Posted by Destroked 450 on September 30, 2016 at 09:11:25 from (173.242.142.14):
In Reply to: Turbo or not posted by Texasmark1 on September 29, 2016 at 05:07:58:
A smaller engine with turbo doesn't have the low rpm grunt a larger na engine has but once the rpm's come up enough for the turbo to make boost the smaller turbo engine will perform just as good.
Not sure if was the cooling system design flaw or engine performance issue but when the 4 cyl turboed JD 6400 replaced the 6 cyl na JD 2955 any owners in my area complained about over heating problems when under heavy loads. Many where claiming the 4.5 turbo didn't have the torque of the 5.9 six cylinder.
The last semi I owned (92 Pete 379 exhd) had the turbo replaced on the series 60 Detroit during it's first overhaul at 1.2 million miles.
Some of the loaders at a local mill have nearly 20k hours on original engines and turbos.
I upgraded the turbo in my pickup a couple years ago, this year the head gasket started seeping causing oil contamination which wiped out the turbo bearings in short order.
Oil changes and oil condition are the life of a turbo.
Seems like the smaller a turbo is the more it cost, I can get one for a semi for around a grand but one on a small economy car will cost 2-3 grand.
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