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#1
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13 psi to 13.5 psi Boost. Too Much?
I tested my 617 turbo and found it was only making 8 psi of boost max.
I built a manual boost controller, see: The"D.I.Y."Manual Boost Control and installed it on long hoses so I could adjust in in the cabin while driving. I set it to 13 -13.5 psi max boost at 4000 rpm. Is that too much boost? I then adjusted the ALDA top screw (the tamper seal was already broken) out another 1/3rd turn, so the screw was all the way CCW, and stopped. This adjustment made an obvious improvement in power. It doesn't make any black smoke, so I could shim the ALDA and readjust the top screw for even more power.
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. 1st MBz: 1982 300SD 2nd MBz: 1987 300SDL 3rd MBz: 1995 S420 4th MBz: 1987 190DT 5th MBz: 1984 300SD w/1983 300DT engine 6th MBz: 1999 C230k I'm 3rd owner, got it w/57,235 miles. and manages Mom's 2007 R320 CDI |
#2
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I think that is about what it should have.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC] ..I also have a 427 Cobra replica with an aluminum chassis. |
#3
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If the set screw is all the way CCW, are you confident that there are any more ALDA-related gains to be had? My impression (I could be mistaken) is that having the set screw all the way CCW has the same as having no ALDA.
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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles 06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU 91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion 19 Honda CR-V EX 61k mi Fourteen other MB's owned and sold 1961 Very Tolerant Wife |
#4
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Some People remove the ALDA.
As you noted the extra Boost is no good withoug extra Fuel. If you keep adding both it is a good Idea to install a Pyrometer so you can monitor your Exhaust Gas Temps. After X Exhaust Gas Temp it gets hard on the Engine.
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84 300D, 82 Volvo 244Gl Diesel |
#5
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hell I hit over 22psi all the time,been doing it 3 years,no problems.
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1999 w140, quit voting to old, and to old to fight, a god damned veteran |
#6
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Thank you for the advice. I'm not looking for ultimate performance.
I think I will keep it as it is for now. It runs good and accelerates much better than before. I'll wait to see how the mpg has changed before doing more.
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. 1st MBz: 1982 300SD 2nd MBz: 1987 300SDL 3rd MBz: 1995 S420 4th MBz: 1987 190DT 5th MBz: 1984 300SD w/1983 300DT engine 6th MBz: 1999 C230k I'm 3rd owner, got it w/57,235 miles. and manages Mom's 2007 R320 CDI |
#7
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What kind of EGT's are on that? Is that absolute or relative?
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http://superturbodiesel.com/images/sig.04.10.jpg 1995 E420 Schwarz 1995 E300 Weiss #1987 300D Sturmmachine #1991 300D Nearly Perfect #1994 E320 Cabriolet #1995 E320 Touring #1985 300D Sedan OBK #42 |
#8
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I only hit 20 while my slush box flares into gear. My KKK k26 normally sees 14-15... I need to crank her down to 12.5 though... I can smell my EGT's.
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1981 300TD 4 speed manual Euro bumpers, zender valance and skirts, H&R springs, billy HD's, leveled sls, real AMG Pentas 16x8 et11, vdo boost/egt gauges intergrated into ash tray, eurolights, led 3rd brake light |
#9
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No its real boost,but I try and hold pedal to 14 which is a safe psi.When I propane injection to provide more fuel,i'll run higher.
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1999 w140, quit voting to old, and to old to fight, a god damned veteran |
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