Make a 5.9 magnum into a 'crate motor'?
#348720
06/16/09 10:12 AM
06/16/09 10:12 AM
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Joined: Jan 2003
Posts: 7,327 Toronto (YYZ) Ontario
YYZ
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Joined: Jan 2003
Posts: 7,327
Toronto (YYZ) Ontario
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What would it take to make a production 5.9 Magnum ('99 if it matters) into the equivalent of the 300 or 380hp crate motors?
My Durango will probably be retired next year, it's worth nothing on a trade - I would get more for it by selling the rebuilt 518 and the new tires on it than for the whole truck, basically giving me a stout, well maintained 5.9 for free.
Other than accessories, water pump etc., can I just change the intake and oil pan?
What else is different?
Thanks in advance
Last edited by YYZ; 06/16/09 10:23 AM.
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Re: Make a 5.9 magnum into a 'crate motor'?
[Re: YYZ]
#348721
06/16/09 10:18 AM
06/16/09 10:18 AM
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Joined: May 2003
Posts: 15,487 Florida
scratchnfotraction
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cam swap and a carb intakeis all I seen thats diff from stock not sure on the piston though I would just swap in the 380 hp roller cam myself and call it done,IMO scratchin
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Re: Make a 5.9 magnum into a 'crate motor'?
[Re: scratchnfotraction]
#348722
06/16/09 10:59 AM
06/16/09 10:59 AM
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Joined: Jan 2003
Posts: 16,123 Grand Haven, MI
patrick
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both engines used the truck pistons.
other than an LA timing cover, the only differences between a truck and a crate are the .525" lift springs and corresponding retainers, cam (380 horse) and intake.
personally, I'd probably use a comp XR265HR, eddie air gap, and springs to match (GM3100's & retainers if you can get enough IH, or hughes 1110's, etc)...should make similar peak power to the 380 horse crate motor, but with better low speed drivability and torque.
1976 Spinnaker White Plymouth Duster, /6 A833OD 1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!*** 2011 Toxic Orange Dodge Charger R/T 2017 Grand Cherokee Overland 2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: Make a 5.9 magnum into a 'crate motor'?
[Re: 70AARcuda]
#348726
06/16/09 05:34 PM
06/16/09 05:34 PM
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Joined: Apr 2007
Posts: 1,261 ILL
mark7171
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pro stock
Joined: Apr 2007
Posts: 1,261
ILL
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Re: Make a 5.9 magnum into a 'crate motor'?
[Re: mark7171]
#348727
06/16/09 06:35 PM
06/16/09 06:35 PM
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Joined: Jan 2005
Posts: 12,422 Kalispell Mt.
HotRodDave
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99 5.9 factory camshaft in 249 ex269 .410 .417 41 degrees overlap 99 318 factory cam shaft in 250 ex264 .432 .432 31 degrees overlap Mopar magazine did a ex test on the 300 hp crate motor and it made 300 hp with 318 ex manifolds and 325 or so with TTI headers, I would think a better cam and better intake could make 25 more hp
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Make a 5.9 magnum into a 'crate motor'?
[Re: HotRodDave]
#348728
06/16/09 06:49 PM
06/16/09 06:49 PM
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Joined: Feb 2004
Posts: 4,501 Gainesville,FL
goldmember
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I wonder how accurate the published numbers are? I didn't know the 5.9 cam was ground on a 109lsa,the 5.2 with a 113lsa sounds right. I'm guessing it's like most MP cam specs,all over the place and rarley match any published info.LOL Yes the 5.9 stock with a rpm air gap or the knockoff and a set of headers should make the 300hp. Add a better cam and you can pick up plenty without giving up drivability. I helped a friend of mine with a cam swap and a set of R/T heads that I spent 1 hr with,makes 340hp at the tires and runs [Email]12.50@107mph[/Email] in a Dakota.In a 3100lb Abody with 4.10s it should find the 11's . No "quench" and runs fine on 87octane fuel.It's a 1996 engine I picked up out of a junkyard in 2001 that has never been touched.It will get a real set of headers and we'll ditch the single exhaust in the next phase.
Last edited by goldmember; 06/17/09 12:44 AM.
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