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Old 12-07-2022, 08:59 PM   #21
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You got me wanting to try and do a relative compression test with an ammeter now. Would need a way to indicate cylinder though. Might be a cool kit to build.

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Old 12-07-2022, 10:46 PM   #22
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You got me wanting to try and do a relative compression test with an ammeter now. Would need a way to indicate cylinder though. Might be a cool kit to build.

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That's definitely over my head, I'm wishing I would of measured blowby with my digital manometer before hand so I had better numbers to go off of for future referance. Oh well
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Old 12-09-2022, 05:17 AM   #23
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How to perform a compression test with a scope (Verus-Vantage) - YouTube
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Old 12-09-2022, 09:32 AM   #24
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That's pretty sweet, definitely save the diesel guys some time.
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Old 12-09-2022, 10:11 AM   #25
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Well isn't that slicker than owl shit.
 
Old 12-09-2022, 10:50 AM   #26
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That's is sweet for sure. Generally I go by sound first, then I do a normal compression test if something sounds off. If it's close the ear does not always pick it up though.
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Old 12-09-2022, 12:26 PM   #27
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😁😁😁 My first time was in a Detroit engine. The trick is plotting crank angle on a non electronic engine. Might not be too bad with a photo-optic pickup, get each cylinder to tdc and place a reflector on the damper for each cylinder blah blah.
Might not even need that.

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Old 12-09-2022, 01:36 PM   #28
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😁😁😁 My first time was in a Detroit engine. The trick is plotting crank angle on a non electronic engine. Might not be too bad with a photo-optic pickup, get each cylinder to tdc and place a reflector on the damper for each cylinder blah blah.
Might not even need that.

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I was kinda thinking something along the lines of a hall effect or magnetic sensor to indicate #1 TDC and monitor it on another scope channel overlaid on the amp probe trace. Could probably run this off of the factory cam sensor. Right?
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Old 12-09-2022, 02:12 PM   #29
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Tried to edit previous post to more thoroughly explain my thoughts, but passed the 30 minute peasant status edit window...

I was kinda thinking something along the lines of a hall effect or magnetic sensor to indicate #1 TDC and monitor it on another scope channel overlaid on the amp probe trace. Could probably run this off of the factory cam sensor. This should narrow a problem down to being within one or both of the companion cylinders?

With a 12 valve I guess youd need to attach a high spot to the OD of the crank damper with the leading edge set at #1 TDC in relation to the sensor? In that scenario a sensor mounted to something like a indicator mag base and stick that on the oil pan oughta work? Just need to disregard the #1 exhaust stroke reading. How far off am I???? lol
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Old 12-09-2022, 02:21 PM   #30
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Tried to edit previous post to more thoroughly explain my thoughts, but passed the 30 minute peasant status edit window...



I was kinda thinking something along the lines of a hall effect or magnetic sensor to indicate #1 TDC and monitor it on another scope channel overlaid on the amp probe trace. Could probably run this off of the factory cam sensor. This should narrow a problem down to being within one or both of the companion cylinders?



With a 12 valve I guess youd need to attach a high spot to the OD of the crank damper with the leading edge set at #1 TDC in relation to the sensor? In that scenario a sensor mounted to something like a indicator mag base and stick that on the oil pan oughta work? Just need to disregard the #1 exhaust stroke reading. How far off am I???? lol
I think you're on it, I was just trying to home brew instead of using a scan tool, although mapping on a tool would be better.

A photo-tach would work.

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Old 12-09-2022, 04:04 PM   #31
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I think you're on it, I was just trying to home brew instead of using a scan tool, although mapping on a tool would be better.

A photo-tach would work.

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Gotcha.
How would one go about analyzing the starter amp draw in a home brew sorta scenario?
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Old 12-09-2022, 05:42 PM   #32
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Gotcha.

How would one go about analyzing the starter amp draw in a home brew sorta scenario?
It would still have to have an amp clamp with an output I would think.
I was just meaning something Arduino flavored and run the outputs on the monitor or a screen HAT on the Arduino.

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Old 12-12-2022, 07:40 AM   #33
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My ears tell me when there's a dead hole.
Even if it's between someone else's ears.

Mark.
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Old 12-12-2022, 08:57 PM   #34
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My ears tell me when there's a dead hole.
Even if it's between someone else's ears.

Mark.
How's do you tell??

Constipation of the brain and diarrhea out the mouth?
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Old 12-13-2022, 05:51 AM   #35
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Drop the pan, pull the head, remove rod and piston, wrap crank in wraps, dingle ball the hole, new rings, rotate engine a few times to check work, assemble remaining parts. Drive it.
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Old 12-13-2022, 07:53 AM   #36
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dingle ball the hole,


*** removing myself from inappropriate comments***
 
Old 12-13-2022, 08:55 AM   #37
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Drop the pan, pull the head, remove rod and piston, wrap crank in wraps, dingle ball the hole, new rings, rotate engine a few times to check work, assemble remaining parts. Drive it.
Same thing I said.

Then go another 200k miles..
 
Old 12-13-2022, 03:54 PM   #38
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Dingle ballz, dingle ballz, dingle all the waaaaay

I said what I said...... (Via text)



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Last edited by biggy238; 12-13-2022 at 03:55 PM.
 
Old 12-13-2022, 05:54 PM   #39
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Got the motor pulled and on the stand this weekend. Out of curiosity what makes you guys choose the dingle balls over the 3 stone hone?
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Old 12-13-2022, 05:54 PM   #40
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Dingle ballz, dingle ballz, dingle all the waaaaay

I said what I said...... (Via text)



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I can appreciate the Christmas enthusiasm
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