Vibration all the time
- Gazmendhajra
- Topic Author
- Offline
- Senior Member
- Posts: 57
- Thank you received: 8
Please Log in or Create an account to join the conversation.
- Gazmendhajra
- Topic Author
- Offline
- Senior Member
- Posts: 57
- Thank you received: 8
Please Log in or Create an account to join the conversation.
Your Blue/Green, vertical cursors are set on 360°. They should be set on 720°, as there are 2 revolutions of the crankshaft, in 4-stroke cycle. Then, use your white cursors to, accurately, measure valve events in degrees of rotation.
What kind of pressure transducer are you using? And, how many mv/unit (psi, or kPa)does it put out?
Are both of the captures taken at Idle?
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right.
Please Log in or Create an account to join the conversation.
- Gazmendhajra
- Topic Author
- Offline
- Senior Member
- Posts: 57
- Thank you received: 8
Please Log in or Create an account to join the conversation.
- Gazmendhajra
- Topic Author
- Offline
- Senior Member
- Posts: 57
- Thank you received: 8
Please Log in or Create an account to join the conversation.
- Gazmendhajra
- Topic Author
- Offline
- Senior Member
- Posts: 57
- Thank you received: 8
Please Log in or Create an account to join the conversation.
In the meantime, I offer a couple tips.
The PV-350 is a very good tool. It is best used set on kPa, though. The PV-350 puts out 1mv per unit.
In the psi mode, 1 mv = 1 psi = 6.89476 kPa.
In the kPa mode 1 mv = 1 kPa = 0.145038 psi.
In short, you get 6.89 times the resolution with kPa. To convert to psi, divide the kPa mv reading by 6.89 = psi.
I can't change it 720 its the scope
Have you double-clicked on the [ 360° ]?
It should turn high-lighted blue. You can enter any number you want. You can change the 0° cursor, too. The white cursor will, then, scale to the two blue/green cursors.
An exhaust valve opening EARLY will cause the expansion pocket to be less than (not as deep as) the intake stroke. An exhaust valve that opens LATE will shift the rising edge of the expansion pocket to the right. This event, usually, happens around 45° ± BBDC. I don't see this happening until the 180° (90° on your cursors), when the piston start its upward ascent. I'd like to see a relative compression w/ sync.
I need more pressure transducer lessons
So, do I.
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right.
Please Log in or Create an account to join the conversation.
- Gazmendhajra
- Topic Author
- Offline
- Senior Member
- Posts: 57
- Thank you received: 8
Please Log in or Create an account to join the conversation.
- Gazmendhajra
- Topic Author
- Offline
- Senior Member
- Posts: 57
- Thank you received: 8
Please Log in or Create an account to join the conversation.
- Gazmendhajra
- Topic Author
- Offline
- Senior Member
- Posts: 57
- Thank you received: 8
Please Log in or Create an account to join the conversation.
Do all cylinders look the same, when in-cylinder?
thanks i double clicked it changed
Now, click the "Rulers" option and change it to 4 partitions, one for each of the four strokes. This divides the space, between the Blue/Green 720° cursors, into Four 180° sections.
Then use the White Cursors, to take your measurements, by dragging the little white square, on the bottom left of the screen. You can drag, and obtain, TWO white cursors.
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right.
Please Log in or Create an account to join the conversation.
- Gazmendhajra
- Topic Author
- Offline
- Senior Member
- Posts: 57
- Thank you received: 8
Please Log in or Create an account to join the conversation.
- Gazmendhajra
- Topic Author
- Offline
- Senior Member
- Posts: 57
- Thank you received: 8
Please Log in or Create an account to join the conversation.
- Gazmendhajra
- Topic Author
- Offline
- Senior Member
- Posts: 57
- Thank you received: 8
Please Log in or Create an account to join the conversation.
- Gazmendhajra
- Topic Author
- Offline
- Senior Member
- Posts: 57
- Thank you received: 8
Please Log in or Create an account to join the conversation.
- Gazmendhajra
- Topic Author
- Offline
- Senior Member
- Posts: 57
- Thank you received: 8
Please Log in or Create an account to join the conversation.
♦ Late EVO.
♦ Intake stroke not reaching full vacuum, until 90° After TDC.
I think the next step is to look up the Camshaft Specs, for the four valve events. Use the cursors to determine at what degree of Crank Rotation the valves are ACTUALLY opening, and closing. Then, compare to specs.
I suspect a retarded camshaft, or worn cam lobes.
What year, make, model, and engine is this?
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right.
Please Log in or Create an account to join the conversation.
- Gazmendhajra
- Topic Author
- Offline
- Senior Member
- Posts: 57
- Thank you received: 8
Please Log in or Create an account to join the conversation.
- Gazmendhajra
- Topic Author
- Offline
- Senior Member
- Posts: 57
- Thank you received: 8
Please Log in or Create an account to join the conversation.
- Gazmendhajra
- Topic Author
- Offline
- Senior Member
- Posts: 57
- Thank you received: 8
Please Log in or Create an account to join the conversation.