is lean cruise bad for the engine

[vzsv8]

I read an interview with the/an tuner for HSV and the question of lean cruise came up, his answer was that they did not consider that it was a priority for their customers. He also mentioned tip in response.
Unfortunatly I can't find the article, I pinched the magazine from the huge pile in the son's room.
Corvette probably has a similar market position.
As for Diesels they produce huge levels of NOx, which has been why in Australia at least until very recently they did not bother to measure it.
As for the Cessna link these motors are at around 65% load and they are running turbos (mainly to compensate for altitude). When I cruise I am using 20% or less load, at around 2000rpm. Very hard to burn a piston or valve like this, if in doubt check the EGT map I posted up earlier in this thread.
If it was bad for the motor, Holden would not have used it for years.
But perhaps F**d would have
Cheers, Steve

[ssvolvo]

Almost certainly some of you remember the old days when leaning out a carbed engine eventually lead to burnt exhaust valves, cracked heads.


One has to love late model fuel injection. I goofed my VE early on and was riding around at 17-18/1 A/F. Never would have known it by the way it ran.

[Wolfie]

RE: Where you have 14.63 in the AFR table it will be in 'semi closed loop', not the same as 'full' closed loop like the factory PCM does. I am sure from memory (it's been a few years!) the PCM bypasses the lean cruise routines unless it is in full closed loop.

Cheers,
Ross
-------------------------

I'm playing with it now, and I believe in OLmaf...
It does work this way.
I was leery of trying it as I rely on my vehicle day to day in my business.
But always looking for gas milage. I was just running with a commanded
afr of 16.30 but with leancruise am playing with 15.4

[Extinct]

Can anyone one email me the CAX file that was downloaded ? I have a 2006 truck that there is no COS available for that we would like to use the LC on.

Thanks

Tim

[Extinct]

OK, I got the zip file downloaded from the bit torrent site, however my idiotic version of Vista won't allow me to open it. Anyone want to extract the files and remove the permissions for me ? I can email it to you and then you can email it back ?

[joecar]

OK, I got the zip file downloaded from the bit torrent site, however my idiotic version of Vista won't allow me to open it. Anyone want to extract the files and remove the permissions for me ? I can email it to you and then you can email it back ?

You mean these ones (post #8): showthread.php?t=9143

[Extinct]

I think those are probably the ones, thanks.