Just to be clear again, I did try to buy the compressor upgrade from KC, the price was right and they appeared to be a place that could support the product if I had a need. But, they did not have it. I bought it from a store ( TurboLab) that had it but at a higher price that likewise seemed that they also might be able to offer support if needed. Since this seems to be issue, I hope this clears that up.
About my truck, earlier this year I noticed lower hwy performance while towing. Reduced passing ability at 60+ mph, and lower performance on grades. I installed a monitor to clarify things and first thing that popped up was an EOT/ECT issue. While fixing that, OEM oil cooler, BP EGR
cooler, ect, I installed a turbo rebuild kit. I suspected the unison ring and vanes but mine turned out to be good. After the work the cooling issues were fixed but boost was the same as was the performance. Still 17-18 psi
. Other things that I did later included cat
delete, new ERG valve o-rings CACC tube boots on hot side.
Lastly, I installed a coupling on the turbo inlet and capped off the exhaust tail pipe end and with and air line from a regulator set to 15psi, I pressured up the intake and exhaust systems and sound and bubble checked everything that was under pressure (pretty much everything). In addition to 2 small bubbling leaks on dr side exhaust manifold (which I judged to be insignificant for immediate fixing) there was a significant sound and bubble leak on the compressor housing which had a new o-ring. I figured that this leak must have been there all along since the performance was the same. Weather or not this leak is the cause of the low boost and performance, I donít know, but it was big enough that I thought it should be fixed anyway. After the whole system test I isolated the intercooler and pressure tested separately with non flowing air, no leaks.
So I ordered the upgraded compressor housing and after I receive and install it I will know.
Other things, 6.0 , 2003, 147K, no tuner, owned since new, 2wd, auto trans.
Some of the things I have done have improved the driveability, which sometimes suffered with slow response, but not the ultimate pulling power.
What did I want? I hoped that someone might have had a similar issue and some comments on how they solved theirs, or least some idea. Still all I know is that I bought my stuff from the wrong guy. So, can you help me even though I am a sinner?