Wastegate adjustment and Nanocom

**rapserv** · 26th November 2015, 11:48 AM

Hi all
Can someone advise what the procedure is when using a nanocom one (1) to adjust the wastegate for best boost on a 2001 td5 auto.
I have done several runs now , in what I thought would be a straight forward procedure, with no real success.
There is very little change through the entire adjustment of the actuator rod with regard to boost pressure ,however, air flow does change and I have been able to get aroung 670 to 680gm/hr. Strange that there is no real movement with regard to boost pressure.
The wastegate controller was replaced a couple of years ago and all hoses from it are intact and connected to their respective locations.

eg. From minimal threads showing to max threads showing

3781rpm 35.87%modulation 85.76Kpa ambient 190.33Kpa boost 683gr/hr airflow (a couple of seconds before airflow disappeared from display ! )

4310rpm 38.16%modulation 86.07Kpa ambient 188.30Kpa boost 669.6gr/hr airflow

If I have calculated it correctly (and I may well be wrong) the first gives a boost of 190.33 - 85.76 = 104.57 this equates to 1.0457 x 14.7 = 15.37 psi

and 188.30 - 86.07 = 102.23 which equates to 1.0223 x 14.7 = 15.038 psi.

Could the fact that I have a TD5 Alive boost box installed causing me issues ??

Sent from my SM-P900 using AULRO mobile app

**SPROVER** · 26th November 2015, 12:23 PM

You need to adjust the actual rod on the wastegate. Undo the lock nut and turn the shaft half a turn and then go for a test drive. Just google "how to adjust boost on a td5" and you should get plenty of information. Then enjoy the extra power.

**sierrafery** · 26th November 2015, 12:35 PM

Hi, off course, as long as you have a boost box fitted you can't rely on MAP readings at all, the boost increasement by shortening the rod is proved by the growing suction, be aware that at 685 MAF reading the ECU cuts fueling for turbocharger overspeed protection ... that's what a boost box does, alters the MAP reading as to not reach the overboost limit, IMO boost box is the worst thing you can do to the ECU's addaptive strategy so if you want boost adjustments with boost box fitted you need a gauge

**rapserv** · 26th November 2015, 05:39 PM

Originally Posted by SPROVER

You need to adjust the actual rod on the wastegate. Undo the lock nut and turn the shaft half a turn and then go for a test drive. Just google "how to adjust boost on a td5" and you should get plenty of information. Then enjoy the extra power.

Thanks SPROVER ... that's exactly what I have done, but there is virtually no improvement through the entire rod length.

Sent from my SM-P900 using AULRO mobile app

**rapserv** · 26th November 2015, 05:42 PM

Thanks for the reply sierraferry.. So are you saying that it is not possible to adjust the boost with a boost box fitted.
I thought the purpose of a boost box was to provide more boost, but if my figures are right then I'm only getting around 15psi !!
Am I working this out correctly?

Sent from my SM-P900 using AULRO mobile app

**SPROVER** · 26th November 2015, 07:34 PM

Originally Posted by rapserv

Thanks for the reply sierraferry.. So are you saying that it is not possible to adjust the boost with a boost box fitted.
I thought the purpose of a boost box was to provide more boost, but if my figures are right then I'm only getting around 15psi !!
Am I working this out correctly?

Sent from my SM-P900 using AULRO mobile app

I have a boost box on my disco and its running 23 psi with no problem .....yet 😆 the boost box is to stop it going into fuel cut off.

**simonmelb** · 26th November 2015, 08:57 PM

Check that your wastegate is moving freely and working and all pressure hoses to the wastegate and modulator are not cracked. ( even though only 2 yrs old?)

To test the wasteagte remove the hose to it and attach a bike pump eg w'th an air bed stem to connect to the wastegate hose.

Less than about half way push on a bike pump and the wastegate should open progressively.

Then if ok, try bypassing the attenuator by connecting the wastegate directly to the intercooler inlet pipe. ( this is how Defenders are set up)

**discorevy** · 26th November 2015, 09:25 PM

Originally Posted by sierrafery

Hi, off course, as long as you have a boost box fitted you can't rely on MAP readings at all, the boost increasement by shortening the rod is proved by the growing suction, be aware that at 685 MAF reading the ECU cuts fueling for turbocharger overspeed protection ... that's what a boost box does, alters the MAP reading as to not reach the overboost limit, IMO boost box is the worst thing you can do to the ECU's addaptive strategy so if you want boost adjustments with boost box fitted you need a gauge

Hi rapserv

What sierrafery said is 100% accurate , the boost box of course allows you to increase boost but the way it does it is to mask what the ecu is seeing which is what you are seeing via nanocom , to set it up properly you need a boost gauge .your readings show that you are increasing boost and everything is working as it should except your AFM which may be working fine but your exceeding its parameters , there are options for this as well, how far above sea level are you?

**sierrafery** · 26th November 2015, 11:44 PM

Originally Posted by discorevy

Hi rapserv

What sierrafery said is 100% accurate , the boost box of course allows you to increase boost but the way it does it is to mask what the ecu is seeing which is what you are seeing via nanocom , to set it up properly you need a boost gauge .your readings show that you are increasing boost and everything is working as it should except your AFM which may be working fine but your exceeding its parameters , there are options for this as well, how far above sea level are you?

That's ^^^ exactly what i meant

... about the sea level question, brilliant point, the AAP reading seemed a bit low to mee too

**rapserv** · 27th November 2015, 10:44 AM

Originally Posted by discorevy

Hi rapserv

What sierrafery said is 100% accurate , the boost box of course allows you to increase boost but the way it does it is to mask what the ecu is seeing which is what you are seeing via nanocom , to set it up properly you need a boost gauge .your readings show that you are increasing boost and everything is working as it should except your AFM which may be working fine but your exceeding its parameters , there are options for this as well, how far above sea level are you?

Ok..I now see that the readings I see on nanocom may be incorrect due to the boost box. I do have an auber digital boost gauge installed but initially thought that the nanocom would be more accurate so have not even referred to the gauge. I will try small adjustments of the actuator rod again through the range this time watching the boost only. If I do notice a gain in boost, is there a max I can go to efore causing any damage?
The main reason for adjusting boost in the first place was to try to reduce my egt which seems to me to be consistenty too high for speed/load configurations.

Sent from my SM-P900 using AULRO mobile app

Thread: Wastegate adjustment and Nanocom

Thread Tools

Wastegate adjustment and Nanocom

Bookmarks

Bookmarks

Posting Permissions