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

[JeffBowlsby]

No ruffled feathers here...we are here in part to learn from each other.

From the great Wikipedia:

"The Electrojector was first offered by American Motors Corporation (AMC) in 1957.[3][4] The Rambler Rebel was used to promote AMC's new 327 cu in (5 L) engine.[5] The Electrojector-injected engine was an option and rated at 288 bhp (215 kW).[6] It produced peak torque 500 rpm lower than the equivalent carburetor engine[7] The cost of the EFI option was US$395 and it was available on 15 June 1957.[8] According to AMC, the price would be significantly less than Chevrolet's mechanical fuel injection option.[9] Initial problems with the Electrojector meant only pre-production cars had it installed so very few cars were sold[10] and none were made available to the public.[11] The EFI system in the Rambler worked well in warm weather, but was difficult to start in cooler temperatures.[8]

Chrysler offered Electrojector on the 1958 Chrysler 300D, DeSoto Adventurer, Dodge D-500, and Plymouth Fury.[9] The early electronic components were not reliable in an underhood environment and were not easily modified as engine control requirements advanced. Most of the 35 vehicles originally equipped with Electrojector were retrofitted with 4-barrel carburetors. The Electrojector patents were subsequently sold to Bosch.

Bosch developed their D-Jetronic (D for Druckfühlergesteuert, German for "pressure-sensor-controlled"), from the Electrojector, which was first used on the VW 1600TL/E in 1967. This was a speed/density system, using engine speed and intake manifold air density to calculate "air mass" flow rate and thus fuel requirements. This system was adopted by VW, Mercedes-Benz, Porsche, Citroën, Saab, and Volvo. Lucas licensed the system for production in Jaguar cars, initially in D-Jetronic form, before switching to L-Jetronic in 1978 on the XK6 engine."