Tutorial: tuning the 4D56 for more power.

[Growlerbearnz]

I think (hope) that's conservative.

Yup! I won't bore you with the math*, but I took the turbine's melting point (as per the article), multiplied by the turbine's tiny size (if you're pulling 1400F the turbine is probably spinning ridiculously fast), the age of your average Delica, plus the head's propensity to crack, and factored in the relatively poor airflow in the engine bay.
Then you add the consequences of a failed turbo (replacing a Delica engine is a bit more hassle than replacing a Dodge engine) and you end up with pretty much the same numbers as banks Power, just 100F lower. 1200F all day long vs 1300F. etc. YMMV. ;-)

*TL;DR: there's no math, it's just generic Turbo EGT guidelines minus 100F because cautious.

 

[mattyk2]

Would the lowered charge air temps provided by an intercooler translate to lower exhaust temps?

 

[Growlerbearnz]

Would the lowered charge air temps provided by an intercooler translate to lower exhaust temps?

Only at high boost levels. Below 10psi there doesn't seem to be much difference.

 

[The Delica Guy]

[Admin: this post shows the orientation of the splined IP accelerator shaft before installing the accelerator lever. Nice!)
I've installed so many of these 4D56 pumps, I made a photo guide as well. See the photo