Megasquirt fuel & timing maps

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Megasquirt fuel & timing maps

Postby jesusno2 » Sun Sep 11, 2016 5:52 pm

Ka24det 550cc injectors old 280zx T3 what do you guys think about these timing and fuel maps cars runs really rich and idles at like 1500 rpm i havent hooked my wideband up yet just fired it on these maps

Ignition map

Image


Fuel map

Image
suck it!
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Re: Megasquirt fuel & timing maps

Postby Matt Cramer » Tue Sep 13, 2016 6:24 am

Engines tend to be more linear in boost than out of it - and unless this is in a speedboat, they typically spend more time out of boost than in it. So I typically recommend dedicating 8 rows to 100 kPa or less, and 4 to the boost region - this typically gives better drivability.

If you have it idling rich on a VE in the 20s, this is often a sign your dead time is set too high.

And get that wideband in there - this will tell you a lot more about how correct the VE table is for your specific engine than a forum post will.
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Re: Megasquirt fuel & timing maps

Postby modulation » Thu Sep 15, 2016 3:20 pm

What columns go to what boost levels on the timing map?

I.E. 270 = 10psi ?
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Re: Megasquirt fuel & timing maps

Postby Matt Cramer » Fri Sep 16, 2016 6:07 am

100 kPa is no boost, and 200 is 14.7 psi. So 270 would be 25 psi of boost.
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Re: Megasquirt fuel & timing maps

Postby jesusno2 » Mon Sep 19, 2016 7:07 pm

well i got my fuel map sorted out the car idles high (about 1100 rpm) takes throttle pretty well stumbles if ya stab it though. and the starter kickback is nuts i ordered a diy wheel see if that helps.
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