What Engine Parts Break First under High HP

[DougS550]

I am gathering information to understand at what point, Boosted HP levels do certain internal parts ie; Rods, oil pump, valves, valve springs, bearings, pistons Etc start to break. I am going to boost my stock 19 GT PP1 to around 800-900rwhp. What are some of the first engine parts which start to fail at that level. And at what point will the Rods, pistons, bearings, valves, crank Etc start to fail.
Thank you.

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[WildHorse]

And at what point will the Rods, pistons, bearings, valves, crank Etc start to fail.

Stock ? Over a 1100 wheel.
But most of the time dumbassery breaks more parts & any horsepower level.

 

[DougS550]

Stock ? Over a 1100 wheel.
But most of the time dumbassery breaks more parts & any horsepower level.

Take the less knowledgeable drivers out of the equation, stock parts fail at a given level of HP or RPMs due to metal fatigue, poor factory casting, machining what ever it might be. Just wanted to get an idea as to how fast I buy a used engine to build. Thanks

 

[WildHorse]

Thanks

Midnight performance made 1300 wheel on a stock, sealed, gen 2 coyote engine. Lasted a while before they turned up the turbos and it blew.

Lots of stock gen2/3 coyotes making a 1000 wheel and living very happily.

At 8-900 wheel you won't have any problems as long as you have octane.

But since you asked, ringlands tend to go first.

 

[DougS550]

Midnight performance made 1300 wheel on a stock, sealed, gen 2 coyote engine. Lasted a while before they turned up the turbos and it blew.

Lots of stock gen2/3 coyotes making a 1000 wheel and living very happily.

At 8-900 wheel you won't have any problems as long as you have octane.

But since you asked, ringlands tend to go first.

Thanks. That's one reason I didn't buy a SRT, dodge builders said the piston top ring land breaks around 600rwhp. But all of these dodge performance shops praised how easily the Gen3 Coyote can handle extreme high HP levels and survive, within reason. I'll be on E85 system top end. I know how important fuel is and how lean or irratic fuel supply can trash and engine.

 

[Cory S]

Pistons are the weakest link. Ringlands break at higher power on gasoline. They go much further on Ethanol.

Rods are stout AF. Very very few rod failures under 1200whp.

 

[ice445]

Pistons are the weakest link. Ringlands break at higher power on gasoline. They go much further on Ethanol.

Rods are stout AF. Very very few rod failures under 1200whp.

Agreed, ringlands are the most common failure by far, especially with pump gas users pushing over 700. E85 users rarely have issues.

Catalytic converters also love to give up with supercharger setups.

 

[HKusp]

Between Cory and I, we have killed 3 engines due to ringland failure. If you are shooting for between 800-900whp, do yourself a favor, even on ethanol, pull the pistons and have the rings gapped for boost. It is good insurance. That stock .009 is too tight for boost and heat.

 

[DougS550]

Pistons are the weakest link. Ringlands break at higher power on gasoline. They go much further on Ethanol.

Rods are stout AF. Very very few rod failures under 1200whp.

Well, that is impressive for a stock oem engine to be able to survive under such

Pistons are the weakest link. Ringlands break at higher power on gasoline. They go much further on Ethanol.

Rods are stout AF. Very very few rod failures under 1200whp.

Very impressive for a stock, OEM engine.
BTW, are the timing chains, guides holding up just as good?

 

[DougS550]

Between Cory and I, we have killed 3 engines due to ringland failure. If you are shooting for between 800-900whp, do yourself a favor, even on ethanol, pull the pistons and have the rings gapped for boost. It is good insurance. That stock .009 is too tight for boost and heat.

Can you remove the piston/rod from under neith by removing oil pan, then crank etc? Without pulling the engine?

 

[ice445]

Can you pull the pistons from under either by removing oil pan, crank? Without pulling the engine?

Nope. It might be technically possible if you drop the subframe entirely, but at that point you're better off just removing the engine.

 

[HKusp]

You are going to do it one way or the other. Either you do it before you break a ring land and damage other things, or you do it afterwards and have to build a short block. If you are on ethanol, you'll put it off for a good while, but you're on borrowed time at that horsepower level.

 

[Cory S]

Well, that is impressive for a stock oem engine to be able to survive under such

Very impressive for a stock, OEM engine.
BTW, are the timing chains, guides holding up just as good?

Well. I don’t have an answer that involves how robust the timing assembly is, but all my timing components are 100% original from 2016 (26K miles) and have been swapped to 2 newer short blocks……..

 

[DougS550]

Well. I don’t have an answer that involves how robust the timing assembly is, but all my timing components are 100% original from 2016 (26K miles) and have been swapped to 2 newer short blocks……..

Thanks. What was the cause of you two engine failures which you needed to buy short blocks for?

 

[Cory S]

Thanks. What was the cause of you two engine failures which you needed to buy short blocks for?

Ringland failure on gasoline and stock ring gaps.

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