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#2
10-05-2006, 02:35 AM
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my friend put a 284/484 into his 340 swinger clone, and it is a very nice street cam, about as much as you would want to go on the street though...
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#3
10-05-2006, 05:47 AM
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Mopar Performance 260/268 cam, or the one step smaller, or 340 resto cam. 284/.484 is way too much for a low cr 318 with stock drivetrain, it will have no low end torque. 318 doesn't like a lot of cam, unless you use low gear ratios and high stall converters.
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#5
10-05-2006, 08:26 PM
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Could use a little more info.
Rear gears, tire size, cars weight, stock converter? will you change it later? Type of intake, carb size. Engine otherwise stock?
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#6
10-05-2006, 08:54 PM
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Mine is a ISKY 268/276 in my truck, 480/480 lift, with a 110 lobe center. Sounds great, and pulls 10,000 pounds right from the get go, with the stock TC.
(Cam is hotter than a 340 cam) Don't do like I did though, keep lift under 450, without some guide mods, or you will beat the crap right out of your seals. I guess I can post another clip of what it sounds like now, with headers and aerochambers.... 340 cam doesn't lope at all, in a 318, a slight skip ever few seconds, not really the "sound" you may be looking for.
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#7
10-06-2006, 10:09 AM
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Quote:
hi .. I got the same thing here, only it`s volare with a 360 cid and a 727 trans and im using a 2000 rpm stall converter.... I`m gonna change cam, intake and carb, could someone help me with what i should buy?? i also got 2 magnum heads, shold i use them on the 360, and if, what about the intake holes?? and what cam fits the magnum heads??? im also going to change gear drive in the rearaxle, im thinking around 3:90 ?? does that sound resonable?? thanks 
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#9
10-06-2006, 12:22 PM
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As far as a cam change a set of 360 heads would also help performance I spent nearly 700 dollars rebuilding and porting my 71 318 heads and still ended up going to 360 heads The runners are giant compared to the 318 The added flow will really help the cam work Unless its a resto I,d consider a cam and head package and smoke some 302s and 350s
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#10
10-06-2006, 02:14 PM
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ehh I smok`em enyways.. hahaha but yeah, magnum sounds nice in my ear, so combined with a good cam,intake and a nice carb hell I`ll even smoke some 455s no problem,, huh I`m on thin ice now....
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#11
10-06-2006, 04:41 PM
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vredesbyrd, your hi-jacking a thread, but it's about the same idea.
Whats the goal of the engine/car in it's performance? The best intake current is the RPM for mild to just shy of wild performance. This will handle most all dutys you seek. The carb can range from 600 to 750. Holley/Demon or Carter, your choice. The cam chossen should suite your performance goal. Is it a cruiser, street strip car? The cam should also work with the heads and exhaust. So... Are your heads stock and whats the valve sizes and do you have headers with what exhaust pipe size? Are you up for a new converter? Whats the tire size? The cars weight?
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#13
10-06-2006, 09:14 PM
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engine builders have said 360 heads on a 318 gains you nothing. You take a 8.5 (at best) compression ratio and drop it in to the 7s. If u want to raise the c.r go 273 heads to the 318
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#14
10-07-2006, 12:55 AM
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The best approach is to leave it alone, The intake, heads and exhaust ports must match to prevent obstructions in air flow, which would create turbelence of varying degrees at different throttle positions. A lopey cam would operate best in the 3000+ RPM range with very lazy bottom end. If you want 340\360 parts on a 318 look for big bucks for little gain, unless the heads are milled on both sides to raise compression, this creates inteference with the push rods, so adjustable push rods would be needed, the performance level would still be low so a bigger carb would be the next step, and the beat goes on. Loud pipes\mufflers could get you a citation some communities are enforcing the 95 DB level so be careful. If you have a nice car tune it up, some nice wheels and tires, upgrade the brakes, a nice sound system and enjoy the ride.
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#15
10-07-2006, 06:06 PM
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When you want to go fast, as in making your 318 a town meanace, 360 head are what you will be looking for. Of course, pistin replacement is part of the deal in that. Otherwise, I stand behind a 318 head.
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#16
10-07-2006, 07:37 PM
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I'm using the mopar purple cam 268/272 .450/.455 cam in my 318 w/360 heads. It has a fairly choppy idle but it's not too radical. Nice little street cam. Just make sure you have the correct gears. I'm still on my 2.76 geared rear and it takes a bit before the engine gets into it's powerband. I think it'd be a great cam with some 3.55's out back.
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#17
10-07-2006, 08:10 PM
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Quote:
It doesn't take much to get a 318 to lope, either.
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#18
10-08-2006, 02:27 AM
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A lopey cam is due to the narrow centerline and (A lot of) overlap. More over lap and numericaly lower centerline, the choppier it will be. These 2 items bleed off cyl. pressure. Enuff of one of them is bad nevermind both at the same time. The results can be what he described. LAzy bottom end. But more so by compare of a similar speced duration and lift cam ground differently.
112 + centerline and little overlap.
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#19
10-13-2006, 03:59 AM
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Quote:
If it helps, this is a 4 spd car w/ 3.23 SG gears. I went from 273 Heads (57cc), 273 cast single plane intake, stock exhaust manifolds, a small carter 4 bbl carb, and a unknown mech cam that was a little over stock. to Magnum heads, MP761 cam (228/231@.050 .480/.485 lift), MP M1 intake, Holley 600 cfm carb, Heddman tight tube headers. It's fun to drive.
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