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The triple ball bearing format is for durability, not to make it quicker-spooling.
Here are some things to understand about the differences in oiling during operation between a ball bearing and journal bearing turbo:
- Journal bearing turbos need a high flow of oil to support the shaft during operation. While the turbo is in use, the shaft floats on a pillow of oil and doesn't directly-contact the bearings or the housing....if the oil flow is disrupted, bearing and component damage can and will occur.
- Ball bearing turbos require just enough oil to lubricate the bearings during operation....a "mist" of oil is often enough to do the job, otherwise the cartridge can be drowned and turbo damage from inability to drain can occur.
Often you'll see guys posting videos of their ball bearing turbo spinning forever after the engine is turned off....this is because the shaft is fully-supported by the bearings and all times and doesn't need oil flow for operation. If it were possible to keep full operating oil pressure supplied to and flowing through a journal bearing turbo after the engine has been turned off, it would spin-down at a similar rate....but once the oil flow entering the cartridge is disrupted, the "pillow" of oil supporting the shaft goes away and the shaft slows down because of drag.
That in mind, I think the best bang-for-your-buck in a new turbo is right here...the FP HTA105: Forced Performance Turbochargers: FP HTA GT4205 JB Turbocharger
If you think the lag will be too excessive from the giant 76/105mm compressor, step down a notch to the 4294 (67/94mm) which is still 900hp-capable: Forced Performance Turbochargers: FP HTA GT4294 JB Turbocharger
900hp capable, fully rebuildable, and uses a Genuine Garrett cartridge for proven durability. If you oil it properly and treat it right, it will treat you right for years to come.
Told him this in the other thread.. I only run one of the fastest spooling 800+ whp turbos available though, so what do I know?
Useful only if you're completely unaware of who Innovative was. There's a reason that company is no more- they built total garbage.
Useful only if you're completely unaware of who Innovative was. There's a reason that company is no more- they built total garbage.
That he was. I'll let this prior post go ahead and "weigh in" for him.
After fixing a few other issues the main culprit and don't ask me why, turned out to be the POS comp turbocharger. the turbo is not designed right. Me and a buddy took the comp unit off the car and installed his used pte 6262 journal bearing turbo and man what a heck of a difference the car spools super fast and hits full boost 38psi around 5000rpm and pulls much harder than the comp 6765 unit that came off the car.
I am just totally shocked after almost a year of trying to work with comp on getting me the right turbine and compressor wheel combo for my set up and $2800.00 later just to fine out that their turbos suck. I ordered the new pte ball bearing 6466 CEA unit and will be installing it when it get in and my work load tapers off. I will post a overlayed dyno comparison sheet of the pte 6466 CEA vs comp CT4 6765 for the benefits of the boards.
Just a word of caution when purchasing a turbocharger do your research get on the other boards and read read read tract times look at dyno sheets talk to people who have used a certain brand of turbo and get their feedback and don't get caught up in what is advertised on some website, like I did, because some companies pay big bucks for advertisement design to overrate their products. Comp is certainly one of those companies.
