Ok guys new Question. I have a perfectly good 318 I just pulled from my truck and I am determined to make it big to go into something else. I wana rebuild it I have read a few things to make this a BAD engine but need more ideas and articles and any advise I can get. I heard you can get 500+ H/Power out of it. What do you guys think?
I think trying to get 500 RELIABLE horses from a 318 may be asking a bit much. Sure, you can do it, it won't be cheap, and how long will it last?
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I also would be interested in anything that you com up with as I am going to rebuild a 318 too but I am only trying to get 375 to 400 HP out of it.
500 raw horsepower from a 318 might be possible by stroking it to a 402 and using a forged crank, pistons, just to feel safe about it holding together , plus Edelbrock heads, a hydraulic roller cam, etc. In other words, you are going to spend big bucks , which I am sure you dont want to do since youre building a 318 and not a 440. You can make around 350 - 370 hp out of it though and thats enough to make an A-body run 12s, and if its to be a street driven car, you really dont need more than that, its only going to get you into trouble. The cheapest way to go is to skip the Edelbrock heads, and find some good cast iron 360 heads. The heads I am using on my 318 build are 360 "J" heads, identified by the large J cast next to the second spark plug hole. I am using forged pistons which , in combination with head gasket thickness , deck height, chamber size and other varieables is giving me a final CR of around 9.5:1. I am using a flat tappet hydraulic cam, of 292 advertised duration, and an edelbrock dual plane manifold, because it will be a street car. I am running the TTI A body headers, and an MSD disributor. A friends Duster with a simular combo has reliably run 12s, so it should do the same for my Dart. As I said, thats all I could ever forsee needing on the street. But if you really need to get close to 500 hp, maybe the best way is to build the engine Ive described an plumb a 100 hp shot into it. That should put you in or near the 10s in a 3100 lb A body. Ive built my engine for just this kind of thing, in case I should become sick and twisted enough to want to do it. Just remember, the early 318s were steel crank motors, a '70 motor would be a safe bet. You definately want the steel crank.
Only the 67 LA 318's had steel cranks, all the rest had cast. But all 273's had steel cranks and 340's upto 73 had them.I made a 500hp 318 for the Mopar Muscle engine challenge for 2007, MRL Pefrformance 318. It made 498hp on the dyno at the machine shop I had the block work done and 503hp at a friend of mines dyno, not 3-4 weeks after the challenge. I changed nothing from the challenge, other than using the right loctight on the rocker studs(my mistake). But it only squeaked out 380hp@7000rpm on Comp Cams dyno for the challenge. Must have been the Air down thier or something. This engine is now in a Dart that runs 11.6 in the 1/4 mile. A little hard to do with 380hp, dont you think? ALL MOTOR! SO it can be done.
can you give us some detail on what you used in the build?
poly locks on adjustable rockers work best
yeah , as around 430 hp at the rear wheels is what it would take not knowing your cars weight but close.
sounds like 500hp on a dyno to me
well 67 ,seeing you said you made 500 on your last 318 tell tim what the combo was so he can build his own
318 500 hp is easy wont be very streetable but its easy pm me for info you need
no nos required
buy a M.P engine manual, you can build a 500hp 318 .they list everything required ,thats actually a 10 second build at 28oo lbs
LAST YEAR FOR STEEL CRANK IN 273 WAS 1967! I'VE ONLY [HEARD] OF A STEEL CRANK IN A 67' TRUCK 318.318 ARE CAST CRANK!340'S ARE CAST CRANK IN 1973!
age is no lock on brillance
not all, the 4 speed cars in 73 got the steel crank also