Well I am really gettin into BOMBIN now, I have been doin some research and tryin to figure out what kind of set up I want. I have read a lot of the post on this same topic on DTR, but I can't find what I am lookin for. I want to be in the 500s for hp and the 1000s for torque. I plan on runnin an ATS high performance tranny, bigger injectors. But I am not sure what size or brand. I want to run a bigger turbo, but I can't decide what I should go with as far as brand, and size. Lookin for advice and ideas. Thanks

 

For Injectors ...F-1, Mach 3's or 4's from Don M. Best quality control and performance on the market, IMHO, and on sale. See https://www.dieseltruckresource.com/...threadid=53935

Single turbos, at 500 hp on an automatic, all have issues. Either High EGT's or very slow to spoolup. Since autos need spool up...would recommend one of the B-1's. If money is no object...twins are the way to go. For B-1's see here; https://www.dieseltruckresource.com/...threadid=45038

You'll also need to address enhanced fuel delivery above 400 hp +/-.

Doing a search on these items will keep you very busy learning what you need to know for an informed decision.

RJ

 

get a high flow vp44, mach 3 or 4's.....twins or a b1 if you are tight on cash, get your comp sent in for the drag comp upgrade, and you will be well on your way

maybe even disregard the comp upfrade and stack it with a tst pm3

 

I have the money for twins, just wonderin if I would need them. I know I want them bad, but this set up would be goin into my daily driver. I want to keep my Comp. And I assume if I went with twins I would have to ditch my current exhaust, and my intake? I also plan on running the Air Dog fuel preporator. So would I need to upgrade to a high flow VP? Thanks and sorry for all the Qs

 

BDR,

Twins would actually make your truck a better daily driver with all the fuel you are planning on pushing. I see you're in colorado, what's your altitude?

 

Well Denver is a mile high, but my specific area which is the Denver/ metro area. Not sure what my areas specific altitude is. So I would actually get better mpg with twins, bigger injectors, and a high flow fuel pump? How does that work?

 

I agree with Transman.
At your altitude, twins would be a big advantage...more air to burn the fuel from bigger injectors! Example: I was recently in Colorado Springs...could only pull 41 psi boost on a turbo that, at home (650'), puts out 50 psi. Got a lot more smoke than I'm use to.

Better mileage, in my opinion, comes from what it takes to get a 7,000 lb truck moving. More HP is off set by using a lot less throttle. I have gone from stock to 460 hp...while my mileage has gone from 16 mpg to 18.5 mpg. Most of that gain was, I believe, from the engine breaking in at around 35,000 miles, but the main point is, on a diesel, you won't loose mileage by adding power.

IMHO, you do not need a high flow fuel pump for 500-600 hp.

Depending on how much boost your twins put out at your altitude...your next concern might be your head gasket.

Don't know the Air Dog system but you will need and want something to keep fuel pressure between 12-15 psi at all times, including WOT.

RJ

 

BDR,

The main advantage to twins is that when you modify the fueling of your truck past a certain level, you need to change the stock turbocharger to one that will flow enough air to keep your egt's in check, while still making the truck driveable around town--as you go larger with your single turbo, you also increase turbo lag, especially with a automatic transmission. I have a banks level 5 box (similar to edge comp box) and when I installed don m's mach 1.5 injectors with my hx-40 turbo, I had an awesomely fast truck, but couldn't stay in the throttle for more than 3-4 seconds. Anything longer than that and egt's were passing 1500 degrees. And I'm at 3900 ft. The solution is twins--they flow all the air without the lag. Hope this explains it better. I am by no means an expert in this area.

 

Twins work because the lessen the compromise between spoolup and airflow.

You can get a single charger to move as much air as a twins setup, but it won't spool.

You can get a single to spool like a twins setup, but it won't flow nearly as much.

Twins work because they split the work up. Each turbo has a lot less work to do, so it's much more efficient.

The small charger in the twins gives decent spoolup, but not as much if it was a single by itself.

The large charger in the twins gives great flow, but not as much as that large charger would do by itself.

These are the compromises. But dividing up the pressure multiplication into two stages offers a lot. In stead of one huge laggy charger trying to efficiently compress air 6 times, you can stage the turbos and have each one only compressing 2 or 3 times and have much better spoolup AND efficiency.

Every twins installation I know if that's driven "normally" has seen a MPG increase.

A good way to think of twins like an amplifier. Say your single charger makes 30psi of boost when it's fed air at atmospheric pressure (14.7psi). What happens to that 30 psi if you feed that turbo with 30psi instad of 14.7? How about 50-60psi? What if you feed it 45psi? You'll see probably 75-90psi!

Justin

 

Thanks for all you advice and info guys, it was a great help. I am plannin on also O-ringin the head and maybe the block. Might make a trip out if this, I am most likely goin with PDRs twin set up. So I might just take a trip up there for a couple a days and get the work done. Thanks again, this was exactly what I was lookin for in information. I have been doin a lot of readin here, did find lots of posts about twins. But none of them answered the Qs I had. Thanks again

The Air Dog is a lot like the FASS system. http://www.ekstamworldwide.com/lighttruck.htm

 

Just a suggestion; I would not ring the block. Should not be needed, is a lot more expensive (requires pulling the engine)...and is very permanent!
Jim Fulmer is at 804 hp with just the head o-ringed.

Having the head decked to as level as possible with a good set of studs is more important.
Recommend ARP Studs from Don M. See this: https://www.dieseltruckresource.com/...light=ARP+stud

RJ

 

Agreed. You don't want to ring the block-- do the head.

Besides, if you want, you can ship a head


JLH

 

Cool, that's what I decided. Plus I am lookin at stacks, maybe the slash cuts but I like the turn outs. Is there anything that makes 5" stakes better than a 5" straight out the rear?