??? on the 5.9 Magnum
#380753
07/20/09 09:58 AM
07/20/09 09:58 AM
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Joined: Feb 2008
Posts: 2,648 GA
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I was thinking of picking one of these motors up from the scrap yard but i really would like to make it a carb'd motor with a pretty decent camshaft. Anyone convert one of these motors over to a carb and put inan aftermarket camshaft in? How do they run? I was thinking also about putting the od tranny in the dart also....
Any thoughts and opinions are welcomed and appreciated.
2011 RAM3500
1967 Fastback Barracuda with some go fast goodies.
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Re: ??? on the 5.9 Magnum
[Re: OrangeProwler]
#380755
07/20/09 10:19 AM
07/20/09 10:19 AM
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Joined: Jan 2003
Posts: 9,982 Ansonia, CT
CJK440
master
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master
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Ansonia, CT
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I've got a mopar crate magnum in a car I just bought. I haven't driven it yet but its the 380HP magnum crate which I think is just a regular magnum with a good roller and M1 intake. I don't think the heads are anything special and it has 9:1 cr.
380 sounds high to me though.
2017 Contusion Blue Challenger T/A 392 M6 "BLKNBLU"
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Re: ??? on the 5.9 Magnum
[Re: Boosted]
#380756
07/20/09 10:25 AM
07/20/09 10:25 AM
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Joined: May 2003
Posts: 15,487 Florida
scratchnfotraction
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yep,all the old LA front fits on the engine you need to swap in a long nose roller cam,and a flat tappet will work with the right push rods,to run a mech fuel pump you will need valve spring with the cam swap..stock wont take much..GM3100 v-6 springs and retainer IIRC a new intake with the correct bolt angle and carb the old LA dizzy will fit and same headers the old tranny fits with the right flex plate set up just swaping on an intake and headers makes a good improvement on them with a stock engine IIRC there is a felpro vc gasket that can use the 5 bolt vc on the 10 bolt mag head also well worth the effort,IMO I run a pre-mag roller cam 360 headed 318,all stock and a Voodoo cam worth it to just go roller cam,IMO
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Re: ??? on the 5.9 Magnum
[Re: CJK440]
#380757
07/20/09 10:43 AM
07/20/09 10:43 AM
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Joined: Jan 2003
Posts: 16,123 Grand Haven, MI
patrick
I Live Here
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I Live Here
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Posts: 16,123
Grand Haven, MI
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380 horse crate motors regularly dyno 380-410 on an engine dyno....
your cheapest way for getting more cam in there is to get yours reground. contact bulletcams.com about regrinding yours. I just had them regrind the roller cam in my '86 roller motor (I put magnum heads on it). I used the HR259/316 lobe on both the intake and exhaust for my 318. if you want a little rumble/higher RPM powerband, I'd probably look up to the HR273/316 lobe. about .320" lobe lift is the max you can look at without some expensive head work to get more installed height or spring travel before coil bind and seal to retainer clearance. regrind plus shipping there and back was less than $200.
to run a mechanical fuel pump you'll have to swap to an LA t-chain cover and accessory drive, and buy the camshaft snout extender from hughes.
to get springs on there that'll work with a fairly aggressive hydraulic roller lobe, you'll want to get some retainers from a couple 2.2/2.5L mopars in the junkyard and run hughes 1110 springs. you'll be limited to ~.520" valve lift before things start hitting (retainers to seals, coil bind, etc).
comp cams makes some retainers in both 7 degree and 10 degree that might work, and get you a little more installed height. they're for LS1 applications. I couldn't wait for them to get in stock at summitracing before I had to get my magnum heads together to investigate and report on them.
a cheaper (if you pull them off of junkyard heads)/ similar cost (if you buy new) alternative is GM 3100 beehive springs, they provide about .030" less coil bind clearance than the hughes springs, though. again, comp makes some retainers for LS1 applications that might gain a little additional installed height with these springs.
intake, the best options are the RPM air gap for magnums, or redrill the heads for LA intakes. I did the latter, since I couldn't use the eddie magnum air gap due to the water outlet location (offset to pass side), I didn't want to use a chinese manifold (professional product crosswind/summit intake) and I already had an LA RPM air gap. I did it on a bridgeport mill, took about an hour at a machine shop that rented shop time out at $15/hr.
