LH-jetronic

[pentoman]

I remember reading how Mercedes' 1990s 32 valve 5.0 V8, when fitted to the 500E model, was given "LH" jetronic rather than L or KE(?) that it had in the 500SL and 500SE/L, and this gave it another 22 lb ft of torque. Yet power apparently remains the same at from memory 326bhp on earlier cars and 322bhp on '93 and '94 cars.

22 lb ft is a fairly impressive torque gain - is it purely down to the more accurate air mass measuring because LH jetronic is a "hot wire" type of intake air measurement system? It seems to me therefore it's vastly superior to KE jetronic which to me seems complicated and irritating! Yet there are praisers of KE jetronic on here who reckon it's not bad...

I think I just understand computers better .

Also, could LH Jetronic be 'chipped'?

[900T-R]

pentoman said:

Also, could LH Jetronic be 'chipped'?

[martind]

pentoman said:

Also, could LH Jetronic be 'chipped'?

The Porsche 16v 928 '84-'86 used a LH, I dont know which version.
The later 32v Porsche 928 uses the LH 2.3 on the '87-'95 models & one of the owners has spent a couple of years developing a tuner for it , the 'shark tuner' which allows you to modify any of the LH's system's & is now working on a tuner for the earlier LH on the 16v 928's
The LH on the 928 is capable of supporting over double the original HP of the 928 engine when supercharged or stroked so is very versatile .
www.jdsporsche.com/sharktuner.html (he also repairs them for 1/4 of the price from Porsche)

Volvo also used the LH on some models , the 2.2 version.

Edited by martind on Tuesday 30th January 12:01

[filmidget]

Volvo used LH2.2 and LH2.4 that I know of, and chips are available for LH2.4 (and support at least 50% power increase IIRC).

Our '92 940 Turbo uses 2.4 (although a sore point at the moment as it has a (non)running fault that is turning out to be very hard to rectify).

[pentoman]

Is it still electro-mechanical, or does it have electronic injectors?

[900T-R]

Full EFi. This means that as for injectors, the world is your oyster as long as the impedance matches.