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318 build #1348020 12/08/12 06:39 PM 12/08/12 06:39 PM
Joined: Jun 2012 Posts: 45 california D dragduster71 OP member
dragduster71 OP member D Joined: Jun 2012 Posts: 45 california	im gonna be getting a 72 3/4 ton crew cab powerwagon,its got a 318 and im gonna keep it a 318 mainly because of reliability i would never use a 360,so im 100% staying with the good ol 318,my plans so far is to buy a reman shortblock a xe268 cam kit and some reman 302 heads on ebay ive seen 318 builds with these parts at 400hp but im not gonna do any portwork,just out of the box its a truck i just want a little more power and for it to sound good,this should be a good engine for this truck?oh and its a 4 speed.

Re: 318 build [Re: dragduster71] #1348021 12/08/12 07:13 PM 12/08/12 07:13 PM
Joined: Dec 2006 Posts: 3,396 Pa Hot 340 master
Hot 340 master Joined: Dec 2006 Posts: 3,396 Pa	I would never use a 360 either. Total junk and entirely different motor than a 318.

Re: 318 build [Re: Hot 340] #1348022 12/08/12 08:15 PM 12/08/12 08:15 PM
Joined: Jun 2012 Posts: 45 california D dragduster71 OP member
dragduster71 OP member D Joined: Jun 2012 Posts: 45 california	every 360 ive pulled the pan on has had some really bad ate up bearings in them. im not affraid of small cubic inches look at the ford 302.plus 318's are erywhere and for free or really cheap and very reliable engines in my experiance it has been the only reliable dodge engine besides the slant 6,i still love every engine chrysler has made dont get me wrong,i will never own anything besides a mopar,or a my corolla lol

Re: 318 build [Re: dragduster71] #1348023 12/09/12 01:26 PM 12/09/12 01:26 PM
Joined: Jan 2003 Posts: 3,920 n.e. pa. 6 65rbdodge master
65rbdodge master 6 Joined: Jan 2003 Posts: 3,920 n.e. pa.	sounds like a good combo to me.

Re: 318 build [Re: 65rbdodge] #1348024 12/09/12 02:03 PM 12/09/12 02:03 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	I would suggest building one with quench which would let you run more scr on the exact same octane for more torque with it being cube limited but that'd for sure be alot more time/money than just purchasing a built short block live every 24 hour block of time like it's your last day on earth

Re: 318 build [Re: dragduster71] #1348025 12/09/12 02:35 PM 12/09/12 02:35 PM
Joined: Nov 2006 Posts: 1,459 oklahoma F forphorty pro stock
forphorty pro stock F Joined: Nov 2006 Posts: 1,459 oklahoma	It will run fine with the XE268, but if it were mine i would go a step smaller on the cam . I think the low end will be soft in a stock 318 powerwagon with that cam. Even the XE262 is a tad bit hotter than a factory 340 cam. http://www.moparmusclemagazine.com/techa...ns/viewall.html Last edited by forphorty; 12/09/12 02:57 PM.

Re: 318 build [Re: forphorty] #1348026 12/09/12 05:22 PM 12/09/12 05:22 PM
Joined: Aug 2007 Posts: 1,819 Middle of A Field O OrangeProwler top fuel
OrangeProwler top fuel O Joined: Aug 2007 Posts: 1,819 Middle of A Field	I'm going to go against the grain here and suggest that if you must stick with a 318 may I suggest finding a running 5.2 Magnum from a 92-01 Dodge truck/suv/van. I think you can use the Magnum pan for your application. Get an Air Gap Intake and set up an electric fuel. Get a 600-650 cfm carburetor and swap over your existing water pump, timing cover and valve covers if you desire. At least with this setup you'll have better heads and a roller cam. You can cam if you want to and I would suggest looking up the user "Patrick" for his posts on cam selection if you want to swap cams but, then you'll also need to swap springs/retainers in the heads. JMO.

Re: 318 build [Re: OrangeProwler] #1348027 12/09/12 08:22 PM 12/09/12 08:22 PM
Joined: May 2003 Posts: 15,487 Florida S scratchnfotraction I Live Here
scratchnfotraction I Live Here S Joined: May 2003 Posts: 15,487 Florida	Quote: I'm going to go against the grain here and suggest that if you must stick with a 318 may I suggest finding a running 5.2 Magnum from a 92-01 Dodge truck/suv/van. I think you can use the Magnum pan for your application. Get an Air Gap Intake and set up an electric fuel. Get a 600-650 cfm carburetor and swap over your existing water pump, timing cover and valve covers if you desire. At least with this setup you'll have better heads and a roller cam. You can cam if you want to and I would suggest looking up the user "Patrick" for his posts on cam selection if you want to swap cams but, then you'll also need to swap springs/retainers in the heads. JMO. I would go with a 85 or newer pre-mag roller cam 318. select some cheap stock parts on the roller gear,oil thru lifters and hollow PRs and use a nice after market roller cam. you are then one step away from a magnum head upgrade. member "Patrick" recomended the lunati 60710 voodoo roller cam with comp 901-16 springs for the 318 in my 85 stepside. it is a great daily driver cam in a truck and I am knocking back 19+ mpgs with a highway gear in it. its in my 2nd 318 now,first was a 360 headed 318 and now a #302 headed 318. worked great in both engines in the truck with a 600 cfm carb/LD4B intake/headers I have used some 360s in a couple 4x4 with 318 heads swaped on them,that gives a comp bump,torque bump, makes a nice work truck engine. carefully built it can be a torque monster.

