[T3] ECU question .

[Jim Adney]

On 9 Jul 2016 at 13:41, William J wrote:

> Thanks . One thing . I didn't have any trouble mounting the single vacuum 
> can on the 72 dual advance dist and didn't modify it. 

Okay, I just checked several single advance cans on a '72 dist body 
and found that a 505 ('73) can WILL fit, but neither (AT or MT) '71 
cans will fit without modification. That's interesting and useful 
information, since it appears that upgrading a '72 dist to '73 specs 
could be done by just using the '73 can.

> The Map I have that was given to me only has the Bosch number on it ,
> it is the 116. 

Then it is a '73 MAP sensor. It lacks the VW number because it did 
not come thru the VW distribution network. It was bought from Bosch.

> How can the ECU and pressure sensor have the same VW #'s? 

Oops! That's clearly not right. In my haste to copy and paste I 
forgot to change one digit. Thanks for catching that. See the revised 
numbers below.

Here's what the US got in '72 and '73:

1972 Type 3s

	Brain:
		VW 311 906 021 E / Bosch 0 280 000 028
	Pressure sensor:
		VW 311 906 051 E / Bosch 0 280 100 106
	Distributor:
		MT: VW 311 905 205 AE / Bosch 0 231 172 009 (dual vac can)
		AT: VW 311 905 205 AF / Bosch 0 231 172 011 (dual vac can)

1973 Type 3s

	Brain:
		VW 311 906 021 E / Bosch 0 280 000 048
	Pressure Sensor:
		VW 311 906 051 E / Bosch 0 280 100 116
	Distributor:
		MT: VW 311 905 205 AG / Bosch 0 231 163 027 (single vac can)
		AT: VW 311 905 205 AH / Bosch 0 231 163 029 (single vac can)

-- 
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Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
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