going lean

Tuning concepts, methods, tips etc.

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chilly
MS/Extra Newbie
Posts: 25
Joined: Thu Jul 02, 2015 5:51 pm

going lean

Post by chilly »

Can someone explain what is going on here, going way lean, what is telling it to do so? thank you.
slow_hemi6
Super MS/Extra'er
Posts: 4122
Joined: Fri May 07, 2004 3:33 am
Location: Australia

Re: going lean

Post by slow_hemi6 »

Is it because you are in decell and your VE is about 1/2 to 2/3 what it is at normal idle?
Find the Manuals up top under Quick links: Manuals. :RTFM:
Cheers Luke
chilly
MS/Extra Newbie
Posts: 25
Joined: Thu Jul 02, 2015 5:51 pm

Re: going lean

Post by chilly »

That seems so obvious,,, Thank you.
billr
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Posts: 6828
Joined: Sun May 15, 2011 11:41 am
Location: Walnut Creek, Calif. USA

Re: going lean

Post by billr »

No "vacuum advance" for the spark, maybe causing misfires that appear as lean.
chilly
MS/Extra Newbie
Posts: 25
Joined: Thu Jul 02, 2015 5:51 pm

Re: going lean

Post by chilly »

I added fuel to the ve table, will try it out tomorrow. This is all very new to me. I added 4 degrees timing and i cleaned up high rpm a little. Every thing I read says there is no way i should be maxed out on a 63lbs injector but can i really pull that much fuel high rpm?
billr
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Posts: 6828
Joined: Sun May 15, 2011 11:41 am
Location: Walnut Creek, Calif. USA

Re: going lean

Post by billr »

I see a duty-cycle approaching 100%, but not while it is lean. The lean only shows during decel. How about pointing to specific times in that most recent log, so I can be sure what you are questioning? Are these 63# injectors, or 60# as shown in the MSQ?
chilly
MS/Extra Newbie
Posts: 25
Joined: Thu Jul 02, 2015 5:51 pm

Re: going lean

Post by chilly »

thank you for catching that, they are 63lbs injectors
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