Easy to tell somebody doesn't know anything without having anything to say.
The 3 Diesel engines I drove had maxed out stock injection without maxing out the turbos.
In this case (alh) it is the same. First you will max out the injectors then turbo then the injection pump itself.
Yes, it's easy to say, because what you are saying is incorrect. For 99.9% of the engines.
ALH is the same, you can have black smoke on stock injectors and stock turbo. AFN too.
so BTT:
1: stock ecu is shooting very lean like 22-19:1, you should shoot for about 15:1, just go richer till you see smoke. how much smoke is oke for you u have to decide on your own.
Lambda 1.03 on diesel = huge black smoke and molten pistons.
2.there is a problem if injection timing is too long. a lot of fuel will then be burned while the piston is going down -> will generate lot of smoke and heat but very low power gain. to know how long your injection is and how much after top dead center you calculate, Start of Injection + time of injection = End of injection. e.g. -11°SOI (negative because BTDC) +20°=9°ATDC EOI.
This only applies to CR and PD engines. There is no "duration" calibration as such in VP pumps. Only pump voltage output, which adjusts the main metering valve in the pump (which in the end adjusts duration, but this is purely mechanical) - You are not going to calculate anything on a rotary pump.
What you will expirience if u add fuel without modding the boost map or the n75 is that you will have very high aggressive boost peaks on low rpm. this results in edc15 taking fuel out of the running engine to get the boost back under control
It NEVER does that. The only time you are going to have any fuel cut is when you are in limp mode from endless overboost. The ECU does not control boost by fueling period.
Also spooling the turbo up too fast will harm the turbo.
No, it won't unless you hit compressor surge, which you almost never do on a diesel.
Lots of misinformation in this thread.
