Dual VR V2.1

http://jbperf.com/dual_VR/index.html
Woznaldo
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Joined: Sat Jul 08, 2017 6:44 am

Re: Dual VR V2.1

Post by Woznaldo » Mon Jul 15, 2019 10:56 am

Hopefully one final question. My V2.2 board previously ran EDIS, most of the mods were removed, but a jumper between the bottom of R10 and the banded side of D9 still remains. There is also the 1K resistor in place of D8. Does any of this need to be removed for either the Dual VR Conditioner of the 4 Channel Inj/IGN boards?

jbelanger
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Location: Quebec, Canada
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Re: Dual VR V2.1

Post by jbelanger » Mon Jul 15, 2019 5:57 pm

That's on the input side so that has no impact on the 4 channel board. And for the dual VR board, this whole circuit should be bypassed. You should remove C11 and R11 and connect the output of the dual VR board (OUT1 or 2) to a pad that connects directly to the CPU on IRQ-1 (pin 14 on the CPU). I don't have a V2.2 board in hand so I'm working from schematics but you should be able to find which pad (on C11 or R11) goes to the CPU using a multimeter.

Jean
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Woznaldo
Posts: 8
Joined: Sat Jul 08, 2017 6:44 am

Re: Dual VR V2.1

Post by Woznaldo » Tue Jul 16, 2019 3:38 am

Thanks Jean, I checked the schematic, but was still a little unsure. I’ve connected directly to U1 pin 11 on the underside of the board.

I’ll throw it on my Jimstim later and check that all is well. I’ll have to check how to connect the 2nd trigger, but happy with using the IGN leds for injectors and IAC1 & 2 for ignition )2 at a time).

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