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Re: Budget build 360 with 425 HP How????
[Re: twister360]
#58085
05/11/08 10:28 AM
05/11/08 10:28 AM
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Joined: Jul 2003
Posts: 4,769
Holland MI Ottawa
2boltmain
master
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master
Joined: Jul 2003
Posts: 4,769
Holland MI Ottawa
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"Ported heads" may sound simple but really they are not part of a tight budget. ANYTIME a professional goes into a set of heads to increase flow/velocity it is $$$$$. In fact it is so expensive that it very quickly approaches and matches the price of a set of Eddies. If the price of a set of Eddies is not in the budget than I doubt any type of porting is. That said the goal must be realistic for the budget.
Keep old mopars alive.
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Re: Budget build 360 with 425 HP How????
[Re: twister360]
#58086
05/11/08 11:26 AM
05/11/08 11:26 AM
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Joined: Jan 2005
Posts: 3,699
Newport, Mi
Evil Spirit
master
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master
Joined: Jan 2005
Posts: 3,699
Newport, Mi
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Quote:
After the complete motor is bought. My budget would be in the 2000 dollar range to build it up.
Ya probably need to decide is the $2k budget for the motors hard parts, or does that include carb, headers, ignition, fuel lines and fittings, etc. That can easily add a grand or more to the tab. Following prices are approximate. My approach is if I had a sound 360 Mag core, as in didn't need rebuilt, AND a $2k ENGINE BUDGET, first I'd price a HV oil pump, pump drive, timing chain, and a premium gasket set ($350). New oil pan/pick up to fit chassis? If so, add for it ($200) Next - intake ($300). Cam/springs/rockers/pushrods next ($700). Once I know what I would spend on these items, I could see how much cylinder head work I could afford, which along with cam selection, is where the power is made. At that point, I'd pull the heads and check for cracks, etc. With some shopping around (e-bag/swap meets, etc.) you can probably buy cheaper than the prices that I said. Any good head or machine shop should be able to do a valve job, mill, a little port swabbing, and assemble in the $600 range; again, PRICE. At this time you can make informed choices on where to spend your money. 
Free advice and worth every penny...
Factory trained Slinky rewinder.........
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Re: Budget build 360 with 425 HP How????
[Re: twister360]
#58088
05/11/08 12:55 PM
05/11/08 12:55 PM
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Joined: Mar 2006
Posts: 1,611
Pataskala, Ohio
GTX70sixpack
top fuel
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top fuel
Joined: Mar 2006
Posts: 1,611
Pataskala, Ohio
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Quote:
Some great replies. Like I said I'm going to be getting a running 360 Magnum motor. My main thing will be figuring out what parts I'm going to go with and shop around for the best prices. I'll probably go with what my dads current setup is, but not go through the machine shop for parts. The Magnum motor that I'm looking to purchase is from a van and the price is $800. Which seems to be a little high, should I offer less?
Very high, we just bought a 94 1 ton van in good condition for 500 bucks, the diff is very noisey, 360 motor and OD trans are great.
On the 360, new pistons are a must, compression needs to come up, big cams make it even worse. My son just built a 360 and didn't buy pistons because he's building another short block with a stroker kit. Car is only good for high 13's in it's current state, more compression would have been a big plus.
65 Belvedere II Station Wagon
69 Coronet R/T convertible
70 GTX
70'cuda
99 Dodge Diesel dually 4X4
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Re: Budget build 360 with 425 HP How????
[Re: GTX70sixpack]
#58089
05/11/08 08:54 PM
05/11/08 08:54 PM
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Joined: Mar 2005
Posts: 2,172
Ohio
theclutcher
top fuel
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top fuel
Joined: Mar 2005
Posts: 2,172
Ohio
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low compression shortblock about 8.5 to 1 mill heads to get 9 to 1.
factory heads can make 250 air at .500 lift pretty easy.
that and a .500 lift cam and its pretty much there.
add a nice intake, carb, headers and speedway 87 be happy with simple.
Last edited by theclutcher; 05/11/08 08:57 PM.
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Re: Budget build 360 with 425 HP How????
