Built engine + WMI + GTX3071, ~476WHP @31-32PSI
2008 Icy Blue Mazda CX7
Stock engine and exhaust (YES!!), JBR3" + GTX2867 gen2 + Autotech HPFP, self-tuned to 320-ish BHP
I compared data from this beta tune and 175 tune, using virtual dyno, and with new tune I get around 210HP (crank) and 480Nm, and you definitely feel it.
But during one uphill overtake, in 3rd gear, full throttle, I experienced power cutoff. Unfortunately I don't have log for this, only relevant information is that outside temperature was 10C.
I found this old post on other forum, it looks like other tuners were aware of this problem even in 2015. It's possible that this problem can't be solved just with tuning, hardware upgrades are required.
https://www.mazda3revolution.com/thread ... st-1460169
So for now, I'm going back to 175 tune, for reliability reasons.
I would like to see new tune with a bit smaller power levels, about 200HP and 450Nm and stock EGT limits. With this beta tune I was getting EGT temps above 840C, while stock limit should be 790C.
Maybe stock intercooler can handle these smaller limits.
I've tried 1.06 also, but improvement over 175 wasn't very noticeable, as it's with beta tune, so I went back to 175.
I found this video, where they had same EGT problem as does beta tune. I understand there are no diesel vehicles in US, so it's hard to do anything, but aren't there any VersaTune's partners that have access to the diesel car and that could create tune?