well, it's taken us a very long time to actually get round to posting this! For those of you who follow what happens on the E39 section, we've been very busy over there working on NA tuned S62's. Taken a little longer than expected but the end result is quite satisfactory.
This is more of an introduction in this section about us and what we have been upto.
This software has been under going development for a lomg time with lots of breaks due to the above mentioned reasons.
Here it is and let us know what you think:
M5 on our dyno:
This are just the premlimary graphs, we will put up a few more showing the consistency kept on the correction factors between the tests.
Car was tested with 99 Octane (UK) Shell V Power before and after.
Just something we'd like to point out about the results is the actual runs chosen. When any car is run intially the first few dyno pulls are usually very low. This is for various reasons such as tyre temperature, transmission oil temperature etc etc. We have chosen the very highest figures the car made as standard.
The after tuning graph chosen is the one that shows the most consistent power. We did have a few runs which were higher but they are not an accurate representation as those figures were not consistent.
So what you see above is the highest pre tune figure vs the average after tune figure.
It is too easy to show the lowest vs the highest and this would give us a gain of almost 45 HP..... but this is completely unrealistic and is therefore not shown.
If anyone is interested in seeing those graphs we can post them up.
In addition to this all tests were done whilst monitoring air intake (both banks), oil, coolant and exhaust gas temperatures. For us to get an accurate representation of a true before and after figure it was important that we kept these variables as close of physically possible. This we managed to keep very consistent with intake temperatures always always between +5-10 degC above ambient temperature which inside the workshop was very consistent given it's quite cold here.
Last thing, yes the engine is revving to 8800rpm! We will be lowering that down to around 8400-8500rpm as there is little point in revving past this.
Hope you guys think the result is good and the information posted above is useful.
Let us know what you think!