Comp 6465 Turbo spins and spins.

[keltalon]

I was installing a new radiator yesterday and decided to capture on vidoe how long my comp ct4 triple ball bearing billet wheel turbo charger spins after I turned off the engine. . This turbo is rated at 81lbs/min of air I am looking to push it to around 650 wheel horse power there are a few more upgrades in the fuel catagory that I need to acheive my goal. check out the video

<iframe width="425" height="349" src="http://www.youtube.com/embed/XyZnIz5RNPo" frameborder="0" allowfullscreen></iframe>

 

[Alex7747]

Dam Thats a sick ass set up man!! . Badass turbo too. Whats the spool on that thing??

 

[keltalon]

Dam Thats a sick ass set up man!! . Badass turbo too. Whats the spool on that thing??

Well I haven't had a chance to do any pulls yet with this set up. I had to do all kinds of crazy modification to get the ram horn to fit. Had to cut the wastgate flange and modify it. Had to cut the radiator brackets off the bottom and move them over. This allowed me to install a 1g aluminum radiator for the 2g upper radiator hose was hitting one of the ram horn tubes. Just got the radiator completed yesterday. Now the 2g fan will not fit there for I have to run to summit today and pick up a 13" slim fan. After the fan is installed I have to have this bad boy towed to have the down pipe custom fab to work with the new angle of the o2 housing. I would drive it but the exhaust angle is towards the radiator. All of this should be done sometime this week and when I get my injectors in I will hit the dyno

 

[dragonov_elite]

I would like to see how one of these does with a t3 twin scroll setup. But no option available :-/

 

[keltalon]

I would like to see how one of these does with a t3 twin scroll setup. But no option available :-/

I am still waiting on stuff to come in so I can see what it will do myself I live in ga it seems to take forever for parts to come from california

 

[HIGHPSI4]

Yea, my DBB 35R does the same thing.

 

[TurboDSM90]

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My 4094R does the same thing.....Especially when I rev it up to give it momentum, then turn the car off right away.

 

[keltalon]

finally got some log with this baby. This is with boost set to 32 psi untuned ripping third 3rd gear up. stock 2g mas clamped and cyclone intake manifold. wot pull towards end of log.

 

[tenn-gsx]

I have a comp CT3 frame setup. Mine spins for about 10-15 seconds from an idle. On a side note keltalon........ You sound COUNTRY AS HELL!!!

 

[pj91gsx]

I would like to see how one of these does with a t3 twin scroll setup. But no option available :-/

Theres no need for the t3 housings. Its a performance turbo they are made for big power. My friend is out of vacuum at 2500 rpm on his comp t67 67 67. He does have a stroker. Its rumor he makes around 800 hp but if thats true. His turbo is journal bearing. He also has a t3 housing that will fit it. Because the center section is a garrett turbine housings are swapable.

 

[keltalon]

I have a comp CT3 frame setup. Mine spins for about 10-15 seconds from an idle. On a side note keltalon........ You sound COUNTRY AS HELL!!!

Lol. Don't let the Alabama accent fool you. There is a big difference in me and bubba.

 

[Boosted98gsx]

I was installing a new radiator yesterday and decided to capture on vidoe how long my comp ct4 triple ball bearing billet wheel turbo charger spins after I turned off the engine. . This turbo is rated at 81lbs/min of air I am looking to push it to around 650 wheel horse power there are a few more upgrades in the fuel catagory that I need to acheive my goal. check out the video

<iframe width="425" height="349" src="http://www.youtube.com/embed/XyZnIz5RNPo" frameborder="0" allowfullscreen></iframe>

My fp 3582r HTA spins longer than that, and I don't have to rev it before I kill the engine.

just sayin

 

[keltalon]

My fp 3582r HTA spins longer than that, and I don't have to rev it before I kill the engine.

just sayin

Here we go .

 

[atownturbo]

Pics or it didn't happen. or video.

 

[keltalon]

My fp 3582r HTA spins longer than that, and I don't have to rev it before I kill the engine.

just sayin

So If I may ask what kind of numbers are you pulling and putting down with this thing By the way a smaller turbo will have the tendency to spin longer!

 

[big_d]

A smaller turbo with less rotating mass is going to spin longer? Please explain.

 

[keltalon]

A smaller turbo with less rotating mass is going to spin longer? Please explain.

It is not about rotating mass . Plain and simple the bigger your compressor wheel the more air it has has to move per revolution even when the engine stops the turbo is slowed by the weight of the air that it still is trying to move the smaller the compressor wheel the less work it has moving the air or for that matter the less air the longer it spins.

 

[big_d]

So your saying my 14b should freewheel longer than my wh1c does?

 

[keltalon]

So your saying my 14b should freewheel longer than my wh1c does?

Na. This information refers to a free spinning wheel such as in ballbearing units. I am not going to get into further debate on this matter of how long a turbo spins it's useless to performance I just though I share a little something with the fellas here. I am more concerned at this point what this bad boy going to do on the dyno. I will be dynoing this joker for one last time with the 2g mas and then will upgrade. I look to break the 600 whp mark with stock 2gmas, Cyclone intake manifold the underated not well spoken of Bc 280 cams and single jay racing fuel pump Stay tuned!

 

[pj91gsx]

its not always about wheel size, but points of inertia and wheel height.

 

[keltalon]

its not always about wheel size, but points of inertia and wheel height.

I agree 100%

 

[Boosted98gsx]

its not always about wheel size, but points of inertia and wheel height.

It's only about moments of inertia about the axis of spin damped by friction of the bearings (and of course the viscosity of the fluid mediums).

Also, consider this; If two ball bearings is all you need to axially support a shaft (since virtually no bending forces are being applied to the shaft), why would you want to add another friction adding bearing to the mix? It will only increase the amount of torque required to spin the mechanism.

Just sayin, "triple ball bearing" turbos are a marketing gimmick.

 

[tenn-gsx]

^ Marketing gimmick? Not true. The third bearing supports the middle of the shaft. Therfore stopping the shaft from flexing in the middle and putting a binding load on the end bearings during heavy load/psi applications. This allows you to use a smaller shaft with less weight on a heavier duty application. This flexing of the shaft is speculated(possibly proven not sure if it was proven or not but makes complete sense) to be one cause of failure in larger t3 turbos. IE. the 3575 turbos that just plain did not last long.

The 3rd bearing will ofcourse cause more drag than 2 but there are tradeoffs for everything in life.

 

[1997_GSX]

Why did you get rid of the 6265 you just got a few months ago?

 

[Boosted98gsx]

^ Marketing gimmick? Not true. The third bearing supports the middle of the shaft. Therfore stopping the shaft from flexing in the middle and putting a binding load on the end bearings during heavy load/psi applications. This allows you to use a smaller shaft with less weight on a heavier duty application. This flexing of the shaft is speculated(possibly proven not sure if it was proven or not but makes complete sense) to be one cause of failure in larger t3 turbos. IE. the 3575 turbos that just plain did not last long.

The 3rd bearing will ofcourse cause more drag than 2 but there are tradeoffs for everything in life.

The only forces exerted on the spinning parts (including the shaft) are torsion and maybe a normal force in the direction of the compressor housing (thrust). There is NO bending moment on the shaft because all forces exerted axially on the compressor housing are met by an equal and opposite force on the opposite side of the wheel. Thereby the center bearing is useless. Also, we're talking 1-2" between the outer bearings. Even if there was a bending moment on the shaft, it is more than supported.

triple ball bearing turbos are a gimmick