I elected to bypass the overboost sensor on my 84 TDT this afternoon on a whim. cannot tell much difference in terms of performance. Then I got to thinking that a wastegated turbo, is also a overboost protection, so why the redundency of a overboost sensor? may be I dont have enough boost going on to make it to the enrichment circut? Just curious, as I have plenty of other projects to do on this car before playing with the engine...

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46 WDX Power Wagon

84 300TDT daily driver

Wastegate hoses fail...particularly when they are as old as many of these.....its a failsafe protection and the Garret t-3 WILL give over 20 psi boost when that hose fails....and will do it without warning.

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Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
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Section 609 MVAC Certified
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"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

Don't!

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

My 240D never had one. But instead of the overboost valve, I'm installing a boost gauge to monitor the pressure. I can't imagine you are going to hurt much of anything running 20 psi, maybe you'll see your EGTs rise a bit. Without fuel for all the extra hot air, that's all it'll be.

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'83 240D with 617.952 and 2.88
'01 VW Beetle TDI
'05 Jeep Liberty CRD
'89 Toyota 4x4, needs 2L-T
'78 280Z with L28ET - 12.86@110
Oil Burner Kartel #35

http://i16.photobucket.com/albums/b1...oD/bioclip.jpg

Well it will go to 20 psi with your foot barely down and the car going less than 20......Mine spiked to that before I got the boost controller set right....I had no intention to find out how high it would go......but it is definately something more than 20 psi and maybe not just a little ..

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Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
---------------------
Section 609 MVAC Certified
---------------------
"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

Ok, I will put it back. At least for now....

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46 WDX Power Wagon

84 300TDT daily driver