Once you max out your fuel trims, you will start to run lean and the DME will trigger a check engine light with codes usually indicating an issue with mixture control. You have to start off on the lower end and watch your fuel trims, air/fuel ratio and go from there.

However you indicated you have access to race gas so I would just toss in a 50/50 mix of 100 unleaded race gas and 91gas for an effective 95-96aki rating and see if your times improve. If it does improve, you can add in more race gas and see if there is any more improvement and find the sweet spot for your tune/engine. Even if your times don't improve, I would still recommend tossing in a few gallons of race or good E85 with each fill-up. It adds buffer to protect against knock/super knock on tuned engines. IMHO all tuned engines should be running at least 93+aki,

Always learn something from you. Thank you!