ctommer

Finally getting back to you all. I ended up installing a set of stage 3 injectors and ran it for a couple of days with the stock turbo Wow lots of smoke, even though boost gauge snaps to 36psi. Heated too fast, to 1100 on the flats. Then installed a turbo from Rochester. WOW lots more smoke and less boost, only 30psi. I thought I made a mistake doing all this. Then I adjusted the waste gate so I get 40psi. I have hauled numerous loads from 175,000 to 240,000lbs. It's nice when the ambient temps are below 50 degrees Fahrenheit then you only have to watch the pyro. But the last couple loads it's been 80plus degrees. Water temps are out the roof!! Even with the fan on 100% of the time. I have removed the intercooler and radiator and pressure washed both, still water temps are high. Does somebody make a bigger, thicker radiator???? So far very happy lots more power just need to figure out the cooling. Hopefully I will get by the dyno shop in the next 30 days then we will find out the exact improvement.

Thanks for your responses. Took my truck and had it dyno'ed today at caterpillar to know where we are starting with the stock injectors. 4 pulls with the highest HP at 389 to the ground. The guy told me to add at least 15% to that number to get to flywheel HP... So 446-460 HP. Should get new injectors in 2-3 weeks then we will try it again. Might need upgraded turbo???? Will see. FYI gauges are reading.... Pyro never above 825. Boost 30-32 psi.

I have 1999 E7 460. I just ordered a set of 20% oversized injectors, wich should take me to 550 HP. Has anybody else done this???? I know with more hp comes less life. I am looking for real experiences with this set up. Good / Bad, failures ect..... My truck is set up as a lowboy truck. 12 axles empty wt 70,000lbs Loaded wt 170,000-230,000lbs. 460 hp has worked for the last 250k miles but just looking for some more. Thanks in advance for any responses.