Urgent must prepare what questions to ask to car tuner this week!!!

[Daveyonthemove]

Why is a 4wd car on a FWD dyno? And what didn't the video show the results straight after the dyno run? That print could be downloaded from the internet and not relate to your car at all.
So many questions raised by this.

 

[samuelh_888]

2 wheel dynos are commonly used for tuning 4wd vehicle -just unbolt the drive shaft. This is the process R-Tech use too.

 

[bonecore]

1/4 wave resonator tube. Or side branch resonator, Google it. Any decent exhaust shop should be able to do this for you.
http://www.fullsizebronco.com/forum...343489-exhaust-resonator-tube-kill-drone.html
https://classicmotorsports.com/foru...esonator-or-helmholtz-resonator/129212/page1/

ty very much i will do it! now i know what to ask !
it is a very good start. TY!!!

 

[bonecore]

Why is a 4wd car on a FWD dyno? And what didn't the video show the results straight after the dyno run? That print could be downloaded from the internet and not relate to your car at all.
So many questions raised by this.

the car was custom tuned on the road driving, using laptop and obd port by a tuner specialised in this particular engine! This is why i traveled 600km for the tune.
i know thigns are not fake because of the way it drives and i also did another dyno at a local shop which showed 14HP less and 40NM less than than the other dyno. (but the second dyno was made by someone not specialised in this engine and dont know if they knew to set up the dyno for best readings)
anyhow, dyno is just for the before and after ... just to see pwerband and have something to compare too.... dyno otherwise does not mean much more.

on the second dyno first time it had 360NM and then changed some numbers on the dyno and put load on it and then it reached 400nm on less rpm.
like i said , best is for the tune to be made on the road.... that is what people in the forum say.

 

[SootySport]

2wd dyno should be ok as the Haldex coupling will not be engaged anyway. Or maybe I'm wrong...........again.

 

[bonecore]

2wd dyno should be ok as the Haldex coupling will not be engaged anyway. Or maybe I'm wrong...........again.

yes, dyno is fine on 2wheel dyno
u can disconnect connection to haldex ecu or fuse or somthing... and thus traction will be fron only. (better let an electrician do this)
for me ... i had the haldex ecu out of the car and sent to england for repair... so only front pulled at the time the dyno was made..

 

[nluk100]

You can unplug the haldex fuse on pre-facelift cars, but you need to disconnect the driveshaft on later cars. You should NOT risk running haldex without doing this on a 2wd dyno as any slip will send power to the rear wheels and could throw the car off balance.

These made me laugh ...

 

[S.]

Fuse out works with facelift too. Even with haldex performance controller.

 

[bonecore]

Other questions that i have asked the tuner were:
1) mine is an AXX engine code, first version of 2.0 tfsi that had problems with intake camshaft lobe that sits near HPFP. What intake camshaft should i buy if i have problems and will the tune need modification?
--> response: get revision with last letter B on the intake camshaft.... that is used on engine BWA. For this the engina map needs no modifications

2) what boost pressure is set on my K03 turbo?
-->Response: boost pressure follows the torque curve. At max torque i have 1.5bar and at redline i have 0.7bar
my powereband results are between 4500 - 6500 rpm(verified on 2 dynos)
my max torque results on dyno with no load is at 4200rpm and with load is at 3500 rpm. In real life on the road ,tuner said it is at 3200 rpm!

3)How often should i do maintanance on car after tune?
oil - 7500km . He said i can stop using millers because it is more difficult to find and if im spirited driving i also can use Valvoline 5w50 for winter and Valvoline 10w60 for summer
HPFP cam follower - every 2 oil changes
spark plugs - every 2 oil changes
DV,pcv , coilpack - lifetime and only use 98 RON+ gasoline.

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now i need to fix the exhaust and some other bits and bobs and mount shortshifter and im almost ready to fully enjoy the car