Ball Bearing Turbo temps? vs journal temps

[Clark6]

since the bb supposedly spins faster does that mean they create more heat than a journal bearing turbo is that why they added the water coolant lines?

i noticed my bb turbo on the cold/compressor side is even warm,,no.. kinda HOT. i dont think the 44 got that hot (std brg).

 

[LOLGN]

The ball bearing turbo isn't going to spin any faster than a journal bearing turbo, it just has less friction so it will spool up faster.

 

[GNVYUS 1]

+1,

Now if you asked about the water cooled turbo's you can make an argument that the water helps take some of the heat out of the radiating exhaust housing over to the comp wheel.

 

[Clark6]

+1,

Now if you asked about the water cooled turbo's you can make an argument that the water helps take some of the heat out of the radiating exhaust housing over to the comp wheel.

Thats exactly what it seems like mines not that hot on the exhaust side but it is hot, but the comp wheel is a little hotter than my old 44 it was actually cool on the comp side after riding around town this one however is hot after riding around town.... (im breakin my new engine in:biggrin: and were just wondering.)

 

[nuclearxp]

It probably feels warmer because, as everyone stated, BB turbos spool faster. While it may not spin faster (RPM) wise than a journal bearing turbo you must realize that, on average, the turbo is spinning more overall revolutions in a given timeframe than a journal bearing turbo because it is reaching it's peak RPM sooner than it's journal bearing counterpart. Consequently, a turbo that rams more air in the motor faster results in more exhaust pressure and higher temps, which aid in the heat soak to the compressor side.

 

[cool 84]

It's all in your head...