Quote:
Originally Posted by Donovan34
What was so bad about the journal bearing turbo. And how's your kit holding up anything I should know about it.
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It burns quite a bit of oil, and the transient throttle response leaves much to be desired. It's a small turbo, so the boost threshold is pretty low (About 3,800 RPM/ 4K depending on scenario)....it is very responsive in that regard. But, on/off and off/on throttle sweeps it feels very slow to respond and robotic. It's a hard feeling to describe, and it can't be quantified in numbers or on a dynograph. Here are a few different 'behavoirs' it exhibits that might give you an idea of what I'm talking about
-3rd or 4th gear maybe, driving at normal road/non-highway speeds of 30-45 mph. If someone pulls in front of me which requires stabbing the brakes or letting off the throttle....it feels like all of the wind is blown from the sails and it takes a few solid seconds of gradually easing back into the gas pedal in order for it to pressurize the charge and for it to have any balls
-Slow shifting, you have to shift fairly fast to keep the car in boost or else it will lose it. A ball bearing turbo is able to 'recover' from this much quicker than JBs.