I would have to say either a 64 or a 66 Silver Bullet. My truck has dynoed at 663 a coupple of times and I have a 66. I do tow with it quite a bit and probably would have gone with the 64 but I needed the flow of a 66. Either or I would say is a good choice, and for all of you ATS lovers I guess the 5000 wouldnt be a bad choice either, that is if you can stand the whole ATS thing that s goes with it. ATS BOOOO

 

Whats all the hate for? You come into this thread with a chip on your shoulder about an SPS66 and hate on the Aurora 5000/or ATS? I dont understand that mentality.
I have used the SPS66 and it was a good turbo. I was forced to bump up to a larger turbo for what I was wanting to do because the SPS66 wasnt making the grade in the EGT or power department....
You could probably dyno what ever you wanted with either turbo but out on the dirt with a sled behind you the Aurora 5000 will put 10' on a 66 any given day of the week on a similarly setup truck.

 

**corected post**

ATS lists the CFM @ 1316CFM with the Aurora 5000.

http://www.atsdiesel.com/ATSWebsite/.../graph_a5k.jpg

 

I drive mine every day and pull 20k and have the 66 with no trouble but i do have alot of fuel

 

i think it's more then that right??

 

My truck weighs around 6,350 with me in it.. It's been shortened, has a fuel tank in back of the bed with a tonneau cover, and the most pulling I plan to do with it is a four wheeler on a little trailer.. The fuel isn't a question.. I just want it to be a decent driver, and a standout at the drag strip.. The Silver Bullet would be a great choice for it, though it sounds like the K31 type turbos would make better upper end performance and cooling.. Without the worries while towing, the larger charger seems like a decent choice for me..

 

the biggest problem with the 5000 is the exahust housing is so small it wont let out enough heat as the silver bullet will, but it will put more air in the motor than the SB so it's all what you build you truck to do. we build our trucks to get heat out of the motor first.......

 

Robert,

Too bad you dont live closer you could teach me how to build a truck.

Thats not the whole story Robert. Dont forget the A5k has a larger turbine wheel than the SB which also reduces heat, back pressure etc.
Everybody loves wastegates but the pluses of the A5k out weigh the pluses of the silver bullet for my truck. **Aurora can also be had with up to 4 different exhaust housings--Dodge small, Dodge large, Duramax, Dodge twins.

Here is an order of turbos and performance options and efficient capabilities (hp numbers are just for listing purposes):

Stock (375hp) 62mmI/54mmE
HTBG,S300G(425hp)58mmI/60mmE
HTB2/PS62,B104 (450hp)62mmI/60mmE
SPS62/ProStreet (470hp)62mmI/71mmE
PS64/KillerB2 (470hp)64mmI/60mmE
SPS64 (505hp)64mmI/71mmE
PS66/Sledpuler66 (525hp)66mmI/60mmE
SPS66/HTT66/71 (560hjp)66mmI/71mmE
SilverBullet 66 (575hp+)66mmI/74mmE
Aurora 5000 (600hp+)71mmI/76mmE
GT4294 (595hp+)70mmI
GT42102 (640hp+)74mmI
S475 (640hp+)75mmI

PS: Robert did you guys go to the truck pull @ TS?

 

ok but a bigger turbine wheel is useless in a smaller housing! thats why i said it does not get the heat out, they use a smaller housing to spool the thing--otherwise it would take a month to spool it..........im not saying it's a better or a worse turbo but making a valid point that some may find important, i think you can make more power with the 5000 but it wont get ride of the heat very well, just the opposite with the bullet, it will get ride of the heat better but will not cram as much air in the motor as the 5000----but thats why we use nitrous.........

 

Your wrong, try again....
If what your saying is true I would have popped a headgasket and blown a motor by now. I have 2 seasons of pulling on the Aurora so far....

 

you used to work for cummins, right? you sled pull right? then you should know that drive psi and cylinder psi is the only thing that will pop a head gasket, just because a housing is smaller than it needs to be doesent mean it will blown your motor up, it makes the probability higher, thats what im saying justin.

every one knows that when turbos are tested MOST are only tested on the output side to show CFM or HP #'s not the drive psi it took to get the out put that high! the silver exahust housing is 16 the aroura is what 14-15----guess that means you are closer than you think to a blown head gasket OR you just dont have enough fuel( injector size, programming.ect) to blow the gasket............ever thought about that. remember we put these theorys to work all the time and have never blown a gasket or melted an engine, everything we do is not just made up or "thrown together" but well Engineered and well Tuned.

 

Robert,

No, I have a job where I get paid to stir up trouble on diesel websites!
I understand what you are getting and am very familiar with what you are saying. If you read back a bit you will notice that I said wastegates are great.
But when you adjust drive with housing size/wheel size you are also getting almost the same effect, if not then any stock turbo for that matter would be just fine with a larger housing and a wastegate RIGHT?

Your truck could also use an upgrade to 71mm compressor wheel....II makes the SB with a 68 or 71 compressor wheel...just ask'em!

The Aurora has been around and in use since around 2002 or so with the Duramax and came on board with the Cummins around 2004...
So much for the "thrown together" or "made up" theory. I will say there are plenty of truck with the Aurora putting the power to the ground and testing "theory".
Sorry I dont have a doctorate in dieselogy but I didnt just get into diesel pickups last year or last week.

You guys really need to hook one of your trucks to a sled sometime and see some real egt's and load....until then your truck is just another dyno queen.

Robert, also lets be honest you guys are 100% pro industrial injection and thats fine, they make some good stuff but there not the only shop around.
I am not 100% or pro any shop out there. I use what best fits my truck whether I like the vendor or not...

I am not a dealer, have no sponsorships......zip, zero, nada.

 

OK...an A/R ratio is dependant on the size of the Wheel AND housing...it's a relationship!

A 76mm turbine wheel, like the A5000, will move more air in a .80 A/R housing than a 73mm in a .80A/R housing, and drive harder too. BUT it (the 76mm) will spool a bit slower!

Your argument sounds like just becasue it's an II charger, and your an II dealer, it's better!

I don't think Justin has ever blown a HG on this engine, nor melted it...and I'm sure someone has checked drive pressures on an A5000. That charger will, hands down, make more power than a Silver Bullet. Timinva did it on the dyno, and Justin loves his in a sled pulling application.

Chris

 

Ding ding.............WE HAVE A WINNER!!

You read my mind.

Robert,
You know now that I think about it a bit II used a so called "phat shaft 71" which was basically a K31 (sound familiar?)Performance with a T3 housing on Greg Hogue's COMP461's old drag truck. They also had a divorced wastegate and ran spray on that motor...
If the NGM truck is such a powerhouse I would have thought you guys would be running something similar because even II thinks the K31/Aurora 5000 is a superior setup....PROOF was on GREG's DRAG TRUCK!! You want a picture it was in DIESEL POWER MAGAZINE!!!!!!

 

Yep...My Garrett has a 77mm wheel in a .85A/R housing...it cools VERY well, but doesn't spool near as good as I hoped! I'll bet drive pressure at 42psi is pretty good too, but I haven't rigged the gauge yet!

Chris