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: ??? on the 5.9 Magnum
[Re: patrick]
#380758
07/20/09 11:32 AM
07/20/09 11:32 AM
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Joined: Sep 2007
Posts: 5,037 hi
sharpie
Moparts Linguist
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Moparts Linguist
Joined: Sep 2007
Posts: 5,037
hi
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I've done the conversion also. Some little tips and tricks here and there, PM me if you need help. This sports a Hughes 1418ALN 520/544 lift, 214/218 @ .050 with a 108 LSA. I run Hughes 1110 springs with Hughes retainers (1278 I think) on RHS iron heads. I couldn't justifty Edelbrock alum heads for the price (these cost me less than half of the price of the Edelbrocks). From the top down, it's running a Holley 4160 650cfm, an Edelbrock Air Gap intake, RHS heads, a Hughes cam which I've previously mentioned, Speedpro pistons and rings, stock rods and crank, a Melling oil pump, and MP LA oil pan.
Last edited by sharpie; 07/20/09 11:39 AM.
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Re: ??? on the 5.9 Magnum
[Re: sharpie]
#380759
07/20/09 12:57 PM
07/20/09 12:57 PM
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Joined: Feb 2008
Posts: 2,648 GA
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That sounds like what I am wanting Sharpie.. I can't see that image here at work but will look at it when I get home...
2011 RAM3500
1967 Fastback Barracuda with some go fast goodies.
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Re: ??? on the 5.9 Magnum
[Re: Boosted]
#380761
07/20/09 06:42 PM
07/20/09 06:42 PM
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Joined: Jan 2008
Posts: 377 Michigan Troll
blk00rt
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I just fired mine up last weekend on my dart. one thing you want to find is a 99 or earlier motor. the reason is 2 piece harmonic balancer and pulley set up. You will also need the fly wheel with the weights as they are externally balanced. I went the with clearwater heads drilled for the la intake manifold. Lot more options there and they were under 400 a piece, with the correct springs for my cam. I have a mp cam in it and hooker headers for a abody. word of advice if you are putting it in a abody go with exhaust manifolds as it will make it easier to get to put the mini starter in. Do not get the chrome oil pan for the car as it will probably not seal right. professional product manifolds are junk, I got one sitting in my garage right now that I took off due to not sealing properly. good luck with your swap and if you have any questions pm me and I will see what advice I can give you.
Rob Dunn 1976 Dart Sport 360 2000 dakota RT 408 with 150 nitrous 2013 Dodge Ram 1500 Hemi 2009 Jeep Patriot
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Re: ??? on the 5.9 Magnum
[Re: sharpie]
#380763
07/20/09 08:05 PM
07/20/09 08:05 PM
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Joined: Jan 2008
Posts: 377 Michigan Troll
blk00rt
enthusiast
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yeah thats what I did with my dart, used the hooker headers and the summit kit. the starter will go in but you may have to put heat wrap on it as it is very close to the headers.
Rob Dunn 1976 Dart Sport 360 2000 dakota RT 408 with 150 nitrous 2013 Dodge Ram 1500 Hemi 2009 Jeep Patriot
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Re: ??? on the 5.9 Magnum
[Re: 360view]
#380767
07/22/09 06:03 PM
07/22/09 06:03 PM
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Joined: Jan 2008
Posts: 377 Michigan Troll
blk00rt
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I let a 5.9 go last year that needed a rebuild, I got like 75 bucks for it. it was long block minus distributor
Rob Dunn 1976 Dart Sport 360 2000 dakota RT 408 with 150 nitrous 2013 Dodge Ram 1500 Hemi 2009 Jeep Patriot
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Re: ??? on the 5.9 Magnum
[Re: Boosted]
#380771
07/24/09 12:33 AM
07/24/09 12:33 AM
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Joined: Aug 2006
Posts: 1,609 Southern Cal
Noblewk
top fuel
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top fuel
Joined: Aug 2006
Posts: 1,609
Southern Cal
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Quote:
I was thinking of picking one of these motors up from the scrap yard but i really would like to make it a carb'd motor with a pretty decent camshaft. Anyone convert one of these motors over to a carb and put inan aftermarket camshaft in? How do they run? I was thinking also about putting the od tranny in the dart also....
