Budget 360/ 450 HP
#605034
02/05/10 03:22 PM
02/05/10 03:22 PM
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Joined: Apr 2009
Posts: 228
northeast texas
strokin73cuda
OP
enthusiast
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OP
enthusiast
Joined: Apr 2009
Posts: 228
northeast texas
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I have a 360 whats the best way to get 450 flywheel hp?
496 stroker,Indy srs , new best 6.87 @ 98 1.46 60'
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Re: Budget 360/ 450 HP
[Re: autoxcuda]
#605037
02/05/10 03:42 PM
02/05/10 03:42 PM
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Joined: Apr 2009
Posts: 228
northeast texas
strokin73cuda
OP
enthusiast
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OP
enthusiast
Joined: Apr 2009
Posts: 228
northeast texas
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I have a set of untouched j heads and its a la. Would magnums be better. And cast stroker would be fine wheres the best place to buy one?
496 stroker,Indy srs , new best 6.87 @ 98 1.46 60'
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Re: Budget 360/ 450 HP
[Re: strokin73cuda]
#605038
02/05/10 03:52 PM
02/05/10 03:52 PM
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Joined: Jan 2003
Posts: 27,467
So Cal
autoxcuda
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,467
So Cal
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Quote:
I have a set of untouched j heads and its a la. Would magnums be better. And cast stroker would be fine wheres the best place to buy one?
I'm asking the questions along with you.  I'm in about your same situation.
Question: Least expensive path to 450 hp that's easy on the valvetrain/parts, not a lot of maintance, and a small enough cam that not going to lug and lope real hard?
And the parts you have lying around do factor into the budget. What size valves are in those J Heads you have? That may factor in the decision making.
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Re: Budget 360/ 450 HP
[Re: autoxcuda]
#605039
02/05/10 03:59 PM
02/05/10 03:59 PM
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Joined: Apr 2009
Posts: 228
northeast texas
strokin73cuda
OP
enthusiast
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OP
enthusiast
Joined: Apr 2009
Posts: 228
northeast texas
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1971 j heads from a 340 thier not here so I'm not sure. Just looked them up 1.78 in. 1.50 ex. 
Last edited by strokin73cuda; 02/05/10 04:03 PM.
496 stroker,Indy srs , new best 6.87 @ 98 1.46 60'
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Re: Budget 360/ 450 HP
[Re: strokin73cuda]
#605040
02/05/10 04:08 PM
02/05/10 04:08 PM
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Joined: Jan 2003
Posts: 27,467
So Cal
autoxcuda
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,467
So Cal
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Quote:
1971 j heads from a 340 thier not here so I'm not sure. Just looked them up 1.78 in. 1.50 ex.
Should be 1.88 in and 1.60 ex at least if they are J head.
I thought 71 340 J's are 202 in and 1.60 ex but may have switched to smaller 1.88 intake late in production??? Don't know about that.
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Re: Budget 360/ 450 HP
[Re: strokin73cuda]
#605042
02/05/10 04:21 PM
02/05/10 04:21 PM
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Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
RobX4406
I Live Here
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I Live Here
Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
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Quote:
ok the are 1970 340 t/a head just called the shop
Really???
If so, sell the T/A heads and get a set of RHS x heads from Brian at IMM/indio Motor.
Getting 450hp from a 360 shouldn't be too tough and the RHS x heads would support it no problem.
Check out the 408 build he just did in the race forum.
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Re: Budget 360/ 450 HP
[Re: strokin73cuda]
#605043
02/05/10 04:22 PM
02/05/10 04:22 PM
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Joined: Jan 2003
Posts: 27,467
So Cal
autoxcuda
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,467
So Cal
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Quote:
ok the are 1970 340 t/a head just called the shop
With offset T/A rockers?? I'd get some pics of it to make sure about the ID.
If they are real T/A head you can sell those T/A head cores and pay for some rebuilt or new heads that are better and maybe some money left over for the rest of the motor build.
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Re: Budget 360/ 450 HP
[Re: autoxcuda]
#605044
02/05/10 10:12 PM
02/05/10 10:12 PM
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Joined: Jun 2005
Posts: 793
Utah
topbrent
super stock
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super stock
Joined: Jun 2005
Posts: 793
Utah
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Not to race dyno sheets...but consider this one also. Jesse Lackman built a very stout 520hp/540tq stroker. 408 based on Magnum block Extremely mild, very streetable stroker.... https://board.moparts.org/ubbthreads/show...rue#Post4070225-RHS 360HPST iron heads, 2.02/1.60 -Hughes 236/242 @ .050 Hyd roller .557/.521 lift -stock Magnum hydraulic roller lifters -Dove/Racer brown rockers 1.6 intake 1.5 exhaust -Performer RPM Air Gap -Holley 870 Street Avenger -1 5/8 x 2 3/4 dyno headers -91 octane pump gas -12.5 manifold vacuum @ 950 RPM -398 CTQ @ 2000 RPM -542 CTQ peak @ 4300 RPM -520 CHP peak @ 5900 RPM -500 CTQ from 3200 to 5200 RPM 
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Re: Budget 360/ 450 HP
[Re: Brian Hafliger]
#605046
02/06/10 02:05 AM
02/06/10 02:05 AM
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Joined: Mar 2008
Posts: 724
PA USA
flatiron
super stock
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super stock
Joined: Mar 2008
Posts: 724
PA USA
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Well this is what I'm putting together. Sounds kinda like what your looking for. 1979 360 Purple cam Mopp4120233 with matching springs and lifters cast crank and stock rods .03 KB190 Sealed power rings ZE-251K30 Summit bracket racer damper Summit double roller timing chain Cloyes tennsior B&M Flexplate Crosswind intake 2.02/1.6 J heads ported and polished Prw 1.5 ratio stainless roller rockers Bored .03 over, Square decked to 9.588 and rebalanced Clevite rod and main brgs Actually making the road trip to Summit to pick up my goodies today 
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Re: Budget 360/ 450 HP
[Re: flatiron]
#605047
02/06/10 08:50 AM
02/06/10 08:50 AM
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Joined: Nov 2006
Posts: 1,086
Baton Rouge, La.
