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Budget build 360 with 425 HP How???? #58065 05/09/08 06:32 PM 05/09/08 06:32 PM
Joined: Jul 2007 Posts: 406 Houma, Louisiana T twister360 OP mopar
twister360 OP mopar T Joined: Jul 2007 Posts: 406 Houma, Louisiana	I would like to build a 360 with about 425 HP for a 75 Dart Sport. How would you do it on a budget and what parts would you use and how much do you think it would be to build? It would be basically a street car with a trip to the track occassionally. 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

Re: Budget build 360 with 425 HP How???? [Re: twister360] #58066 05/09/08 08:13 PM 05/09/08 08:13 PM
Joined: Feb 2003 Posts: 21,318 Manitoba, Canada DaytonaTurbo Too Many Posts
DaytonaTurbo Too Many Posts Joined: Feb 2003 Posts: 21,318 Manitoba, Canada	Not gonna happen unless you go with a stroker setup, which IMO does not fit my definition of a 'budget build'. You can however get 375hp out of a streetable, stock stroke 360. I'm not saying the 425 can't be done, however you'd have to spin it to 7k and run a monster huge cam in it which would not be streetable.

Re: Budget build 360 with 425 HP How???? [Re: twister360] #58067 05/09/08 08:31 PM 05/09/08 08:31 PM
Joined: Apr 2007 Posts: 1,261 ILL mark7171 pro stock
mark7171 pro stock Joined: Apr 2007 Posts: 1,261 ILL	what does the rpm package project? 410 or so

Re: Budget build 360 with 425 HP How???? [Re: DaytonaTurbo] #58068 05/09/08 08:35 PM 05/09/08 08:35 PM
A Anonymous Unregistered
Anonymous Unregistered A	NOS

Re: Budget build 360 with 425 HP How???? #58069 05/09/08 08:39 PM 05/09/08 08:39 PM
Joined: Jul 2007 Posts: 406 Houma, Louisiana T twister360 OP mopar
twister360 OP mopar T Joined: Jul 2007 Posts: 406 Houma, Louisiana	BTW it's going to be a Magnum 360. My dad's car is over 425hp (360 Magnum) and it's not stroked. 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

Re: Budget build 360 with 425 HP How???? [Re: twister360] #58070 05/09/08 09:58 PM 05/09/08 09:58 PM
Joined: Feb 2003 Posts: 12,675 Columbia, CT M moper I Live Here
moper I Live Here M Joined: Feb 2003 Posts: 12,675 Columbia, CT	Have a shop that does performance engine builds do it. There is no budget way to make 1.5hp/cu inch. But you can do it less expensive. If the engine is a running core, you can re-use the spider and lifters. Have the heads done for performance. I'd have to snoop into cam profiles, and I'd run the MP single plane intake, and probably get some good forged dished pistons and run a cam tht wouldnt keep enough vacuum for power brakes but would bleed off pressure. The only issue is, the power wont be there until mid range rpm. Not a ton of torque below 3000 rpm. 425hp will cost you at least $5K done right by someone for you. Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.

Re: Budget build 360 with 425 HP How???? [Re: twister360] #58071 05/09/08 11:51 PM 05/09/08 11:51 PM
Joined: Jan 2005 Posts: 3,699 Newport, Mi Evil Spirit master
Evil Spirit master Joined: Jan 2005 Posts: 3,699 Newport, Mi	Quote: BTW it's going to be a Magnum 360. My dad's car is over 425hp (360 Magnum) and it's not stroked. The crate Mag 380hp 360 makes good power and all they change are the cam, springs, and intake. A production 360 with the same or similar cam/springs/intake, milled and slightly ported heads and you are probably at the 425hp mark that you are trying to do. Free advice and worth every penny... Factory trained Slinky rewinder.........

Re: Budget build 360 with 425 HP How???? [Re: Evil Spirit] #58072 05/10/08 01:15 AM 05/10/08 01:15 AM
Joined: Jan 2003 Posts: 9,870 Weddington, N.C. Streetwize master
Streetwize master Joined: Jan 2003 Posts: 9,870 Weddington, N.C.	400+ is not hard to get out of a well-machined 340-360 if you're willing to run around 11:1 (sealed power flat tops) and a set of cleaned up E heads with a 245-ish @.050 solid cam, and Air gap and a 750 double pumper. I'm essentially building that same combo for a 360 for my 2800 pound Rocky but instead with a 236/242 @.050 Hydraulic roller that should make at least 425. With stock iron heads with only basic bowl and runner work you can probably get around 360-370 without spending a ton of green..to go past that you'll have to put enough int othe heads that you might as well get some eddies. Shop around, I found a pair of N.I.B closed chamber Eddies and an RPM intake for $1100.00. 400 hp is only about 1.12 out of a 360, not too hard to get if the heads flow enough air and the bottom end doesn't have to fight itself with poor machining. WIZE World's Quickest Diahatsu Rocky (??) 414" Stroker Small block Mopar Powered. 10.84 @ 123...and gettin' quicker! https://www.youtube.com/watch?v=-mWzLma3YGI In Car: https://www.youtube.com/watch?v=PjXcf95e6v0

