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Re: Mopar aluminum head P4876624 for Magnum 5.9l
[Re: siggie30]
#498982
11/05/09 06:06 PM
11/05/09 06:06 PM
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Sarasota, Fl
siggie30
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And the other side.... The reference to "valley" is that there is a circular "cut" from the machining and I have been trying to smooth it out somewhat, but have yet to have the courage to totally smooth the area. Anyone have a clue how deep this area would be?
Last edited by siggie30; 11/05/09 06:11 PM.
I don't even have 1/2 lift, but the other 1/2 is nitroused.
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Re: Mopar aluminum head P4876624 for Magnum 5.9l
[Re: siggie30]
#498985
11/06/09 08:56 AM
11/06/09 08:56 AM
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Grand Haven, MI
patrick
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Quote:
And the other side.... The reference to "valley" is that there is a circular "cut" from the machining and I have been trying to smooth it out somewhat, but have yet to have the courage to totally smooth the area. Anyone have a clue how deep this area would be?
search mopar muscles' website for steve's article on the commando heads, and search the race forum for a recent thread on them. the commando/LP commando/alum. mag all have essentialy the the same basic chamber shape. the valves are really shrouded as cast, and it kills flow below .3"....IIRC Steve did a 15 degree deshroud cut and it picked up huge at low RPMs...
here's the thread on the commando heads in the race forum. look at S/ST 3040's posts, especially the first two posts with him....just chamber work picked up 20+ CFM below .4"
Last edited by patrick; 11/06/09 09:12 AM.
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: Mopar aluminum head P4876624 for Magnum 5.9l
[Re: siggie30]
#498987
12/15/09 03:39 PM
12/15/09 03:39 PM
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Sarasota, Fl
siggie30
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Ready to start with the valvetrain. Need suggestions for a total setup. I have yet to get the camshaft as alot of info is contradictory. I guess I really would like to get a spring setup that I can install and purchase the appropriate camshaft later???
I don't even have 1/2 lift, but the other 1/2 is nitroused.
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Re: Mopar aluminum head P4876624 for Magnum 5.9l
[Re: siggie30]
#498988
12/15/09 04:03 PM
12/15/09 04:03 PM
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Grand Haven, MI
patrick
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have you measured installed height with stock magnum valves, retainers and keepers? how much power are you looking to make?
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: Mopar aluminum head P4876624 for Magnum 5.9l
[Re: patrick]
#498989
12/15/09 06:18 PM
12/15/09 06:18 PM
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Sarasota, Fl
siggie30
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Well to be honest I bought new valves, but do not have the keepers, retainers, or springs yet. I am looking to get around 400 or so for streetability. I have an idea for the camshaft, but have not purchased it yet, because it is my understanding that the parts have to be matched. I assume that since the head is considered a direct swap that the original valvetrain can be used, but I have to include "buckets/shims because the heads are aluminum.
I don't even have 1/2 lift, but the other 1/2 is nitroused.
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Re: Mopar aluminum head P4876624 for Magnum 5.9l
[Re: siggie30]
#498990
12/15/09 07:19 PM
12/15/09 07:19 PM
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Kalispell Mt.
HotRodDave
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If you use a stock length valve you will have more spring IH so you can run better springs. Also the stock rockers will not just bolt on, the bolt holes to hold them down are bigger. You can drill the mount pivot thingy bigger for the bigger bolts and buy some good bolts at the hardware store, then you can use the stock rockers. I think they are 11/32 bolt holes because I have some 3/8th studs that are too big and the stock 5/16th are too small.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Mopar aluminum head P4876624 for Magnum 5.9l
[Re: HotRodDave]
#498991
12/15/09 10:42 PM
12/15/09 10:42 PM
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Grand Haven, MI
patrick
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rockers, I'd probably look at the scorpion rockers.
400HP, I'd probably look at sending your cam to hughes and get one of their HER1828AL regrinds.....
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: Mopar aluminum head P4876624 for Magnum 5.9l
[Re: siggie30]
#498993
10/04/10 11:13 PM
10/04/10 11:13 PM
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Sarasota, Fl
siggie30
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I purchased a camshaft from a fellow member here. I believe it is a .485/.495 (ish), with a 113, and approx. 220 degree's at .0500. So my new question is: Since I have these heads, and they are aluminum, I believe you have to use shims under the springs. Any recommendations for springs? I have the new studs, but I still have the original stock valvetrain. I assume that I will need a better spring set, but should I get the heads opened up for chevy size springs or get the 1.42" mopar springs? I bought new stock length valves from hughes (I think). Also, I have read that I can go to a junkyard and salvage springs from other newer dodge 4-6 cyl with similar heads. I am not too savvy about doing that though.
I don't even have 1/2 lift, but the other 1/2 is nitroused.
