The Autonerdz Community Forums - WPS interpretation

Thomas Richardson Freshman Member Offline Posts: 9 Richland Washington USA	WPS interpretation Sep 19^th, 2011 at 6:06pm Got my new WPS500 today. Thanks Tom ) I had a car in the shop, took it out of the case, started using it in 3 minutes. Cool. Now, help me interpret correctly. I call this a burned valve. What is the correct call? Thanks. tr
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Mick

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Re: WPS interpretation
Reply #1 - Sep 19^th, 2011 at 6:32pm

Thomas Richardson wrote on Sep 19^th, 2011 at 6:06pm:

Now, help me interpret correctly. I call this a burned valve. What is the correct call?

Thomas
If you use the crank sensor along with the compression wave of cylinder 1 it will help you.

The fall of the compression wave indicates a pressure loss, how was its companion cylinder?

Did you use Toms custom probes (bar)?

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Mick

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daveyK

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Re: WPS interpretation
Reply #2 - Sep 19^th, 2011 at 6:40pm

Hello Thomas,

Congrats on the WPS Smiley

What are you working on?

It looks like the peak compression is low for most modern engines and the compression towers are uneven, the air is getting out of the cylinder faster then when compressing.

If you could add a CKP and the ignition sync for the cylinder you are testing that will help quite a bit.

dave

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daveyK Super Nerd Picogroup Offline (Retired) - Elevation: 525 feet Posts: 2,357 Hellertown, PA, USA Pennsylvania USA Gender:	Re: WPS interpretation Reply #3 - Sep 19^th, 2011 at 6:49pm Hello Mick, DAM your fast!! dave
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Thomas Richardson Freshman Member Offline Posts: 9 Richland Washington USA	Re: WPS interpretation Reply #4 - Sep 19^th, 2011 at 7:08pm Here is the good cylinder next to #3. It looks pretty good. I am just motivated to get good at this. thanks. tr I don't have the custom probe yet. Does it take a secret handshake to get?
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Thomas Richardson Freshman Member Offline Posts: 9 Richland Washington USA	Re: WPS interpretation Reply #5 - Sep 19^th, 2011 at 7:09pm OK, this is a 06 PT cruiser, this is cranking comp. cause the #2 and #3 cyl, you have to pull the intake.
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Mick LSD Guide Offline I learn every day Posts: 7,471 Toronto 400ft Ontario Canada Gender:	Re: WPS interpretation Reply #6 - Sep 19^th, 2011 at 7:24pm Thomas Richardson wrote on Sep 19^th, 2011 at 7:08pm: I don't have the custom probe yet. Does it take a secret handshake to get? Tom will let you know how to get them This is how we see them after fixing your files but we can’t get an accurate measurement. Great to compare waves with reference.
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Randy H. Super Nerd Picogroup Offline Tools are only as good as the Tech holding them Posts: 1,692 Bardstown, Kentucky Kentucky USA Gender:	Re: WPS interpretation Reply #7 - Sep 20^th, 2011 at 12:22am Thomas Richardson wrote on Sep 19^th, 2011 at 6:06pm: I call this a burned valve. What is the correct call? I would say the exhaust valve closed too soon on this capture. the piston is still on its way up when the valve closes and the waveform shows a pressure peak. At least thats how i see it....I could be wrong
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darren s Junior Member Picogroup Offline Posts: 50 loxton South Australia Australia Gender:	Re: WPS interpretation Reply #8 - Sep 20^th, 2011 at 3:55am Hi Thomas, one thing I try and do for better valve operation definition in the waveform is to restrict the intake. I use a cork rubbing block if inlet removed. Hard to do if solo though. darren
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daveyK

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Re: WPS interpretation
Reply #9 - Sep 20^th, 2011 at 5:45am

daveyK wrote on Sep 19^th, 2011 at 6:40pm:

It looks like the peak compression is low for most modern engines

ooops, I don't know what I was looking at but 178 psi, if the range is correct, looks OK Smiley

dave

[edited] the first file was lower at about 81 psi and the second file was around 178 psi.

Where you in the same hole with the same setup, hose, channel options?

Thanks,
dave

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« Last Edit: Sep 20^th, 2011 at 7:07am by daveyK »

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Tom Roberts Autonerdz Administrator Picogroup Offline Autonerdz Founder Posts: 8,595 Olympia Washington USA Gender:	Re: WPS interpretation Reply #10 - Sep 20^th, 2011 at 8:36am Thomas, Quote: don't have the custom probe yet. Does it take a secret handshake to get? Brian emailed our SAE probes to you in a zip file. Let us know if you cannot find that email and we will resend. Call if you need assistance with getting them installed.
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fisher Super Nerd Picogroup Offline I love YaBB 1G - SP1! Posts: 2,734 Concord California USA Gender:	Re: WPS interpretation Reply #11 - Sep 20^th, 2011 at 11:19am Sometimes mail from Autonerdz (and other well meaning folk) gets put into the junkbin by the Windows automatic junk mail checker. So, check your junk bin.
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Thomas Richardson Freshman Member Offline Posts: 9 Richland Washington USA	Re: WPS interpretation Reply #12 - Oct 6^th, 2011 at 6:36pm Somehow the email didn't make it? try obeymycar@gmail.com thanks, tr
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Tom Roberts Autonerdz Administrator Picogroup Offline Autonerdz Founder Posts: 8,595 Olympia Washington USA Gender:	Re: WPS interpretation Reply #13 - Oct 7^th, 2011 at 8:00am Thomas, Sent them to that email again just now.....
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PRESTON LSD Guide Picogroup Offline "Fix like a champion today" Posts: 4,960 Jensen Beach Florida USA Gender:	Re: WPS interpretation Reply #14 - Oct 8^th, 2011 at 7:50am Randy H. wrote on Sep 20^th, 2011 at 12:22am: I would say the exhaust valve closed too soon on this capture. the piston is still on its way up when the valve closes and the waveform shows a pressure peak. Randy, are you just looking at the picture in #6? That picture is the 2 different cylinder captures laid over on themselves.
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