Re: Budget build 360 with 425 HP How???? [Re: Streetwize] #58073 05/10/08 07:41 AM 05/10/08 07:41 AM
Joined: Aug 2004 Posts: 3,333 MARYLAND 69Cuda340S master
69Cuda340S master Joined: Aug 2004 Posts: 3,333 MARYLAND	If if primarily a street car I would focus on a pump gas combination with the biggest torque curve. Forget about the hp number. Torque is what moves the car.

Re: Budget build 360 with 425 HP How???? [Re: Evil Spirit] #58074 05/10/08 11:05 AM 05/10/08 11:05 AM
Joined: Jan 2005 Posts: 12,419 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,419 Kalispell Mt.	Quote: Quote: BTW it's going to be a Magnum 360. My dad's car is over 425hp (360 Magnum) and it's not stroked. The crate Mag 380hp 360 makes good power and all they change are the cam, springs, and intake. A production 360 with the same or similar cam/springs/intake, milled and slightly ported heads and you are probably at the 425hp mark that you are trying to do. This is exactly what you need to do. For that amount of hp get the KB pistons #107 or the forged counterpart but hyper would be fine and budget oriented. Do some basic clean up of the ports, open the bowls, and pushrod pinch a little, get the valves back cut, and smooth the ports out a little. Un ported those heads can easyly make a 400 hp street 318 so get a little mo flow and cubes and 425 is not hard at all and don't really need to turn much over 6000, mabey 6500 tops. I am not causing global warming, I am just trying to hold off a impending Ice Age!

Re: Budget build 360 with 425 HP How???? [Re: DaytonaTurbo] #58075 05/10/08 01:59 PM 05/10/08 01:59 PM
Joined: Jul 2005 Posts: 1,044 minnesota P president61 super stock
president61 super stock P Joined: Jul 2005 Posts: 1,044 minnesota	Quote: Not gonna happen unless you go with a stroker setup, which IMO does not fit my definition of a 'budget build'. You can however get 375hp out of a streetable, stock stroke 360. I'm not saying the 425 can't be done, however you'd have to spin it to 7k and run a monster huge cam in it which would not be streetable. I totally disagree. High Performance Mopar mag. did a build up several years ago and got 430hp from a mild 360. Pump gas, ported smog heads, Thermo carb, and stock crank. If you want I can look up the exact specs.

Re: Budget build 360 with 425 HP How???? [Re: president61] #58076 05/10/08 02:33 PM 05/10/08 02:33 PM
Joined: Jan 2008 Posts: 508 Ontario, Canada 8 84Stepside mopar
84Stepside mopar 8 Joined: Jan 2008 Posts: 508 Ontario, Canada	i would be interested in the specs

Re: Budget build 360 with 425 HP How???? [Re: 84Stepside] #58077 05/10/08 03:34 PM 05/10/08 03:34 PM
Joined: Jan 2003 Posts: 6,988 Warren, MI J Jerry master
Jerry master J Joined: Jan 2003 Posts: 6,988 Warren, MI	if you have a running engine then i would just do a cam change and slap on a supercharger. 425hp should be pretty easy. if your going to add new pistons, then figure reconditioned rods, turned crank, and bore and hone the block. your already looking at about $2500 worth of work when you include the heads. a supercharger isn't much more expensive and has alot of potential. also you can get a used setup for a small block chevy off of ebay, if you don't mind doing some fabricating Superior Design Concepts 2574 Elliott Dr Troy MI 48083 jerry@sdconcepts.com www.sdconcepts.com Facebook page: Superior Design Concepts www.bcrproducts.com

Re: Budget build 360 with 425 HP How???? [Re: Jerry] #58078 05/10/08 07:33 PM 05/10/08 07:33 PM
Joined: Jul 2007 Posts: 406 Houma, Louisiana T twister360 OP mopar
twister360 OP mopar T Joined: Jul 2007 Posts: 406 Houma, Louisiana	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? 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

