Another HP Tuner Question
Yes, that's correct.
Our TCU takes a lot of the enjoyment out of the experience.
I'm fortunate to be able to experience the feel of the launch from the likes of a 991 911 Turbo S and a 2016 Huracan 610-4. Believe it or not, but my car from a roll is as fast as all of them with many side by side comparisons to show for it.
At the track, my car has the slowest ET out of all the cars, but with one of the fastest traps.
Of all of them, the Porsche Turbo S felt the fastest by a country mile due to the 1.6 60ft and sustained "push" I got from the PDK. I honestly thought I ran a 9 second pass from how the car felt... I ended up running a 10.6 at 124mph in the 911, 5 mph slower than my car. The Huracan was consistently 10.7 at 130 mph while I was consistently a 11.0 at 129 mph in the quarter.
Where am I going with this? Adding larger turbos isn't going to do anything for us unless we have a modded TCU and transmission to take advantage of it. Look to GAD for that level of modification. Locally, I have a friend who showed 800awhp from his Pure Turbo upgrades on his 2014 E63S, heck it's his dyno they tout on their website. What did he run after all was said and done? 10.9 at 127 mph. Hardly seems worth the ~20K investment in parts does it, when after all was said an done, he trapped 2 mph slower than my tuned but stock hardware car?
Personally, my next upgrade is the TCU tune... that has to happen before anything else IMO. We have the power down low, we just have a non-cooperating TCU currently ...

I'm hoping a TCU tune allows me to experience that hole shot feeling i get from the 911 Turbo S. If so, it will be money well spent if I can keep my transmission together..
Last edited by brutus_tx; Apr 16, 2020 at 02:12 PM. Reason: typo
Haha! My little GTI puts down 504whp/450wtq and weighs 3k lbs. That car makes my E63S feel sluggish. I will leave my E63S stock though.
I can't do much with the TCU but that will change hopefully soon, but the midrange and upper power band has been immensely improved with the EC flex fuel tune.
Like you, my other cars are tuned VW's, so I have a good grasp of the "feel" of those cars when heavily tuned.
My weekend warrior is a 2004 R32 Twin Turbo SEMA build from HPA called SKELA... 640 bhp and 650 tq with DSG and AWD gives me a good performance metric to compare against.
Pics for clix..
I can't do much with the TCU but that will change hopefully soon, but the midrange and upper power band has been immensely improved with the EC flex fuel tune.
Like you, my other cars are tuned VW's, so I have a good grasp of the "feel" of those cars when heavily tuned.
My weekend warrior is a 2004 R32 Twin Turbo SEMA build from HPA called SKELA... 640 bhp and 650 tq with DSG and AWD gives me a good performance metric to compare against.
Pics for clix..
The Best of Mercedes & AMG

I'm hoping a TCU tune allows me to experience that hole shot feeling i get from the 911 Turbo S. If so, it will be money well spent if I can keep my transmission together..

Beyond Renntech, there are a couple of avenues to TCU tune access that have opened up recently here in North America.
I will be running one of them I'm sure in the next few months.
TCU has rev limiter as well, so you can raise it if you want when tuning.
This will probably be my next mod after I install my Pierberg CWA100 and divorce my cooling systems...That should get me knocking on the door of a 10 second pass in my 550.











