I will first like to start off I have no relationship other than customer to any of these companies I had no sponsorship this will be done on my dime. I will state personal experience with both tunes. I am by no means a tuner are race car driver, just an everyday guy looking to see what I can do next on my car. I we also try to get the GIAC tune to compare to both Dinan and Cobb.
First some info:
Car - 07 335i e92, car has 49,5XX miles and the Turbos were Warranty replaced 4,000 miles ago, 3rd HPFP, 2 injectors and just got the oil filter housing gaskets replaced 4 days ago.
Upgrades - Dinan CAI, Forge DV, BMW Performance Exhaust.
Reason for upgrading: The Car is out of the 4 year 50,000 warranty but I do have a CPO warranty up to 100,000. The car has been Dinan tuned for about 3 years now. NEVER had a problem. I want to add more power to the car. since my free service is done and I will be taking it to an independent shop for maintenance I have decided to add a couple of things to make the car even better.
Cobb installation was a nightmare for the first go around, I posted this already on another thread so I'm just going to copy it here.
Quote:
Originally Posted by jzepeda
Got the Cobb AP yesterday and after about an hour of cursing and bitching I finally got it to work. Just a side note when doing the install I highly recommend doing it during the week during Cobb business hours. in case you run into a problem, I on the other hand installed it on a Friday night and I was about to leave my car at local shop because I couldn't get it to work and no tech support until Monday...
I'm putting together some Dyno sheets as well as my experience with installation and the tune comparison between my Dinan stg 2 vs Cobb AP. just wanted to put some of what happen on here.
I was also running a Dinan Stage 2 flash prior to install. my guess this is why I was having issues.
once updated I plugged the Cobb into the car, it start dumping my rom but of course failed. I was aware of this since I talked to Cobb before hand, so moving on. After the error I tried to flash the tune. after about 2% it stopped. it went into a recovery mode. followed the display prompts and started it again. again after 2% failed Communication error. ok shut everything off and tried again and again and again.... at this point the car will not start of course. oh I forgot to mention once it started the flash the car was acting weird. the wipers were going off and my car kept beeping (Door tone sound). i walked away from the car cursing. cooled down, took the Cobb to my computer and double checked it was updated. everything came back ok. I tried once again. after the 3rd time the Cobb started the recovery process it got to about 90% and failed. started again right after and it finally completed. once this was resolved I flash 91 map took about 8min and the car was ready. took it out for a drive and gave it about a good 15 mile run before pulling on it. felt nice, first thought was power feels very similar to Dinan stg 2 but picks up better and holds longer and the dyno pretty much shows it. I will create a thread with all the info.
Thanks,
Jorge
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EDIT**** Adding in a video of my attempt to uninstall
now for the results:
Due to some issues I did not get the boost read outs for Dinan sorry.
Run 4 is the Dinan and Run 10 is the Cobb. I will post a better Dyno pic once I figure out how to use the software.
power number are:
Dinan Stg 2 - 305 hp 321 tq
Cobb Stg 1 - 319 hp 323 tq
As you can see Cobb holds boost pretty well throughout the power band and is pushing about 50 hp/tq more around 6500 rpm.
Dinan very smooth tune but really conservative and pulls back boost quickly. The Dinan tune is great very smooth power and for Daily driving was perfect. Cobb tune is a bit more aggressive nothing crazy but you notice right away. boost comes on strong and holds very well through the power band. I was not thrilled about the throttle sensitivity but as I read and other people have commented it can be tuned out. it's only been a couple of days so i'll let you know in a few day how the Cobb acts in my daily commute.