Let's see your lean spool disable Fuel Maps

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Jun 3, 2008 | 10:23 AM

#16

merkzu

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From: Twin Cities, MN

Quote:

Originally Posted by racer135

An interesting thing is that you are not modifying the map area where load is less than 140, not even on the RPM ranges from 2500 to 7000. On this area there will be an impact in AFR due to changes in lean spool, any issues with that? Have you seen any changes in your wideband? Looks like the number difference between lean spool enable and disable is about 1 point.

By the time it would reach 2500 rpm (lean spool activate point) it would already be over that load, so I don't think it would affect that area of the map. I start my pulls at 2500-3000 and never see it

Jun 3, 2008 | 12:02 PM

#17

RazorLab

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From: Mid-Hudson, NY

Quote:

Originally Posted by merkzu

Also turning lean spool off fixed my issues with richening AFR in higher gears

This is the biggest advantage, in my book, of turning it off.

Jun 3, 2008 | 04:43 PM

#18

Chabada15

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From: Long Island, NY

lean spool is a definate must, i did it cause everyone said it was more consistent and you really dont understand that untill your trying to tune over the course of a few days and it doesnt change from day to day like crazy

i herd that the new version of ecuflash is gunna have that as a feature (disable lean spool)

Jun 6, 2008 | 05:33 PM

#19

racer135

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From: Puerto Rico

By looking at the stock fuel maps of an EVO 8 it looks like lean spool does not happen at the same RPM at all loads. It is close to 2500 rpm for higer loads (higher than 160) and it apperas to occurs at higher rpms at lower loads (70~160). It doesnt look like its doing anything for a really low loads (less than 70). In addition the transition point in the low octane map appear to be about 50 rpm sooner. Have anyone notice this. It is clearly seen by looking at the stock fuel maps.

Aug 8, 2008 | 01:55 PM

#20

khara

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N.m

Last edited by khara; Aug 9, 2008 at 12:11 AM.

Aug 8, 2008 | 03:00 PM

#21

inco9nito99

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From: Roselle, IL

Quote:

Originally Posted by khara

Lean spool VS Rich spool.
I remember reading about Rich spool and how is it better to the Turbocharger!
So that should be the next thread.

uh...

Aug 8, 2008 | 03:45 PM

#22

nj1266

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From: USA

Quote:

Originally Posted by tephra

stock the ECU has "lean spool enabled" this means that the ECU will lean out the fuel map by 'about' 1 full AFR point.

most tuners/people "disable lean spool" to remove this affect, and then manually lean their fuel map out.

lean spool has a lot of "unknowns" in its operation - so rather than putting up with random things happening _we_ turn it off

So generally speaking you add 1 full AFR point to the fuel map when you disable lean spool?

I want to try disabling lean spool on my car and I do not want to log the car pig rich. Adding 1 full AFR point should get me close and then I can fine tune it from their. Correct?