Fitzauto
Fitzauto Dork
4/16/20 4:08 p.m.

Howdy all,

 

Ive just about finished getting my MS3 put together (using this kit: https://www.diyautotune.com/product/megasquirt-iii-w-pcb-v3-0-unassembled-kit-with-black-case/)

 

I want to run an electronic boost solenoid so I bought the mod kit (https://www.diyautotune.com/product/megasquirt-boost-control-mod-kit/)

 

I am not an expert when it comes to reading wiring diagrams and was wondering if anyone could explain how it gets wired up?

MadScientistMatt
MadScientistMatt PowerDork
4/17/20 7:57 a.m.

The circuit our boost mod uses is a bit different than the one in the manual - we've found this transistor has a higher switching speed than a TIP122. The catalog listing seems to make the picture of the circuit tiny, though; here's a full size version. MS3 uses the same points as an MS2.

Note that an MS3X card already has a boost output, if you're planning on using one.

Fitzauto
Fitzauto Dork
4/17/20 12:15 p.m.

In reply to MadScientistMatt :

Sadly no MS3X for now. Trying to keep to my self imposed budget. Thanks for the blown up photo and confirmatin on the pins being the same. 

Paul_VR6 (Forum Supporter)
Paul_VR6 (Forum Supporter) SuperDork
7/7/22 7:48 a.m.

Boost canoe?

That being said I haven't had an issues with good control with the TIP122 circuit vs the IRLZ44. 

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