Thread: Turbo Rebuild Limited Td5

Just thought I'd post this here FYI - from nismine01

New 'uprated' turbo in.

If anyone is looking for the housing bolt torque settings...

GT20specs.pdf

Thought I'd put a couple of tanks of fuel through before adding to this
Pre upgrade. / Post upgrade
AAT 15 degrees. / 17 degrees
Aap 101.7 / 101.3
Max boost 1.32. / 1.38
Max air flow 674.5. / 678
Max coolant 91.9. / 93.5
Max revs 4266. / 4158
Max speed 117. / 121
Max iat 45.2. / 56.3
forgot to record max egt , but was still safe (around 650 from memory )
These figures were taken with no adjustment to Wastegate .standing start , same stretch of road same distance , d2a , 310 000 k's , auto , with beefed up low stall (2350rpm) converter free flow exhaust and fairly robust remap , (but not to suit turbo, ), after these figures were taken a boost box was fitted and boost increased to 1.55 bar ( around 22.5 psi) , this now maxes out the AFM so working on that solution but overall a very worthy upgrade as others have commented , there is a noticeable increase in turbo reverb noise so not sure how accurate the vsr ( vibration sort rig ) is, though the datasheet showed acceptable , it may be down to the longer vanes on the compressor side ( I don't mind the noise) re the fuel economy , brim to brim , the first tank returned 9.4 l/100 k , second tank 9.7 and I'm no light foot , I tried for about 5 minutes but then........zzzzz
I have never got better than about 10.2 in the past so very promising
Hope this helps those interested

Originally Posted by discorevy

Thought I'd put a couple of tanks of fuel through before adding to this
Pre upgrade. / Post upgrade
AAT 15 degrees. / 17 degrees
Aap 101.7 / 101.3
Max boost 1.32. / 1.38
Max air flow 674.5. / 678
Max coolant 91.9. / 93.5
Max revs 4266. / 4158
Max speed 117. / 121
Max iat 45.2. / 56.3
forgot to record max egt , but was still safe (around 650 from memory )
These figures were taken with no adjustment to Wastegate .standing start , same stretch of road same distance , d2a , 310 000 k's , auto , with beefed up low stall (2350rpm) converter free flow exhaust and fairly robust remap , (but not to suit turbo, ), after these figures were taken a boost box was fitted and boost increased to 1.55 bar ( around 22.5 psi) , this now maxes out the AFM so working on that solution but overall a very worthy upgrade as others have commented , there is a noticeable increase in turbo reverb noise so not sure how accurate the vsr ( vibration sort rig ) is, though the datasheet showed acceptable , it may be down to the longer vanes on the compressor side ( I don't mind the noise) re the fuel economy , brim to brim , the first tank returned 9.4 l/100 k , second tank 9.7 and I'm no light foot , I tried for about 5 minutes but then........zzzzz
I have never got better than about 10.2 in the past so very promising
Hope this helps those interested

Love the data! Well documented.
That speed is miles per hour right?

Originally Posted by discorevy

this now maxes out the AFM so working on that solution

I've have made a mod for the stock MAF that extends the range out to about 830 - 850kg/hr.

It should be reasonably accurate - not that it makes any difference really as the changes are made well above what the ECU uses to calculating fuelling.

The tuner pro XDF's I make have a patcher to apply/remove the mod.

I'm back from my trip, 5500Km towing a 1500Kg camper trailer.

It was a lot easier towing with the new CHRA compared with the original turbo. The ability to hold my speed on hills without having to plant the accelerator and worry too much about EGTs was a big bonus.

This will be more specific to my ECU reMAP but holding the boost around 16Psi gave plenty of power without high EGTs (450-550*C pre-turbo), in my manual D2 this is about 2250rpm in 5th at 100kph so ideal (Yes I know you shouldn't tow in 5th).

Fuel economy was also very slightly better, a drop of 1ltr/100Km compared to a similar trip with the original turbo.

So I'd definitely recommend fitting the hybrid CHRA if you tow.

​Hello,

Just a further update on the cartridge install.

It whistles noticeably more than the original turbo. I can't ever recall really hearing the original turbo much at all.

The air box has had the you beaut turbofan fuel saver thing and other bits removed from inside the airbox as well as the muffler replaced with a straight through section of exhaust pipe.

Like I said, a bit more whistly(is that a word?) but not a real bother as there is no muffler anyway.

Cheers,

Jason

Originally Posted by Jason789

​Hello,

Just a further update on the cartridge install.

It whistles noticeably more than the original turbo. I can't ever recall really hearing the original turbo much at all.

The air box has had the you beaut turbofan fuel saver thing and other bits removed from inside the airbox as well as the muffler replaced with a straight through section of exhaust pipe.

Like I said, a bit more whistly(is that a word?) but not a real bother as there is no muffler anyway.

Cheers,

Jason

Is the whistle a familiar tune? does it get stuck in the head?