Closed loop Lean cruise and idle and cruise timing

General Tuning Questions And Discussions
'quipt4it
Posts: 675
Joined: Sun Oct 28, 2012 12:57 pm

Re: Closed loop Lean cruise and idle and cruise timing

Post by 'quipt4it »

This made me think^
An 82 degree C (180 degree F) t/stat looks like it may not be letting the engine warm up effectively.
Stock is 91 degrees C (195 F).
Maybe drop in a 91 and see how it goes.
vp304
Posts: 451
Joined: Wed May 19, 2010 2:21 pm

Re: Closed loop Lean cruise and idle and cruise timing

Post by vp304 »

Fitted the motor 4000km ago have you seen were the thermostat is in a l67 :(
'quipt4it
Posts: 675
Joined: Sun Oct 28, 2012 12:57 pm

Re: Closed loop Lean cruise and idle and cruise timing

Post by 'quipt4it »

No pain no gain. :lol:
...or were you really asking where it was.
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immortality
Posts: 3416
Joined: Thu Apr 09, 2009 12:31 pm
cars: VH, VN, VS, VX

Re: Closed loop Lean cruise and idle and cruise timing

Post by immortality »

Are you using the boost charge table to adjust for inlet temps when under boost?

You should have the main table set to suit off boost cruise and then use the charge temp table to pull timing for the extra heat created by the blower.
vp304
Posts: 451
Joined: Wed May 19, 2010 2:21 pm

Re: Closed loop Lean cruise and idle and cruise timing

Post by vp304 »

Quipt4it hehehe
When on pc later immortality will have a look at that map. My boost map already has very low timing as it is any less timing suprise motor runs lol
immortality
Posts: 3416
Joined: Thu Apr 09, 2009 12:31 pm
cars: VH, VN, VS, VX

Re: Closed loop Lean cruise and idle and cruise timing

Post by immortality »

Not surprising really because you are running on 91.
vp304
Posts: 451
Joined: Wed May 19, 2010 2:21 pm

Re: Closed loop Lean cruise and idle and cruise timing

Post by vp304 »

immortality this the maps you talking about ?
Im guessing
numbers on left -04 to 152 are the intake air temp sensor in Celcius
And the top values 60-100
and 100-200 are map ?
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immortality
Posts: 3416
Joined: Thu Apr 09, 2009 12:31 pm
cars: VH, VN, VS, VX

Re: Closed loop Lean cruise and idle and cruise timing

Post by immortality »

Yup. That's them 60-100 is the n/a part of the map. 100-200 is the boost map and the temp scale is on the side.

You would need to log a few drives and work out what the normal IAT's are and then work out how much timing you need to remove as IAT's increase with boost.

The MAF based tunes are a bit different in how they are set up. I've found that once the engine is up to temp I'm seeing about 60°C IAT's in the LIM so I made that my zero position in the table. Then when the IAt's increase with boost I start to pull out a little timing and when the engine cold or the IAT's are below the normal operating temp I add a little timing in. This part of the MAP I'm still working on.
vp304
Posts: 451
Joined: Wed May 19, 2010 2:21 pm

Re: Closed loop Lean cruise and idle and cruise timing

Post by vp304 »

Thanks immortality. I thought there had to be a table like this somewhere in the tune
Say 20deg c day outside temp in traffic i see around 80deg iat in LIM
On dyno with bonnet open or on street are both very similar.
I see up to around 90 95 deg iat in LIM after a pull.
Using a vs style super 6 cold air intake but thinking of putting a 4 inch hole under air box to try get colder air again into the engine.
immortality
Posts: 3416
Joined: Thu Apr 09, 2009 12:31 pm
cars: VH, VN, VS, VX

Re: Closed loop Lean cruise and idle and cruise timing

Post by immortality »

Definitely need a better CAI to try and get those IAT temps down at cruise as that will improve your ignition timing/knock limit.

Are you still on a bog stock L67?
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