Re: Budget build 360 with 425 HP How???? [Re: twister360] #58079 05/10/08 08:03 PM 05/10/08 08:03 PM
Joined: Jul 2007 Posts: 406 Houma, Louisiana T twister360 OP mopar
twister360 OP mopar T Joined: Jul 2007 Posts: 406 Houma, Louisiana	Also, would it be possible to just buy the complete Magnum engine, throw in a fairly aggressive campshaft, RPM Air Gap or Victor intake, 750 Holley and a set of good headers? I'm a total noob, but being that the engine is in a running vehicle and still runs well, would there be any problem going this route for the time being? Then when funds are not so much of an issue I can pull out the motor and go through it? Remember I'm a noob so take it easy on me! Just trying to have fun fellas! 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

Re: Budget build 360 with 425 HP How???? [Re: twister360] #58080 05/10/08 08:11 PM 05/10/08 08:11 PM
Joined: Aug 2004 Posts: 3,547 stratford,ontario,canada JD340 master
JD340 master Joined: Aug 2004 Posts: 3,547 stratford,ontario,canada	Quote: BTW it's going to be a Magnum 360. My dad's car is over 425hp (360 Magnum) and it's not stroked. That right there sounds like a good place to start. Is his also a budget build? Nothing to see here. Carry on.

Re: Budget build 360 with 425 HP How???? [Re: 84Stepside] #58081 05/10/08 08:52 PM 05/10/08 08:52 PM
Joined: Jul 2005 Posts: 1,044 minnesota P president61 super stock
president61 super stock P Joined: Jul 2005 Posts: 1,044 minnesota	Quote: i would be interested in the specs I found the build up I was thinking of but its not the right one. I'll keep looking. Anyway this particular build up consisted of: 78 360 block and heads(home ported), 9:1 comp, Summit cam 441 lift, Performer RPM, 750 Holley, Hedman headers, and quality machine work. It moved a 1972 Challenger to Mid 12s. they didn't give any HP#s.

Re: Budget build 360 with 425 HP How???? [Re: twister360] #58082 05/10/08 09:19 PM 05/10/08 09:19 PM
Joined: Jan 2005 Posts: 12,419 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,419 Kalispell Mt.	If you pretty much want to keep what you have then pull the heads off dissasemble the short block and have .070 taken off the deck to get the pistons at zero deck. Use a .039 felpro head gasket. Doing this will give a little more compression and quench, both of witch will help hp and tq. Put in a nice roller cam about like the crate motors and a airgap intake. You would only have to buy a gasket set and about $100 machine work and 400 hp is very easy, it would probably make about 415. A little port touch up and a back cut of the valves should give the 425hp. $800 is a little high around here but not much. $800 will get a late production low miles 360 mag motor here. I am not causing global warming, I am just trying to hold off a impending Ice Age!

Re: Budget build 360 with 425 HP How???? [Re: president61] #58083 05/11/08 01:42 AM 05/11/08 01:42 AM
Joined: Feb 2003 Posts: 21,318 Manitoba, Canada DaytonaTurbo Too Many Posts
DaytonaTurbo Too Many Posts Joined: Feb 2003 Posts: 21,318 Manitoba, Canada	Quote: Quote: Not gonna happen unless you go with a stroker setup, which IMO does not fit my definition of a 'budget build'. You can however get 375hp out of a streetable, stock stroke 360. I'm not saying the 425 can't be done, however you'd have to spin it to 7k and run a monster huge cam in it which would not be streetable. I totally disagree. High Performance Mopar mag. did a build up several years ago and got 430hp from a mild 360. Pump gas, ported smog heads, Thermo carb, and stock crank. If you want I can look up the exact specs. Again, I doubt that build fits the OP's "budget build" requirement. The headwork needed to get there(or the $ for the aftermarket magnum r/t heads the crate engines run, or other aftermarket heads) plus machine work, plus all required parts, and you total up the $ spent at the end and that does not fit my definition of a budget build, maybe yours, but not mine.

Re: Budget build 360 with 425 HP How???? [Re: DaytonaTurbo] #58084 05/11/08 03:50 AM 05/11/08 03:50 AM
Joined: Jul 2007 Posts: 406 Houma, Louisiana T twister360 OP mopar
twister360 OP mopar T Joined: Jul 2007 Posts: 406 Houma, Louisiana	After the complete motor is bought. My budget would be in the 2000 dollar range to build it up. 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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