How To: Adjust TD5 Boost Pressure.

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Originally Posted by Fluids

So I've finally tweaked up my wastegate this afternoon. Thanks for the how to.

2 x full turns on the adjuster to shorten the rod. Take it for a drive. Best I saw on the nanocom was 1.24 - 18psi. (Best in the past was 1.20 - 17.5psi) Did a second run and recorded the fueling to the nanocom. go home ...

Another 2 x full turns (now 4x turns) on the adjuster to further shorten the rod. Take it for a drive. Best I saw on the nanocom was 1.36 - 19.7psi ... no fuel cut-out. Did a second run and recorded the fueling to the nanocom (second run is a standing start, up hill about 20deg onto a main road, foot to the floor until 120kmhr, gear changes occuring about 4200rpm).

I loaded the fueling records from the nanocom into the laptop, and using the graphic viewer, the best of the two runs (1st run / +2x turns) showed ...

air inlet press 232.83999
ambient air press 100.26000

which makes actual boot pressure 132.57999 kpa / 19.23 psi

Definitley makes a bit of difference down low, off the line, with the boost coming ontap sooner.

Is it worth trying to squeeze a bit more out of it ? Or am I that close now, just drive it for a while and see ?

Kev..

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I have adjusted mine until I can shorten the rod no more but my boost will not go any higher than 205kpa. EGR gone, silicone hoses, clean intercooler. Any thoughts?

needs more fuel, to make more exhaust gasses, i found this with mine, b4 the chip, i was running 243kpa at about 4-5 threads left, put the chip on i would hit OB in first second just driving normally, had to wind the boost back heaps to compensate, just a thort,, or thats the big chip im running;)

hint, get a chip:wasntme::wasntme: ,hint,

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Originally Posted by stig0000

needs more fuel, to make more exhaust gasses, i found this with mine, b4 the chip, i was running 243kpa at about 4-5 threads left, put the chip on i would hit OB in first second just driving normally, had to wind the boost back heaps to compensate, just a thort,, or thats the big chip im running;)

hint, get a chip:wasntme::wasntme: ,hint,

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I'm chipped I think. It says Bruce Davis on the chip but I purchased the vehicle with this chip in place so I have no idea of the details. Beginning to wonder if the fuel filter is not maybe blocked?

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Originally Posted by Milton477

I have adjusted mine until I can shorten the rod no more but my boost will not go any higher than 205kpa. EGR gone, silicone hoses, clean intercooler. Any thoughts?

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Wastegate stuck partially open ?

If you've got a BD chip in it, it should be overboosting like crazy with the wastegate set like that!

???

Kev..

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Originally Posted by stig0000

needs more fuel, to make more exhaust gasses, i found this with mine, b4 the chip, i was running 243kpa at about 4-5 threads left, put the chip on i would hit OB in first second just driving normally, had to wind the boost back heaps to compensate, just a thort,, or thats the big chip im running;)

hint, get a chip:wasntme::wasntme: ,hint,

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Thank you Stig!

.... so I can creep up a bit more from my 232kpa. No chip yet.

243kpa - 100kpa = 143kpa = 20.75psi .... there's another psi to be had. :)

So far at my current settings, no overboosting.

Kev..

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Originally Posted by Fluids

Thank you Stig!

.... so I can creep up a bit more from my 232kpa. No chip yet.

243kpa - 100kpa = 143kpa = 20.75psi .... there's another psi to be had. :)

So far at my current settings, no overboosting.

Kev..

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It will overboost after 237, mine did, it will also start missing(well give the feeling of missing) this is it overboosting, it doesn't always go into a default mode after overboosting, it can go into and out of limp/default mode giving the feeling it is missing, Landyandy had the same problem.

A TD5Alive or B.A.S Boost box will stop this.

Leave it at 232.

Baz.

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Originally Posted by Milton477

I'm chipped I think. It says Bruce Davis on the chip but I purchased the vehicle with this chip in place so I have no idea of the details. Beginning to wonder if the fuel filter is not maybe blocked?

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iv tryed a few chips now,, and i do think one of them was a BD chip, and it made pretty much no difference at all, so off that tune went a another one on,

if the fuel filter is blocked bad and youv replaced it, there is another one to clean out and that is behind the fuel block, had a few were wev change the main and bugger all to no difference, clean out the fuel block filter and way we went, its a very very fine gorz filter and easily gets block with the paper from the main filter,( id rather that blocked then my injectors)

Reporting back ....

Did a run to Sydney sunday to the 4WD show. Across the Moonee Moone bridge and up the other side, cruise on, at 110km/hr, and up the other side over the Hawksberry bridge, and up the hill after the Gosford exit, she pulled away happily locked in 4th with the Nanocom showing about 1.27 bar (18.5psi).

Normally on those 3 hills it will unlock in 4th and rev to about 3250rpm. It held 2500rpm locked up with the extra boost it's now got. I also notice that the cruise control seems a bit more stable ... because the boost is more/sooner it hold a more constant speed over undulating terrain ... you can feel it kicking in, and where I'd used to be lucky to see the boost hit 1.2 (usually around 1.1 to 1.16) it now runs 1.2 to 1.24.

It has really made a marked improvement! I reckon I can still wind it up a bit further :)

Kev..

is this done with a remap/chip,or can it be done with the standard ecu.

Standed is fine.. just need somthing to note your boost