Bus bar for “sensor ground” allow expansion easily
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Bus bar for “sensor ground” allow expansion easily
Hi,
I was wondering if it would be ok to use a bus bar for all the sensor grounds to be wired to (and connected to megasquirt via one wire) it would allow easy expansion of sensors? Any problems with this
I was wondering if it would be ok to use a bus bar for all the sensor grounds to be wired to (and connected to megasquirt via one wire) it would allow easy expansion of sensors? Any problems with this
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- Super MS/Extra'er
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Re: Bus bar for “sensor ground” allow expansion easily
Use a lot (all?) of those MS ground pins, not just a single one, to connect to the bus.
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- Master MS/Extra'er
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Re: Bus bar for “sensor ground” allow expansion easily
I do the exactly that, a bus bar connecting to all my sensors and a single wire back to the MS unit's sensor ground (pin #7 Black w/ White stripe) wire. All those other ground wires are for noisy stuff like injectors, coils, etc.
MS3-Pro 1st Gen | Honda K24 Supercharged
MS3/MS3X | SB Ford 347 stroker
MS3/MS3X | SB Ford 347 stroker
Re: Bus bar for “sensor ground” allow expansion easily
Thanks mate! And for the other grounds that go to engine (I think 11 on ms3x) I was going to do the same as I can only get 6 20 gauge wires to the head. But then I found out they are all linked in the board anyway so just wire 3 from ms3 and 3 from the x card?? Surely that’s enough
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- Super MS/Extra'er
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Re: Bus bar for “sensor ground” allow expansion easily
I do 5 and 5 ground wires, 18 AWG. I would suggest doing the same. It seems that anybody who tries to do this differently has issues.Z32 TT wrote:Thanks mate! And for the other grounds that go to engine (I think 11 on ms3x) I was going to do the same as I can only get 6 20 gauge wires to the head. But then I found out they are all linked in the board anyway so just wire 3 from ms3 and 3 from the x card?? Surely that’s enough
But, yes a bus bar for sensor grounds, while over kill will work just fine.
Tha Toy: 1973 Datsun 240Z Turbocharged, and loads of fun, now MS'd
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Re: Bus bar for “sensor ground” allow expansion easily
So I went with 5 and 5 as per the manuals “power grounds” reading manual all today. I wanted to confirm that it would be ok and desirable to ground the shielded sheeth of my wires at the sensor ground also?
Btw ecu is talking to computer and all works ok
Btw ecu is talking to computer and all works ok
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- Master MS/Extra'er
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Re: Bus bar for “sensor ground” allow expansion easily
I would ground the shields to your power grounds. Shielding protects signal wires from electrical interference (i.e. noise). You don't want noise on your sensor grounds if possible.Z32 TT wrote:I wanted to confirm that it would be ok and desirable to ground the shielded sheeth of my wires at the sensor ground also?
MS3-Pro 1st Gen | Honda K24 Supercharged
MS3/MS3X | SB Ford 347 stroker
MS3/MS3X | SB Ford 347 stroker
Re: Bus bar for “sensor ground” allow expansion easily
In the manual it states to have the screened sheeth at sensor ground. I have attached a screenshot of the part of the manual
Re: Bus bar for “sensor ground” allow expansion easily
Just to confuse matters a little more, I like to split my grounds into three.
On the main DB-37 connector, I connect pins 1+2 together and use that for sensor ground. Then I connect pins 7+8 together and use that for shield ground. The remaining ground pins (9-19) go to the engine block.
And just to emphasize what the manual says: the shields should only be connected at the Megasquirt end, NOT at the sensor end.
On the main DB-37 connector, I connect pins 1+2 together and use that for sensor ground. Then I connect pins 7+8 together and use that for shield ground. The remaining ground pins (9-19) go to the engine block.
And just to emphasize what the manual says: the shields should only be connected at the Megasquirt end, NOT at the sensor end.
Eric Law
1990 Audi 80 quattro with AAN turbo engine: happily running on MS3+MS3X
2012 Audi A4 quattro, desperately in need of tweaking
Be alert! America needs more lerts.
1990 Audi 80 quattro with AAN turbo engine: happily running on MS3+MS3X
2012 Audi A4 quattro, desperately in need of tweaking
Be alert! America needs more lerts.