How PW1 and PW2 could be different?

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Re: How PW1 and PW2 could be different?

Postby martroy » Sun Sep 24, 2017 7:12 pm

Matt Cramer wrote:JS4 to ground.


Will give a try and report back.
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Re: How PW1 and PW2 could be different?

Postby martroy » Tue Sep 26, 2017 4:48 pm

I've installed a 0,1 uf Cap between JS4 and GRND and now, with KOEO and clutch pushed in, I get some variation, take a look on the datalog. With clutch release, everything is stable.

Any idea?
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Re: How PW1 and PW2 could be different?

Postby billr » Tue Sep 26, 2017 8:20 pm

What is the specific data field that is worrying you?
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Re: How PW1 and PW2 could be different?

Postby martroy » Wed Sep 27, 2017 2:52 am

Adc7.

Doesnt remains to 0 when clutch is pushed in. When looking voltage at JS4, its constant.
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Re: How PW1 and PW2 could be different?

Postby billr » Wed Sep 27, 2017 9:24 am

How about posting a similar log, but use the space-bar to delineate when the clutch pedal is pushed down. Something like single space-bar when pedal is pushed, double bar when pedal is released.
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Re: How PW1 and PW2 could be different?

Postby martroy » Wed Sep 27, 2017 12:09 pm

I could if needed. Already done that test and remains 1023 when clutch is released.

The fluctuation when clutch in is only since cap installed. My concern us: why?

Will have to test on the road if it fix the "main" issue: flat shift yriggered without any input (clutch).
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Re: How PW1 and PW2 could be different?

Postby billr » Wed Sep 27, 2017 12:37 pm

What quality is the switch? It may just have a bit more "on" resistance than you would like. The ADC counts look low enough to me that I think it will still be a TTL "low", may be no problem now.
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Re: How PW1 and PW2 could be different?

Postby martroy » Wed Sep 27, 2017 6:09 pm

Will give a try once I get some minutes and report back. Thanks
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Re: How PW1 and PW2 could be different?

Postby martroy » Tue Oct 03, 2017 2:59 pm

Still having issue, very strange. I did all you guys recommended me. On that datalog, launchcontrol and flatshift was disabled and got a RPM spike. What could cause this and wondering if that might be the same issue since the beggining but didnt catch it in logs.
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Re: How PW1 and PW2 could be different?

Postby billr » Tue Oct 03, 2017 5:04 pm

Did you ever post an MSQ? I browsed through this thread, didn't find one. Regardless, post the current MSQ.
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Re: How PW1 and PW2 could be different?

Postby martroy » Tue Oct 03, 2017 5:51 pm

billr wrote:Did you ever post an MSQ? I browsed through this thread, didn't find one. Regardless, post the current MSQ.


Yes I did but removed them since. Here's a new one.
Last edited by martroy on Thu Nov 02, 2017 11:49 am, edited 1 time in total.
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Re: How PW1 and PW2 could be different?

Postby Matt Cramer » Wed Oct 04, 2017 7:57 am

martroy wrote:Still having issue, very strange. I did all you guys recommended me. On that datalog, launchcontrol and flatshift was disabled and got a RPM spike. What could cause this and wondering if that might be the same issue since the beggining but didnt catch it in logs.


ADC is reading reasonably; with launch control locked out I can't see what effect it is having on status codes.

For the RPM spike, try noise filtering - start with tach period rejection and a 35% to 40% percentage setting.
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Re: How PW1 and PW2 could be different?

Postby billr » Wed Oct 04, 2017 9:32 am

"With "Basic Trigger" it is possible that a noise pulse came in generating a false high RPM which tripped the rev limiter briefly. With the relatively slow speed of datalogs (compared to the engine) you won't always capture that.

James"



With the launch issue resolved, we are back to the above, correct?
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Re: How PW1 and PW2 could be different?

Postby martroy » Wed Oct 04, 2017 9:57 am

Matt Cramer wrote:For the RPM spike, try noise filtering - start with tach period rejection and a 35% to 40% percentage setting.



Will give a try. Is there some change "hardware" I could do instead of doing a change in software?
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Re: How PW1 and PW2 could be different?

Postby martroy » Wed Oct 04, 2017 9:57 am

billr wrote:With the launch issue resolved, we are back to the above, correct?



I guess ! lol. Will try what Matt suggested.
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Re: How PW1 and PW2 could be different?

Postby billr » Wed Oct 04, 2017 12:45 pm

With eight cylinders, a single coil, and wanting to rev to 6000+ you are probably already marginal on dwell/spark time available. Would you consider stepping up to missing-tooth and wasted-spark? That might eliminate the present problems as well as giving you a hotter spark and more accurate spark timing... lot's of "wins" there for you.
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Re: How PW1 and PW2 could be different?

Postby martroy » Wed Oct 04, 2017 7:53 pm

billr wrote:With eight cylinders, a single coil, and wanting to rev to 6000+ you are probably already marginal on dwell/spark time available. Would you consider stepping up to missing-tooth and wasted-spark? That might eliminate the present problems as well as giving you a hotter spark and more accurate spark timing... lot's of "wins" there for you.


I guess I'm not the only one that want to rev 6500 with a single coil and MSD ignition box without wasted-spark setup ? Do you know how to setup the noise filter curve? I did what Matts says regarding 30% but not sure about the curve itself.

What exact steps I need to follow to convert to wasted spark a SBF TFI setup ?

thanks.
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Re: How PW1 and PW2 could be different?

Postby Matt Cramer » Thu Oct 05, 2017 6:04 am

If using an MSD box, you should be able to hit 6500 RPM no problem. A TFI module on its own would be marginal for that application.

Noise filtering is explained here.

http://www.msextra.com/doc/pdf/html/Meg ... .4-89.html
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Re: How PW1 and PW2 could be different?

Postby martroy » Thu Oct 05, 2017 9:07 am

Matt Cramer wrote:If using an MSD box, you should be able to hit 6500 RPM no problem. A TFI module on its own would be marginal for that application.

Noise filtering is explained here.

http://www.msextra.com/doc/pdf/html/Meg ... .4-89.html


Already read that link but about the curve, do I leave it by default or something I should do?


Thanks
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