lincolnlocker
Well-known member
i have said the exact same thing for years.. i had that problem.. just a measly 200° rise in egt and i took soapy water to the entire charge side of the system and found my plenums to be leaking... twice... and i run my dually in one tune no matter what i was doing.. the hottest tune it has.. i could run a buck twenty with my 36 foot 5er on the back and just hit 1400°Its funny you mention this. I have been pondering this same thing.
SO MANY people have zero issues with the 38r (or variants of it). Towing with no issues and spools awesome. Then you have some guys that have EGT issues and say it spools like a turd... then they go T4, fixes all the issues, and they love it.
I have always wondered if when they go "t4" they fix all the boost/exhaust leaks because everything is brand new, which is part of the previous problem and now why they have zero issues.
I have never met anyone that has not had some sort of boost/exhaust leak when having turbo issues. If they ever stop by the shop it takes me about 5 min to find a leak (usually they have multiple leaks). These 15-20 year old truck parts will leak and go bad. It is funny because the most common thing I hear is "wouldn't I notice if I had a boost/exhaust leak"?
I just don't see it being possible that the performance of the box 38r can vary so much... it has to be tuning, health of truck, or leaks. But that is just a theory.
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