SR20 COP ms3 extra setup question

General support questions and announcements for MS3. See also MS3 manuals.

Moderators: jsmcortina, muythaibxr

Post Reply
Anarchistchiken
MS/Extra Newbie
Posts: 1
Joined: Fri Sep 22, 2017 6:16 pm

SR20 COP ms3 extra setup question

Post by Anarchistchiken »

I have an SR20 with three wire coil on plug packs, is there any way to use the stock Nissan ignitor with the megasquirt so that I don't have to buy an ignition chip?

Sorry if this is in the wrong forum, I'm new here
Matt Cramer
Super MS/Extra'er
Posts: 17499
Joined: Thu Apr 16, 2009 8:08 pm

Re: SR20 COP ms3 extra setup question

Post by Matt Cramer »

Sure, just run the MS3X spark outputs to the stock ignition module; it takes a standard 5V logic level signal.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
nipponi
Helpful MS/Extra'er
Posts: 48
Joined: Thu Sep 21, 2017 6:46 am
Location: Finland

Re: SR20 COP ms3 extra setup question

Post by nipponi »

I´ve got ms3X and fwd sr20de with stock CAS, coil+distributor system.
I´ve wired my ms3 internally like MS3XV30 instructions tells me to do in section 5.2.3.
(not sure should it be like 5.2.4) and i´m planning to change that original coil+dizzy into a Vw 4 way logic coil 06A905097.
Is my internal wiring ok or do I need to change it to 5.2.4?
CAS signal needs pull up, like in 6.40?
Power from TPS Vref and 330ohm resistors to both signal wires?
Does that have any affect to tps signal?
Ignition signals goes thru x-board like in logic coil setup should go.
Software settings like in 6.40 and spark output Going High?
Nissan Almera Gti -97. Ms3+extra Flex fuel project.
Spiffy
Helpful MS/Extra'er
Posts: 119
Joined: Mon Sep 19, 2016 1:57 pm

Re: SR20 COP ms3 extra setup question

Post by Spiffy »

nipponi wrote:I´ve got ms3X and fwd sr20de with stock CAS, coil+distributor system.
I´ve wired my ms3 internally like MS3XV30 instructions tells me to do in section 5.2.3.
(not sure should it be like 5.2.4) and i´m planning to change that original coil+dizzy into a Vw 4 way logic coil 06A905097.
Is my internal wiring ok or do I need to change it to 5.2.4?
CAS signal needs pull up, like in 6.40?
Power from TPS Vref and 330ohm resistors to both signal wires?
Does that have any affect to tps signal?
Ignition signals goes thru x-board like in logic coil setup should go.
Software settings like in 6.40 and spark output Going High?
Not sure about the DE but the DET cas needs a 5V pullup so I assume it's the same for a de, worst case if you don't do it is no signal. In that case just add the pullup

Sent fra min HUAWEI VNS-L31 via Tapatalk
nipponi
Helpful MS/Extra'er
Posts: 48
Joined: Thu Sep 21, 2017 6:46 am
Location: Finland

Re: SR20 COP ms3 extra setup question

Post by nipponi »

Ok, I think also that there is´t really any difference in basic operation of those dizzys. Any idea about the rest of my questions? Is that internal wiring ok or do I need to take that jumper wire and resistor off? I´m trying to get this one running in about week or so. Mot check is soon, so I need to get it running and tuned before that.
Nissan Almera Gti -97. Ms3+extra Flex fuel project.
jsmcortina
Site Admin
Posts: 39585
Joined: Mon May 03, 2004 1:34 am
Location: Birmingham, UK
Contact:

Re: SR20 COP ms3 extra setup question

Post by jsmcortina »

I've tested the SR20 CAS here and I had it working ok. That's where the settings in the manual came from.

James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
New users, please read the "Forum Help Page".
Post Reply