+- STD (https://www.superturbodiesel.com/std)
+-- Forum: Tuning (https://www.superturbodiesel.com/std/forumdisplay.php?fid=6)
+--- Forum: Engine (https://www.superturbodiesel.com/std/forumdisplay.php?fid=7)
+--- Thread: 300SDL turbo upgrade to 350SD (/showthread.php?tid=6036)
300SDL turbo upgrade to 350SD - natew - 12-08-2014
I need to get a new turbo so I'm going to get the 350SD turbo and exhaust manifold. I'm going to have James @ Performance Techniques rebuild and put a 60 trim in it.
Will this setup work with my stock 300SDL injection pump and not frag the engine? I have not modified it. I did remove the alda, egr, and smog stuff under the airbox. I know without the alda I have no overboost protection. I'm more concerned about running too lean.
RE: 300SDL turbo upgrade to 350SD - Petar - 12-09-2014
(12-08-2014, 05:54 PM)natew I need to get a new turbo so I'm going to get the 350SD turbo and exhaust manifold. I'm going to have James @ Performance Techniques rebuild and put a 60 trim in it.Yes, it can't harm the engine. Although it may have a bit more turbo lag.
Will this setup work with my stock 300SDL injection pump and not frag the engine?
Quote: I have not modified it. I did remove the alda, egr, and smog stuff under the airbox. I know without the alda I have no overboost protection. I'm more concerned about running too lean.First things first FORGET everything you know about gassers and their air fuel ratios.
Diesels just don't work that way.
Diesels ALWAYS run lean. Air intake is not throttled. The engine always takes maximum air. Diesels usually run at lambda=18 or leaner at full power and much leaner at part throttle.
Basically how a diesel EGTs work is:
More fuel for the same air --> higher EGTs
Less fuel for the same air --> lower EGTs
If you install a bigger turbo and add more boost you won't raise the power unless you also increase the fueling.
RE: 300SDL turbo upgrade to 350SD - ccrelan - 12-13-2014
My friend is selling a 3.5 turbo manifold and turbo on ebay now