[Re: twister360]
#58090
05/11/08 09:09 PM
05/11/08 09:09 PM
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Joined: Mar 2003
Posts: 4,929
Tri-Cities, Washington
VITC_GTX
master
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master
Joined: Mar 2003
Posts: 4,929
Tri-Cities, Washington
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Quick and dirty on my 360:
'97 5.9 Magnum complete from a truck, 87K miles
Scott Brown cam 226/238 @ .050, .520"
Three angle valve job, machined down valve guides to accomodate higher lift
MP valve spring and retainers
Crane roller rockers
Eddy Air-Gap intake
Eddy 650 AVS
1 5/8" Hooker headers
Put this in my Demon and on my 7th run I hit 12.76 @ 105.5. Remember this was not only the cars 7th run but my 7th run as a driver. The shortblock is 100% untouched. I used the original pistons, rods, crank, bearing, rings, even the oil pump. I never even took it apart to inspect it. The cylinder walls still had crosshatch in them. I paid $700 for the complete motor from a local JY, I paid less than $2000 for the balance of the motor. Seems pretty close to what you're looking for.
Compared to the old MP 380 horse Magnum I have a larger lift cam and roller rockers but it uses a 750 cfm carb and 1 3/4" headers. I still believe that I have 400 horse. With the larger carb and headers I bet I would be close to 425.
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Re: Budget build 360 with 425 HP How????
[Re: HotRodDave]
#58092
05/11/08 11:05 PM
05/11/08 11:05 PM
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Joined: Mar 2003
Posts: 4,929
Tri-Cities, Washington
VITC_GTX
master
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master
Joined: Mar 2003
Posts: 4,929
Tri-Cities, Washington
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Quote:
VITC i like your combo  I bet with just a .070 mill on the block to get those pistons zero deck and some very mild touch up you would get a nice extr load of TQ down low then add the 750 carb and you would probably have 450 hp. That is a real nice cam spec for a stock long block
I am really happy with it and it was my first engine build! On my next one I think I will do more like you suggested...maybe a stroker 
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Re: Budget build 360 with 425 HP How????
[Re: Streetwize]
#58093
05/12/08 09:49 PM
05/12/08 09:49 PM
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Joined: Jul 2007
Posts: 406
Houma, Louisiana
twister360
OP
mopar
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OP
mopar
Joined: Jul 2007
Posts: 406
Houma, Louisiana
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Would you recommend a set of Magnum RT's or Eddies? Would the RT's need additional porting to come up to the Eddies?
Thanks
My car 74 Duster mild 360/904/3.91 13.44/101.54
Son's car 75 Dart Sport 318/904/4.10 looking for a 360 or 408
2004 Dodge Ram 1500 Laramie 5.7
2010 Dodge Challenger R/T Classic B-5 6 speed
2010 Jeep SRT8 for the little wife
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Re: Budget build 360 with 425 HP How????
[Re: 2boltmain]
#58094
05/12/08 10:06 PM
05/12/08 10:06 PM
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Joined: Jul 2005
Posts: 1,044
minnesota
president61
super stock
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super stock
Joined: Jul 2005
Posts: 1,044
minnesota
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Quote:
"Ported heads" may sound simple but really they are not part of a tight budget. ANYTIME a professional goes into a set of heads to increase flow/velocity it is $$$$$. In fact it is so expensive that it very quickly approaches and matches the price of a set of Eddies. If the price of a set of Eddies is not in the budget than I doubt any type of porting is. That said the goal must be realistic for the budget.
thats true. the heads in this build up were home ported. I don't know if the originator of this thread can do that himself. That would make all of the difference
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Re: Budget build 360 with 425 HP How????
[Re: president61]
#58095
05/12/08 10:55 PM
05/12/08 10:55 PM
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Joined: Jul 2007
Posts: 406
Houma, Louisiana
twister360
OP
mopar
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OP
mopar
Joined: Jul 2007
Posts: 406
Houma, Louisiana
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Which would flow better--- Eddies or Magnum R
T's? And how much would it effect HP?
My car 74 Duster mild 360/904/3.91 13.44/101.54
Son's car 75 Dart Sport 318/904/4.10 looking for a 360 or 408
2004 Dodge Ram 1500 Laramie 5.7
2010 Dodge Challenger R/T Classic B-5 6 speed
2010 Jeep SRT8 for the little wife
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Re: Budget build 360 with 425 HP How????
