So for those of you who love looking at logs and having quantitative data, this post is for you.
I have logged my car at pretty much every step of the way, including taking logs 100% stock before installing any hardware or tuning, and then subsequent logs after any hardware or software change (and in between hardware and software changes). Not only is this data extremely useful to determine the source/cause of any odd behavior that suddenly shows up (i.e., was it he IC I just installed or was it the change of tune), but it allowed me to create the figures below using Virtual Dyno.
I updated the data in virtual dyno as much as possible, but they don’t have a 2015 335i in the version I downloaded (I could only get the 32 bit version to work which is a little more outdated), so don’t get fixated on the actual numbers, although they should be pretty close to accurate since I input gear ratios, tire size, weight (including my weight), drag coef, etc, into Virtual Dyno. They are also consistent with actual numbers I have seen floating around. They are probably more representative of crank HP rather than wheel HP, but again, the point is not the actual numbers themselves but rather the delta between the different curves with different hardware and software changes.
2015 335i Msport, 8AT, RWD. About 40-44k miles in all logs. OEM plugs, never changed yet. OEM intake (non MP) with AFE pro dry drop in filter in all logs. The mods are noted on the plot. IC+CP are VRSF (5’’ stepped). Fabspeed catted DP. Stock exhaust (non MPE). No other mods besides IC+CP+DP and drop in filter. 19’’ OEM wheels, 255/35/19 rear. Most logs were sea level around 75F ambient, one I think was about 1500’ elevation. Basically always the same road and similar conditions. All logs running CA 91 pump gas, and all tunes are MHD 91 octane (varying stages).
Red line – Completely stock car.
https://datazap.me/u/thejeremyman9/s...&data=3-4-5-19
Blue line – After installing IC+CP (and fixing boost leaks) and flashing MHD Stage 1. I don’t have a good log with just IC+CP install (before the tune) because I had a bunch of boost leaks at the time. Probably not a difference anyways. So the difference between red and blue is IC+CP and stock to stage 1 tune.
https://datazap.me/u/thejeremyman9/f...og=0&data=4-25
Green line – Same as blue line (IC+CP, Stage 1) but with fabspeed catted DP added. This is still on the stage 1 tune so the only difference between the blue line and the green line is the install of the DP. I think this is pretty solid evidence of the benefit the DP adds even without a tune change (although the benefit may be slightly greater here than on a truly stock car since stage 1 is higher boost than stock).
https://datazap.me/u/thejeremyman9/4...og=0&data=4-25
Orange line – All hardware installed (IC+CP+DP), MHD Stage 2+ tune. Note, this is after driving about 70 miles since the switch to stage 2+. As I will describe below, my initial logs right after switching to 2+ had horrible timing, so much so that the car was “slower” (felt and as evidenced below). So this is a “good” Stage 2+ log. A nice jump from the green line due entirely to the tune change from stage 1 to stage 2+.
https://datazap.me/u/thejeremyman9/4...43-44-45-46-47
NOTE: These are some of the “best” logs I have at each stage. Having said that, timing is not perfectly clean in all of them, so there may be some variation based on that.
Overall, I think it shows a pretty nice progression of what you get from each mod and tune change. Due to how I modded my car I don’t necessarily have every combination (such as no log on stage 1 with stock hardware since I installed IC+CP before tuning), but I think it provides some insight into the FAQ of “how much power can I get from XXXX mod?”
BONUS: How much does timing impact power?
Red line – IC+CP+DP, Stage 1. Same as above green line.
Blue Line – IC+CP+DP, Stage 2+. This was right after I changed to stage 2+ from stage 1 log above. This was on the same road on the same day under exactly the same conditions with the same tank of gas as the stage 1 log above. The only difference was the tune change. You can see that the car didn’t really make any more power due to the crazy amount of timing being pulled. I had only drive like 1 mile since the tune change at this point (car was already warm). So, I think the car needed some time to adjust to the new tune.
https://datazap.me/u/thejeremyman9/4...43-44-45-46-47
Green line – Same as orange line above. This is about 70 miles after the blue line on this graph. Exactly the same tune, same hardware, etc. Same tank of gas. The only difference is that timing is much better.
Bottom line? Timing is extremely important in making power, even more so than throwing extra boost.
Anything else you guys want to see?
