Made a trip to Cali to swap my JB4 for VF Hex tune

[hemi to e90]

slightly noob on this, but the burbles offer nothing in terms of performance right? purely aesthetic ?

[FSociety]

Originally Posted by MThree_driver

When you're blowing that much boost, that's what happens since the stock turbos are quite small. Upgrading them will shift that power curve much higher! That's why you hear people saying to shift into next year at 6k rpm, to stay in that powerband

Check out the dynos from pure to see how much of a difference it makes!

+1
But also I've seen the piggyback Dyno fall faster than a Flash tune dyno.

[BMW M4 PWR]

A flash can actually manipulate and shift the curve up top better by changing the very factory tuning parameters a piggyback can only response to. That's why. Albeit the JB4 is good at what it's designed for...

[FC4]

Originally Posted by S2evo1

The last dyno looks like shit! 560whp befor 5krpm!.? and falling like a rock after that. The S55 Engine should make max power a lot higher then that.

I remember the first time I saw a modified S55's dyno, too.

[aajjcc]

...

[4everkidd]

Originally Posted by aajjcc

150 miles and my experience so far.

-when I push down the accelerator slightly, there is a small delay, like the transmission was put into neutral for a second before the car starts moving. this is very apparent in stop n go traffic.

-a few times today there was this odd sound in my exhaust which sounded like a high pitched rattle. it happened while I was cruising in 3rd and 4th in sport at around 4k RPM for several seconds. this was remedied by downshifting or upshifting.

-When im in 1st, going to 1-3k rpm slowly (efficient/manual mode) the car will slightly jerk a few times, even when im giving it consistent gas

Sounds like there is still some work to be done on the transmission correlation.

Should be perfect by the time its Flash available

[VF-Engineering]

Originally Posted by 4everkidd

Sounds like there is still some work to be done on the transmission correlation.

Should be perfect by the time its Flash available

It's definitely not a "transmission correlation" issue.

It does take some time for the TCU to adapt to the significant increase in torque throughout different driving conditions and usage.

There are ways to "force" or speed up the adaptation, which can be accomplished by having the transmission adaptations reset at the dealer, or with our DCT/TCU flash (which also resets the adaptation).

[yellowssm]

I don't have any issues like that. Feels just like it did when it was stock. The M4 stock never felt Audi DSG smooth in the first place.

[VF-Engineering]

Originally Posted by yellowssm

I don't have any issues like that. Feels just like it did when it was stock. The M4 stock never felt Audi DSG smooth in the first place.

That's not uncommon either as total mileage and driving style makes a huge difference.

Some people notice subtle changes more than others; for others there's a "placebo" effect because they are paying significantly more attention after the tune that before; and in your case you may have just driven straight through it.

If I recall correctly, you did some city driving after your left Supreme Power, and then you did a 350 mile drive back to Las Vegas.

[yellowssm]

Originally Posted by VF-Engineering

That's not uncommon either as total mileage and driving style makes a huge difference.

Some people notice subtle changes more than others; for others there's a "placebo" effect because they are paying significantly more attention after the tune that before; and in your case you may have just driven straight through it.

If I recall correctly, you did some city driving after your left Supreme Power, and then you did a 350 mile drive back to Las Vegas.

Yup and no problems. Now I just need to get back to the drag strip and see how it does compares to the jb4

[aajjcc]

Originally Posted by VF-Engineering

It's definitely not a "transmission correlation" issue.

It does take some time for the TCU to adapt to the significant increase in torque throughout different driving conditions and usage.

There are ways to "force" or speed up the adaptation, which can be accomplished by having the transmission adaptations reset at the dealer, or with our DCT/TCU flash (which also resets the adaptation).

[LAKERS333]

Originally Posted by yellowssm

Yup and no problems. Now I just need to get back to the drag strip and see how it does compares to the jb4

Just out of curiosity... What were you running before with the JB4 at the drag strip? 11.XX?

[yellowssm]

Originally Posted by LAKERS333

Just out of curiosity... What were you running before with the JB4 at the drag strip? 11.XX?

11.92 @ 121.01mph
16 M4 DCT
295/35/19 mpss
Jb4 map 2 - 91/e85 mix
BMS intake
Vrsf downpipes
Las Vegas shitty track, 50-60 degree weather

[LAKERS333]

Originally Posted by yellowssm

11.92 @ 121.01mph
16 M4 DCT
295/35/19 mpss
Jb4 map 2 - 91/e85 mix
BMS intake
Vrsf downpipes
Las Vegas shitty track, 50-60 degree weather

Cool, nice.

Thx for sharing, hopefully you can get out there to compare with your new tune. Weather is gonna be much hotter now, I was just in Vegas last week and temperatures were well over 100 degrees already.

[Skasol]

Thank you for the post.

[yellowssm]

Just made another trip to cali for the TCU tune. I honestly didn't think it could shift any faster but I was wrong. Super fast and crisp. I don't know if its me but it seems to shift smoother for some reason? I'll log more miles and report back

[mcvaughan]

Originally Posted by yellowssm

Just made another trip to cali for the TCU tune. I honestly didn't think it could shift any faster but I was wrong. Super fast and crisp. I don't know if its me but it seems to shift smoother for some reason? I'll log more miles and report back

Why we don't get this from the start from the factory?

[MovingChicane]

Originally Posted by mcvaughan

Why we don't get this from the start from the factory?

They saved it for the GTS buyers?

[FSociety]

yellowssm great asset to the community!

can't wait to see your track time with the new tune

[yellowssm]

Originally Posted by ROBNYC

yellowssm great asset to the community!

can't wait to see your track time with the new tune

Thanks man. Should have drag radials in 2-3 weeks since they're back ordered. Active midpipes going on today!

[yellowssm]

VF Hex tune + AA Midpipes + VRSF Downpipes = don't need to buy a full exhaust

[FSociety]

Originally Posted by yellowssm

Thanks man. Should have drag radials in 2-3 weeks since they're back ordered. Active midpipes going on today!

LOL try running without drag radials though otherwise everyone would think the radials were the reason of the great improvement ?

if you can of course