megajolt with Wideband O2

EDIS and Megajolt installation related topics. Be sure to review the <a href="http://www.autosportlabs.net/MJLJ_V4_vehicle_installation_guide">Vehicle installation guide</a>

Moderators: JeffC, rdoherty, stieg, brentp

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toomanyveedubs
Posts: 3
Joined: Fri May 14, 2010 7:03 am

megajolt with Wideband O2

Post by toomanyveedubs »

Hi All,

I am going to install my megajolt next week when i get the trigger wheel mounted and back from the machinist.

My question is about the wiring. Should i use the input port on the MJ to run a temperature sensor or connect it to the wideband O2 sensor i have ordered from Definitive Motorsports ?

And if i use one or the other, where do i program the changes in the software based on this input.

Thanks

brentp
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Posts: 6274
Joined: Wed Jan 24, 2007 6:36 am

Post by brentp »

Hi,

Apologies for the late reply. you can connect the sensor you prefer to the Aux input of the Megajolt and then calibrate it using the software.

See here for more help:
http://www.autosportlabs.net/MJLJ_V4_ve ... iary_Input
http://www.autosportlabs.net/MJLJ_V4_Op ... figuration
Brent Picasso
CEO and Founder, Autosport Labs
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toomanyveedubs
Posts: 3
Joined: Fri May 14, 2010 7:03 am

Post by toomanyveedubs »

Thanks for the reply. In your opinion, which sensor allows for better all around tuning.
And by tuning I mean general drivability and reliability from cold starts to good fuel economy.

Thanks.

brentp
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Joined: Wed Jan 24, 2007 6:36 am

Post by brentp »

Measuring AFR is probably the most critical part; if combined with a good dyno session you can get a nice profile of engine performance.

Temperature input is primarily useful for adjusting ignition advance for cold weather starts.
Brent Picasso
CEO and Founder, Autosport Labs
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damunk
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Joined: Mon Aug 05, 2013 8:44 pm

Post by damunk »

I've got the aem air fuel gauge. it's got 4 wires on the small connector.

1) red +
2) black -
3) blue : serial output
4) white : 0-5v

Which one would go to megajolt please to display air fuel line on the 'runtime' graph?

brentp
Site Admin
Posts: 6274
Joined: Wed Jan 24, 2007 6:36 am

Post by brentp »

the white 0-5v output would feed into the aux input of the megajolt unit. Note, the input would need to be scaled, see this guide. The scaling options are limited to whole numbers.

http://www.autosportlabs.net/MJLJ_V4_Op ... figuration
Brent Picasso
CEO and Founder, Autosport Labs
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