Originally Posted by stcctln

Hollo ,I`m allmost done turbocharging my daily sierra.
I`ve build my own custom exhaust manifold,downpipe and an inteke elbow in wich fitted 2 200cc injectors.
2.0 Dohc non cat. It`s running at 5 psi.
It is working allmost ok,i have some small isues but nothing to bad.

I need some advice.

What sparkplugs should i use?
At this pressure do I need to use an intercooler?
Do I need to chenge the oil type?10W40 running now.
Maybe bigger oil filter?


Tnx.