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#1
03-25-2009, 11:09 PM
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VNT turbo question
I was wanting to know where dose the device that controls the VNT Veins hook up to, intake manifold??
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Current Garage 2008 Mercedes GL320 CDI 188k mi Repair/Work in progress 1994 S350 160k mi Garage Queen & prepping for repairs 2005 E320 CDI 203k mi Healthy & Daily Driver 1994 S350 357k mi Retried as parts car 1984 300TD 214k mi Blown OM617 Poss OM603 Swap?? Sold 1987 300SDL 200K+ 1994 S320 181K mi 2008 E320 Bluetec 127k mi 1999 S420 130K mi 1980 240D 360k mi 15+ Others that has come, stay and gone GONE, BUT NOT FORGOTTEN  1995 E320 SE 220k mi 1984 300SD 350k mi Last edited by Actros617; 03-25-2009 at 11:14 PM. 
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#2
03-25-2009, 11:20 PM
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It can be done many ways most guys use engine (vac pump) via modified VCV vacuum to regulate vein position. There is still the issue of controlling boost though
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Regards, Ian White 1995 E300 Diesel w124 OM606 2014 E550 w212 M278 biturbo 2001 BMW 740i E38 M62 (past) 1981 300SD w126 OM617 (past)
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#3
03-25-2009, 11:29 PM
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VCV is that white things that sits near the injector pump right??? If its is I so happen to have an extra
 , But where dose the VCV connect to, the throttle linkage?? and where dose it get its vaccume form, the brake Booster line, Directly to the Vaccume pump...
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Current Garage 2008 Mercedes GL320 CDI 188k mi Repair/Work in progress 1994 S350 160k mi Garage Queen & prepping for repairs 2005 E320 CDI 203k mi Healthy & Daily Driver 1994 S350 357k mi Retried as parts car 1984 300TD 214k mi Blown OM617 Poss OM603 Swap?? Sold 1987 300SDL 200K+ 1994 S320 181K mi 2008 E320 Bluetec 127k mi 1999 S420 130K mi 1980 240D 360k mi 15+ Others that has come, stay and gone GONE, BUT NOT FORGOTTEN 1995 E320 SE 220k mi 1984 300SD 350k mi
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#4
03-26-2009, 01:02 AM
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The VCV sits on top of the IP it controls the vacuum to the trans and decreases the vac supply with throttle position. At WOT trans is supposed to get no vacuum. The VCV is connected directly to the IP, which makes it in a round-a-bout way, connected to the throttle linkage. Vacuum is supplied to it from the Vacuum pump via main vac line.
~Ian
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Regards, Ian White 1995 E300 Diesel w124 OM606 2014 E550 w212 M278 biturbo 2001 BMW 740i E38 M62 (past) 1981 300SD w126 OM617 (past)
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#5
03-26-2009, 02:03 AM
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You could use a simple setup like what I use on my TDI to limit boost spikes... full vacuum goes to the turbo all the time. When pressure gets too high it overcomes a spring holding a ball over a fitting connected to a vacuum line, releasing vac from the VNT.
A better idea would be to replace the vacuum actuator with a pressure one. -Jason
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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket  Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E.
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#6
03-26-2009, 08:52 AM
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A simple search will yield good results:
Just finished my VNT install!! Garrett GT2056V (Liberty CRD turbo) on a 617. The first link uses a VCV + boost cutoff valve (similar to what Jason said) the second uses VCV + two actuators vacuum and pressure
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For Sale: 1982 MB 300TD 1995 Chevrolet Suburban 6.5TD Sold: 1980 IH Scout Traveler- Nissan SD33T Diesel
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#7
03-26-2009, 01:04 PM
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Quote:
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$60 OM617 Blank Exhaust Flanges $110 OM606 Blank Exhaust Flanges No merc at the moment
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#8
03-26-2009, 03:16 PM
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In stock applications they are controlled by a computer controlled vacuum supply or an electronic actuator. On my setup I have it being controlled by boost from a nipple on the compressor outlet (just like a wastegate) and from vacuum from the modulator on the back of the IP/
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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver 1982 300SD - 232K miles - Wife's Daily Driver 1986 560SL - Wife's red speed machine
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#9
03-26-2009, 03:17 PM
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Quote:
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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver 1982 300SD - 232K miles - Wife's Daily Driver 1986 560SL - Wife's red speed machine
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#10
03-26-2009, 05:56 PM
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Did you frabricate that adapter plate??? How did you install it and how dose that help to bolt on the turbo...
__________________
Current Garage 2008 Mercedes GL320 CDI 188k mi Repair/Work in progress 1994 S350 160k mi Garage Queen & prepping for repairs 2005 E320 CDI 203k mi Healthy & Daily Driver 1994 S350 357k mi Retried as parts car 1984 300TD 214k mi Blown OM617 Poss OM603 Swap?? Sold 1987 300SDL 200K+ 1994 S320 181K mi 2008 E320 Bluetec 127k mi 1999 S420 130K mi 1980 240D 360k mi 15+ Others that has come, stay and gone GONE, BUT NOT FORGOTTEN 1995 E320 SE 220k mi 1984 300SD 350k mi
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