Demonstration of Precision Dual Ball Bearing vs. Journal Bearing

Showcasing the difference between two identical Precision 6765 turbos and featuring the new Precision Waterless AIr-Cooled Dual Ball Bearing technology.

Category:

Autos & Vehicles

Tags:

• reid
• sp racing
• sound performance
• precision
• 6765
• 67 billet
• billet 67
• dbb
• dual ball bearing
• ball bearing
• journal
• turbocharger
• turbos
• turbo
• pte

[1danvivaldi]

SupraExdriver that is what I said if u can read. I said other then quicker spool between shifts there is minimal difference. Second dbb are not more reliable and are a pain in the ass. Need to determine oil restrictor unlike journal bearing and cost of rebuild/ replacement of cartridge are all factors for why dbb not worth money. Of course you noticed a difference between a 68mm and 72 mm

[SupraExDriver]

@1danvivaldi I understood what you meant. My point was that the difference I saw going from a journal bearing to DBB WAS substantial and noticeable, therefore worth the money to me. I always tell people that DBB is awesome but if it's not in the budget, you'll have no problem with the journal bearing.

[1danvivaldi]

Other then a little bit faster spool between shifting the price difference and cost to rebuild a dbb turbo does not seem worth it to me.

[SupraExDriver]

@1danvivaldi You won't see a faster boost threshold (initial spool-up) with DBB. The difference is in boost recovery (from on/off throttle conditions or shifting for example) and the added durability. I went from a smaller journal bearing 68mm to my current Precision 72mm CEA DBB turbo and can definitely say it was worth the money!

[1danvivaldi]

Don't forget ball bearing turbos can't be rebuilt the whole cartridge must be replaced very expensive not worth the cash for minimal difference

[SupraExDriver]

@1danvivaldi DBB turbos can be rebuilt. You're referring to the Garrett small frame turbos that require the entire CHRA to be replaced should it need rebuilt. These turbos are rebuildable.

[danetp]

this is not a fair comparison. A journal bearing needs OIL PRESSURE to work. Its just like your mains in your engine. Not saying the journals are better than BB but its not that drastic of a difference

[TheAristotleQ]

Air cooled? Terrible, terrible idea for the majority of cars. You'll be coking up that oil really quick.

[1danvivaldi]

@ supra372r yes dbb is better tech but not 1000$ better tech. Second I can afford dbb turbos but choose not too because the knowledge and personal experience in the racing world, close friends experiences with dbb turbos ie cost of rebuild and no more durability then a journal makes dbb turbos not worth the extra $1000. Oh yeah I can afford several dbb turbos and could buy your mom, sister as well. But like dbb turbos hors are not worth the money cocksucker.

[supra372r]

@1danvivaldi

Didnt mean to curse @ you 1danvivaldi

[supra372r]

@1danvivaldi

Thats great! yes the DBB is more expensive! Yes the journal is good too, but the DBB is better technology!

Look 1danvivaldi if you cant afford the turbo..who the fuck care? Thats why you have the option to buy journal bearing.

For everyone else.. The DBB is worth the money!

IT COST TO PLAY...

I LOVE MY GT42 CEA !!!

[Gripmagic]

I'm sure its been said in the comments already but just incase, that turbo is oil cooled not air cooled . That's nothing new and is a downgrade from an oil/coolant cooled turbo design. That's how you build a cheap turbo, nice turbos have oil and coolant. also as someone else stated dry spinning of the shaft has no relevance whatsoever to the performance of these turbos in actuall operation.

[1danvivaldi]

Sorry supraex I meant to say that ball bearing can be rebuilt but the centre cartridge must be replaced this applies to most ball bearing turbos. The cost usually is $800 plus to rebuild as opposed to $300 to rebuild a journal bearing.