TD04HL-19T
Any feedback available on how these perform, particularly in the higher rev range?
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TD04HL-19T
Any feedback available on how these perform, particularly in the higher rev range?
Should top out around 200kw (27psi at 4000rpm). Lots of people are currently building with this turbo, but not many up and running.Quote:
Originally Posted by rar110
It is more efficient than the he221, particularly in the mid-range but doesn't have quite the flow range or pressure capacity of the HE221. This is due to the difference in wheel design. The 19T wheel has radically backswept blades at the outer rim, the HE221 compressor is 2mm bigger and has less backsweep so it delivers more pressure at lower wheel speeds but has more turbulence in the diffuser and lower efficiency as a result.
The HE221 compressor is good for ~220kw worth of air (33psi at 4000rpm).
One part I am unsure of is the contribution of pumping losses to power. They are already accounted for somewhat in BSFC dropping at higher rpm, but there is also a power loss due to the drive pressure climbing above boost at high rpm.
The 19T at full power I think has a net pressure loss of about 9.6psi across the engine (boost 26psi, drive pressure 35.6psi) which takes 14kw of power to overcome and could reduce crank power to around 185kw at 4000rpm. But half of this loss could aready be counted in BSFC.
The HE221 has a pumping loss of around 12psi and 19.5kw at 220kw crank power. So total crank power could be likely closer to 200.
Anyone had a look at any of the Garrett Gtx series. They are ballbearing and supposedly have more efficiency under much higher boost.
I am running one on a GQ patrol, gtx 2863. It is a much better turbo than the gt 2860 I was running before. It has better boost response in the low to mid areas and will easily keep boosting right throughout the rev range, but I only have enough fuel to run it to about 22 psi. The previous turbo became inefficient above about 16 psi and would cause a large egt increase after this. The gtx has lowered egt quite considerably.
All bigger than ideal in turbine sizing. If you only care about 2000rpm and up they have some offerings. But you'll be making big compromises down low.Quote:
Originally Posted by Northy
Cheers Douglas much appreciated
I just found this post from Randy (Carcrafter): I need 35 pounds of boost!!
185cc/1000 shots on a stock but maxed pump.:cool:
Hi,
I have been reading this thread with great interest, as I have a 6x6 1989 totally standard as far as motor &"IHI" turbo goes except it has a 3'' exhaust pipe.
It is fitted with 3.54 diffs so normal driving is fine, just a bit slow to come onto boost on take off, also when I get into the hills I need more bottom end power & torque. I can cruise at 100ks all day approx., 2,700rpm but as hills hit I need to change down at about 1900 to 2,000 rpm, no power below 1,800rpm. I was going to fit a GT2259 as it seems to be the one of choice. So went in to order one off my friend & mechanic & the first words he said was "I think you will find that it is too big". Apparently he fitted a similar unit to an Isuzu 4BD1T in a tipper truck & they had to change it to the smaller one, a CA18 Nissan. Starts to come on at 1,000rpm & goes through to 3,000rpm. Has anybody had any testing with this unit in the heavier vehicles? Thanks Paul.
Sounds like he's referring to a T25. From what others have said, the rev range is about right. However cruising at 2700, it could be getting close to its efficiency limit. Dougal ran a T25 for some time and will be able to comment.Quote:
Originally Posted by powerband
I have run the CA18DET turbo (T25 with 0.49 A/R turbine housing) on and off for 8 years now.Quote:
Originally Posted by powerband
Currently it's on.
It is an old turbo design but the size is good for running up to 20psi with no intercooler.
If you add an intercooler it'll run out of puff at that boost level.
The recommended GT2259 is an OEM turbo fitted to Hino and Iveco diesels. Part Number 732409.
It is not a turbo in the garrett aftermarket catalogues. The inlet flange is a T3, but twisted 90 degrees to normal and the exhaust A/R is 0.47.
Comparing the two. The GT2259 is the faster spooler. The turbine wheel is smaller OD and the turbine A/R is smaller.
But the GT2259 also has a compressor capable of more boost pressure and more flow. It is also more efficient on both compressor and turbine sides.
Regarding your lower rpm power loss it's likely the boost compensator is shot (if you have a pre-88 engine with one). If you instead have the post 88 engine with no boost compensator and are running the stock turbo then either of those will be a huge improvement but the GT2259 is by far the better of the two.
Power wise, the T25 is out of breath about the clean 150kw mark. The GT2259 is good for around the clean 180kw.