Spun rod bearing..

[pwnall1337]

I spun a bearing as well. Procharged with oil pump gears. Stock balancer. Not even 3k miles since being boosted. Tore everything apart. Motor was perfect except the bearing and crank. No idea why the motor killed itself.

what oil were you running?

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[GT Pony]

Voodoo has a bigger oil pump, even though it uses the same gear. It looks like it will flow more oil. Coyote at 7700 RPM may not flow any more oil than at 6700 RPM.

Depends on what the oil pump's pressure relief is set to, and what the oil viscosity is at the time. The thicker the oil, and the lower the pump's pressure relief is set to, the less oil volume that makes it to the engine.

 

[mustang1]

Depends on what the oil pump's pressure relief is set to, and what the oil viscosity is at the time. The thicker the oil, and the lower the pump's pressure relief is set to, the less oil volume that makes it to the engine.

My car just has the idiot gauge for oil pressure that says "Normal" so I cannot tell what the oil pressure is doing. Does it change according to RPM ? It seems like it would increase with RPM until going into bypass at some point, peaking at a certain number of GPM.

 

[sigintel]

Why are you hitting the rev limiter so Often?

6R80 hoonage. Empty roads. Cloverleafdrifto.

what is the limiter set to ?
There has been a lot of discussion about OPG but not about the oil pump itself. What are the specs on the Coyote oil pump? Ford improved the oil pump for the Voodoo. Is the Coyote oil pump not good enough for 8200 RPM ? How about 7700 RPM ? Does oil pressure change from 6700 to 7700 ?

Stock march 2016 Whipple tune-7500? I think.

 

[GT Pony]

My car just has the idiot gauge for oil pressure that says "Normal" so I cannot tell what the oil pressure is doing. Does it change according to RPM ? It seems like it would increase with RPM until going into bypass at some point, peaking at a certain number of GPM.

That's correct ... the oil pressure would peak out at whatever the pressure relief is set to.

If the oil is thicker, then the pressure relief is obtained with less oil volume being sent to the engine. If the oil is really thin, the pressure relief point may never be achieved, and that would give max oil flow through the engine.

 

[AutoX_GT]

RPM may put more stress on it, but mine failed under 7k in 3rd gear.

Good to know, OPG's soon to be ordered! Just sucks I have to remove the Paxton just to get to the timing cover.. Oh well it's something to do while it's stored for winter..

 

[sigintel]

Op running Boss 302 bearing clearances or stock 15-17 coyote?

For street n strip runs w CHT 190-230 at the line, I stay with 5w20 QSUD with our tight clearances. Newer chemistry (Mobil 1 is now following suit w there 0w40 and maybe close to the QSUD 275 and 235F performance data)

For 30 min HPDE 240F CHT, maybe very good 5w30,0w40,5w50 but no WOT with 5w20 to 5w50 below 190F CHT. I run QSUD 5w30 to 243 CHT and change it that weekend. Based on 275F QSUD 5w30 oil test data and wanting to be close to the bearing design viscosity.

There is very different performance between oils even comparing just 5w20.

Sounds like cold starved bearing or det pushed crank thru oil shear layer into journal. Check wrist pin and piston for wallered bearing?
Any logs?
Recent change in gas?

Could be absolutely nothing Op did and just OEM mfg differences.

 

[F1scamp]

Op running Boss 302 bearing clearances or stock 15-17 coyote?

For street n strip runs w CHT 190-230 at the line, I stay with 5w20 QSUD with our tight clearances. Newer chemistry (Mobil 1 is now following suit w there 0w40 and maybe close to the QSUD 275 and 235F performance data)

For 30 min HPDE 240F CHT, maybe very good 5w30,0w40,5w50 but no WOT with 5w20 to 5w50 below 190F CHT. I run QSUD 5w30 to 243 CHT and change it that weekend. Based on 275F QSUD 5w30 oil test data and wanting to be close to the bearing design viscosity.

There is very different performance between oils even comparing just 5w20.