StandOnIt
super stock
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super stock
Joined: Nov 2006
Posts: 1,086
Baton Rouge, La.
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My 406" is in your range of power. 97' 5.9 magnum block .020 over MP cast 4" crank (got it from a friend for 200 bucks) Eagle Rods (I Beam) Ross Pistons Basic Rings from Ross MP Hyd Roller camshaft, forget the part# and duration, its the crate motor shaft with .501 int/ .513 ext. Iron Ram heads, stock size 8mm valves and beehives. OOTB MP 1.6 Roller Rockers M1 single plane intake w/ 1" super sucker Proform 750 cfm carb 1 5/8" basic headers Summit Balancer B&M 904 Flexplate And the most important: QUALITY machine work !! Richard Hotard did the crank and a quality race formate shop did the rest of the machining. Setup have been extremely durable and very low maint. Very streetable.
76' Volare, 5.9 magnum w/Iron heads. New best 10.68 at 123 mph 1/4 mile.
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Re: Budget 360/ 450 HP
[Re: Brian Hafliger]
#605048
02/06/10 02:30 PM
02/06/10 02:30 PM
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Joined: Jan 2003
Posts: 27,467
So Cal
autoxcuda
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,467
So Cal
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Quote:
Quote:
I have a 360 whats the best way to get 450 flywheel hp?
Best way or cheapest way? Either mild port eddy heads or these RHS heads will do.
10.3:1, hyd cam around 240@ .050 like Comp 285HL, rpm intake, 750 holley and good headers.
Lets not forget quality machine work!!
What about a 4" stroker 360 block to 450hp?
That will live off of junk california 91 octane Arco gas?
My situation is 85.21 miles to Willow Springs at 3800 rpm cruising. Then run the car on the big track from 8am to 5pm with one 15 minute session per hour. Then drive back. And it's my car to go to the grocery store with too.
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Re: Budget 360/ 450 HP
[Re: StandOnIt]
#605049
02/06/10 03:48 PM
02/06/10 03:48 PM
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Joined: Nov 2006
Posts: 1,457
oklahoma
forphorty
pro stock
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pro stock
Joined: Nov 2006
Posts: 1,457
oklahoma
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Quote:
My 406" is in your range of power.
97' 5.9 magnum block .020 over
MP cast 4" crank (got it from a friend for 200 bucks)
Eagle Rods (I Beam)
Ross Pistons
Basic Rings from Ross
MP Hyd Roller camshaft, forget the part# and duration, its the crate motor shaft with .501 int/ .513 ext.
Iron Ram heads, stock size 8mm valves and beehives. OOTB
MP 1.6 Roller Rockers
M1 single plane intake w/ 1" super sucker
Proform 750 cfm carb
1 5/8" basic headers
Summit Balancer
B&M 904 Flexplate
And the most important: QUALITY machine work !!
Richard Hotard did the crank and a quality race formate shop did the rest of the machining.
Setup have been extremely durable and very low maint. Very streetable.
May i ask, what does it run? Sounds like a good build for my duster.
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Re: Budget 360/ 450 HP
[Re: forphorty]
#605050
02/08/10 10:14 AM
02/08/10 10:14 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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I'd start with a magnum block, stock crank, stock rods w/good bolts. KB107's at 0 deck eq318B's, RHS X or edelbrock heads, will be ~10.5-11:1 range use stock magnum roller lifters, and a roller cam in the .340" lobe lift, and 230@.050" range eddie RPM air gap, and probably an 800cfm eddie thunder series carb, and full lenght headers.
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: Budget 360/ 450 HP
[Re: patrick]
#605051
02/08/10 10:36 AM
02/08/10 10:36 AM
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Joined: Dec 2008
Posts: 603
Central Oregon
Rodney
mopar
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mopar
Joined: Dec 2008
Posts: 603
Central Oregon
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I recently tested a mild 360 that went in a 66 Dart, the engine created 358 hp with no problem. dual plane intake 650 edelbrock 800 made no more HP mild cam lift in the 480's {don't remember specifics} cast iron J heads with no extra work. roller rockers flat top pistons {approx. 9 to 1} balanced rotating components This was a fun engine to test! sipped the premium pump gas and ran Smooooth. According to the volumetric efficiently of this combo a set of heads {more flow} larger cam, more compression and the 800 carburetor {or larger} would be the next upgrades. good luck on your build
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