Megasquirt fuel & timing maps

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jesusno2
Driving Mom's Station Wagon
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Megasquirt fuel & timing maps

Post by jesusno2 »

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

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Fuel map

Image
suck it!
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Matt Cramer
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Re: Megasquirt fuel & timing maps

Post by Matt Cramer »

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.
Matt at DIYAutoTune.com - Megasquirt ECUs, fuel injectors, wideband O2 sensor systems, and more
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modulation
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Re: Megasquirt fuel & timing maps

Post by modulation »

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

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

Post by Matt Cramer »

100 kPa is no boost, and 200 is 14.7 psi. So 270 would be 25 psi of boost.
Matt at DIYAutoTune.com - Megasquirt ECUs, fuel injectors, wideband O2 sensor systems, and more
Nissan plug and play engine management now in stock!
jesusno2
Driving Mom's Station Wagon
Posts: 47
Joined: Sat Nov 14, 2009 10:06 pm
Location: dallas, oregon

Re: Megasquirt fuel & timing maps

Post by jesusno2 »

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.
suck it!
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