Re: two questions on a 360 magnum
[Re: 74dust]
#1113336
11/14/11 09:19 AM
11/14/11 09:19 AM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
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Quote:
Question 1: Are the internals in a 360 magnum the same as the internals in a LA360? EXE: are the cams / pistons ect. interchangeable?
Question 2: I am on a tight budget and want to get the most bang for my buck i want to turbo it in the end but cant afford it all at once what are some of yalls HO 360 magnum builds? 
Q1) yes and no. same bore, same crank casting, but slightly lighter rods with narrower small ends, different pistons with metric rings. but you can buy aftermarket pistons (say, KB107's) and put them in. cams are roller cams, flat tappet cams can be run with a change in pushrods, or the roller cam can be reground/replaced with another roller cam. roller lifters can be reused if in good shape.
the original 380HP crate motor wsa a standard truck magnum with different valve springs, cam, and single plane intake.
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: two questions on a 360 magnum
[Re: patrick]
#1113337
11/14/11 09:41 AM
11/14/11 09:41 AM
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Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
70Cuda383
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Marysville, O-H-I-O
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tight budget and turbo build do not go together.
you're gonna want an all new bottom end to throw boost at it, all forged parts, which will run as much as building a 408 stroker. then you're gonna need heads, exhaust, intake, and then all the turbo stuff.
you could get up into the 375-400 hp range with a cam swap on a stock truck 360.
if you want more power than that, then consider simply swapping pistons for around $250, plus a balance job, new pistons will bump your compression up to around 10.5:1, then step up to edelbrock heads, and you'll be able to hit 450-500 hp with a stock stroke 360, the right cam, and RPM to get there.
cheaper and easier than a turbo, and if you do go turbo, you're gonna be limited by the stock block to about 650 hp.
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Re: two questions on a 360 magnum
[Re: 74dust]
#1113339
11/15/11 10:05 AM
11/15/11 10:05 AM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
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I Live Here
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Grand Haven, MI
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depends on car weight, rear gear, what you want to do as far as driving (1/4 mile at a time, or highway trips), etc.
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: two questions on a 360 magnum
[Re: 74dust]
#1113340
11/15/11 10:25 AM
11/15/11 10:25 AM
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Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
70Cuda383
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Too Many Posts
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Posts: 21,345
Marysville, O-H-I-O
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Quote:
Has anyone got specs on a ideal 360 build?
like patrick said, how are you gonna use it?!
but, assuming a street cruiser, weekend toy in a car...
my ideal build would look like this:
KB Hypereutectic pistons, domed w/valve reliefs std bore or .020/.030 if your block needs it. $250
Eagle forged rods $230
Stock cast crank -- free
Balance job, crank polish, etc. ~$200
Rings $60
that gives you a bottom end good for about 10.5:1 compression and good for probably 500 hp for less than a grand. or if you need block work, then maybe you'll end up at $1500-2000
some $1500 edelbrock heads
intake/headers/carb/cam of your choice, and you've got a 450-ish Hp small block for less than the price of the "380hp small block crate motor"
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Re: two questions on a 360 magnum
[Re: 70Cuda383]
#1113341
11/15/11 11:32 AM
11/15/11 11:32 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
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
Quote:
Has anyone got specs on a ideal 360 build?
like patrick said, how are you gonna use it?!
but, assuming a street cruiser, weekend toy in a car...
my ideal build would look like this:
KB Hypereutectic pistons, domed w/valve reliefs std bore or .020/.030 if your block needs it. $250
Eagle forged rods $230
Stock cast crank -- free
Balance job, crank polish, etc. ~$200
Rings $60
that gives you a bottom end good for about 10.5:1 compression and good for probably 500 hp for less than a grand. or if you need block work, then maybe you'll end up at $1500-2000
some $1500 edelbrock heads
intake/headers/carb/cam of your choice, and you've got a 450-ish Hp small block for less than the price of the "380hp small block crate motor"
if you plan on a piston swap, I'd go KB107's, they're flat tops, set them for 0 deck, .039" fel pro head gasket, and 63ccish heads yield about 10.6:1.
I'd reuse the stock rods with new bolts, reuse the stock crank.
if your heads are usable, use hughes #1110 springs and their retainers. have a valve job done, opening the seats up to 1.9/1.605" (the stock VJ is undersized), open the pushrod pinch up some, and do some bowl blending. if your heads are unusable, I'd get some enginequest 318B's or some RHS's from either hughes or Brian at IMM.
intake, I'd use an edelbrock air gap
I'd use 1 5/8" headers
cam, I'd look for a roller in the 220-224@.050 duration, with about .340" lobe lift max. I'd probably use stock rockers for now.
I'd probably see if the stock cam can be reground by bullit cams using their HR274/340 lobe for both intake and exhaust.
http://bulletcams.com/Masters/HRlobes.htm
I'd wager it would be an honest 370-410hp depending on carb and how well the heads are prepped.
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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