We all know the results of too high an EGT, but what would be the effects of running too low of an EGT with a lot of mods on normal daily driving?

 

Things last longer.

If very low EGTs were a result of decreasing fuel, then yup.

If very low EGTs were the case of a big-fueled, big-power ride, I'd say the turbo(s) were matched correctly for the given fuel. A good thing too.

 

So, at this point will turning the fuel screw in help or hurt my lag problem? It is to the old collar now.