1200 plus if you lay into it, that is pre turbo temp by the way. I used to have a Nissan SD33T in a Scout, they are IDI and would melt down at 1200 plus for any length of time. It doesn't help that I am at 8k feet above sea level and UP, density altitude can really get you if you don't pay attention. I am going to have a back pipe bent up at 2.5" diameter, and I run no muffler. Try that first, see if we can get the heat out quick. Then a bigger intercooler. I need to put a pre turbo temp and pressure guage set on to get accurate data.