Boss 302 crank and piston swap into coyote
08-09-2012, 08:31 PM
#1
2nd Gear Member
Thread Starter
Join Date: Aug 2010
Location: Pawleys Island , South Carolina
Posts: 172
Boss 302 crank and piston swap into coyote
So from what Im reading , It is a feasable idea to swap in the rods, pistons and crank from a boss302 into a coyote. I have noticed the #8 cylinder missfire reported to the Coyotes , but havent noticed any reports on Boss 302s. I have read that they cap off the piston squirters on the Boss 302s , is that something I need to do on my coyote block if I go this route? Im building a Coyote with 3800 miles on it that spun a bearing, I have already ordered a new coyote crank , but if I can increase durability by upgrading to the Boss goodies Im thinking I need to go this route. Any knowledge on this course ? Input appreciated.
08-10-2012, 11:29 AM
#3
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Join Date: Apr 2011
Location: Texas
Posts: 684
The Boss internals would be an upgrade but aren't truly 'forged' like aftermarket forged rods and pistons you may buy are. One of the main reasons #8 pops is because of an aggressive tune and this problem I believe was fixed after 2011 and the only reason it seems like so many are going is because a lot of people post about it, if everyone's the didn't pop posted you wouldn't be worried about it.
08-10-2012, 03:25 PM
#4
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Thread Starter
Join Date: Aug 2010
Location: Pawleys Island , South Carolina
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The Boss internals would be an upgrade but aren't truly 'forged' like aftermarket forged rods and pistons you may buy are. One of the main reasons #8 pops is because of an aggressive tune and this problem I believe was fixed after 2011 and the only reason it seems like so many are going is because a lot of people post about it, if everyone's the didn't pop posted you wouldn't be worried about it.
08-13-2012, 03:29 PM
#7
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Join Date: Dec 2011
Location: California
Posts: 151
The starting material condition dictates the strength that a particular piston, rod, or crankshaft can have.
Pistons can be cast, centrifugally cast, cast from a hypereutectic alloy, or cast and hot isostatic pressed, finally forged from wrought material. The order listed is in increasing ultimate tensile strength. Also cast pistons yield very slightly before they fracture, compared to wrought pistons, which can yield well before they catastropically fail.
Connecting rods can be cast, forged from powder metal, forged from wrought metal, and forged into H and I beam configurations. Again, forging from powder metal preforms is less expensive than forging from wrought steel or aluminum or titanium, and also has less ultimate or yield strength. Coyote and V6 connecting rods are forged from powder metal, and as such have lower mechanical properties than wrought steel which is forged into a connecting rod. It is best to purchase forged components made from wrought product, especially if you will be exerting near yield strength forces on these components (7800 RPM and above, typically).
Pistons can be cast, centrifugally cast, cast from a hypereutectic alloy, or cast and hot isostatic pressed, finally forged from wrought material. The order listed is in increasing ultimate tensile strength. Also cast pistons yield very slightly before they fracture, compared to wrought pistons, which can yield well before they catastropically fail.
Connecting rods can be cast, forged from powder metal, forged from wrought metal, and forged into H and I beam configurations. Again, forging from powder metal preforms is less expensive than forging from wrought steel or aluminum or titanium, and also has less ultimate or yield strength. Coyote and V6 connecting rods are forged from powder metal, and as such have lower mechanical properties than wrought steel which is forged into a connecting rod. It is best to purchase forged components made from wrought product, especially if you will be exerting near yield strength forces on these components (7800 RPM and above, typically).
08-13-2012, 05:37 PM
#8
2nd Gear Member
Thread Starter
Join Date: Aug 2010
Location: Pawleys Island , South Carolina
Posts: 172
The starting material condition dictates the strength that a particular piston, rod, or crankshaft can have.
Pistons can be cast, centrifugally cast, cast from a hypereutectic alloy, or cast and hot isostatic pressed, finally forged from wrought material. The order listed is in increasing ultimate tensile strength. Also cast pistons yield very slightly before they fracture, compared to wrought pistons, which can yield well before they catastropically fail.
Connecting rods can be cast, forged from powder metal, forged from wrought metal, and forged into H and I beam configurations. Again, forging from powder metal preforms is less expensive than forging from wrought steel or aluminum or titanium, and also has less ultimate or yield strength. Coyote and V6 connecting rods are forged from powder metal, and as such have lower mechanical properties than wrought steel which is forged into a connecting rod. It is best to purchase forged components made from wrought product, especially if you will be exerting near yield strength forces on these components (7800 RPM and above, typically).
Pistons can be cast, centrifugally cast, cast from a hypereutectic alloy, or cast and hot isostatic pressed, finally forged from wrought material. The order listed is in increasing ultimate tensile strength. Also cast pistons yield very slightly before they fracture, compared to wrought pistons, which can yield well before they catastropically fail.
Connecting rods can be cast, forged from powder metal, forged from wrought metal, and forged into H and I beam configurations. Again, forging from powder metal preforms is less expensive than forging from wrought steel or aluminum or titanium, and also has less ultimate or yield strength. Coyote and V6 connecting rods are forged from powder metal, and as such have lower mechanical properties than wrought steel which is forged into a connecting rod. It is best to purchase forged components made from wrought product, especially if you will be exerting near yield strength forces on these components (7800 RPM and above, typically).
08-15-2012, 10:24 AM
#10
So from what Im reading , It is a feasable idea to swap in the rods, pistons and crank from a boss302 into a coyote. I have noticed the #8 cylinder missfire reported to the Coyotes , but havent noticed any reports on Boss 302s. I have read that they cap off the piston squirters on the Boss 302s , is that something I need to do on my coyote block if I go this route? Im building a Coyote with 3800 miles on it that spun a bearing, I have already ordered a new coyote crank , but if I can increase durability by upgrading to the Boss goodies Im thinking I need to go this route. Any knowledge on this course ? Input appreciated.
Boss forged rotating assemblies are sick! I'm looking forward to pics along the way of your build up. Are you planning on running some nitrous or forced induction in the near future? Another AM employee made 700hp on his '12 Boss 302 with a 2.9L whipple! Not too bad for OEM Ford components!
Shane