Quote:
Originally Posted by heavyhaulerss
yeah , I was thinking the same thing . everything on my truck seems to last more than double the life expectantcy. 1.1 mil before original clutch was replaced. I had in mind, based on past info of turbo's not lasting long, to buy a new one, but keep my old one in my side pocket in case new one went out sometime later. I know the turbo's on the 500 det were blowing like crazy about 5-6 years ago, but was told it was a defect by the turbo mfr, not the truck as people at that time were thinking, cause the 500 det was new on the scene. mine is a garrett. I have heard folks say get a high performance turbo, for more power & better m.p.g. some spool up faster, have less back pressure. though I have no idea what this means.
Anything that moves/rotates has "inertia" to overcome. When you step on the throttle, there is a "lag time" before you actually have the turbo spinning at top speed, and building up max pressure. That "lag time" is when the turbo is "spooling up". As for the back pressure, the more back pressure you have, the less horsepower the engine is able to develope. One of the reasons so many guys go over to straight pipes. No baffles in the exhaust means less back pressure, and more horsepower. That translates into better fuel economy. So, a turbo that "spools up" faster, and gives you less back pressure means less fuel to go the mile.