hahah, just didn't want anyone getting confused...although I may have worsened it

 

Is the silver 62 noticeably better than the Phat Shaft 62? My tow truck is an 8,040 pound 2005 dually that ran 13.04 at 103 (8.2 eighth mile) with a BDDL, 90 hp DDP injectors, II PS62, and full trans.. It's a very simple combo. I'd like to get in the 12's consistantly without twins, nitrous, or water meth. If the silver spools even quicker, it could be the ticket..

 

So we got inducers, compressors and exhuast housings, correct? Isnt that the 3 main things to look at when trying to choose a turbo?

Also any input on where to set the boost level at for a 62/14 on an 05 with factory studs?

 

Is your PS52 a PS62/14 or 12? The Silver 62 is virtually the same as the SPS6280 (62/14), as far as performance...just with one more blade on the turbine wheel which probably barely is noticeable on spool. If you have a PS62/12, the SPS6280 or Silver 62 will spool later, but make power power on top. Not sure if that will be what you need to break into the 12s or not. NICE numbers by the way....those numbers make me envious of you auto guys...untill you have to drop $5k on a fully built tranny...then I'm happy running slower e.t.s

 

Well, kind of. Inducer is the term used to describe the inlet of the compressor wheel, not an actual separate part. A turbo consists of compressor and turbine wheels which have different trim and/or diameter listings, compressor and turbine housings which have different A/R (area to radius) ratios, internal and external wastegate designs (I have never seen an external wastegated diesel application), and a CHRA which is your center section which houses the main shaft and bearings. That's GENERALLY speaking when referring to a turbo.

As for a safe boost level, I have always heard 50 psi, which I am going to keep it under to be safe until the motor gets ARPs. I am dreading that install, otherwise they'd already be on.

 

Thanks Rob, my turbo knowledge leave a little to be desired but I would like to learn as much about them as possible. I know a little about differant turbos in particular but I would like to know more about turbos in gerneral.

50 psi is what I have heard too, so I will prolly set mine at 45-48. If it can hold that much I dont know if 55psi is worth the time and $ for studs. I mean how much of a diff does 7-10 psi make on a charger that size and at those boost levels?

Now if I was gonna do some type of drugs then I may consider it but if I am gonna shell out the $ for studs I think I would have to anty up and get a bigger turbo to make it feel like it was worth my time and money. JMO

Maybe that is the excuse I am lookin for so I can get a big fat single like cquestad.

 

Well, I am hitting the dyno tomorrow with the truck, and I just gave the actuator another 1/2 turn, which should give me a MAX of 50 psi, which is only going to happen in 5th and 6th gears. With the 47ish max I was seeing before, it was only for a quick instance in high gears...not 2nd, 3rd, or 4th, and usually was only 45 psi even in 5th and 6th. I'm currently transferring the wild tq management smarty file for aftermarket turbo and stock injectors onto my smarty. I'll be comparing the Crazy larry tune to this as well and see who comes out on top...both will be stacked with the MP8, which I need to vary adjustments on as well. I report back with a new thread on Thursday. Maybe those numbers will help you decide on which turbo to buy

 

Once again, awesome! good info....i'm looking forward to the thread thursday.

 

Rob, I bet I am just about as excited as you are for you to get on the dyno.

Except for the tst you have almost exactly what I will be runnin. Differant trans and you have an intercooler but I will have the same turbo or better and there will be a DL in my future too.

Let us know as soon as you can on your numbers.

 

I was talking about the turbo not the manifold.
that's why I added the photo of the turbo's with that post

 

Well, I only have the dyno files in .drf format, which I don't have anything on this computer to open them with. I am going to try and get them as screen shots in word or excel tomorrow so I can analyze and post them.

BUT, if my memory is correct, here are the numbers.

We had to load the dyno using the brake at low RPM before the pull to try and gain some more boost. I still could only get 41 psi MAX when the truck is hitting nearly 50 on the street. Without loading the motor using the dyno brake before the pull, I only saw 38 psi! With the Bully Dog, the truck made the most power...crazy larry... 519 HP/954 torque. With the smarty on the "wild program" with SW9 it made less... I think it was 510 HP/935 torque. HP is great, torque was lower than I was hoping for. My first baseline pull was with a low smoke smarty program on SW9 and it actually did well... 505 HP/920 tq, but the torque signal was lost for the peak torque section of the pull (due to the torquing over of the motor, the signal just barely was lost, then regained). Where it came back on it made 920 ft/lbs. That was WITHOUT loading the motor and the MP8 at 50%. The other power numbers were with the MP8 at 75%. With the MP8 at 75% on the other tunes (crazy larry and SW9/Wild) without loading the dyno only resulted in 500ish HP and 890ish torque!! Since I showed up w/ the low smoke program to begin with an I only had the wild tune installed waiting to test on the smarty, I couldn't go back to this tune until I got home . I think if I bumped the MP8 AND ran the low smoke smarty program while loading the motor before the pull I would have seen 520+ HP and closer to 1000...but I doubt I would have crested it.

Anyway, not bad....I am not too disappointed I didn't hit 1000 ft/lbs, mainly because I was running 9 psi less than it sees in 5th gear on the street. With 50 psi on the dyno, it might have hit the 1000, especially considering it almost made 520 HP.

 

looseboltsrob you have a very clean truck. I think those numbers are good considering not having a tst stacked on the combo those numbers are real good.

 

I am pleased with your HP numbers but you are right that does seem a little lower than I expected in the tq numbers.

Either way good work and now you got a starting point to build on.

Keep it up.

 

if Crazy Larry makes 519hp, I wonder what Scary Larry would do?


once again good write, nicely done!

 

The next time on the dyno, make sure that after they strap you down that you warm up the tires real good, then have them retighten straps,, the problem with alot of dyno operators that dont do diesels often dont realize how the torque will let the tires slip on the rollers real easy

Kevin