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Discussion Starter #1
Getting ready to pull the trigger on the MSD rpm activated switch and other electronics to swap a 6.4 manifold onto my 5.7

Everyone ive seen that does the swap uses this MSD box

MSD 8969 Digital RPM Window Switch https://www.amazon.com/dp/B000COOOG0/ref=cm_sw_r_cp_api_i_HmC3Db8QQNAE8

But ive come across other options, such as this little guy

Intellitronx N3210 Digital RPM Activated Window Switch https://www.amazon.com/dp/B0721TKT3V/ref=cm_sw_r_cp_api_i_onC3Db4RABHDB


Now it seems like both of these were created with N2O in mind, but if the MSD can be re-purposes, why not the other? Is there something crucial im missing here?

Besides the fact that MSD is a known brand with better support, and probably better quality electronics, i think they’ll function the same...


Thoughts?
 

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Discussion Starter #2
No body have any bright ideas? Dont want to spend the $180 if i can get by with a $60 switch....
 

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The MSD box can be set to run a 1 cylinder engine mode. That is what you need, because you will be operating off of one injector. If the other window switch can't be set to 1 cylinder mode then it will not work. I remember looking at different RPM window switches and found that the MSD 8969 was the only one that would work two years ago when I did my 6.4 intake swap. I found that the circuit boss was a big waist of money, a relay and a plug in extra fuse circuit you fined at the auto parts store and the pig tail for the actuator on the intake is all you need.
 

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Wish someone would try turning on the code in the PCM using HPTuner or something. Maybe someone has and it wouldn't work.

I've heard the info is there in the R/T PCM, but haven't heard of anyone making a run at it.
 

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Sounds like you can get the PCM to control it. Found posts on other forums that stated that a couple of places have made it work.

I should have saved links and posted them here but didn't think about it until just now.
 

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Sounds like you can get the PCM to control it. Found posts on other forums that stated that a couple of places have made it work.

I should have saved links and posted them here but didn't think about it until just now.
For now ill being going with the msd box because i dont want to switch to hp tuners until i get my cam swap going with some head work...

So ill be sticking with my diablo and getting a custom tune with hemifever once i have the manifold on.

Would definitely be interested in seeing support/claims from other tuners saying they can program it in. I dont see why not
 

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This is what I used to wire mine in, plus a bosch 30 amp relay and an inline fuse for the power wire to the relay(12 volt battery, which is the main power wire for the MSD) . You can buy them in any auto parts store (O'Reilly, Auto Zone, Advance Auto, or Napa). I used a 20 amp fuse circuit(key on) in fuse box and 5 amp fuse in the second circuit for the trigger wire for the relay. Been working perfect for 2 years now, mounted it next to the fuse/power box and the wires on the MSD 8969 were more than long enough to reach the # 8 injector and pig tail for the SRV valve.
It should cost you less than $20 to wire in the MSD.
 
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