Bad tune, how bad is it?

[DSMReviver]

I was looking up some videos and this video caught my attention. This video shows the result of a rod knock. I understand that there is alot of reasons why this could happened. One being poor clearances, poor maintenance, and bad tune.

As i watched this video, this car has a rod knock like no other. Metal shavings everywhere in the oil pan and remissness of gasoline are present. (1) My question is (experience ecu tuners out there), how bad is the tune could of been in order for the oil to lose its viscosity and destroyed the bearings?

This reminds me of when i first started my car for the first time, after i have the motor rebuild and it was running super rich with 660's injectors and the engine oil is filled with the smell of gasoline and i later note to changed it. Ever since then it has about 4 miles on the new motor and this video make me worry :/ . I posted a video of my engine making a wired tick or some sort a few months ago and everybody was telling me it could be the lifters(Idk). (2)The second video is my car at idle, and i also need to understand if this is a precursor to what is going to happened in the first video? Any info is greatly appreciated.

1st video...
YouTube - 4G63 Rod Knock / Talon Eclipse DSM Turbo

2nd video(my car)...
YouTube - What do you hear, is it normal?

 

[yukiz]

rev the car little bit...... if the sound gone, most likely you have bad lifter....... if the knocking sound increasing as you reving up...... you might wanna start takinh apart the engine.....

 

[DSMReviver]

rev the car little bit...... if the sound gone, most likely you have bad lifter....... if the knocking sound increasing as you reving up...... you might wanna start takinh apart the engine.....

yeah, gonna rev it tomorrow. But, lifter shouldn't be the problem because these are the itm 3g revised lifters. the car is also sitting for awhile(summer) without start but its been started up ever other week this winter...but i notice its been running rich on wally 255 at first start and i hope it didnt wash out the bearings. idk.

 

[Imback]

Well running a fresh engine rebuild rich is a big no no. As you will wash down the cylinders. Were the lifters bleed?

 

[colbyc]

That's how my car sounded when I spun a rod bearing last summer

 

[delta448]

yeah, gonna rev it tomorrow. But, lifter shouldn't be the problem because these are the itm 3g revised lifters. the car is also sitting for awhile(summer) without start but its been started up ever other week this winter...but i notice its been running rich on wally 255 at first start and i hope it didnt wash out the bearings. idk.

Your video sounds like lifter tick to me. It's probably just a single lifter causing that noise, let the car idle until you reach operating temp and see if it goes away. If the car sits very long without running, the lifters may slowly collapse.

What rpm does your engine idle at?

Notice that the ticking in your video is at about half the speed of the knocking in the other video? -That's because yours is coming from the valvetrain, which turns at 1/2 the speed of the crankshaft.

Now, with that said, DO NOT run a newly built engine at overly rich AFRs or you WILL have big problems. Washing the cylinders down kills ring seal and lowers compression, which results in much more blow-by. It also thins out the oil with all the extra gasoline and combustion by-products now getting into the crankcase. That causes bearing failures, and potentially a huge under hood fireball from any dipstick pukage.

 

[DSMReviver]

Your video sounds like lifter tick to me. It's probably just a single lifter causing that noise, let the car idle until you reach operating temp and see if it goes away. If the car sits very long without running, the lifters may slowly collapse.

What rpm does your engine idle at?

Notice that the ticking in your video is at about half the speed of the knocking in the other video? -That's because yours is coming from the valvetrain, which turns at 1/2 the speed of the crankshaft.

Now, with that said, DO NOT run a newly built engine at overly rich AFRs or you WILL have big problems. Washing the cylinders down kills ring seal and lowers compression, which results in much more blow-by. It also thins out the oil with all the extra gasoline and combustion by-products now getting into the crankcase. That causes bearing failures, and potentially a huge under hood fireball from any dipstick pukage.

The engine in that video is probably idle around 850+ or -. I just hope i didn't screw anything up on the new motor. How bad is the afr be and how long till it eats up the bearing? The car probably run a total time of 7 hours, in 7 month, with 3 oil changed in that time frame. with wally 255 on stock 450's what is the afr or fuel pressure need to be set at?

 

[delta448]

I think you're safe. Even with some mild FPR overrun (assuming a stock FPR), you probably won't max out the fuel trims and idle too rich. Your fuel pressure should be set to 43.5psi with the vac line disconnected from the FPR.

 

[DSMReviver]

Yeah, im on stock afpr. The first time we started the car for the first time, the car was on fic 660cc injectors with wally 255. That first start the car was running pig rich(ran it for 4hr max). you could even smell gasoline out the tail pipe. I don't know if this could possibility did damage on the motor. i don't know if i am just over worrying or what but spend 3k plus to put that motor in the car make me worried(i'm sorry).