Welcome to JTD-Performance.com, the only shop specialized in tuning hardware for JTD engines Where remapping ends, JTD-Performance will continue! Take a look around in the shop and do not hesitate to contact us for questions.
We offer performance parts for a wide range of engines. Everything from the 1.3 MultiJet to the 2.4 JTD for example. We also offer tuning parts for TBi and MultiAir Engines.Wij bieden performance parts aan voor veel verschillende motortypes. Alles van de 1.3 MultiJet tot bijvoorbeeld de 2.4 JTD, daarnaast bieden wij ook dieverse tuningdelen aan voor TBi en MultiAir motoren.
We always include a manual with the products that are more difficult to install, you can choose if you want the manual on paper or if you also want it digitally on or special platform at checkout.
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JTD-Performance
Engine performance parts for JTD and TBi engines
We are happy to announce that we have expanded the tuning services due to a new collaboration with Squadra Tuning.![]()
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Squadra Tuning has grown to one of the most famous Alfa Romeo software tuning companies worldwide, and has a solid reputation when it comes to making effective & reliable tunes.![]()
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From now on we are able to do the Squadra TCU tunes for the Giulia and Stelvio with ZF8HP gearbox, in Stage 1-2-3. ![]()
Applicable to 2.0T, 2.2 JTD and 2.9 V6 versions.![]()
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The gearbox tune really makes a big difference in driving experience, as the stock TCU software is mostly based around low rpm, reduced emission driving. With the new tune the car will feel much more responsive to throttle inputs.![]()
An extra bonus at the Giulia & Stelvio 2.2 JTD is, with Race Mode installed, it is now possible to have the shift paddles activated as well.![]()
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Also for Giulia and Stelvio 2.0T engine tuning, including the upgrade turbo software, we can provide the Squadra tunes so customers have the opportunity to have the full upgrade package (parts, assembly and software tuning) all at once.![]()
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As regards to JTD engine software tuning, nothing will change in that section, we will continue providing our specialised software that works most effectively with the performance parts from the shop.
Air filter tests part 3![]()
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RESULTS!!![]()
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We did a one minute idling test while logging the temperature. After that a cooling down run followed by two opposed direction pulls in 3rd gear.![]()
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Check the images for the data. First one is raw data directly from the SD card. We use Datplot to organize the data and plot it in curves, and Excel to finalize and present the results.![]()
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And the winner is...............................![]()
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The closed airbox with the BMC drop in filter!![]()
Surprised? ![]()
To be honest, we were kind of expecting this, we just wanted to see with our own eyes.![]()
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By far the biggest enemy of performance is the high temperature air which is taken in by an open cone filter under the hood. Yes, the pressure drop is a little bit lower than a stock system, but that does not compensate the negative temperature effect.![]()
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So, can we from now on please stop calling these cone filter systems "CAI" (Cold Air Intake), as it really does not make any sense. Better would be "HAI" or "Filter on a stick". ![]()
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Case closed.
Air filter tests part 2![]()
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Comparing an open air filter with a boxed panel filter. Before we move over to the results, let’s examine the car and which air filters we used.![]()
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The tests are performed at a Giulia 2.2 diesel with a liquid cooled intercooler. This car has lots of other mods like an upgraded turbo and is running with a tuning at approx. 300 hp. We also have water methanol injection for an additional 15-20 horsepower but we did not use it in the test, as for a comparison this does not add anything other than complexity.![]()
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Now before you Giulia 2.0T owners say, pity it is tested at a diesel, hold on. The air filter does not “know” whether it is coupled to a diesel or petrol engine. You can see the engine as an air pump or flow bench if you will, and we are measuring the losses in the intake system. What matters is the amount of air passing through, and what we tested is actually very close to the airflow in a tuned Giulia 2.0T that will run anywhere between 280-320 hp.![]()
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As a matter of fact, the closed airbox is one from a Giulia 2.0T. The factory diesel airboxes are a bit lower than the 2.0T versions because of the engine cover that is extended to suppress the diesel engine noise. We have cut the engine cover, so it has more the dimensions of the petrol version as we found this was more beneficial for the temperature inside. ![]()
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Then for the open filter, we did our best to make it as freeflowing as possible. So no reductions in diameter before the MAF (as some do) and basically the biggest cone we could fit in the space available. We used a Mishimoto 3508 filter with a 3.5” / 90mm connection diameter. Then a short 3.5” stainless elbow to angle the filter downwards to the factory cold air passage and a 90-80mm reducer to connect to the MAF. For both intakes we kept the alu insulated pipe, MAF and silicone reducer the same as we are particularly interested the air filter component.![]()
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Stay tuned for the final part with the results!
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De Huufkes 33K
5674 TL Nuenen
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