I was curious to the s256 as well. NMB2's reply was that it is the same as an aurora 2000, which when I looked that up it was a direct replacement for the 093. However, just googling S256 shows results for something physically much larger and more appropriate as an upgrade for cummins pullers. There's more here I think we're missing, like specific housings and whatnot.


I would also be interested in how the second gen PSD turbo stacks up. For some reason I keep thinking that the first gens were non-wastegated, is that correct? At any rate if someone is interested in budget builds, the second gen turbo seems to come available used more frequently, at least around here they do.

 

Yes the first gen turbo was non-gated. The second gen is though. There is actually a guy named Roraryboots that has one on his truck. It does decent from what I have seen. Also I think Racin put a map of that turbo up in this thread...

 

Well, I am a former 2.3T guy...I think you need a fairly serious 2.3 to get the potential out of a 60 trim. Although, I had a 57 trim on my Turbo Coupe and it was a BEAST with that thing, crappy map or not! And that was at only 17 psi with stock injectors.

I was just looking through lots of maps back when I had my truck because I wanted to try a turbo upgrade. The 60 trim looked almost ideal for something in the 10-15 psi range.

But, another issue is that there's no way of fitting a T04E compressor housing with the turbo in the original location of a 7.3 IDI factory turbo, it hits the intake manifold. You COULD have the original compressor housing machined to fit a T04E wheel, though, as I was told by a turbo shop...

 

That was a first gen map. For some reason I can't even find the model of the second gen turbo...

 

Something ive thought of before. The reason ive always been under the interpretation that the genI psd turbo is "junk" is because of the non gated exhaust housing and 1.1+ AR. Obviously i havent looked into it, but i wonder if there is a better turbine housing available. For intance like a 14cm internal gated .8- AR T3 flange, or somethin like that. Would get rid of the funky flange, make it spool decent and weve decided it has a good comp map. Still have the wonky center section to deal with but it seems people have found ways to deal with it. Just thinkin out loud here, someone let me know what they think. We have a 97 psd here on the ranch and its a turd until about 3k and the turbo finally spools.

 

I think you are right. Lag is the real big issue with that turbo. If it could actually spool, it could easily make 350hp I would think...

 

there is a smaller exhaust housing for the stock obs psd turbo. not sure what size it is but it seems to be a pretty popular mod for those guys and helps with spooling.

EDIT; they use a 1.0 housing for faster spool.

 

Been busy trying to answer my own questions from post #45... so in case i'm not the only one needing the answers, here are some good links for understanding turbo basics:

Good explanation of wheel trim, how to calculate it and how it affects performance:
http://www.turbobygarrett.com/turbobygarrett/wheel_trim

Good explanation of housing A/R, what it is, and how it affects performance:
http://www.turbobygarrett.com/turbob...housing_sizing

Another site that covers trim and A/R less-well than the Garrett site, but has really clear diagrams and measurements of T3, T4 and T6 flanges, plus info on turbo cam characteristics and some charts to help choose a turbo for your specific application:
http://www.forcedinductions.com/help.htm

I know this is pretty basic info., but since this is a "resource" thread maybe there are other readers that may find the links helpful...

EDIT: another useful link for turbo glossary definitions:
http://www.turbodynamics.co.uk/techn...k-definitions/

 

ATS is not very forthcoming with details about their turbos. Seems the S2000 is no longer in production, but still e-bay available for about $1,250. Not sure what the difference is between the S2000 and the S3000, but the latter seems interesting, but expensive at $1,500-ish new.*

Aurora S3000
Compressor = 57mm x 84mm
Turbine = 73mm x 64mm
Housing = .85 T3

Tests say it is superior in every way to the HX35, but that's on a Cummins application. Would like to know how it did on an IDI before dropping that kind of cash.

This is tempting, but I'm still not convinced i know enough to say it's my best option for the $ and buy it...
ATS Aurora 3000 Turbo Ford 6 0 Powerstroke | eBay

 

I really wanted to write more than this tonight, Ive been reading your guys posts all day, I just dont have time... Ill elaborate more tomorrow if I can get a spare minute.

But shortly, I really like the Aurora 3000, I think it would be the ultimate turbo for the IDI. It flows enough to make 500whp on a diesel, and is small enough that it lights faster than an HX35 on a cummins... I really want to try one, and If I can get my hands on one for a decent price, I will do just that. In conversations with NMB2, we both think it would be a direct bolt on, the only issue is price... But if its as good as a turbo as it looks like it could be for any IDI... It just might be worth the price...

 

annnnnnnd, this thread was were this time last year? LOL

 

I don't know Racin'. I was thinking the same thing and had my mouse over the "buy it now" button a few times because of the price, It's just a big risk not knowing what it'll do on an IDI. The Cummins crowd loves it, but the 6.0L folks not so much. Odd how so few PS guys are getting this turbo, and the ones who did buy it are mostly not happy with it. The eBay seller in my last post claims he is upgrading to a "bigger" turbo, that's why he's selling. Maybe. At 46K miles on it and wanting to support more that the Aurora 3000's 500 hp, I'm thinking it's not working out for him. I know the Cummins vs. 6.0L vs. IDI are 3 completely different engines, all I'm sayin' is I'm not counting on it being as awesome as it is on Cummins. Here's a taste of what I've been reading:

ATS AURORA 3000 - Diesel Forum - TheDieselStop.com

ATS Aurora 3000 - Ford Powerstroke Diesel Forum

Who knows, might turn out to be a ~great turbo for the IDI, but even at 1,000$ for the used kit, that's a lot of cash just to try it out. If the PS is struggling to spool it up well, given that they have way more fuel than IDI, I'd be much more inclined to try an Aurora S2000 instead. Also very interested in that BW S259 high flow, fast spool unit from Boostlab. If you have different info. let me know... hopefully before auction closes, but if the 6.0L guys are needing to throw more fuel at it to get it to work right, does not seem like a great fit for a 90cc IDI, no?

 

I sell a ton of A3K's for the 7.3 and it works awesome. I use .85 housings on it, as I do the 5.9.

The 6.0 has such crappy flowing heads and low displacement that you have to use a .76 housing on it to get good spool from it, and this cuts out on top end power.

500rwhp would be stretching it to its limits on an IDI.... 450rwhp is more in the happy range. My turbo with the new exhaust housing is essentially our new A4k.

 

I think two things you have to look at the CR of the IDI at 21.5:1 and the displacement difference. With the high CR you will get a lot more drive pressure especially at low rpm than a 6.0l. I have seen some video that ATS had with a IDI and there Arora 3000. I was pretty empressive clip of sled pulling. just my two cents.

 

Thanks. Poor heads must be the missing piece, as displacement basically the same as Cummins. I couldn't figure out why it wouldn't spool well, but that's a plausible explanation. I'll see if I can find more info on what it's like on a 7.3 PS, I still think it might be "too big" or at least "overkill" for the engine I'm building, but it sounds like it ~is good for the IDI in general.

Do you know where I can find specifics about the discontinued Aurora 2000? I still see them on eBay, and I'm interested in them. Not to save $$ over the A3000, but to bring best spool down into the peak torque range like I see with the BW S256 map. Any idea if there are turbo maps for either the A3000 or A2000? Is the A3000 a replacement for the A2000 or did ATS just drop the small one? Is A3000 a BW S200 platform, S300 platform or other? Sorry, probably asking things you may not be allowed to talk about, but if you can...