Upgrades and Aftermarket - 99 & up 7.3L EngineUpgrading or adding OEM or aftermarket equipment to your 1999-Up Super Duty or Excursion with 7.3L Power Stroke diesel engine. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.
Nobody here is an expert, so NO INSULTING REMARKS. What turbos are going to make the most efficient, broadest boost range, flattest torque curve, and lowest temps with boost up to 105psi. That 115 is just an iffy max number for head studs and o-rings.
We need boost coming on early and staying with the program right on up to 105psi without spikes or dips.
Let's hear it- it's all opinion at this point so nobody needs to get bent, but lets talk brands and model numbers. Anyone have any ideas? How about a single charger that can be used as the high pressure charger later on?
a GT-60 is HUGE!!! and very expensive. I would try and H2E and HT4b combo. Neither turbos by themselves are that pricey and with the exhaust housing choices for the HT4b as small as .78, spooling up that bad boy shouldn't be a problem. Anyone got any opinions on this setup???? The parts for a H2E conversion are readily available and it has proven to be a pretty reliable single on our trucks, unless you roast one on a dyno like Dockboy). That is the direction I'm leaning at this point. Or maybe something in the Garrett line, GT40 and 47?
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1999.5 F350 CC LB AT 4x4 Dually, Burgundy/Black, MBRP 4" Stainless exhaust, IssPro gauges, Jody Tipton 4 pos chip, BB Turbo, Big ol' hybrids, DI stainless reg return, Not Big oil but let's call it "MEDIUM" oil for now 140,000 on stock tranny b4 she puked, BTS in its place
Is there a website that has compressor maps available for the turbos mentioned? I'd like to be able to see just how many pounds of air mass these things move and what their efficiency range is.
Clam, the garrett website has compressor maps on it.
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1999.5 F350 CC LB AT 4x4 Dually, Burgundy/Black, MBRP 4" Stainless exhaust, IssPro gauges, Jody Tipton 4 pos chip, BB Turbo, Big ol' hybrids, DI stainless reg return, Not Big oil but let's call it "MEDIUM" oil for now 140,000 on stock tranny b4 she puked, BTS in its place
but I can also tell you this...... you are going to have to work on fuel first........ I am confident that NO one (well 1 maybe) can give you the fuel you need to make those kind of numbers.......
Wacker
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"If your talkin' bout me.....your leavin' somebody else alone.
Rather than asking what turbos people think will work, how about doing it the other way around.
Engine displacement: 444 in^3 = .257 ft^3
RPM = 4500 (I don't want to try for 105 psi much lower that that.)
Volume air required per 1 engine revolution = .1285 ft^3
Volume displaced per minute = 578 ft^3
Pressure Ratio at 105 psi = 8:1
578 cfm * 8 = 4,624 cfm into the inlet of the big turbo.
Run big turbo at 4:1 pressure ratio taking in 4,624 cfm and out comes 1541 cfm at ~50-55 psi or so.
Stuff 1541 cfm into little turbo running 4:1 pressure ratio and out comes enough air into the engine to make some boost.
My turob book seems to have grown legs and walked out of the shop (or maybe it blew an intercooler boot), so I may not have my pressure ratio vs cfm numbers quite right. The cfm numbers seem too big. [img]/ubbthreads/images/graemlins/confused.gif[/img]
Now for the turbos....a hybrid HX50/60 is good for about 1400-1500 cfm, and we've made 550 rwhp at 57psi on one, but I don't know anything big enough for the big turbo.
Now for the fuel...4624 cfm * .080703 lbs/ft^3 for air at STP = 373 lbs/min
Run a 20:1 air fuel ratio so it doesn't smoke too badly and you'll need 19lbs of fuel per minute.
Maybe some Mini-Me's? [img]/ubbthreads/images/graemlins/shrug.gif[/img]
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Jonathan
The Swamp Donkey: 1995 F-250 4x4 with 2.5 ton military drivetrain, 49" 14.00x20 Michelins, dual 5-speed trannys feeding NP-205 X-case and 1410/1580 U-joints. Engine & trannys are out getting rebuild #2...hmm...I wonder what I can do to it now?
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but I can also tell you this...... you are going to have to work on fuel first........ I am confident that NO one (well 1 maybe) can give you the fuel you need to make those kind of numbers.......
Wacker
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Fuel? That's easy. The next question would be do you have enough oil to run the injectors? I didn't think so! [img]/ubbthreads/images/graemlins/biggrin.gif[/img]
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but I can also tell you this...... you are going to have to work on fuel first........ I am confident that NO one (well 1 maybe) can give you the fuel you need to make those kind of numbers.......
Wacker
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Fuel? That's easy. The next question would be do you have enough oil to run the injectors? I didn't think so! [img]/ubbthreads/images/graemlins/biggrin.gif[/img]
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Ok OK I guess I should have said fuel (properly done that is, not with your garden variety bench sander, and such) You know injectors that will not dump so much oil they cant keep up, as well as ones that actually idle like stock........... It can be done.
Oh oh but I have the decoder ring [img]/ubbthreads/images/graemlins/biggrin.gif[/img]
Wacker
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"If your talkin' bout me.....your leavin' somebody else alone.
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but I can also tell you this...... you are going to have to work on fuel first........ I am confident that NO one (well 1 maybe) can give you the fuel you need to make those kind of numbers.......
Wacker
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Fuel? That's easy. The next question would be do you have enough oil to run the injectors? I didn't think so! [img]/ubbthreads/images/graemlins/biggrin.gif[/img]
[/ QUOTE ]Geoff, care to elaborate? To this date there is NO injector requiring more oil then a dual pump set-up can't feed. Unless your talking about a poorly built injector. [img]/ubbthreads/images/graemlins/shrug.gif[/img]
__________________ 95 F350 Crewcab4X4: TE Twin Turbo(BB fed by a Precision Hybrid from BWD), Industrial Injection BD Injectors, DIIC with custom stainless 3" piping, Terminator HPOS, DI headstuds, BTS tranny, TruCool 40GVW cooler, DP LIVE TUNED F5 with Extreme ICP(ya, it works)!, Custom fuel system, MagHytec diff cover.
01 F350 Regcab4X4: soon to be shortened.
97 F350 Regcab4X4: Twin Turbo's, lots of fuel and oil.
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