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| 300WHP Supernatural 3.XX Coming Soon! (Page 51/54) |
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ericjon262
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OCT 13, 12:50 AM
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if someone is having problems with a check valve causing a restriction, it sounds to me like it was improperly sized. FWIW, many oil filters integrate a check valve in their design. and by nature of the oil filter having some restriction, placing a sensor pre oil filter may be adequate in lieu of a check valve, assuming the accumulator is plumbed post filter.
To be clear, a check valve is by no means required to prevent the accumulator from dumping into the sump, the nature of a positive displacement pump like an oil pump will prevent any massive backflow from occurring unless the pump driveshaft fails, or all the inside parts of the oil pump decide to become outside parts.
I'm also not aware of any oil pump for an engine being velocity based (non positive displacement), people who say a check valve is an absolute requirement, would be wrong unless the engine they are running has a velocity based oil pump
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"I am not what you so glibly call to be a civilized man. I have broken with society for reasons which I alone am able to appreciate. I am therefore not subject to it's stupid laws, and I ask you to never allude to them in my presence again."
I invited Lou Dias to trash me in my own thread, he refused. sorry. if he trashes your thread going after me. I tried.
No pushrod 60V6 Fiero has been faster according to the 1/4 mile list. [This message has been edited by ericjon262 (edited 10-13-2022).]
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Patrick
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OCT 13, 01:49 AM
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| quote | Originally posted by Patrick:
I take it then that the extra 1-1/2 quarts of oil that are "injected" into the engine's oil system (when the accumulator temporarily empties) at startup isn't an issue at all?
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| quote | Originally posted by ericjon262:
I'm not sure I would add the entire working volume of the accumulator to the oil pan...
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I agree with you. I was rather surprised that in the demo video (starting from This point), that they clearly show the entire contents of the accumulator being emptied into the engine prior to start up. The guy even says... "You're dumping all this in there." Seems to me that when the engine is then first started, that the crankshaft would be pounding away at the resulting high oil level in the pan.
| quote | Originally posted by La fiera:
No. As soon as the engine starts after pressurization by the accumulator instant oil pressure is experienced because the oil doesn't have to spend time traveling from the oil pump, through the engine filling every crevice.
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As explained above, it wasn't lack of oil pressure that I was concerned about!  [This message has been edited by Patrick (edited 10-13-2022).]
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ericjon262
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OCT 13, 02:07 PM
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| quote | Originally posted by Patrick:
As explained above, it wasn't lack of oil pressure that I was concerned about!
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gotcha, Personally, I don't think it would be a problem, especially short duration like on a startup, if there was always too much oil in the pan, yeah, it could be a problem. honestly, I would argue that for 99.999% of engines any of us are using, pre-lubing is absolutely unnecessary. I would be more focused on oil control while running than pre-lube characteristics. ------------------
"I am not what you so glibly call to be a civilized man. I have broken with society for reasons which I alone am able to appreciate. I am therefore not subject to it's stupid laws, and I ask you to never allude to them in my presence again."
I invited Lou Dias to trash me in my own thread, he refused. sorry. if he trashes your thread going after me. I tried.
No pushrod 60V6 Fiero has been faster according to the 1/4 mile list.
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La fiera
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OCT 23, 09:17 PM
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La fiera
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APR 02, 05:21 PM
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I don't know where to start.  Last Wednesday I was doing the final tuning of the car to finalize it in the Dyno. The breaking up passed 5k was resolved and the engine cleanly and crispy hit the limiter 8300rpm effortlessly. I'm all done but decided to check the ignition trigger offset to verify it with a timing light. Made a small change and (this is where I messed up) hit the "burn" button With the engine running!!. There was a loud thunk and it felt like someone hit the car. The starter could barely turn the engine. I took all the spark plugs out and the engine spun freely. Compression test was good all through all cylinders. Put the plugs back in, reflashed a back up tune and fire the engine. It fired fine but it seemed uneven and making a squeaky sound at crank speed. So definitely something is wrong.
I kept playing the scenario in my head and asking myself, "How in the world did you made that mistake, you've done this hundreds of times?? Why, didn't you shut the engine like you've always done" Up until now I can't answer myself. But this is it for this engine for now. I'll see what's wrong when I take it apart. The heads on it will go the 9000RPM short block. I'll fix it and refresh it and set it aside for the future. What really pisses me off is that I couldn't go to the dyno and really see its potential and I had 3 different track days booked and now I can't go. There is an old Spanish proverb that says "No hay mal que por bien no venga" Basically means when bad things happen, good things are coming.
In another note, the 3.7LR is ready to be assembled. I installed the crank, prepped the cylinders with dry lubricant, assembled the rod, piston and rings. The drysump pan is being made along with the bracket that will hold the pump on the pan.
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Trinten
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APR 02, 05:50 PM
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Oh man! I'm sorry to hear that. I hope it turns out to be an easy/straight forward fix.
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Will
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APR 02, 06:11 PM
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Dam, dude, that sucks. I'm sorry to hear you have to deal with that.
Gotta watch that complacency... I went to Navy flight school right out of college. One of the instructors would say "With the number of flight hours I have right now, I'm statistically most likely to get myself and someone else killed. Let's go flying!"
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La fiera
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APR 02, 09:55 PM
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| quote | Originally posted by Will:
Dam, dude, that sucks. I'm sorry to hear you have to deal with that.
Gotta watch that complacency... I went to Navy flight school right out of college. One of the instructors would say "With the number of flight hours I have right now, I'm statistically most likely to get myself and someone else killed. Let's go flying!" |
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Yes, I think I got too comfortable.
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Frenchrafe
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APR 03, 05:50 AM
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Oh that's a shame...
I hope it's nothing too serious?
Sounds like the engine management went mad? Possibly firing all 4 cylinders at once while dumping full squirt with the injectors?
Backfire shock load? Partial hydro-lock?[This message has been edited by Frenchrafe (edited 04-03-2023).]
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pmbrunelle
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APR 03, 08:18 AM
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Was the engine running at full load when you clicked "Burn"?
Sometimes there is a hiccup, and it seems like there may be a jump in timing.
Normally I don't shut off the engine completely; I just click "Burn" when the engine is at idle, where damage is less likely.
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