GARRETT TURBO?

[bert]

GT 1544 Anybody had any experience of this turbo? I have a 1.9 TD AAZ engine.  Will this turbo be any good?
Cheers,
Bert

[Benjamin]

i dont know how much hp you wanna make.
anyway, its to small.
it doenst have a good perfomance to tune youre 1.9 to.

Greetz, Benjamin

[bert]

benjamin,thanks for the reply,i have a garrett t3 off a 1.6 TD,i was told it is better for the 1.9 TD?
Cheers Bert

[TDIMeister]

Bigger is not necessarily better.

The GT15 (I assume coming out of a 90 HP TDI) will comfortably support 18-20 PSI of boost with good efficiency.  This is more than most AAZs can reliably take advantage of without internal modifications.  I had a Passat TDI with 300k kms modified to the tune of 140 HP, using this original turbo and running at 21 PSI boost sustained for almost 5 years.

Big turbos are a joke unless your engine is insanely tuned.  As a stock- or near-stock replacement, the GT15 is a huge improvement over the T3 in terms of spool response and efficiency.

[Benjamin]

i looked at the Garrett site www.turbobygarrett.com
there exist 3 GT1544 turbo's,

GT1544 - 452195-1
Horsepower 75 - 175
Displacement 0.9L - 1.5L

GT1544 - 454082-2
Horsepower 100 - 150
Displacement 1.0L - 1.6L

GT1544 - 454083-2
Horsepower 100 - 150
Displacement 1.0L - 1.6L

so, a 1.9 should be to big.

the gt15 will spool quick for 2reasons, its the newest product from garrett, the GT series (T series are older), the turbo is much smaller, but keep in mind the flow will higher with the T3.

@TDIMeister: i dont know how big the compressorwheel is, if this is bigger, it will give more....

OFFTOPIC: when we look at the pic you can see the airflow is the highest on 2,25bar. How much pressure can Garrett GT series handle (for long lifetime?)


Greetz, Benjamin

[TDIMeister]

There are literally hundreds of Garrett part numbers within each turbocharger family like the GT1544.  The ones that are original equipment for VW alone are listed here.

With all due respect, please don't use marketing info to form a basis about whether a turbo is too small or not.  A correct compressor map (you showed a turbine map) is the best piece of data you can have.  Those numbers you quoted are for GASOLINE engines which rev higher (as much as 50%) and therefore have higher maximum airflow ratings for a given engine displacement, and at best are very much "ballpark" suggestions.

I HAVE done the calculations and I can tell you that a GT15 has no problems efficiently supporting a 1.9L Diesel engine to over 140 HP.

The Garrett T-series family is based on 3 decades old technology, and the newer technology can match and far exceed the mass flow, efficiency, response and broad operating range of the older counterparts using much smaller frame sizes.

[TDIMeister]

Here are more exhaustive listings of OEM GT15 applications:
http://www.turbomaster.info/eng/catalogs/model.php?base=garrett&pagina=GT15
http://www.turbomaster.info/eng/catalogs/model.php?base=garrett&pagina=GT15P
http://www.turbomaster.info/eng/catalogs/model.php?base=garrett&pagina=GT15Z

[935racer]

I am gonna have to disagree with you big time there Dave, the gt15 is much too small for a 1.9. Yes I know you can get them to push 140WHP, but that really is out on the edge for that turbo, the turbine is simply much to small for this engine, the turbo's drive ratio on a 1.9 is approx. 2.8:1, which is terrible. The turbo from the 1.6 is not big by any means, it is very properly sized for the 1.6 engine and a tad small for the 1.9. You will see 40 degrees drop in oil temperature and nearly 200 degrees (depending on state of tune)  drop in exhaust gas temperature, plus the obvious signifigant drop in exhaust back pressure. Also you now have a MUCH better compressor map.

[bert]

Thanks guys for all the replys,i have removed the kkk k03 turbo from the 1.9TD (non tdi) and i am going to put the garrett t3 in its place,the turbo is physically bigger,the inlet and outlet ports are bigger,the pressure hose to the inlet manifold is a bigger diameter,the turbine is alot bigger than the other,when i drove the mk3 golf (engine donor car)it had a cataliser on it,power steering,it was nippy but there was no real kick as the turbo came in,my mk2 jetta with SB engine has the kick and can be felt to cut in.
Will the 1.9 be ok with the 1.6TD turbo the garrett T3?

 :roll:
THANKS Lee

[935racer]

Definately, I have done a bunch of the t3 swaps onto 1.9's, for a daily driver they are great, much better suited to the engine than any of the stock 1.9 turbos, the ko3 being the worst of the bunch, so you are really making a step forward.

[bert]

Dave,really appreciate the help,i can sleep better now  :wink:
Cheers Bert

[935racer]

Hey now worries man  Now you can crank up the fuel and boost

[addautomotive]

I replaced the k03 in my 1.9 with a Garrett T3. I love it... there's a bit more lag around town, but it's still a huge improvement.

[bert]

:wink:
when the engine is in my mk1 i will let you know how i get on!
Thanks all
Lee

[bert]

Ah,snag, the oil drain off to the block is different from the stock k03 turbo to the garrett t3 i have fitted,i have cut the two pipes and welded the garrett flange to the aaz drain pipe,its all ok now  
Right then,the inlet manifold on the 1.9TD is on the engine with the t3 turbo,i have looked at the 1.6TD inlet manifold and have noticed a blow off valve fitted to it,question-why does the 1.9 not have one? and do i need one? the turbo came off the 1.6TD
Thanks lads
Bert