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Tuning & Upgrades Discuss performance enhancements for your Alfa Romeo

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(Post Link) post #1 of 59 Old 01-02-13 Thread Starter
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Jtd 2056vk

This is my Fiat Stilo JTD 8V, 2056 VK turbo from VW Tuareg,4 bar MAP sensor, FMIC by Forge, exhaust made by myself, Brembo brakes with 4 Pistons etc. The soft is on progress. Stock fuel pump, 1350 bar, We can' t get over this limit, boost pressure is 1.9. The car it's working very good but we still have to work to increase the power.
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That looks like some good work, bet its great to drive
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Dyno from Alfa 156 JTD105 (CF2) with:

-GT2256V (from 2.4JTD150)
-FMIC
-Fuel Radiator
-Stock Exhaust

Boost is mechanically controlled in CF2 ECU's, and regulated to 1.7 Bar
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(Post Link) post #4 of 59 Old 04-02-13 Thread Starter
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Nice job, for a 2256 the spooling is great, very good work, and you have CF2 injection. But I now that 2256 is VNT, how did you make it manual?
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Originally Posted by Rao Motorsport View Post
Nice job, for a 2256 the spooling is great, very good work, and you have CF2 injection. But I now that 2256 is VNT, how did you make it manual?
I think with a pressured wastegate and a mecanical overboost (optional).
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Max power at 4700rpm, not bad for a 8v head
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(Post Link) post #7 of 59 Old 04-03-13 Thread Starter
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Completechip engineering

This is the last configuration
Rail pressure is set on 1550 bar
Injection time increased with 33%
Boost 1.9 bar
EGT under 530 celsius degrees.
MAF-less, it's working only with MAP sensor.
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Last edited by Rao Motorsport; 04-03-13 at 18:09.
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(Post Link) post #8 of 59 Old 05-03-13 Thread Starter
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Dyno made today, +10 horse power:
1600 bar Rail Pressure
75 mg/stroker
1.9 bar boost
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Very nice result!

But only 75 mm^3/i injection and 530 C EGT? That I find very strange.

I'd expect 100+mm^3/i injection and 900+ C EGT with these values on a JTD 8v.
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He says 75mg not mm3.
Closer to 90mm3 if injector calibration is all o.k after such large pressure change, might be more than that even if not.
The high boost pressure may have helped keep egt down?
Looks good graphs anyway any vids of smoke?
What ve does the 8v head have near 4000revs?
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I would rather vote for missplaced EGT probe and overset injection duration. Anyway nice result. Definitely there are still reserves at mid/high revs. As I remember, VE was ~90% @4000+ on my modded head. But it may be inaccurate due to my upgraded MAF and reworked intake.
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Quote:
Originally Posted by Rao Motorsport View Post
Nice job, for a 2256 the spooling is great, very good work, and you have CF2 injection. But I now that 2256 is VNT, how did you make it manual?
I had a GT2256V fitted on my CF2 2.4 aswell. Change the vacuum operated solenoid with a boost operated solenoid and you're basically there... it replaced a TD2503V on that engine
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(Post Link) post #13 of 59 Old 06-03-13 Thread Starter
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My mistake, I spoked with my tuner and he told that I am wrong, the real injection is betwen 95mm3 and 105 mm3.
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Quote:
Originally Posted by Rao Motorsport View Post
My mistake, I spoked with my tuner and he told that I am wrong, the real injection is betwen 95mm3 and 105 mm3.
Then I was not that far off.

Do you have picture of your EGT probe installed?
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Bugging me now, avetar looks famililar did this used to be geti or something similar?
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I think you are right. That's what dissapoint me a bit - getting info as Geti and presenting the results as Rao Motorsport ;-/

But maybe there's something else in behind.
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Quote:
Originally Posted by TMC_Motorsport View Post
Dyno from Alfa 156 JTD105 (CF2) with:

-GT2256V (from 2.4JTD150)
-FMIC
-Fuel Radiator
-Stock Exhaust

Boost is mechanically controlled in CF2 ECU's, and regulated to 1.7 Bar

At what fuel rail pressure was that achieved?
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(Post Link) post #18 of 59 Old 08-03-13 Thread Starter
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Well Happy

Yan.ko, I have changed my nickname from Geti to Raomotosport, I don't think that is a problem, is it?
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At what fuel rail pressure was that achieved?
About 1600Bar!
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Appologies if offence taken, its no problem for me what name or if your a tuner i just recognised the pic in avatar and thought it may have been sold on maybe.
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(Post Link) post #21 of 59 Old 09-03-13 Thread Starter
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Wave

No problem at all. Best regards, Raomotorsport.
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(Post Link) post #22 of 59 Old 14-02-15 Thread Starter
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Work in progress:

Custom exhaust manifold Up position turbo GTB2060VK
Custom downpipe 63 mm
Custom air manifold 70 mm in
Custom inlet with ITG Filter and 80 mm MAF
The battery was moved in the trunk

To be continued...
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Last edited by Rao Motorsport; 14-02-15 at 15:56.
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Looks very nice

I'd advice you to run wider intake pipe already from the compressor inlet, to avoid creating high speed central airstream, which will affect negatively the MAF reading.

I also plan to put Helmholtz resonator chambers back to supress back flowing pulses affecting the MAF reading.
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Ealier he said he's not using the MAF, only MAP. The MAF might be ony there to keep the fault codes away
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(Post Link) post #25 of 59 Old 14-02-15 Thread Starter
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Thank you yan.ko, you are right but Cuore_Sportivo he is also right, I don t use MAF, I am MAF-less. I used 80 mm MAF just to have enough air at high Rot/min(rev) even so, we returned to the pipe and we found another solution and now it has allready been redesigned. Like yan.ko we also made: "smoothened, reshaped and enlarged intake/exhaust ports and valve seats, three angled valves, and some other jobs (resealed valve stems, grinded bottom head surface", stock camshaft for the moment.
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File Type: jpg 10997228_634877236655905_791775212_n.jpg (73.9 KB, 41 views)
File Type: jpg 11004935_634877243322571_1254213894_n.jpg (80.8 KB, 47 views)
File Type: jpg 11005763_634877219989240_1153875990_n (1).jpg (85.8 KB, 39 views)
File Type: jpg 11005727_634877273322568_1945579017_n.jpg (90.8 KB, 38 views)
File Type: jpg 11005958_634877283322567_1438577381_n.jpg (54.4 KB, 35 views)

Last edited by Rao Motorsport; 14-02-15 at 20:50.
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