Any thoughts and opinions are welcomed and appreciated.
The 5.9 has a shorter deck height then the 360 by .020, 9.58" vice 9.60", keep this in mind when squaring the block. You can have it taken down to 9.56" safely.
For a Center Sump Oil Pan you can use Mopar P5249059. This kit included Pan, Dip stick, Dip stick tube and Oil Pump Pickup.
.020 is cleans the cylinders up good, and utilizing Speed Pro Hyper ZH116CP20 pistons will give you anything between 9:1 to 10:1 depending on the Heads that you use. The skirts are coated also to make them a little more slick.
The Stock rods are good for 400HP or 7000 RPM, but if you think you need stronger one MOPAR has forged rods. The heavy duty rod is P5239745 and the "Light" (Racing)forging is P5249740.
One of the big advantages of using the Magnum is the "Roller Cam" set up. You can have the one in it motor reground, which will require different push rods to correct the geometry or use the MOPAR Crate Motor Cam shafts
P5249663 is a .385"/.401" Lift 250/264 Duration and a 108 center line
P4876348 is a .501"/.513" Lift 288/292 Duration and a 108 center line.
While the lifts are not that radical, keep in mind that these are "Roller" grinds which have a much steeper Ramp angle over either a flat tappet cam, giving you more "under the curve" dwell time for the valves.
The advantage of using either one of the above cams is that the "Fuel Pump" eccentric is built into these cams where regrinding the one that is in the motor will require an adapter if you plan on using a mech fuel pump.
As stated earlier if you plan on using a "Mech" fuel pump then you will need to find a Timing Chain cover from a "LA" engine.
Head Selection is up to you, Flow Characteristics and Chamber size is what you need to watch... The KEY here is Horse Power is built at the "Top" of the engine not the bottom. Heads, Cam, Intake, and Exhaust.
RyanJ from Shady Dell Speed shop is the expert in this arena.
Magnum R/T Big Valve Heads (Cast Iron) Hughes Iron Ram Magnum Heads (Cast Iron) EQ (Engine Quest) Heads (Cast Iron) Edelbrock Magnum (Aluminum)
Head Gaskets Mopar P4876048 are a good 4.06" bore gasket with a .040"-.042" Crush height and are good to 12 to 1 compression. ~$35 a set. You need to watch the bore size!!!!
While both the 360 and 5.9 are externally balanced the balance weight is different. Basically what this means is that you will need to use a different weight set on you torque converter if your planning on using a "LA" Trans (i.e 727,904). Another way around this is to use the B&M Flex Plate BMM-10241 which is correct for the Magnum which allows the use of a "Neutral" balanced converter.
Hope this helps.
Summary. The 5.9 Magnum with the correct parts can easily make 400 "Streetable" horsepower in a durable package.
66 Dart GT, 402 11.18:109 Best
63 1/2 Galaxie 500XL 406 4Speed 13.20:103 Best
2000 Ram
2005 Durango Hemi.
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Re: ??? on the 5.9 Magnum
[Re: Noblewk]
#380772
07/24/09 08:37 AM
07/24/09 08:37 AM
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Joined: Jan 2003
Posts: 9,982 Ansonia, CT
CJK440
master
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master
Joined: Jan 2003
Posts: 9,982
Ansonia, CT
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I've got a 380HP crate that I have yet to "test".
I think it uses stock magnum heads. The newer 390HP crate uses big valve R/T heads but only nets 10hp more.
I suppose it has to do with the low cam lift not letting the big valve heads get into their zone???
2017 Contusion Blue Challenger T/A 392 M6 "BLKNBLU"
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