I spun a bearing on new motor. I need help with how to proceed with a new short block?

[Jackson1320]

Correct. How long is the question......

the pistons can handle 1000+ for 100,000 miles. as long as the rings are gapped properly

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[Cory S]

the pistons can handle 1000+ for 100,000 miles. as long as the rings are gapped properly

Sure helps no doubt. It's a must if people want longevity in a 700+whp application absolutely.

 

[Jackson1320]

Correct. How long is the question......

i have never seen a stock coyote piston fail on its own. rings or detonation or some other force caused them to fail

 

[Jackson1320]

Sure helps no doubt. It's a must if people want longevity in a 700+whp application absolutely.

pistons don't really fail by themselves. think about every time you have seen a failure. was it just the piston on its own that failed?

 

[Jackson1320]

if someone is building a street engine at the 1800hp level then they are not worried about the piston or cylinder wear. they don't normally expect the engine to go 40,000 miles without a complete inspection. for a 1000hp street engine 4032 is the better choice if you don't want to do inspections and just keep running it. you can get 2618 pistons and add some combinations of coatings to help the pistons last longer but you are going to have a $1500-$2000 set of pistons. most people are not looking to spend that kind of money if a $700 set of 4032 pistons are more than enough. you need to be honest with your engine builder about the use and expectations

 

[engineermike]

Any idea what material the stock predator pistons are?

 

[Jackson1320]

Any idea what material the stock predator pistons are?

i'm not sure but I know they're made by Mahle

 

[Cory S]

if someone is building a street engine at the 1800hp level then they are not worried about the piston or cylinder wear. they don't normally expect the engine to go 40,000 miles without a complete inspection. for a 1000hp street engine 4032 is the better choice if you don't want to do inspections and just keep running it. you can get 2618 pistons and add some combinations of coatings to help the pistons last longer but you are going to have a $1500-$2000 set of pistons. most people are not looking to spend that kind of money if a $700 set of 4032 pistons are more than enough. you need to be honest with your engine builder about the use and expectations

My Manley Platinum's (2618) were $780.00 ($900 now). They have coated skirts and have offset wrist pins to mitigate/quiet most all cold start noise, in which they absolutely do. They are at .0045". The older designs like CP/Ross/Diamond with centered wrist pins and builders putting them at .0055-.007" are the ones that were rackety as all hell back in the day.

 

[Jackson1320]

My Manley Platinum's (2618) were $780.00 ($900 now). They have coated skirts and have offset wrist pins to mitigate/quiet most all cold start noise, in which they absolutely do. They are at .0045". The older designs like CP/Ross/Diamond with centered wrist pins and builders putting them at .0055-.007" are the ones that were rackety as all hell back in the day.

coated pistons doesn't say much. coated with what?

 

[Jackson1320]

My Manley Platinum's (2618) were $780.00 ($900 now). They have coated skirts and have offset wrist pins to mitigate/quiet most all cold start noise, in which they absolutely do. They are at .0045". The older designs like CP/Ross/Diamond with centered wrist pins and builders putting them at .0055-.007" are the ones that were rackety as all hell back in the day.

you might be fine with the noise so it don't bother you. but they still make noise especially next to stock pistons

 

[Cory S]

you might be fine with the noise so it don't bother you. but they still make noise especially next to stock pistons

Sure, but as far as I can tell, I haven't heard anyone complain or be worried about their Coyote builds and 2618 pistons that many thousands include either. Or..... anyone stating their engines wore out too soon in the last 7 years because of it. I believe Hellcats and a few other OEM builds that are 700+hp, are using 2618 forgings too, and nobody seems to complain.

 

[Cory S]

coated pistons doesn't say much. coated with what?

Molybdenum.

 

[GregO]

There’s no better compromise than OEM cast hypereutectic pistons. Add coated aluminum cylinders to the mix and the expansion rate between the two components is matched to near perfection.

@engineermike, I can’t honestly answer your question but I don’t see Ford using anything but cast hypereutectic pistons. Just a guess on my part.

Edit:
5.2 GT350 & GT500, OEM installed forged pistons !

 

[engineermike]

Predator pistons:

 

[Jackson1320]

Predator pistons:

those are definitely Mahle they could be 2618 they could be 4032 but they're coated in grafal

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