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#1
09-27-2013, 09:22 AM
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Bosch boost sensor info
Anyone know anything about these? Available in the early 90's 300D's, I am using the metal ones (I have 2 metal ones and one plastic denso).
Once upon a time I swear I saw a graph (manual?) for the calibration along with some stats on it. I've assumed its a 3bar abs sensor.
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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 
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#2
09-27-2013, 09:42 AM
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Found it on the FSM on startek!
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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
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#3
09-27-2013, 10:59 AM
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Nice! How many bar can it sense?
-J
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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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#4
09-27-2013, 01:30 PM
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Metal bosch one is 3 bar the plastic denso 2.5bar. That is absolute so subtract ~1bar for altitude. Added boost to my arduino gauge:
Esm 2.1 first drive. - YouTube Seems like I only have a 5% difference, at 5V in the metal regs 4.75v max. May not even be worth reprogramming. However the 50* round off I did in the EGT is bothering me. I think I will pull it to fix the 5% in boost and round to 10* rather than 50*.
__________________
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
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#5
09-27-2013, 04:38 PM
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Do your mean the MAP sensor in the 92-93 300D or the overboost switch in the 90-91 300D? Do you know where the MAP sensor is located in a 92-93? I see a hose teeing off the ALDA line leading into the firewall but I can't trace it beyond that.
Sixto 87 300D
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#6
09-27-2013, 06:13 PM
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Odd they used 2 different range sensors. Is the EDS unit different between the two?
Older TDIs have a 2.5 bar sensor. The computer uses the value before starting for altitude calculation. Sent from my iPhone using Tapatalk - now Free
__________________
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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#7
09-27-2013, 07:14 PM
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Quote:
Quote:
__________________
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
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#8
09-27-2013, 07:32 PM
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W-w-w-w-wait. The 90-91 has a MAP sensor and an overboost switch? There was a separate discussion whether the 90-91 would cut boost if it sensed overboost through the MAP sensor or concluded such from too much airflow in the absence of the overboost switch.
Sixto 87 300D
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#9
09-27-2013, 08:38 PM
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Quote:
__________________
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
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