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Re: Mopar aluminum head P4876624 for Magnum 5.9l
[Re: siggie30]
#498994
10/05/10 11:27 AM
10/05/10 11:27 AM
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Grand Haven, MI
patrick
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use hughes #1110 springs with either their retainers and stock magnum keepers, or if you're on a budget, 2.2/2.5L mopar retainers and magnum keepers....IIRC the 2.2L and magnums are slightly oddball 8 degree keepers vs. the more traditional 7 degree, or race 10 degree...
or it was noted by Rick E-berg on another thread that the magnum valves aren't actually the 8mm that they are advertised at, but 5/16" (7.94mm) stem. that may open up a number of spring/retainer/keeper choices.
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: Mopar aluminum head P4876624 for Magnum 5.9l
[Re: siggie30]
#498995
10/05/10 02:45 PM
10/05/10 02:45 PM
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Kalispell Mt.
HotRodDave
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I have those same heads and if I did not already have the hughes springs #1110 I would look at useing GM behive springs for an LS2 kind of an engine. They will work with the GM retainers and magnum keepers. Being they are GM stuff they are very cheap. Also they are very light weight and should help valve train stability and require less spring preasure than a traditional big retainer and that should help a flat tappet cam live longer. Patrick what do you think of this spring? http://www.summitracing.com/parts/NAL-12499224/1.8 IH is easy on thease heads and they can be shimmed for a little more spring preasure if needed.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Mopar aluminum head P4876624 for Magnum 5.9l
[Re: HotRodDave]
#498996
10/05/10 03:24 PM
10/05/10 03:24 PM
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Grand Haven, MI
patrick
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~370 lb/in, should be nice if you could install at about 1.7", which would net you about .585" valve lift capability, and about 125lb seat pressure....
dunno if you'd have to machine the spring seat on those heads for the 1.25" OD or not....something you'd have to do on a stock magnum head, and in my experience, 1.7" IH on a stock magnum head is kinda tricky...
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: Mopar aluminum head P4876624 for Magnum 5.9l
[Re: patrick]
#498997
10/05/10 05:01 PM
10/05/10 05:01 PM
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Kalispell Mt.
HotRodDave
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Mine are 1.8 IH as is, they are a little different than a stock mag head. I am planning on just shimming them up to the correct IH, lots of room on either side of the spring for bigger or smaller diameter sprnigs as they don't have a step like a factory head and much larger diameter spring pocket. Another thing is the smaller diameter retainer gives you all kinds of rocker to retainer clearance.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Mopar aluminum head P4876624 for Magnum 5.9l
[Re: HotRodDave]
#498998
10/05/10 05:56 PM
10/05/10 05:56 PM
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Sarasota, Fl
siggie30
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Those look like a winner (pressures are about right as well) Where would one find an appropriate "spring cup" to use those GM springs? The head has a base of 1.45 +/-, and the springs are 1.290 +/-. Is there such an animal on the market? I assume the installed height will warrant new pushrods. Sorry, but I have never set up a cylinder head. I will have the work subbed if neccessary, but like doing things myself.
To note, I have a roller cam.
Last edited by siggie30; 10/05/10 05:57 PM.
I don't even have 1/2 lift, but the other 1/2 is nitroused.
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Re: Mopar aluminum head P4876624 for Magnum 5.9l
[Re: siggie30]
#498999
10/12/10 07:07 PM
10/12/10 07:07 PM
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siggie30
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Are these made for W2 headers?
I don't even have 1/2 lift, but the other 1/2 is nitroused.
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Re: Mopar aluminum head P4876624 for Magnum 5.9l
[Re: siggie30]
#499000
10/13/10 01:11 PM
10/13/10 01:11 PM
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Kalispell Mt.
HotRodDave
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The set I am working on would work with the LA headers, it is a little thin on gasket squish area on the bottom edge. TTI sent us some headers 340w2-c and they fit perfect. I always thought the W2 was a different pattern, the first set of thease I had were drilled with 2 different patterns, this set only had one pattern and it matched up OK with an LA gasket and better with a magnum gasket and perfect with the gaskets TTI sent with the headers.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Mopar aluminum head P4876624 for Magnum 5.9l
[Re: HotRodDave]
#499001
11/12/10 07:17 PM
11/12/10 07:17 PM
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Sarasota, Fl
siggie30
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Any info about the cups/shims needing a raised edge? I bought a GM set of springs, retainers, keepers, but need to get a set of 0.030 hardened shims or cups. I looked through VSI and got fairly discouraged. I guess ultimately I am worried about the bottom of the spring walking.
I don't even have 1/2 lift, but the other 1/2 is nitroused.
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Also Ryan at shady-dell might have some pictures that you could look at. I know everyone needs to start somewhere but I think that the chambers need to be done by someone how has experience 
