Vehicle & Technical > Range Rover
V8 Downpipe, one or two cats?
Range Rover Blues:
He's right you know ;) the hot-wire system is only self-tuning with s full set of sensors and although early UK models came without lambdas sensors and had a different tune select resistor this put the ECU into fixed-map mode.
The big problem with tuning the system is the air flow at full throttle is higher than "normal" or more importantly the air flow the ECU perceives as maximum is reached at a lower throttle opening which will make the system less economical.
With a heavioy tuned engine another limiting factor is that the injectors are "on" most of the time and unlike other types of injector turning up the fuel supply pressure doesn't overcome this, it takes more power and fractionally more time to open them against the supply pressure.
Typical, another Lucas Prince of Darkness speciality elektrik system.
Rossko:
--- Quote from: Range Rover Blues on January 22, 2009, 01:50:45 ---Typical, another Lucas Prince of Darkness speciality elektrik system.
--- End quote ---
Did you know it was a bought-in Bosch design, same as used on BMW of the period, and Lucas version also used on SAAB etc.?
It does what it does, simply and effectively. And as it turns out fairly reliably after twenty years service. It's not Lucas fault if folk want to mess about with it ;)
Range Rover Blues:
--- Quote from: Rossko on January 23, 2009, 10:49:14 ---
--- Quote from: Range Rover Blues on January 22, 2009, 01:50:45 ---Typical, another Lucas Prince of Darkness speciality elektrik system.
--- End quote ---
Did you know it was a bought-in Bosch design,
--- End quote ---
I didn't. I do know there were better alternatives available using full multi point technology but as usual it was built down to a cost.
Like you say it work well in factory trim and is very reliable. Very few EFi systme cope well with "timnkering" because full throttle air flow is one of the parameters that has to be programmed in.
Jonny Boaterboy:
Very interesting stuff you boys know a thing or two! any way here's my botch of cat removal!!
http://www.mud-club.com/galleries/Jonny+Boaterboy
Range Rover Blues:
Crikey mate, it's clean under there.
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