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10-10-2010, 06:28 PM
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#1 | ||
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Registered User
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bigger turbo higher egt
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10-10-2010, 07:36 PM
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#2 |
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Registered User
Join Date: Jun 2006
Location: Thamesford, Ontario Canada
Posts: 1,288
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How much boost are you pushing out of the new turbo compared to the HY? Seems to me like boost is a lot lower, or it's taking too long to spool, causing higher EGT's.
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2001 Dodge 2500 4X4: Goerend, TST, Smarty, MVP, BD Rad, Injectors, Two Turbo's, Snow Performance, Supporting Mods... 12.7 @ 108mph Aug 2011 |
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10-10-2010, 08:40 PM
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#3 |
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Registered User
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The hybrid has a bigger compressor wheel & housing and a bigger exhaust housing. Because of this, it requires more exhaust pressure to spin up enough like your HY35.
This can be accomplished with more fuel/bigger injectors but the exhaust temperatures will still be more than you had stock IMO. With your stock injectors and module, I believe a stock HX35 would've worked better. My hybrid worked real good with 100hp injectors but you'd most likely need to upgrade the transmission to run them. A turned up Cummins can break transmissions/clutches.
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'01 2500 4x4 Red QC Sport HO SWB, 6spd.,cowl hood, 4" ex., Comp wire tapped, Banks boost & pyro pillar mount, single Holley style lift pump, US Gage & 5 grease gun lines for fuel pressure monitor, B20 or Power Service in the tank, Amsoil in the trans and Valvoline in the pan, Vulcan Big Line kit, 13psi WOT on 5X5, BHAF, cheapo fuel cooler, IP 200 injector nozzles, Cat C300 62-65-.70A/R What's yer lift pump fuel pressure? SC1 |
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10-10-2010, 10:24 PM
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#4 |
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Registered User
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im gettin around 30 with the hx and i have got 40 with the hy. just driving up hills the egt goes over 1000.
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10-11-2010, 09:35 AM
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#5 |
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Registered User
Join Date: Feb 2010
Location: A 5th dimension, beyond that which is known to man.
Posts: 1,044
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with a bigger turbo you will have higher cruising egts but your wide open throttle runs will be cooler.
have you noticed that?
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92 W250- K&N Filter, Smoke Screw Adjusted, Synthetic Transmission Fluid. 340hp/662tq (8/24/12) |
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10-12-2010, 11:16 AM
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#6 |
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Registered User
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how will the egts be for towing
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10-13-2010, 09:33 PM
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#7 |
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Registered User
Join Date: Apr 2003
Location: Cummins Technical Center, IN
Posts: 6,527
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Cruising EGT shouldn't be that much higher.
He might have an exhaust leak. Check the turbo mounting surface and the exhaust manifold gasket area for soot streaking.
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Justin Mechanical Development Senior Engineer, Cummins Heavy Duty Engineering ** Opinions expressed are mine alone, and NOT the official position of Cummins, Inc., or any affiliate or subsidiary.** |
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10-16-2010, 06:47 PM
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#8 |
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Registered User
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I just swapped in a 351cw and it seems like I'm running pretty hot, around 750 cruising and up in the 1100 range on WOT, any thoughts?
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2000 qc lb 2wd, nv5600,southbend dd3600, airdog, he351cw, 110 sticks, brute force, 4" turbo back no muffler, juice w/att (vp tapped). Leveling kit, american racing 17s |
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10-16-2010, 08:17 PM
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#9 |
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Registered User
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Cruisin for me I see 800 to 1ooo but wot it wont pull over 1300.
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98.5 Dodge QC 2500 24 valve 5.9L Rebuilt auto transmission, billet input and output shafts, trans buddy valve body, hd flex plate, triple lock torque converter- ARP 12mm head studs Full fass 95 system- MBRP 4" turbo back F1 Mach 2 injectors- HTB2 62-65-14 Edge Insight Cts- Autometer fuel & boost- Cfm+- afe stage 2 intake- Edge Drag Comp- recalibrated speedo Borgeson steering box & shaft- Bd steering stabilizer 4.5" lift 18X9 BZO rims 35" Dick Cepek`s 525hp & 1113 ft-lbs |
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10-18-2010, 03:11 PM
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#10 |
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Registered User
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correct me if i'm wrong, but i've heard bigger ( single ) turbo = higher egts because you have to give more fuel to drive it. if you want more power and lower egts, go with twins?
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10-25-2010, 09:56 AM
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#11 |
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The Guru
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I would start with a boost leak check and look for soot. How did the turbine disk tip clearance look inside the housing? What size of housing you using? Stock HX35 probably and running the 40 compressor side? Which impeller is used on the compressor side?
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-white 02 sport QC, SB, 3/4 4X4 SDX 7X10's 300 bar, Stock HX-35 water/meth -black 2010 3500 Laramie CCSB, H&S Blackmaxx/overdrive, passenger airhorn, home made 4in exhaust |
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10-25-2010, 05:35 PM
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#12 |
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Registered User
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blackspeeper, your built tranny and i'm guessing tighter converter that worked well with your hy may be keeping the rpms too low when you are just driving around, not allowing the 35/40 to spool where your hy would. Getting over 1000 going uphill does sound like a boost or exhaust leak, it could be a combination of both.
Sloth, 1100 at WOT isn't hot. You can run these engines at 1250* pre turbo all day. Chanceray, bigger turbos are slower to spool but move more volume than stock chargers. so you give up quick spool to get more top end power and cooling. More fuel is not a linear relation to higher egt because if you have more air to go with more fuel, it will run cooler than more fuel with the same amount of air. Twins utilize the quick spoolup of a small (usually stock) charger as well as a large turbo for top end cooling so you get the best of both worlds.
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'97 2500 5k gsk, 21ish* timing, rack plug, 5x.014's, pump turned up, twins, O-ring, studs, ported, valve job, 60lb springs, bored .020 over, industrial pistons, internally balanced, and a 1 jigawatt flux capacitor. KDP killed 12-30-07 '02 Yamaha R1 '08 Yamaha R1 MARYLAND DTR CHAPTER #33 To see a wrong and not expose it, is to become a silent partner to its constituance. |
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10-25-2010, 06:19 PM
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#13 |
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Registered User
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I think I know where the boost is leekingfrom
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10-25-2010, 06:19 PM
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