Megasquirt accel enrichment and in cooperate air fuel.

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Megasquirt accel enrichment and in cooperate air fuel.

Post by dj_smooth » Fri Oct 30, 2015 5:39 am

I'm having issues with take offs and in between shifts. I feel like I understand the concept, but yet I unable to correctly tune my acceleration enrichments. My tune and log are in the link. I've compared my ae to supakat's. From what I read, in cooperate air fuel is pretty like driving with VE analyze on all the time. Im currently using that and auto tune to get my afr in the ball park. I think I need to get my ve table correct and then tune accel enrichment. After that tune the VE table based off of what the accel enrichment is doing from idle to go in 1st gear? I need guidance and suggestions. My afr isn't predictable and throttle response is sub par.

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Re: Megasquirt accel enrichment and in cooperate air fuel.

Post by BigLoukaT » Fri Oct 30, 2015 6:26 am

Incorporate AFR is not what you're thinking. That setting makes your AFR table part of the calculation for fueling and allows your ve table to closer represent to the actual volumetric efficiency.
It does not do any real time correction, that is the job for ego.

A note on incorporate AFR: set it once either on or off (recommend on) and leave it alone. Swapping back and forth requires the ve table be retuned.

No feedback on your ae at the moment, but I'm working through the same on my tune. Will look at your files later.
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npx from 240sxforums wrote:i figure from my very limited knowledge about the 240 and under the hood about cars in general i would follow the sr20det trend.

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Re: Megasquirt accel enrichment and in cooperate air fuel.

Post by Ihiryu » Wed Feb 03, 2016 3:49 pm

I always had issue with using TPS based AE. MAP makes it a bit better/easier for me. Personally if you're using a MS3 then you can use accel pump, and that is super easy. But if you're on a MS2 board, then I would try 100 map based settings just to get you in the ball park. Generally going to MAP based will get the car going, but will cause it to go rich. Then at that point you will dial it down, and blend between MAP and TPS.

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Re: Megasquirt accel enrichment and in cooperate air fuel.

Post by Matt Cramer » Fri Feb 12, 2016 7:29 am

Big Lou did a good explanation of the Incorporate AFR Table feature. In short, you will want to tune the VE table first, then come back and tune the acceleration enrichment. The VE table is for the regular fueling, and needs to be correct - applying other modifiers on top of a bad VE table tune will result in the other modifiers getting skewed too.
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