Coyote engine development article
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Coyote engine development article
This link is to the most detailed fifteen page article on the development of the Coyote that I have seen...
http://www.mustang50magazine.com/tec...ine/index.html
http://www.mustang50magazine.com/tec...ine/index.html
Cobra R Member
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https://themustangsource.com/f726/5-...rticle-480745/
https://themustangsource.com/f726/ma...-5-0-a-479670/
But a healthy read up on the engine can go right in line with many seeing the recent TSB that went out...
Originally Posted by 5.0 Mustang Article
Like current Mustang GT rods, Coyote connecting rods are forged from powdered metal. Optimized for reduced weight and redesigned for uniformed bearing loads around the big end, the Coyote rod eliminates the 4.6's balance pad. These rods are plenty strong for stock rpm and power but will not survive forced induction.
The Coyote team says the forged rod, powdered-metal connecting rod is the least robust link in the 5.0 chain. Engineers noted it is absolutely strong enough for its naturally aspirated application in the Mustang, but just absolutely strong enough...Most ominously, supercharging will require a stronger forged rod...
Like current Mustang GT rods, Coyote connecting rods are forged from powdered metal. Optimized for reduced weight and redesigned for uniformed bearing loads around the big end, the Coyote rod eliminates the 4.6's balance pad. These rods are plenty strong for stock rpm and power but will not survive forced induction.
The Coyote team says the forged rod, powdered-metal connecting rod is the least robust link in the 5.0 chain. Engineers noted it is absolutely strong enough for its naturally aspirated application in the Mustang, but just absolutely strong enough...Most ominously, supercharging will require a stronger forged rod...
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Joined: May 16, 2004
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From: Bristol, TN
Yep, better QC over the metallurgy and less machine work. The Boss uses an upgraded cracked cap PM rod with both the coyote and roadrunner engines using the same rod bolt.
IIRC, the only mod based motors to use an actual forged rod are the Ford GT(40), '00 R, and the Terminator, everything else uses a PM rod. Not that thats a problem, the rods in the GT500 are good nearly to 700 hp and almost 7000 rpm.
The Boss does use a forged piston though since the standard hypereutectic slug doesn't cope well with the increased RPM potential and the roadrunner has the piston squirters capped off due to oil windage issues.
The assembly uses the piston pin from the 5.4 in the GT500 along with rod and main bearings from the GT500 as well.
Other borrowed parts include the metal idler pullies from the 6.2 truck engine since the coyote uses a phenolic idler and under high rpm operation it prevents the bearings from dissapating heat and eventually causes the bearing in the idler to fail.
BTW 5.0 Magazine also did another good article on the Boss with alot of material devoted to the roadrunner engine.
Did spot one problem though, the author seems to think that the Boss is the first Mustang to use a staggered tire fitment or forgot that every GT500 has come equipped with staggered tire fitments since day one otherwise very informative article including a tidbit about using the Boss intake on the standard GT and what some tuners are missing when they tune for the Boss intake.
IIRC, the only mod based motors to use an actual forged rod are the Ford GT(40), '00 R, and the Terminator, everything else uses a PM rod. Not that thats a problem, the rods in the GT500 are good nearly to 700 hp and almost 7000 rpm.
The Boss does use a forged piston though since the standard hypereutectic slug doesn't cope well with the increased RPM potential and the roadrunner has the piston squirters capped off due to oil windage issues.
The assembly uses the piston pin from the 5.4 in the GT500 along with rod and main bearings from the GT500 as well.
Other borrowed parts include the metal idler pullies from the 6.2 truck engine since the coyote uses a phenolic idler and under high rpm operation it prevents the bearings from dissapating heat and eventually causes the bearing in the idler to fail.
BTW 5.0 Magazine also did another good article on the Boss with alot of material devoted to the roadrunner engine.
Did spot one problem though, the author seems to think that the Boss is the first Mustang to use a staggered tire fitment or forgot that every GT500 has come equipped with staggered tire fitments since day one otherwise very informative article including a tidbit about using the Boss intake on the standard GT and what some tuners are missing when they tune for the Boss intake.
Last edited by bob; Jul 7, 2011 at 12:04 AM.
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