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-   -   carb manifold cam combo 4 318 (https://moparforums.com/forums/f7/carb-manifold-cam-combo-4-318-a-367/)

deadkelly 10-14-2007 12:55 AM

carb manifold cam combo 4 318
 
iam after budget bolt on horse power for my rebuilt stock 318 2bbl .i don't want to take off the heads or take out the 904 for a stall converter,i have twin 2 1/2 in exhaust .iam saving for a crate motor ,this is just a quick fix for about 12 months still must go as hard as possible.if hp will be down to much i will use a stally and fit valve springs and bigger cam. i also have 3.55 lsd diff center to go in.

deadkelly 10-14-2007 04:46 AM

just spoke to a mate who recos moto bike engines ,he says iam wasting my time if i don't put a bigger cam ,stall converter at least mild port job,springs, carb & manifold.

polyhead_318 10-24-2007 08:14 PM

why don't you step up to a 4bbl? or a high cfm holley 2bbl, they make 'em in 350cfm and 500cfm.

SixtySixDeuce 11-05-2007 03:28 PM

What is the engine in and what kind of emission equipment does it have? This stuff makes a huge difference. Late '70 truck 318's are not smogged down and have decent heads, so they can benefit from adding a 4 bbl and a mild cam, while the emissions crap and heads on an 82 Fifth avenue really can't make use of the extra flow.

Most 318's run flattops with 8.4 or 8.5 CR's, but the heads vary wildly. Milling them 0.030" or so (any more will require adjustable pushrods and milling the intake), porting and port matching, a small CFM (500-600) 4 barrel and a 360 truck cam will give a decent increase. This is exactly what I did with my '78 aspen (thought he heads are 593's off a '76 truck engine). Cost me about $700 total ($260 for the Edelbrock 600, $120 for the Napa cam & lifter package, $100 for the head gasket set/timing cover gasket set/timing chain, $100 to have the heads milled, and about another $100 in misc small parts. I did the porting and port matching, and I already had a police interceptor 4 bbl cast iron intake (also got ported).

66coronetgirlie 11-05-2007 09:37 PM

I have a Holley 350cfm 2bbl for a 318 :D want it? lol

deadkelly 11-07-2007 02:16 AM

might put it on my 440
 
just bought a 440 , that should do the job.:)

deadkelly 11-07-2007 02:30 AM

i just bought a 440 ,it'll ooze torque. haha thanks 4 the reply

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