I am glad that anm6 found a tune that would work for his higher flowing reworked K04. HT tune would not handle that much more flow.
Anm6, those are fabulous numbers on a Mustang dyno. I don't think anyone can get a stock K04 anywhere near that on any tune without blowing up!
But I must respectfully disagree that the stock K04 falls flat at 5k rpm. With the HT tune (Excel map) and mods below, I am producing good power out to at least 6,200 rpm before any significant fall off. Attached is a G-Tech accelerometer data log on power produced in a fourth gear pull.
BTW: On the Gen 1 MS3, gearing is 16.0 mph per 1,000 rpm, according to Mazda specs, so do the math. This is an almost flat power curve from about 4,000 rpm to where I let off at 6,200 rpm. The two runs were made back to back on the same road in opposite directions to account for any uneven or unlevel surface (it is almost ruler flat) and any variations in wind.
I am also attaching a link to the power loss through drag calculator. Because the car is not stationary, G-Tech uses real world conditions out on the road and the engine must push the car through the aerodyamic drag of the air, you have to allow for frontal area and drag coefficient. Frontal area on our cars is 25.5 square feet, and drag coefficient is .32, both according to Mazda's specs.
This means that the "dyno" numbers on the chart are deflated by about 12 horsepower at 60 mph and a whopping 50 horsepower at the point where I ended the run. But seriously, as with a chassis dyno, the numbers are really just calculations. In this case they come from the accelerometer's measurement of g forces. So you can't take them as absolutes, but rather as relative numbers. The point is that the stock K04 can be safely tuned with HT to produce a good, flat power curve out beyond 6,000 rpm.
When taking into account the considerable increasing effect of drag, this tune is still building more power above 5,000 rpm. For hp to remain essentially flat at is peak as the effect of drag increased with speed was a huge and nice surprise.
Not to jack the thread, just wanting to point out that good and safe tunes can extend the power curve on the stock turbo too.
http://gtechprosupport.com/support/AeroDragCalc.htm