318 factory cams

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All 318 are in the 240 range with no more than .400" lift any performance cam is a major upgrade for a 318.
 
Which 318? The Mexican 318's had the intake/heads/cam from the 340 and were rated 270hp.

The regular 318 in the Usa didn't have a 340 cam or anything close. It was something like 373/399 lift. Tiny and crappy...almost anything is better.
 
i hear ya....i was trying to find info for 318 police engines, like whats in my 66. i pulled it from an 87 gran fury highway patrol car, it was a vin "M", i tore down and inspected the thing, it has a 360 top end, 360 sized valves and ports, non-roller cam, pretty simple. all i could find on these things is they used hypeurectic pistons with a .020 raised piston pin height to deal with compression, rated at around 8.5:1. this thing just seems much much more snappy and torquier than my 74 318 that was a standard 210 horse truck mill....eventually id like to do a cam/valve spring/head port job....
 
hi, ok I looked up cam specs, both 4 bbl 318's used same cam, .390 int, .420 exh. difference was in cylinder heads. one had 360 heads with 1.88 & 1.60 valves, other had 1.78 & 1.50 valves which is a 318 head. both used same intake and T.Q. carbs. these specs are from NHRA , and from mopar.just food for thought. I also found same specs in my mopar race manual.
 
The 340 cam has a advertised duration much greater in size than the standard cams used in all other regular engines. The duration @ .050 is pretty tame. If you want to use a purple cam, the. The upgraded 340 cam with similar specs to the OE cam is a good cam to use. The duration specs @ .050 are much larger a d will wake up the engine.
 
perfacar said:
hi, ok I looked up cam specs, both 4 bbl 318's used same cam, .390 int, .420 exh. difference was in cylinder heads. one had 360 heads with 1.88 & 1.60 valves, other had 1.78 & 1.50 valves which is a 318 head. both used same intake and T.Q. carbs. these specs are from NHRA , and from mopar.just food for thought. I also found same specs in my mopar race manual.
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I'd like to get those links if possible.

I've been trying to find factory specs for the roller LA motors and the Magnum motors to compare them to the earlier 318/360s.

..also the diference between the 150 and 170 HP versions listed in most service manuals.

Let's just say what I've found is somewhat unclear.
 
anyone ever run a 340 auto cam in an otherwise stock 318? with a 2bl or 4 bl
 
It is a popular upgrade done millions of times.
 
kursplat said:
anyone ever run a 340 auto cam in an otherwise stock 318? with a 2bl or 4 bl
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Yup, I did it. With Rhoades lifters, 10.5:1 compression pistons, 68 340 intake, and Holley 600 vac secondary cam. Daily driver in 68 Barracuda fastback. Ran great and got 17.75 MPG on highway with 2.76 gears. I had to upgrade the heads from stock to 77 360 heads due to too much compression. When I changed heads, I went from 24" of Hg at idle to 22.5" of Hg at idle.
 
yea hopefully sometime next summer. i have a suspention swap to finish first. i was leaning towards a 340 cam mainly because im not racing this thing, its my summertime daily driver. I may get a little stupid on the weekends but thats pretty much it.
 
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