S2000 Engine Management Engine management topics, map and advice.

Cold start ethanol tuning

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Old May 28, 2023 | 12:49 PM
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Default Cold start ethanol tuning

I've been running on E85 for many years but ever since I added a supercharger last year it's been a real struggle to start up.
Normally I crank it for 4-5s with no tendency to start, pause for a few seconds and then try again, most of the time it will start up at third try.
Once started it runs great and tune seems to be on point.

With a really heat soaked engine bay problems often get even worse and it can get impossible to get it started.
On instances as this it usually gets going after a 10-15min wait with hood open.

Car is running on Hondata Kpro4 and the only table I've been messing with really is Cranking Fuel.
Here is how my numbers look like compared to stock bellow, I added both C and F temp tables.


Does it look crazy? Any other tuning tables I should look at and edit?
I've got an ethanol content sensor that reads around 80% for the in tank fuel.
I got tons of logs, let me know if you want to look at a graph with more data.
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