Why did the 1.8 engines have L-jet? Options

[VaccaRabite]

Has there ever been a reason Porsche/VW speced L-jet injection for the 1.8 engines instead of D-jet like the 1.7 and 2.0 engines used?

Usually when manufactures do this there are financial reasons for the change. Either they have the same engine on other vehicles they produce, or its just cheaper to use whatever part is being used.

But Porsche didn't use the T4 motor on other cars at the time. And if it was cheaper, they would have done away with Djet on the 1.7 and 2.0. I don't think VW was using l-let at the time for the bus... but maybe?

There has to be a reason that Porsche wanted Ljet on the 1.8.

Zach

[dr914@autoatlanta.com]

more modern, simpler and more emissions friendly

Has there ever been a reason Porsche/VW speced L-jet injection for the 1.8 engines instead of D-jet like the 1.7 and 2.0 engines used?

Usually when manufactures do this there are financial reasons for the change. Either they have the same engine on other vehicles they produce, or its just cheaper to use whatever part is being used.

But Porsche didn't use the T4 motor on other cars at the time. And if it was cheaper, they would have done away with Djet on the 1.7 and 2.0. I don't think VW was using l-let at the time for the bus... but maybe?

There has to be a reason that Porsche wanted Ljet on the 1.8.

Zach

[wonkipop]

more modern, simpler and more emissions friendly

Has there ever been a reason Porsche/VW speced L-jet injection for the 1.8 engines instead of D-jet like the 1.7 and 2.0 engines used?

Usually when manufactures do this there are financial reasons for the change. Either they have the same engine on other vehicles they produce, or its just cheaper to use whatever part is being used.

But Porsche didn't use the T4 motor on other cars at the time. And if it was cheaper, they would have done away with Djet on the 1.7 and 2.0. I don't think VW was using l-let at the time for the bus... but maybe?

There has to be a reason that Porsche wanted Ljet on the 1.8.

Zach

correct answer. way simpler. way cheaper. emissions emissions emissions.

D jet by Bosch (Germany) is Electrojet by Bendix (Chicago).
They bought the patents or the license when Bendix and Chrysler gave up.
L jet is the native german system. completely their own idea.

and.......it wasn't anything to do with Porsche. or Porsche's choice.
100% VW.
VW backed Bosch on D Jet even beore Mercedes Benz decided to dip their toe in the water, despite being asked first. VW never hesitated. And they got L jet first.
Primarily it was all about VW engines. The 914 had one of those.

Porsche don't use L jet on their aircooled engines until the 964 comes along 15 years later. i think its on the 924. but thats a VW engine again. and i suppose its on the 928 or a version there of.
by then everybody was using L jet on everything pretty much.
or later versions of L jet.
yes - its on the 912E. but thats a VW engine. plain and simple. supplied to Porsche.

The VW 412 is numero uno for L jet. 3 months before the 914.
same 1.8 engine more or less. but the honour goes to the 412.
the California market VW bus is the 3rd car, about 3 months after the 914.

Production of the 1.8 in 74 is delayed by 3 months because the L jet components were new and in limited supply. a staged introduction.

thats not to say Porsche were sitting on the hands during all this.
no. they were developing this.
(finally found a decent image of one).





this would have been in the replacement for the 914.
intended for production in 1972/73.
its the engine (or one of the versions) for the aborted VW EA266 -Porsche Project 1966.
came in 3 cylinder and 4 cylinder laid flat version for what would have replaced the beetle. with power range from 50hp up to 110 hp. the 4 cylinder 914 would have got the 110 hp version along with a souped up version of the VW saloon. basically a Golf GTI before the GTI.

not sure what version of fuel injection this would have got. its hard to tell.
but it dates from 1967-1972 development period.

all under engineering direction of f. piech.
the idea was a modular engine family.
f piech was one hell of a evil genius.
but this project blew up in his face big time.

porsche were developing flat V versions of this for their own cars.
a flat 6 derived from the VW flat inline 3. and a flat V8 derived from the inline 4.

but it all got detonated.
so they battled on with the tail end of the aircooled cars while VW under a lot of pressure very quickly developed up the Golf and other water cooleds and cut Porsche adrift, terminating their development contract which had been in place since the end of WW2.

basically the 73 onwards 914s were never really intended to exist in f piechs masterplan for "world domination".