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(Post Link) post #1 of 22 Old 02-05-13 Thread Starter
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1.9JTD Turbo Upgrade's

Been looking at the GT2256 from a 156... am i right in saying its manually actuated? and my current GT17 is electronic? if thats the case, how do you get around getting it to fit/work on the 1.9 16v engine?

also, mounting, much difference? oil lines?
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Considering the same upgrade speak to JS JTD.
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All Alfa 2.4 GT2256v turboes are vacuum operated with ECU control, same as the GT1749v ones found on the 1.9 engines.
Only the cf2 105hp and 136hp turboes, and the cf3 100hp are mechanically pressure controlled.

Last edited by JS JTD; 02-05-13 at 17:39.
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I have a nice gt2256 for sale , pm for details
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I have a nice gt2256 for sale , pm for details
How much?
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is the Alfa 2.4 GT2256v a direct replacement or does it need work to either the exhaust flange, inlet or locating holes?

cheers kris
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you'll need a custom downpipe.
Holes in the manifold can be redrilled to fit the gt2256v.
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The 1.9 CDTI would be best sticking with a GT17 turbine unless you want to go for very big power figures. The standard turbine can flow enough for 228 wheel power, which get quoted from 250-290bhp from various rolling roads.

Even a small turbine trim will effect the pick up at bottom end.
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(Post Link) post #9 of 22 Old 06-05-13 Thread Starter
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How would you go about hitting bigger power?
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Bigger turbo.
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I cant see a std vnt 17 turbine doing over [email protected] fly safely even with a cutback turbine
what turbine exducer has the Vectra got? 38.6mm?
I suppose its about the reliability , any turbo will do high hp for a while.
compare a gtb1756 to a gtb2056 similar but 2056 has 43mm turbine exducer and 1756 has
a 41mm exducer
doesn't sound much but some give that 2mm worth 30hp
if a 17 turbine was ok to 220-250 hp garret wouldn't make larger units
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Originally Posted by sussexa View Post
I cant see a std vnt 17 turbine doing over [email protected] fly safely even with a cutback turbine
what turbine exducer has the Vectra got? 38.6mm?
I suppose its about the reliability , any turbo will do high hp for a while.
compare a gtb1756 to a gtb2056 similar but 2056 has 43mm turbine exducer and 1756 has
a 41mm exducer
doesn't sound much but some give that 2mm worth 30hp
if a 17 turbine was ok to 220-250 hp garret wouldn't make larger units
+1

For +/- 200 hp a GT17 based hybrid will do fine, but for bigger numbers it is not recommended for reliability. EMP/EGT will be very high.
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+1

For +/- 200 hp a GT17 based hybrid will do fine, but for bigger numbers it is not recommended for reliability. EMP/EGT will be very high.
You should make a plug and play kit with the 2256
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He can.
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He can.

Interesting - would be cool to hear some general numbers.

Hp, full boost, supporting mods etc
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If you want to see, what's GTB2056 capable of, see charts in my thread - https://www.alfaowner.com/Forum/tunin...ml#post4993235
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If you want to see, what's GTB2056 capable of, see charts in my thread - https://www.alfaowner.com/Forum/tunin...ml#post4993235
Thanks Yanko

Have off course already went through your thread I known the 2056 is wonderfull, but the price is crazy.

I was talking about the 2256 from 2,4 175hp. It seems like a good turbo all things considered. Price, hp, lag, fitment etc.
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(Post Link) post #18 of 22 Old 08-05-13 Thread Starter
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Interesting - would be cool to hear some general numbers.

Hp, full boost, supporting mods etc
same... if its straight forward enough, i may have to start getting parts together!
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The standard turbine with a 43.4/56 compressor on it with standard injectors and water/methanol at 0.8 ltr/min 50:50 mix was enough to yield 228 wheel power, not flywheel. So the standard turbine can flow plenty of gas for bigger figures but I was also about to run 224 wheel power with a much smaller 39.6/56 compressor and trimmed turbine on the same fuel setup. So there would be gains from more flow but you'll start slipping the spool threshold up the rev range and get lag. The housing on the 1.9CDTI turbo is large enough to happily take a 60mm compressor wheel but the threshold for that on a standard turbine is already about 2000rpm. I know they make a GT25 ball bearing unit now and my turbo manufacture is going to get hold of a core to see if it can be tailored into the standard unit. If it could, the spool threshold might come down enough to concider a trimmed turbine on a 60mm wheel.
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Hi js jtd , I've got a 1.9 16v complete eng + box from a 147 hoping to put it in my grande punto,I'm looking to buy a manifold for the 2256 to fit the engine can you help or point me in the right direction thanks
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Hi js jtd , I've got a 1.9 16v complete eng + box from a 147 hoping to put it in my grande punto,I'm looking to buy a manifold for the 2256 to fit the engine can you help or point me in the right direction thanks
You can modify the standard exhaust manifold and GT2256v turbine flange to fit. Just drill some extra holes.
Or you can have a custom manifold built, which ofcourse has a price tag.
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You can modify the standard exhaust manifold and GT2256v turbine flange to fit. Just drill some extra holes.
Or you can have a custom manifold built, which ofcourse has a price tag.
Hi, it is old thread, but the topic is actual.
I have 156 8V (115hp) 1.9 JTD also, and did find a turbocharger from 2.4 JTD 140hp (103kW) 710812-1 (Is it GT2256?), is it as easy to fit as described above? Only drill extra holes? If Yes - I will buy it. Or I have to make custom downpipe as mentioned earlier?

Thanks for reply in advance!
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