50-75 in 2.9 sec in third gear...GPS and Racechrono
MS3 with Hypertech tune, sri and CS racepipe...standard car takes 4.2...
Will test the higher speeds later on...
Not sure how much faster my car really is now after the tune, it revs longer and looses traction easier, but if it is any faster, I don't know...The car is different, more eager and pushing harder, but not really that much faster...
The biggest performance improvement on my car was changing the air filter, it made the car 1 sec faster 50-75 mph...
Nice numbers, Peak65. Objective data is always better than seat of the pants feeling. Testing for only a 25 mph differential makes it hard to measure improvements accurately, though. It is, indeed, much better that stock, which according to published data would be about 3.7 seconds (Road and Track), rather than 4.2 you suggested. But you do have a serious power gain. It would have been helpful had you indicated how much your intake and rp dropped your times before the tune, so we could see what the tune added.
Well, I asked my question of anm6 for numbers so some real world comparisons could be made. It would appear that I'm already about two tenths quicker, 50-75
on stock tune with just an intake and dp/rp. And that was with a shift into fourth at 72-73 mph. If I'd ridden it out past my chosen shift point (5,500-5,700 rpm), I'd have been a tenth quicker. I set the shift point light at 6K, but did not want to see the light flash except during the flat shift. My stopwatch and G-Tech Pro RR accelerometer are within a tenth. Chart attached. Ambient temp was 65 degrees. Unless the Hypertech tune adds more power once the car is under full load in the higher gears, the two tenths differential is going to grow as the run continues to higher speeds.
This chart was last spring, a year ago today. It's warmed up enough now that I laid down another run this a.m. that looks pretty similar, (quarter mile in the 13.4's again) but I haven't downloaded it yet to compare. The graph generating software can overlay the charts on top of each other for comparison.
When modding this car the owner does need to know what the car is actually doing in time, speed and distance measurements to know where you are headed with the mods.
Longer runs, like 60-100 or 60-110 or higher tell the story even more accurately. Or try a 40-120 roll and tell us what you get on the stop watch or accelerometer. Testing over that span is an excellent test.
And no, I'm not kidding, anm6, it's very realistic to invest in some type of time, speed, distance calculator, even a simple cheap stopwatch if you are going to spend many hundreds of bucks on mods and not know where those mods are taking you in terms of real performance.
Drag strip timer is even better, but it's inconvenient and you can usually only get in maybe three runs in an evening.
It looks like your tune is getting you some significant power gain. You may do even better "up top" when you get well into fourth and fifth gears at WOT. Add a downpipe, if the tune will allow safe AFR's, and it will just come alive.
I would just modestly suggest that while the tune is building power, your improvement in acceleration may be mostly due to your intake and exhaust mods. The tune probably helped but maybe not as much as some might think.