[Se7endust1]

I searched far and wide and didn't find much on VF Engineering/Hex Tuning for our F22s. They seemed to be conservative of sorts after reading some posts on the M3..or maybe it was M5. It seemed reasonable, and I have zero plans of going any further with it so needing to make adjustments isn't necessary. I have a drop in air filter and axle back Remus on the baseline. Anyway, here are the results in the attachment. It doesn't even feel remotely like the same vehicle...

[Dinoman]

That is a fair amount of torque increase there! Mods? You said filter and axle back in baseline but what else is different between runs other than tune?

[Se7endust1]

The tune is the only difference between the dyno numbers. I've got some pretty light wheels, but that won't really show on this lol

[Dinoman]

That's pretty impressive for a filter, exhaust and a tune.

[Se7endust1]

I'm not sure what to compare it to with the other tuning platforms...no one ever posts their dynos!

[Dynamic_m235]

Honestly never heard of this tune but the torque jump is absolutely crazy to me, must be awesome!

[designatedposter]

125 ft lb increase?! 8at or 6mt?

[SoCalMdriver]

Is that’s stage 1 or stage 2 tune?

[bryan_G01]

I believe it. Look at my profile for my dyno

[beMtroubleYou]

Congrats on fine numbers!

Are both runs on same fuel or is there an E85 mixture in play?

[Se7endust1]

Both runs on 91 octane from the shell down the street.

It's the 8at on their stage 2 version.

I've mastered the technique to getting some nice exhaust burbles 😁

[SoCalMdriver]

Originally Posted by Se7endust1

Both runs on 91 octane from the shell down the street.

It's the 8at on their stage 2 version.

I've mastered the technique to getting some nice exhaust burbles 😁

How is the drivability with such a drastic torque increase? Any reliability issues?

And this is a flash tune correct?

I’m really interested considering this is on 91 OCT

[Azn Ninja]

So much low end torque, looks really good but I wonder how it would be for RWD? i could imagine alot of wheel spin. hopefully it can make use of all that torque

[Se7endust1]

If you had sticky 265s on the RWD, it would probably be ok. I've caught my 265s spinning, but I also chose to go with a tire known for not being sticky. Lol...no issues yet, but it's a ton of fun.

Yes, flash via ODB II/laptop/software.

[Se7endust1]

Still going strong 4k miles later...I put a few car lengths on a brand new S4 a while back from an 80 mph pull. I was fairly surprised with that one, but also didn't know what to expect out of it!

[XutvJet]

The mile-high Denver altitude would explain the super high 1.23-1.25 correction factor on the Dyno. Thing is, turbos aren't remotely as affected by altitude as naturally aspirated cars are because turbos will increase boost compensate for the lack of oxygen. Turbos are more laggy at altitude, but power isn't remotely as affected thus, I think the correction factor used is skewing the data a bit. On a Dynojet and with a more common 1 to 1.05 correction factor, a M235x 8AT typically see around ~290whp and ~310wtq. The RWD 8AT around ~300whp/320wtq and the 6MT ~310whp/330wtq.
322whp/350wtq on a Dynojet with a stock M235x is not accurate. At sea level and with a more typical correction factor and the current mods, I imagine this particular car would be making ~340whp/390wtq.

Lastly, the big torque spike is simply the turbo overboosting due to a high load situation (i.e. tall gear + low rpm + full throttle = turbo overboost) and altitude. In a race, this overboost would not be experienced in 1st gear as not a lot of boost is made (minimal load due to a lot of torque multiplication at the tranny) and every successive gear change is well beyond 4,000rpms.

[Se7endust1]

I suppose we'll never know unless the next owner gets it dyno'd at sea level...either way, I feel it was a worthwhile purchase which is all I was worried about.