Get alveg sagt þér að þegar ég tók báða hvarfana burtu og setti bara rör í staðin þá varð bíllinn mun sprækari og flottara hljóð. Túrbínan kickar inn mun fyrr. En bíllinn sótar vel þegar maður botnar hann, kemur bara svart strik í götuna :þ Er sennilega ágætis hugmynd að deila á 4 stúta og sleppuru þá ekki létt gegnum mengunarmælingu :þ Eða geta stöðvarnar mælt 4 rör ?

Ætli þeir margfaldi þá ekki bara með tveim ef þeir geta bara mælt einum megin?

En hvernig er það með þessa hvarfakúta, eru þá tvö stykki í þessum bílum? Og báðir þurfa að vera í til að hann komist í gegnum skoðun? Freistandi að taka einn eða báða út ef það gerir bílinn sprækari, en það væri nú meira helv vesenið að þurfa alltaf að fara á verkstæði og smella þeim í rétt fyrir skoðun.

The tuning the BMW 3.0 single turbo 204HP diesel (184HP as well, but let's stick to the last 3.0d that has been fitted into an e46) has some serious milestones:
First, the engine will respond to chipping quite nicely, up to 250 HP. This is the limit of the stock intake/intercooling/exhaust setup.
Intake - just like a gasoline engine, it will benefit slightly from a short-ram induction system. The powerband will shift a bit higher (by some 7-10 HP), however it will also be a bit narrower (full boost comes some 300-500 rpm higher).

Intercooling - the stock I/C will not cope with the mass of air that is being fed into the engine by a chipped engine. We need a big one. 3/5 of the radiator area and 2" thick. The stock visco radiator fan will need replacing for a thin one.

Exhaust - it's a cure for the intake handicap. With the stock turbo, we do not want (repeat: we DO NOT want) to change the downpipe. It would ruin the turbo response provided by variable geometry due to radical exhaust gas pressure change in a widened downpipe. The stock pressure regulation of VTG will not cope with a widened downpipe. Instead, we will want to fit a 3" exhaust, preferably with gutted/removed cats, to remove the quickly-cooling diesel exhaust gases (cooler=slower) from the exhaust. The engine will pull very strong to the redline.

Now we entered the outlaw territory. Such a car is not street legal.

So what? Now, inevitably, another remap comes to summarize all the small improvements. At this stage, the engine will produce 290-300 flywheel HP. If it's enough - stick with it.

If not, source bigger injectors (priceeeeey!) from a 335d plus fuel pressure regulators. Get a new, 255 fuel pump and another remap. You're in 315 hp range. Right on the limit of the engine internals and waaaaaaay overrunning the stock turbo.
These guys http://antandpete.vault5.com/mag0.htm did it more or less that way.
You can upgrade the turbo (if you happen to find a VTG turbo bigger than the stock GT2260V), but some serious internals improvements are a must at this point. Rods, pistons, valvetrain.

Or, swap a 335d engine into the e46. It has already been done in Poland, twice. And yes, one of the engines is chipped from 272 to 350 bhp and over 540 lbs/ft of torque. And yes, there is no need to swap the entire electronics of the car (especially the whole ABS system, which prevented such swaps a year ago) along with the engine.

hefur ekki alltaf verið sagt að með turbo bíla að það sé best að hafa sem minnsta mótstöðu í pústinu.