Coyote Engine Life--racing hours.

[v guy]

While tracking coyote Mustangs, has hours of operation before rebuilds been established?
Ford Racing Schools probably have a standard.

When engines fail it us usually the fatigued rod bolts on the overrun that fail.

https://www.enginebuildermag.com/2017/03/preventing-connecting-rod-failures/


That’s why rod failures most often occur when the driver suddenly lets up on the throttle at the end of a run down a drag strip or when a circle track car exits the straightaway and enters a turn.

Depending totally on the largesse on the Fordpowertrain Warranty is probably a poor long term solution to rebulds.


https://www.allfordmustangs.com/threads/this-marks-the-third-failure-of-my-coyote-engine.1100175/

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[Optimum Performance]

While tracking coyote Mustangs, has hours of operation before rebuilds been established?
Ford Racing Schools probably have a standard.

When engines fail it us usually the fatigued rod bolts on the overrun that fail.

https://www.enginebuildermag.com/2017/03/preventing-connecting-rod-failures/


That’s why rod failures most often occur when the driver suddenly lets up on the throttle at the end of a run down a drag strip or when a circle track car exits the straightaway and enters a turn.

Depending totally on the largesse on the Fordpowertrain Warranty is probably a poor long term solution to rebulds.


https://www.allfordmustangs.com/threads/this-marks-the-third-failure-of-my-coyote-engine.1100175/

Oil control is what aides in Road racing Coyote failures. That other link you shared is a perfect example of spending all the money in the wrong places. People need to stop buying parts online and slapping everything together. Balance and Clearances keep being the red flags of these failures.

 

[v guy]

100 hours of racing, seems to be the general limit for short track racing. Lots of on-off cycles. As time goes on we will find out the limit.

 

[TeeLew]

I don't know what the lifing is on these engines, but 100 hours is standard for a Porsche Cup engine. Gearboxes are 50. 50 is common on endurance engines. GT3 engines just aren't that highly strung.

 

[GregO]

Interesting question when applied to powdered metal rod equipped engines.
I managed to dig up the link below, long read but it applies to this very question.
Off the cuff with PM rods, 36 hours depending on a few variables.

https://journals.sagepub.com/doi/10.1177/09544070231180996?icid=int.sj-abstract.citing-articles.48

 

[Andy13186]

I think I got like 22 hours of WOT out of my OEM engine but I revved too high too many times and my piston skirts failed and my cam cap bolts failed after my rocker arm retaining clips came off from over revving I think. This took me 60k road miles, 20k at 800 rwhp.

 

[GregO]

I think I got like 22 hours of WOT out of my OEM engine but I revved too high too many times and my piston skirts failed and my cam cap bolts failed. This took me 60k road miles, 20k at 800 rwhp.

I would guess Piston failure is second to PM rod failure with a properly tuned ECU.

 

[Andy13186]

I would guess Piston failure is second to PM rod failure with a properly tuned ECU.

Yea I hit 8500 rpm many time unintentionally and at least 8 of my rocker arm retaining clips came off, I think one went though a cam and broke my cam cap bolts, also somehow multiple piston skirts were missing chunks. Car still made the same power and no noises though surprisingly, just had cam position codes due to the bent cam after the cam cap failed.

 

[GregO]

somehow multiple piston skirts were missing chunks.

OEM Coyote pistons ?

 

[TeeLew]

Very true and the cooling is a lot bigger deal than most will ever appreciate. I preach it and *no body* wants to hear it.

Here's the deal. When a 4-stroke engine burns gasoline, about 1/3 of the energy goes out of the crankshaft, about 1/3 goes out the exhaust and about 1/3 of the energy has to be rejected out of the cooling system. When you're running a 400+ HP engine, you have to reject 400+ HP out of the cooling system.

Thermodynamics isn't just a good idea. It's the law.

 

[Andy13186]

OEM Coyote pistons ?

Yes, gen 3, this was all in my oil pan and more

broken cam cap bolts and cam cap here in my cylinder head




This was on my oil plug (rocker arm retaining clips)

 

[GregO]

Yes, gen 3,

The OEM pistons are impressive.
8500 RPM’s is really getting up there !

 

[Andy13186]

The OEM pistons are impressive.
8500 RPM’s is really getting up there !

The rods were fine , If I didnt rev above 8k I think it would still be alive, the piston skirts blew the fuk up and rocker arm retaining clips and cam cap bolts

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