Fg Xr6T Feels Slower After Custom Tune

[IBOO57]

Im wondering why you didnt drive straight beck into the tuner and ask what is going on?

However with that power it should feel way faster. When mine had 280 it made a stock one feel

like a nugget.

[freeze_dk]

*Beep* had the same problem.. made 350atw then after plenum, turbo and other mods it makes 320atw.. weird

[warren44]

Went back today and they retuned it.Feels alot better now.They told me they changed the torque to come in earlier.

[MiKa]

You still don't seem too happy?

[kartman]

Poor torque down low can only be low boost, or poor mixture/timing if relating to a tune. Why would you do anything other than try to acheive full boost as soon as possible? After all that's the purpose of the roller bearing turbo. If anything you have to pull boost out in the top end with stock injectors due to a lack of fuel. Unfortunatly most dynos are too easy to manipulate, you can drive away with what appears to be 50 kW more on paper but have no more in reality, or even less. I tune both SCT and HP, HP has some difficeincies still, particularly in FG's. There is no way you could have 50 more kW and not notice it. Some tuners do tune for less torque at low rpm to give the illusion of more power when the boost comes on but this is not good practice.

Cheers

[Henz]

Because tuning for as much boost as soon as possible equals an undriveable street car. Some people want that, but who wants a daily driver making full boost everytime they put there foot down just a little bit? The car also will then have issues with traction and the way it behaves from wot at higher speeds.

Mines tuned to ramp the boost on, and my most people that drive it have no idea it's a 12 sec car because for general driving it's manners are perfect.

Plus there's the extra load on the rest of the driveline having full boost asap.

[icer]

mine is a converter issue. completely different to this scenario.

on latest retune did u get more power? or just the way the power comes on differs?

[Paulie2256]

henz, he said try to achieve boost as soon as possible in the rev range. without even realising it has probably been done to your car. you will never be on 15 pound from 1.5k revs, not even 1 pound. its not possible because there is not enough exhaust to spin the turbo quick enough. and you wont have any issues with traction if the boost comes on earlier, in fact you will have issues if the boost comes on later. once you reach max boost you will have a nice torque and power curve throughout the rest of the range.

its not linear power that makes traction issues, its boost getting maxed suddenly high in the revs.

hope that clears it up

[ratter]

we have seen cars come through the shop that it appears the previous tuner has just maxed out the wastegate duty cycle table to make the most amount of boost possible, yes the car feels strong, yes it wheel spins quite easily and yes it is bad on the engine due to cylinder pressure issues at low rpm and most the power is falling over just over 4000 rpm. Tuned this way the car may make 15-17 psi on the standard actuator but falls away after approx 4200 rpm to maybe 9 psi (varies with car to car)

We talk to our customers about how they want the power delivered, especially when they are running a few more mods, we have 1 typhoon that the boost comes on to approx 12 psi and then climbs gradually to 16 psi at approx 5000 rpm, no sudden rush of power as described in previous post, but smooth delivered power. The car will still wheel spin but it does not go up in smoke like some other cars we have seen, the owner uses the car for track days and this is what he wanted. He has run against other similar powered cars that feel initially faster but he can normally drive around them when using street tyres.

[plaine]

I had my xr50t ute custom tuned and made 246rwkw stock and after the tune it went to 270rwkw and it feels like a different car.