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Old 10-10-2012, 04:11 PM   #321
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The ******* slave is dead!!!
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Old 10-10-2012, 04:28 PM   #322
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When I plug in VVTuner RPM in TS shows 0. Looks like I'm fucked. :(

So, What's the fix?
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Old 10-10-2012, 04:30 PM   #323
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How exactly are CKP and CMP wired to VVTuner?
Do you see RPM in MyVVT?
How exactly are CKP and CMP wired to MegaSquirt?
What model MegaSquirt hardware are you running?
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Old 10-10-2012, 04:35 PM   #324
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He is running the Enhanced MS2.

His adapter harness looks like this:



I included a dummy "loopback" DB-15 connector that connects pin 1 with 3, and 2 to 4. My understanding is that the engine runs when he has the dummy installed on the harness instead of the VVTuner, and no RPM when he installs the VVTuner.

Trey, you need to use the VVTuner software to set the trigger output on the VVTuner to NB2 inverted.
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Old 10-10-2012, 04:53 PM   #325
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I never switched it, thanks. NOw it appears to be working. I'll address the slave cylinder then go for a drive. I'm very excited.
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Old 10-10-2012, 05:10 PM   #326
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Yay yet again!
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Old 10-10-2012, 08:00 PM   #327
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The car drives good. How can I check to be sure the VVT is actually working and adjusted correctly?

Man this is great, 80mph at 3600rpm is nice to have again, this will be a great road trip car. I got it road tuned and PW is signifcanly lower in cruise at 80mph, over one point and 500rpm lower. I expect a significant increase in fuel economy. I will put more spark in it later because right now it's very slow, lol. Although slow, it drives better and there's no more smoke.
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Old 10-10-2012, 08:22 PM   #328
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So here is some weird ****. The engine was puking oil out the oil-pressure sender port. When I tightened that up, I broke-off the connector. So, it's not connected but my oil pressure gauge still works. Um...what?
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Old 10-10-2012, 08:25 PM   #329
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How do you guys recommend I check-up on the VVTuner to make sure there are no sync problems? The loss-sync counter in MLV shows nothing so hopefully I'm home free.

Is the out of the box table for the VVtuner optimized for the cam, or should I look for more power on the dyno/higher AFR (more air = more power)
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Old 10-10-2012, 11:07 PM   #330
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Okay, green car is totally getting dat vvteez and a fancy cam.
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Old 10-10-2012, 11:15 PM   #331
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Trey, please post you AFR, Spark and VVT tables after you get it tuned and sorted out.

Thanks,
-Raj
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Old 10-11-2012, 02:10 AM   #332
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Quote:
Originally Posted by redrider706 View Post
Trey, please post you AFR, Spark and VVT tables after you get it tuned and sorted out.

Thanks,
-Raj
I believe the VVT table is "optimized" by DIY meaning the tuned the cam in house, on their dyno, with all the time in the world to make it perfect.

I don't like this 3000rpm dip in VE:

I don't have endless time on the dyno to play with it and since I can't do it all from one computer, simutaneously, I'm hesitant to jack with it. However, I wonder if I can get rid of that dip in efficiency by adding some cam angle at 3k?
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Old 10-11-2012, 02:24 AM   #333
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Look here: https://www.miataturbo.net/megasquir...-tuning-64590/

I'm currently running something like Y8s' table. I don't have that drastic drop in VE at 3400.
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Old 10-11-2012, 02:47 AM   #334
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What is max retard?

Also, VVTuner's interface kind of drains my will to live.
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Old 10-11-2012, 02:49 AM   #335
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According to my current min and max absolute cam angle settings (319-275), 44 degrees.
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Old 10-11-2012, 02:51 AM   #336
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Quote:
Originally Posted by Bryce View Post
According to my current min and max absolute cam angle settings (319-275), 44 degrees.
That's 44* retard right, max advance is 0?

I was under the impression that once someone figured-out the best table, that was the only table to use considering all stock VVT cams are the same. Is this wrong?
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Old 10-11-2012, 02:57 AM   #337
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Quote:
Originally Posted by hustler View Post
That's 44* retard right, max advance is 0?

I was under the impression that once someone figured-out the best table, that was the only table to use considering all stock VVT cams are the same. Is this wrong?
44* Advance. Advancing yields more low-end power, retarding yields more top-end power, generally.

I get the feeling that there is an ideal table that everybody should use.
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Old 10-11-2012, 03:04 AM   #338
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Quote:
Originally Posted by Bryce View Post
44* Advance. Advancing yields more low-end power, retarding yields more top-end power, generally.

I get the feeling that there is an ideal table that everybody should use.
I need to stop comparing this to "advancing the cam gear on my track car" because the two are different animals. I made 5 new VVT tables I'm going to try tomorrow and see which ones yeild the largest VE values. I also hope this fixes the AC idle issue which is back, but different. That last engine was definitely in bad shape, this one idles significantly better.
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Old 10-11-2012, 03:06 AM   #339
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Quote:
Originally Posted by hustler View Post
I need to stop comparing this to "advancing the cam gear on my track car" because the two are different animals.
Totally the same, except VVT lets you advance and retard on demand. If you were to continue advancing the cam gear on the track car, you would start to notice a loss of top-end power and gain of low-end power.
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Old 10-11-2012, 03:09 AM   #340
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Quote:
Originally Posted by Bryce View Post
Totally the same, except VVT lets you advance and retard on demand. If you were to continue advancing the cam gear on the track car, you would start to notice a loss of top-end power and gain of low-end power.
I understand that, but I don't have a TDC reference with the VVT engine like I did the 99 engine.
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