Re: 318 build [Re: scratchnfotraction] #1348028 12/10/12 10:12 AM 12/10/12 10:12 AM
Joined: Jan 2003 Posts: 16,123 Grand Haven, MI patrick I Live Here
patrick I Live Here Joined: Jan 2003 Posts: 16,123 Grand Haven, MI	XE268 is way too big for a stock 318 in a heavy 4x4. it'll be a total dog below 3000 RPM. biggest cam I'd go would be an XE256 or lunati voodoo 60401. but I agree with others, at the very least I'd start with an 85 up 318 to get a roller cam motor with 302's, or a '92 up magnum motor. 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)

Re: 318 build [Re: dragduster71] #1348029 12/10/12 04:29 PM 12/10/12 04:29 PM
Joined: Dec 2006 Posts: 3,533 Indiana F Fury Fan master
Fury Fan master F Joined: Dec 2006 Posts: 3,533 Indiana	Quote: ive seen 318 builds with these parts at 400hp but im not gonna do any portwork,just out of the box its a truck i just want a little more power and for it to sound good, Based on all reports I've read, you won't get more than ~250-275 hp thru -302 heads. And those 400hp 318 builds you see in the magazines are somewhat fanciful. Even if they could be picked froma tree, to put such an engine in a heavy truck would be a poor idea. As mentioned, go with the 5.2 Mag instead of a -302 318. Last edited by Fury Fan; 12/10/12 04:30 PM.

Re: 318 build [Re: Fury Fan] #1348030 12/11/12 04:25 PM 12/11/12 04:25 PM
Joined: Feb 2004 Posts: 936 O OLD318 super stock
OLD318 super stock O Joined: Feb 2004 Posts: 936	Quote: Based on all reports I've read, you won't get more than ~250-275 hp thru -302 heads.... I'm quite sure your right here... If it's a stock 302 head with the stock 318 1.78 intake and 1.5 exhaust then no I see no way to get HP over ~250... 318 heads don't flow anything... Therefore they are never used on performance builds... If I recall correctly, the "High" performance 318 builds (Over 250 HP) take the 302 head and give it a 360 valve job (1.88 intake 1.6 exhaust) then the do a mild 360 port on the heads to mate with the 4bbl intake ports. Which are larger than the stock 318 ports... Now the head is flowing more,hence more HP (with the proper cam etc). If memory servers me... If you put 340/360 heads directly on a 318 you will have nothing for compression.... so to make it work you have to mill the block to get the compression back... When building a 318 for more power it becomes 1 of 2 basic options 1) use 340/360 heads but mill the block or 2) rework the 318 heads.... 340/360 valve job and port Either way your machining costs are increased... This is why folks say...forget it, just get a 360 or a 340!! and you don't have to do any of this??? Cost considerations =================== What is the machining cost of the 318 (either option) vs the 340 build or 360 build? 318 block/heads cores are cheap... 340 block/heads cores are not (360 cores are usually in between the two) NOTE: The price on all of these cores/heads are not going down BTW) If your goal is 350-400 HP The question is... with all the machining work is it worth it cost wise (cheaper) to build the 318 or just pay up for a core 340 and build it... I think the consensus on this board is... Given the HP requirement, just build the 340/360... If you personally are an engine builder and like this kind of stuff (Porting/milling etc) and you want to tinker with the 318 - Great! The rest of us have to pay up to do this.. Best of luck to you either way

Re: 318 build [Re: OLD318] #1348031 12/11/12 04:46 PM 12/11/12 04:46 PM
Joined: Jan 2003 Posts: 7,978 Bethel Ct A AdamR master
AdamR master A Joined: Jan 2003 Posts: 7,978 Bethel Ct	I would go with the XE256

Re: 318 build [Re: AdamR] #1348032 12/12/12 10:22 AM 12/12/12 10:22 AM
Joined: Aug 2007 Posts: 1,819 Middle of A Field O OrangeProwler top fuel
OrangeProwler top fuel O Joined: Aug 2007 Posts: 1,819 Middle of A Field	Quote: I would go with the XE256 Or Summit K6900 kit

Re: 318 build [Re: OrangeProwler] #1348033 12/12/12 09:57 PM 12/12/12 09:57 PM
Joined: Jan 2003 Posts: 1,643 A certified culture free zone. 74RALLYE top fuel
74RALLYE top fuel Joined: Jan 2003 Posts: 1,643 A certified culture free zone.	I built a 318 with home ported 302 heads and an RV type cam from Racer Brown for a 74 SE Charger. It was a low budget build. It's a good, strong engine that will smoke the tires with ease and it's fun to drive, but it's not going to blister the qtr. mile.

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