Ok I know that I need to do the wastegate swap, to solve alot of my issues. But until I can get all of that in line, is it safe to leave the wastegate in the closed position, with no vacum going to it? Or will this little turbo build enough to blow itself up?

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1987 300D(Erma)- #14 head, 193k
2003 TDI Beetle sold
1985 300sd sold
1987 300D(Ursala)- #14 head, 157k when sold
1987 300D(Wilbur)- #14head, 356,000+miles, sold after 7 days of owning it.
1992mercedes 300d- totaled and in a junk yard somewhere..
1983 mercedes 300sd- scrapped
1980 mercedes 300sd first mercedes diesel-sold

as long as you don't floor it for very long, you'll be ok. it SHOULD be safe to floor it, if your overboost protection is working...

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

Thanks for the quick reply, im going to go test drive and see how it does

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1987 300D(Erma)- #14 head, 193k
2003 TDI Beetle sold
1985 300sd sold
1987 300D(Ursala)- #14 head, 157k when sold
1987 300D(Wilbur)- #14head, 356,000+miles, sold after 7 days of owning it.
1992mercedes 300d- totaled and in a junk yard somewhere..
1983 mercedes 300sd- scrapped
1980 mercedes 300sd first mercedes diesel-sold

bad idea if your turbo has a few miles on it! If you over spin a higher mile turbo even a little it will not be pretty.

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1987 300D 180k
1985 300SD 330k Helga
1992 300D Lola 269k- Sold
1986 325 coupe Bessie >300k Original engine(ODO Broke) sold
2006 2500HD Druamax Linda- Tows boat and looks pretty in garage thats about it

?? The 92 version is normally in the open position. Turbo not operating. When you add the vac it closes the wastegate so you get turbo boost. If you disconnect the vac line it will be in the open (no turbo). The pressure activated (88 version) is pressure activated (normally closed) and opens when pressure is applied. If you were to wire it so the turbo is always on you have no protection. You run the risk of over boost. Running what would be considered lean and excessive generating of heat. The turbo kicks in at approx 2400 rpm or so.

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92 300D 2.5L OM602 OBK #59

Well I tried it, and the car has never accelerated, ran, or shifted better than it did tonight. I was really impressed for a brief second i had to try to feel the shifts. And the car was much faster than normal. This is with the vacuum line removed from the actuator and then plugged. i didnt push the rpms, in fear of overboosting but it still accelerated very very well.

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1987 300D(Erma)- #14 head, 193k
2003 TDI Beetle sold
1985 300sd sold
1987 300D(Ursala)- #14 head, 157k when sold
1987 300D(Wilbur)- #14head, 356,000+miles, sold after 7 days of owning it.
1992mercedes 300d- totaled and in a junk yard somewhere..
1983 mercedes 300sd- scrapped
1980 mercedes 300sd first mercedes diesel-sold

yea those will make upwards of 25-30 lbs of boost with no wastegate... take it easy, they are bomb proof but no sense on lighting the fuse to check it out is there?

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1996 s10 zr2 with a 6.5 turbo diesel
1996 c2500 suburban with a 6.5 turbo diesel
1981 300sd with a turbo 617
Monte carlo figure 8 car

yeah, its only temporary until I can get all of the wastegate swap together. Right now Im not letting her get much over 3000rpm. Which is weird, because before I had to take it to 3000rpm just to keep up in in town driving, now 3000rpm is more than enough to pull out into a 55mph road and not think anything of it.

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1987 300D(Erma)- #14 head, 193k
2003 TDI Beetle sold
1985 300sd sold
1987 300D(Ursala)- #14 head, 157k when sold
1987 300D(Wilbur)- #14head, 356,000+miles, sold after 7 days of owning it.
1992mercedes 300d- totaled and in a junk yard somewhere..
1983 mercedes 300sd- scrapped
1980 mercedes 300sd first mercedes diesel-sold

Sweet! Now you know what it feels like to have normal amounts of boost

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1996 s10 zr2 with a 6.5 turbo diesel
1996 c2500 suburban with a 6.5 turbo diesel
1981 300sd with a turbo 617
Monte carlo figure 8 car

Ive never driven a diesel mercedes that boosted correctly and shifted correctly at the same time! Its like a whole new world

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1987 300D(Erma)- #14 head, 193k
2003 TDI Beetle sold
1985 300sd sold
1987 300D(Ursala)- #14 head, 157k when sold
1987 300D(Wilbur)- #14head, 356,000+miles, sold after 7 days of owning it.
1992mercedes 300d- totaled and in a junk yard somewhere..
1983 mercedes 300sd- scrapped
1980 mercedes 300sd first mercedes diesel-sold

What exactly did you try? I see the line from the wastegate, is that what you plugged? I am having the same problem with my 1992 300sd. Trying anything I can without overboosting my engine. I am new to the site and would appreciate any help or advice.

Why dont people follow the FSM and run diagnostics?

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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

You have a FSM? Know how to read? Can actually find something easier than posting? WOW!!! Simply amazing.

A boost gauge would be helpful while driving when experimenting. I think all boosted cars should have gauges....actually, it would be preferable for all cars period to have a decent set of gauges from the factory.

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.

Anywith the p2 flap have boost sensors. You can use this.

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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

He either hooked up the a constant vacuum signal to the wastegate actuator or wired the wastegate shut.

Sixto
87 300D