Originally Posted by ///Bruce

From knowing Steve Dinan, he began racing for BMW back in the day and started messing with tuning suspensions originally. That was his original bread-and-butter. Over time he started tinkering with tuning. And, over the decades, he got brand recognition to the point where Dinan is the only aftermarket tuner out there who will mimic the same warranty period as BMW and now MB. And both BMW and MB have no issues with installing his products on your ride for you. I know of no one, generally speaking who will do this for Renntech, Weistec, Eurocharged or anyone else.

It's a 'safe' mod...

Originally Posted by DRGG

OK. Are there any Dinan owners out there who can testify that their piggybacks are "laggy, inconsistent crap"?

I actually have not read a single report of dissatisfaction in this forum (although I have probably missed one or two).

Originally Posted by TexasEd

I had a Dinan on my BMW M4 before removing it and going with the Bootmod3 flash tune. While I had no issues with the Dinan, the performance was laggy when compared to the flash tune. ECU tunes are always better than piggybacks simply because they operate in two different methodologies. The piggyback produces power by fooling the DME into believing it is making less power than it actually is. The issues with this method is that the engine timing, AFR, air/fuel, etc. remain in the stock boost while the engine is actually making more torque. The ECU tune correctly tunes all parameters making power the correct way. My C63s has a Renntech tune which is outstanding. I previously had Eurocharged which was crap.