[Re: twister360]
#58098
05/14/08 09:08 AM
05/14/08 09:08 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:
BTW it's going to be a Magnum 360. My dad's car is over 425hp (360 Magnum) and it's not stroked.
short block:
KB107's on stock rods that are resized w/arp bolts
stock crank. set them up at 0 deck, use a .039" compressed gasket.
heads:
if the heads are overall in decent shape (no cracks, don't need valves) have the heads gone through, with a 5 angle valve job w/a 75 degree throat cut, open the bowls to about 85-90% the diameter of the valves. do some basic blending of the valve job into the bowl, and smooth out the short turn. profile the valve guide bosses, and open up the pushrod pinch as much as you're comfortable. I'd get the guides cut down a skoash for more lift capability, find some 2.2L retainers and get the MP .6" lift springs.
if the heads need valves or guides, use some SBC 11/32 stem valves .1" longer than stock, ream the guides out to 11/32, and then the world is your oyster for retainers and springs.
if the heads are cracked, talk to http://www.cmengines.com/
for some enginequest 318B heads built up using SBC valves. they quoted me a good price ($850/pr assembled with springs capable of running a hydraulic roller w/.55" lift)
intake, I'd use a magnum air gap, or LD340/RPM/air gap if you get the heads redrilled with LA intake pattern.
cam, I'd talk to one of the many cam grinders to get a hydraulic roller cam ground with ~230-235@.050 intake, about 5 degrees more exhaust, and about .530-.550 lift with the magnum 1.6 rockers. I'd reuse the OEM roller lifters.
add some headers, and 425 should be a walk in the park. with the worked heads and ~10.8 compression they'll give with a 0 deck flat top short block, you might be able to get away with less cam and still make the power number.
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 build 360 with 425 HP How????
[Re: patrick]
#58099
05/14/08 10:50 PM
05/14/08 10:50 PM
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Joined: Jul 2007
Posts: 406
Houma, Louisiana
twister360
OP
mopar
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OP
mopar
Joined: Jul 2007
Posts: 406
Houma, Louisiana
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I have located a 360 motor from a running 99 Dodge with 109,000 miles. Would this be a better block to build from verses and older block? Are these the heads you would build from in an econo build? Does anyone know the price of a set of magnum RT"s?
My car 74 Duster mild 360/904/3.91 13.44/101.54
Son's car 75 Dart Sport 318/904/4.10 looking for a 360 or 408
2004 Dodge Ram 1500 Laramie 5.7
2010 Dodge Challenger R/T Classic B-5 6 speed
2010 Jeep SRT8 for the little wife
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Re: Budget build 360 with 425 HP How????
[Re: twister360]
#58100
05/15/08 08:22 AM
05/15/08 08:22 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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block is the same for any mag 360, basically...I'd use those heads, too....the only difference between that truck motor and the 380HP crate motor is basically cam, intake, and valve springs.
unported stock magnum heads will support ~410-420hp or so, a little clean up/opening up in the pushrod pinch and bowl and a good valve job and they'll support 450-475 hp...
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 build 360 with 425 HP How????
[Re: patrick]
#58101
05/15/08 09:28 AM
05/15/08 09:28 AM
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Joined: Jul 2007
Posts: 406
Houma, Louisiana
twister360
OP
mopar
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OP
mopar
Joined: Jul 2007
Posts: 406
Houma, Louisiana
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Would you use the crank and rods if they check out good? What about the oil pump...change to a HV or go back with stock? I guess the oil pan would be different to go into a 75 Dart Sport, right? Any and all suggestions are welcomed, thanks for all the replies.
My car 74 Duster mild 360/904/3.91 13.44/101.54
Son's car 75 Dart Sport 318/904/4.10 looking for a 360 or 408
2004 Dodge Ram 1500 Laramie 5.7
2010 Dodge Challenger R/T Classic B-5 6 speed
2010 Jeep SRT8 for the little wife
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Re: Budget build 360 with 425 HP How????
[Re: twister360]
#58102
05/15/08 10:44 AM
05/15/08 10:44 AM
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Joined: Jul 2005
Posts: 69
BC Canada
cudasam
member
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member
Joined: Jul 2005
Posts: 69
BC Canada
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crosswind 360 intake 240 @ .050 cam +- 750 double pumper tube headers drive it 
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Re: Budget build 360 with 425 HP How????
[Re: patrick]
#58104
05/15/08 12:33 PM
05/15/08 12:33 PM
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Joined: Jan 2003
Posts: 6,266
Renton Washington
Triple Threat
master
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master
Joined: Jan 2003
Posts: 6,266
Renton Washington
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Power is in the heads PERIOD! My car went from 13.80 to 12.80 going from 915 casting 2.02 heads to OOTB 63cc edelbrocks. No other changes were made.
My motor is just a basic 9:1 340, with a decent set of heads on it.
IMO don't mess around with anything iron/factory unless you already have them. I sold my heads I took off for $300 so I basically have $1000 into my new heads, my car makes way more power, and I took weight off the nose of the car.
-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
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