Lean Cruise Mode?
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Joined: Mar 2002
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From: North Las Vegas, NV
Lean Cruise Mode? I have an 01 Z28 and see that according to HPTuners 2.1, I can enable it. I know that after "x" amount of light throttle cruising(ie..highway), that if this works, we can lean our cars out to 15.5:1 or more. Anyone try this yet? Any input would be great, thanks in advance!
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Joined: Mar 2002
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From: North Las Vegas, NV
Originally Posted by racecar
Never tried it, but with all of the heat that a turbo adds, do you really want to go to 15.5???
Sorry about that, I should have clarified. Its not for my 98(turbo car). Its for my daily driven 01 Z28. What can I say, I'm a lucky bastard to have 2 Fbodies
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Joined: Mar 2002
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From: North Las Vegas, NV
Originally Posted by jimmyblue
It's disabled down in the bowels of the OS so any
fiddling will have no effect. It's just there because
it's a cross-platform function but it's only a tease.
fiddling will have no effect. It's just there because
it's a cross-platform function but it's only a tease.
Damn. Thanks for the information. At least I didn't try getting it to work and pull my hair out because I thought I was doing something wrong.
You can always cheat the sensors to make your own for of lean cruise. You can change the voltage offsets for your O2 sensors if running in closed loop or you can lean out the cruise cells if running in open loop. That's what I do.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
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From: Mannheim, Germany
Originally Posted by Patrick G
You can always cheat the sensors to make your own for of lean cruise. You can change the voltage offsets for your O2 sensors if running in closed loop or you can lean out the cruise cells if running in open loop. That's what I do.
(In EFI-L)Does this mean using the "Closed Loop Mode" and "O2 Switch point" tables to offset the O2's to switch at a leaner voltage for low Grams/Second?
Originally Posted by Holden LS1 Tonner
The o2 voltages don't switch in lean cruse mode , it just goes to a comanded afr . the reading on the o2's is about 50-20 mv from what i have seen .