Sounds like cold starved bearing or det pushed crank thru oil shear layer into journal. Check wrist pin and piston for wallered bearing?
Any logs?
Recent change in gas?

Could be absolutely nothing Op did and just OEM mfg differences.

Havent pulled the motor down all the way yet. Spark plugs showed no detonation signs. No logs. Stock motor w/ whipple tune. Was the first time running Sunoco race fuel, but I don't see how it would detonate since it is whipples 91 octane rated tune. Motor certainly wasn't stone cold, but did not look at cht, coolant temp gauge was around normal.

Knowing how tight the bearing clearances are now, I agree that the motor should be fully up to temp, and there is no way I will run any heavier oil than 5w/30.

 

[mustang1]

... Did an oil change Friday, put a touch extra oil in it since I spin it to 7700rpm shifts, 5w/30 max life.
Track was pretty bad, had to turn first gear down 15%, second 10% (stock tires), fourth pass it went 11.22 @ 133.7mph. Fifth pass everything felt fine, no noises, clicked it into neutral through the traps and that's all she wrote. Motor locked up. ...

Particulars of the car 16 gt, manual, stage2 whipple, 3.75 pulley, boundary opg, t.s.s. crank gear, ati balancer. 10k on motor, 5k on whipple and gears, 24 passes.

how hot does the engine get by the fifth pass ?

 

[F1scamp]

It's fifth pass of the day was probably around 6+hrs from the first one.

When I get around to digging in deeper maybe I will find a reason for the failure. I plan on checking everything I can think of. Just picked up a book on the 5.0 coyotes, was hoping it was going to get a little deeper into the specs and such, but it was good reading non the less.

http://www.ebay.com/itm/Ford-Coyote...299472?hash=item5b303c9090:g:DEAAAOSwCEdYUDne

 

[sigintel]

How empty was tank for switch to Sunoco?
How many miles of driving on Sunoco before pulls?

If motor locked when you let off gas and pushed in clutch then I assume the bearing was actually already toast under load and motor drove thru the resistance.
Pics of bearing?

Foreign object in that oil port for that bearing?

Any play on that wrist pin/piston as though hammered on?
Top of that piston and the plug?

If you make tons of pulls on the highway on a regular basis no problem, the cause is likely from whatever was different versus all your highway pulls:
Colder engine
Different fuel
or combination of the two...

Could be wrong; however,
If the ECU still has learning capability like OEM (assume as much since Whipple partners with Ford OEM tuner), then the ECU can only 'learn' the fuel capability by detecting knock and backing off. The firmware strategy might work best by running at least part if not a whole tank on highway and some moderate accels before running at the strip.

If the ECU only had a mile or two with new fuel and always with widely varying engine temperature, then its possible it may have thought the fuel had more capability then available.

Again, could just be OEM mfg variance and absolutely nothing you did.

 

[dubster99]

Didn't someone here also lose their opg when the motor wasn't fully warm?

 

[mustang1]

It's fifth pass of the day was probably around 6+hrs from the first one.

These run about one per hour ? What was the outdoor temps ?

 

[Roh92cp]

Didn't someone here also lose their opg when the motor wasn't fully warm?

That was me:headbonk:I had idled for a couple minutes then drove 4-5 miles at that time the oil temp just reached the bottom of the normal range. I then ripped it with my brother 1-3 I believe and at the top of third got the low oil warning light and looked and had 0 oil pressure and was still at 6k. I've installed a independent oil temp sensor and gauge on my replacement engine and notice the stock dummy gauge is way ahead of actual temps from my gauge. The stock dash gauge is extrapilated or estimated from other temp sensors like cyl and ECT, there is no sensor on the motor for oil temp on ours. I would drive at least 15 miles before hammering on it now. My new gauge shows about 170 f after 15 mils or so give or take.

 

[Roh92cp]

Here is the link to my oil temp gauge findings. I've also since relocated the sensor to a better location.http://www.mustang6g.com/forums/showthread.php?t=68394

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