Posted By: strokin73cuda
Budget 360/ 450 HP - 02/05/10 07:22 PM
I have a 360 whats the best way to get 450 flywheel hp?
Budget 360/ 450 HP
Posted By: goldmember
Re: Budget 360/ 450 HP - 02/05/10 07:26 PM
A 200 shot should do it.
Posted By: autoxcuda
Re: Budget 360/ 450 HP - 02/05/10 07:36 PM
Wow about cast crank strokers for 450hp:
360 LA or/vs 360 magnum?
E-brock vs RHS vs X or J head?
Like this maybe with smaller cam??? Which cam?
https://board.moparts.org/ubbthreads/show...e=0#Post5784366
360 LA or/vs 360 magnum?
E-brock vs RHS vs X or J head?
Like this maybe with smaller cam??? Which cam?
https://board.moparts.org/ubbthreads/show...e=0#Post5784366
Posted By: strokin73cuda
Re: Budget 360/ 450 HP - 02/05/10 07:42 PM
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?
Posted By: autoxcuda
Re: Budget 360/ 450 HP - 02/05/10 07:52 PM
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.
Posted By: strokin73cuda
Re: Budget 360/ 450 HP - 02/05/10 07:59 PM
1971 j heads from a 340 thier not here so I'm not sure. Just looked them up 1.78 in. 1.50 ex. 
Posted By: autoxcuda
Re: Budget 360/ 450 HP - 02/05/10 08:08 PM
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.
Posted By: strokin73cuda
Re: Budget 360/ 450 HP - 02/05/10 08:12 PM
ok the are 1970 340 t/a head just called the shop
Posted By: RobX4406
Re: Budget 360/ 450 HP - 02/05/10 08:21 PM
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.
Posted By: autoxcuda
Re: Budget 360/ 450 HP - 02/05/10 08:22 PM
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.
Posted By: topbrent
Re: Budget 360/ 450 HP - 02/06/10 02:12 AM
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
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
Posted By: Brian Hafliger
Re: Budget 360/ 450 HP - 02/06/10 05:05 AM
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!!
Posted By: flatiron
Re: Budget 360/ 450 HP - 02/06/10 06:05 AM
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
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
Posted By: StandOnIt
Re: Budget 360/ 450 HP - 02/06/10 12:50 PM
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.
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.
Posted By: autoxcuda
Re: Budget 360/ 450 HP - 02/06/10 06:30 PM
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.
Posted By: forphorty
Re: Budget 360/ 450 HP - 02/06/10 07:48 PM
Quote:May i ask, what does it run? Sounds like a good build for my duster.
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.
Posted By: patrick
Re: Budget 360/ 450 HP - 02/08/10 02:14 PM
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.
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.
Posted By: Rodney
Re: Budget 360/ 450 HP - 02/08/10 02:36 PM
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
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