Any thoughts?
I have logged my car at pretty much every step of the way, including taking logs 100% stock before installing any hardware or tuning, and then subsequent logs after any hardware or software change (and in between hardware and software changes). Not only is this data extremely useful to determine the source/cause of any odd behavior that suddenly shows up (i.e., was it he IC I just installed or was it the change of tune), but it allowed me to create the figures below using Virtual Dyno.
I updated the data in virtual dyno as much as possible, but they don’t have a 2015 335i in the version I downloaded (I could only get the 32 bit version to work which is a little more outdated), so don’t get fixated on the actual numbers, although they should be pretty close to accurate since I input gear ratios, tire size, weight (including my weight), drag coef, etc, into Virtual Dyno. They are also consistent with actual numbers I have seen floating around. They are probably more representative of crank HP rather than wheel HP, but again, the point is not the actual numbers themselves but rather the delta between the different curves with different hardware and software changes.
2015 335i Msport, 8AT, RWD. About 40-44k miles in all logs. OEM plugs, never changed yet. OEM intake (non MP) with AFE pro dry drop in filter in all logs. The mods are noted on the plot. IC+CP are VRSF (5’’ stepped). Fabspeed catted DP. Stock exhaust (non MPE). No other mods besides IC+CP+DP and drop in filter. 19’’ OEM wheels, 255/35/19 rear. Most logs were sea level around 75F ambient, one I think was about 1500’ elevation. Basically always the same road and similar conditions. All logs running CA 91 pump gas, and all tunes are MHD 91 octane (varying stages).
Red line – Completely stock car.
https://datazap.me/u/thejeremyman9/s...&data=3-4-5-19
Blue line – After installing IC+CP (and fixing boost leaks) and flashing MHD Stage 1. I don’t have a good log with just IC+CP install (before the tune) because I had a bunch of boost leaks at the time. Probably not a difference anyways. So the difference between red and blue is IC+CP and stock to stage 1 tune.
https://datazap.me/u/thejeremyman9/f...og=0&data=4-25
Green line – Same as blue line (IC+CP, Stage 1) but with fabspeed catted DP added. This is still on the stage 1 tune so the only difference between the blue line and the green line is the install of the DP. I think this is pretty solid evidence of the benefit the DP adds even without a tune change (although the benefit may be slightly greater here than on a truly stock car since stage 1 is higher boost than stock).
https://datazap.me/u/thejeremyman9/4...og=0&data=4-25
Orange line – All hardware installed (IC+CP+DP), MHD Stage 2+ tune. Note, this is after driving about 70 miles since the switch to stage 2+. As I will describe below, my initial logs right after switching to 2+ had horrible timing, so much so that the car was “slower” (felt and as evidenced below). So this is a “good” Stage 2+ log. A nice jump from the green line due entirely to the tune change from stage 1 to stage 2+.
https://datazap.me/u/thejeremyman9/4...43-44-45-46-47
NOTE: These are some of the “best” logs I have at each stage. Having said that, timing is not perfectly clean in all of them, so there may be some variation based on that.
Overall, I think it shows a pretty nice progression of what you get from each mod and tune change. Due to how I modded my car I don’t necessarily have every combination (such as no log on stage 1 with stock hardware since I installed IC+CP before tuning), but I think it provides some insight into the FAQ of “how much power can I get from XXXX mod?”
BONUS: How much does timing impact power?
Red line – IC+CP+DP, Stage 1. Same as above green line.
Blue Line – IC+CP+DP, Stage 2+. This was right after I changed to stage 2+ from stage 1 log above. This was on the same road on the same day under exactly the same conditions with the same tank of gas as the stage 1 log above. The only difference was the tune change. You can see that the car didn’t really make any more power due to the crazy amount of timing being pulled. I had only drive like 1 mile since the tune change at this point (car was already warm). So, I think the car needed some time to adjust to the new tune.
https://datazap.me/u/thejeremyman9/4...43-44-45-46-47
Green line – Same as orange line above. This is about 70 miles after the blue line on this graph. Exactly the same tune, same hardware, etc. Same tank of gas. The only difference is that timing is much better.
Bottom line? Timing is extremely important in making power, even more so than throwing extra boost.
Anything else you guys want to see?
Any thoughts?
