As most of us know, 1.5 TSIs are efficient and among the most-used engines in our country. Although they have small chronic issues, most mechanics can now easily diagnose the problems. Again, as you know, with a Stage 1 tune it's possible to get around 180-185 hp from the 150 hp DSG versions (on-paper data). So what should be done when we want to go beyond these figures? If anyone came across it on the channel called CV Films, there's an Mk3.5 Leon in İzmir running around 230 hp quite healthily. If I remember correctly it should have a hybrid turbo. What's the reason these engines aren't pushed much beyond Stage 1? What are the effects of a downpipe on the car's power or on the stress on the engine? I think we can have a healthy discussion on these.
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4 repliesI'm speaking purely hypothetically, I haven't experienced it myself, but I think the first reason could be the DSG's lifespan shortening due to the high torque; when that's not taken into account, fuel comes into play - the fuel quality here and now in our country, and following that, the operating temperatures of TSI engines could pose a risk, I think. Of course there are safe setups - by lowering the intake temperature and adding fuel, we could say it can hold up to around 280 hp. After that, the direction changes, like an RS-badged G20 :)
Translated from TurkishAmong the DSG types, the DQ200 dry-clutch is mostly known for its pressure-tube problems, but I think the DQ381 is a bit more suited to this tuning business
Translated from TurkishI'm running a stock 1.4 TSI 140 hp Octavia with a dual-sided IHI hybrid turbo, a K&N cold air intake box filter, a downpipe, and a custom tune, on a max E10 setup. Your car has a Mihi turbo — if the turbo shop is experienced, they can hybridize it too. For fuel quality you can safely run E10.
Translated from TurkishThe tune on your DSG type can be left safe - with just a downpipe, the flow eases up in mid and top-end pulls, no noise, there's just a small rattle at high revs.
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