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Old 10-21-2011, 11:27 AM   #1181
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Any updates from the machine shop about your head?
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Old 10-21-2011, 12:07 PM   #1182
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Any updates from the machine shop about your head?
Nope, I'll start bugging them next week. I still have to decide if I'm putting water injection on this thing or not. I suppose I can fire the solenoid off the Nitrous output in MS, right?
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Old 10-21-2011, 12:19 PM   #1183
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How many CMP teeth are in there?

What is the best way to set this up on my car? Do I need to convert my 12 tooth wheel to a 12-1, and if so which tooth do I cut? How do I get a CMP for sequentail? If I cut the guts out of my CAS, how can I be certain the single-tooth triggers after #4-decompression?

I know how to measure the CKP #1 angle (protractor), how do I measure the angle of the CAS due to its unfortunate location? I'm getting really tempted to get a 99 Valve cover and make this easier.
It's the factory 4-2 CAS. I didn't modify it. All I did was enable seq. fuel in my software and run the correct outputs to the correct locations.
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Old 10-21-2011, 12:22 PM   #1184
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It's the factory 4-2 CAS. I didn't modify it. All I did was enable seq. fuel in my software and run the correct outputs to the correct locations.
So how does the computer know cam phasing if you're running a 2-tooth cmp trigger wheel?
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Old 10-21-2011, 12:32 PM   #1185
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i dunno, it just does? I don't question, I just accept.
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Old 10-21-2011, 05:52 PM   #1186
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i dunno, it just does? I don't question, I just accept.
Recipe for a worry free life.


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Nope, I'll start bugging them next week. I still have to decide if I'm putting water injection on this thing or not. I suppose I can fire the solenoid off the Nitrous output in MS, right?
What WI kit do you have?
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Old 10-21-2011, 06:54 PM   #1187
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I don't question, I just accept.
in the butt
Very typical of a Miata owner
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Old 10-22-2011, 11:50 AM   #1188
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Recipe for a worry free life.




What WI kit do you have?
SPD579 has a sweet Snow Performance kit he'd let go of.
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Old 10-23-2011, 10:25 AM   #1189
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What WI kit do you have?
I don't have one. I assumed I'd get a new Devil's Own kit. I don't need failsafe or a progressive controller, I just need a tiny .5 or 1gph nozzle on a toggle switch so I can run it only at the track.

Again though, I still need a better picture of what killed the intake valves. If it's a mess of wet-out, then I have another problem.

This week I'm trying to get all the fuel line parts ordered, hopefully get them built, then next week make a decision on engine management and start trimming/repairing/modifying the wiring situation. I still have to get a few things done before this car can run again.
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Old 10-24-2011, 07:46 PM   #1190
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So how does the computer know cam phasing if you're running a 2-tooth cmp trigger wheel?
Because the 2 teeth are not the same. One is bigger than the other, and they are also not placed evenly between crank teeth. I sometimes get lost in the scope traces and techno babble about rising and falling edges, but suffice it to say, the ECU can tell which cam tooth is which.

Pic of the CAS internals showing asymmetry is here:
http://www.msextra.com/doc/ms2extra/MS2-Extra_4g63.htm

Scope traces here, if you care:
https://www.miataturbo.net/megasquirt-18/sanity-check-inverted-primary-trigger-required-jimstim-29726/
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Old 10-24-2011, 07:56 PM   #1191
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Thanks. I still don't understand how to set this up in MS2 though. I'm learning, thanks for the help.
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Old 10-25-2011, 12:42 PM   #1192
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I had looked into going full sequential when I had MS2. The issue is that MS2 doesn't have enough outputs, so you have to add them. One way to do that is with jbperf's 4-channel board: http://www.jbperf.com/quad_ign_inj/index.html
And you would have to make some fairly simple modifications to the MS board and use the MS2 sequential code. Some details are here: http://www.jbperf.com/sequential/index.html

It didn't seem too complicated but it also didn't seem to be a common configuration among the members of this forum (not sure?) and I'm not exactly a trailblazer when it comes to this stuff. I'm sure I could have done it with the help of people on here and the msextra forums, but I wound up going MS3/X (I think the onboard datalogging swayed me, so I can stop using a poorly secured laptop on the track) which already has all the outputs you need and requires nothing besides hooking up a few wires to go full sequential.
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Old 10-25-2011, 03:14 PM   #1193
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I had looked into going full sequential when I had MS2. The issue is that MS2 doesn't have enough outputs, so you have to add them. One way to do that is with jbperf's 4-channel board: http://www.jbperf.com/quad_ign_inj/index.html
And you would have to make some fairly simple modifications to the MS board and use the MS2 sequential code. Some details are here: http://www.jbperf.com/sequential/index.html

It didn't seem too complicated but it also didn't seem to be a common configuration among the members of this forum (not sure?) and I'm not exactly a trailblazer when it comes to this stuff. I'm sure I could have done it with the help of people on here and the msextra forums, but I wound up going MS3/X (I think the onboard datalogging swayed me, so I can stop using a poorly secured laptop on the track) which already has all the outputs you need and requires nothing besides hooking up a few wires to go full sequential.
I think Hustler is going MS2 because he will be buying one of the Reverent setups. I think Rev is building an additional board that has sequential spark and fuel outputs.
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Old 10-25-2011, 03:16 PM   #1194
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yeah his expansion board handles a lot of extras so it frees up a **** load on the CPU. For example, it controls the Fan, freeing up one of the 5 outputs.
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Old 10-25-2011, 04:37 PM   #1195
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yeah his expansion board handles a lot of extras so it frees up a **** load on the CPU. For example, it controls the Fan, freeing up one of the 5 outputs.
It frees 2 outputs actually - so on a 94-05, it controls both fans if you have two, and you are still left with either 2 programmable outputs OR sequential ignition (which I don't recommend anyway unless you are running "ALL OF IT" amounts of boost)

MS Inputs/Outputs are:

JS0 - Boost control
JS2 - Tacho
JS4 - Knock in
JS5 - Multiplex in
JS7 - Launch in
JS10 - Cam in
JS11 - Programmable or Seq ignition D
D15 - Programmable or Seq ignition C
PE1 - Switch tables

Everything else is handled by my expansion board.
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Old 10-25-2011, 05:37 PM   #1196
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Yes, I'm going to Reverant's bauceness. However, this is for 1.6 electronics with a 99 engine running a CKP, CMP for phasing, and no AC, no PS...
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Old 10-25-2011, 06:13 PM   #1197
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Shoot me a PM for a killer deal on the AEM Water/Meth kit!

Awesome build too, nice work!

-Sam
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Old 10-25-2011, 06:50 PM   #1198
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So should I run water injection off MS or run it off one of the boost sensors in the DO kit (maybe AEM)? I want to trigger it at 160kpa and use a .5GPH nozzle.
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Old 10-25-2011, 08:18 PM   #1199
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It's a waste to run an AEM kit or the like if you're just going to just turn it wide *** open at 160kpa.

I'm running an AEM kit on my Ubercharged car, but I'm using all the fail safes and boost referenced ramping, as I'm not running an intercooler. Personally, I wouldn't run it at all if I was just going to run a Hobbs switch and turn the **** on at a certain boost level. I feel ghetto enough running it with 40 fail safe conditions, data logging, a flow meter, a pimp-tight constant-on pump/ variable pump head flow controller, etc, etc, etc.
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Old 10-25-2011, 08:40 PM   #1200
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Wait... Reverent, you don't recommend sequential? Large injectors or not it still provides a massive benefit IMO.
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