Originally Posted by Bryanw92
So my question is why couldn't Justin tune your car? Did you have too many mods in it for their method to work? Were you asking for a radical tune that was right on the cutting edge of what your engine could produce?
It was the VMP GenII Stage 2 kit. 82mm pulley, 47lb injectors. Standard fanfare. The only other mods I had was a Roush CIA, Magnaflow Competition Catback, and a tune from MidAtlantic performance.
Even if you wish to consider that Mike Roush's tune from MAP *could* have caused an issue with VMPs tune, I couldn't get enough data at first.
As soon as I hit 4500 RPM the would be a sudden loss of power and the knock, dude the knock, was terrible. So much so, that I stopped the second pull and sent my data to VMP. I am not blowing up my engine. It wasn't enough for Justin to diagnose. I had no choice but to find a local shop to tune and diagnose. The local shop here initially worked with VMP to retune it and there was always a l continued to use a dyno to data log under safer and a more controlled environment. There were suggestions to try: gapping the plugs smaller, boost a pump, throttle body position. Nothing solved the problem.
After 9 months of researching forums, talking to other local guys, spending over $1200 for 1) a initial re-tune (I had pay the local shop for dyno time and tune even though they talked to VMP, its still the local shop's time and effort) and 2) dyno pulls for data logs...I said screw it. I found a local tuner with experience with Mustangs. At the end of the day? Bad catalytic converters. A tip on this forum helped point me in that direction too. I went from ~475 RWHP to 600 RWHP peak after Kooks long tubes and offroad x-pipe. I ended up spending $3500 more than what I expected.
Now, I don't blame VMP. Things happen. Every car is different. Cars age. Another guy who had the '13 GT had to upgrade to ID1000s because the 47lbers didn't work for him. Yet it is still a 5.0 with VMPs GenII Stage 2 kit. Because racecar, I guess. I had to cut my losses and find someone local, and thank god I did. I was frustrated with 9 months of headaches and the additional money I spent.
If I lived in Florida
, you bet your bottom dollar I would have driven to VMP directly. I am willing to bet Justin would have had an easier time diagnosing with my car in hand. And that is the crux of my criticism of email tunes.
And honestly, from my line of work I know EXACTLY the problems with diagnosing remotely. It gets to the point that I ask my customers to send me their design or I ask my boss to fly me to the customer's site. There is only so much you can do over phone and email.