Momentary Small Lean Spike at VTEC Point

K-Series Programmable ECU Calibration updates / downloads
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atlex
Posts: 6
Joined: Mon May 02, 2022 12:43 pm

Momentary Small Lean Spike at VTEC Point

Post by atlex »

Hi Folks,

I've got a small lean spike in WOT when I hit the VTEC point.

It's small but it's annoying me in an OCD sense. I'm not seeing a loss of performance but no matter what I've tried, I can't seem to tune it out.

The map is giving sensible WOT AFRs between 13.1 and 12.7 (I've aimed for about 13.0)

<VTEC>
It goes 12.6 13.6 12.8

I want to know, is there any way to tune it out, or should I just ignore it ?

Car is a swapped MR2 Spyder with CAI/Cone Filter & 4-2-1 Header. Stock internals EP3 K20A2. WB is an AEM-X.

Datalog, Map and Photo of the Graph attached.

Thanks!

Also if anyone's bored and wants to review my map, I'd appreciate that. It's a road tuned map I've prepared for pleasure/experience before I swap to an RRC intake manifold and spend money on dyno time. 50 degree cam at 4500 because it sounds so good.
Attachments
193-wot-tuning.kdl
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193-wot-tuning-based-on-190.kal
(163.15 KiB) Downloaded 61 times
193-lean-spike-4600RPM.PNG
193-lean-spike-4600RPM.PNG (32.12 KiB) Viewed 362 times
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Spunkster
Site Admin
Posts: 22737
Joined: Fri Sep 20, 2002 5:06 pm
Location: Hondata

Re: Momentary Small Lean Spike at VTEC Point

Post by Spunkster »

Don't worry about it, that is normal when the cam changes from low to high.
atlex
Posts: 6
Joined: Mon May 02, 2022 12:43 pm

Re: Momentary Small Lean Spike at VTEC Point

Post by atlex »

Thank you, that's good to know ^^

As for the fuel tip in - have I been aggressive enough ? I don't get bog. I'm not sure how much transient leans matter.
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