[T3] Diagnosis help for a badly running 1971 VW 411

Dave Hall dave at hallvw.clara.co.uk
Tue Aug 13 12:02:49 PDT 2019

Type 2s got a Type 4 engine option from '72 in some markets, I believe.  The same happened with Type3 dual carb engines in around 1965, which Jim noted a few months ago, when he found lots more engines made than Type 3  cars

UK VW Type 3 and 4 Club.

-----Original Message-----
From: "Jens Vagelpohl" <jens at type4.org>
Sent: ‎13/‎08/‎2019 18:30
To: "org type3 at vwtype3.org" <type3 at vwtype3.org>
Subject: Re: [T3] Diagnosis help for a badly running 1971 VW 411

> I'm not sure what the difference was between the EA and EB engines. It 
> seems likely that they were different compression ratios, as the EA came 
> with 80 HP while the EB came with 72 HP. (Or, to use the proper 
> engineering lingo, BHP, Brake HorsePower.)
> It's interesting that while the '74 D-jet 1.7 L EA engines were still rated at 80 
> BHP, the new '74 L-jet 1.8 L EC engines delivered just 76 BHP.

The difference may be about emission control devices and adjustments. The 1.8 definitely had a lot for the CA market.

> Note that it's possible that these production numbers include everything that 
> went into both Type 4s and 914/4s. There's no way to tell, and I suspect that 
> engines for both cars were made at the same place at the same time, so 
> there's no way to tell from here how they were divided up.

Yes, they will have been built in the same place for both cars and have a single run of engine number/engine code combinations. You would never have EC 000 001 in a 412 and another EC 000 001 in the 914.


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