The "Throw Away 318"
I truly love the way those 318 spin compared to a longer stroked motor.
Not to pick on you Bret;
KB107s are like 502 grams. My cast crank equipped 367 has, since 1999, has made hundreds and hundreds maybe thousands of runs to 7000/7200, in a streeter with a manual trans.
And
it has over 100,000 miles on it today.
And
I could, and have,told you guys that on one certain day-trip, to the 2004 CarCraft Nationals, it pulled over 30mpgs(USg) from point to point.
318 lovers keep painting 360s as evil,gas-sucking, slo-reving,useless piles of iron junk; but it just ain't so. Don't blame a slo-azz cammed, low-compression, 360 for what the 727 chains it to.
BTW; the 340 had forged slugs that weighed in at 745 grams IIRC, and I don't recall hearing anybody ever talk about how slow-revving their first-gen 340 was. Well, the factory cam wasn't good for much over 5500 anyway, and the factory springs barely made it that far..... Oh but don't diss the mighty 340! somebody will want to kick yerazz.
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Consider this;
>The factory 318s had about 135 psi of CCP on a good day. That translates to a possible
1621 pounds of force to the rod. By the time that gets to the flywheel it might be 224 ftlbs with the crank at 90* to the rod.
>And the lowly 360, might pump 145psi, and so the force translates to
1822 pounds and to the flywheel; wait for it, 272 ftlbs ............... which, you guessed it is about 21% stronger than the 318.
>The factory 10.5 340 pumped about 175 psi,which maths to
2243 pounds of force, and to the flywheel might be 310 ftlbs.
All these are math numbers only
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Buttum pump the CCP of the 360, to 185 with alloy heads, and watch the force go to
2325, and at the flywheel to
347 ftlbs.
But I can hear the 318-lovers screaming unfair! unfair!
Ok so lemmee say this; the 360 falls together with 63cc alloy heads, and KB107s; at right around 10.7 with no milling of any kind. So you just slap it together about as cheap an engine as you can build.
Ok so on the same budget, how high can you get the pressure in your 318. Your total chamber volume will come in around 82cc with the FellPro .039s, and 57cc heads. That makes about a 9/1 engine.
Ok so you get the bright idea to install the 340 cam, and instantly the pressure falls to 140psi, the force to
1681, yipee! and to the flywheel; 232ftlbs.
Unfair! Unfair! Yeah but that's what you guys brag on.
Ok so for the small % of you 318guys that might realize that mistake, you put a solid cam in there and pump the pressure to
185psi about the maximum you can run on pumpgas with closed chamber alloy heads. Great idea. So now, the force comes to 2221, and at the flywheel....
307; good job! congratulations you just unseated the "king". So,
>2221/307 is about as good as it gets for a 318....
Speaking of which; the king-340 is already at 175psi so has almost nowhere to go. So the
>2243/310 is already almost maxed out.
And the lowly 360, at
>2325/347 is also nearly maxed out.
But you say, how is it that the 360 has so much more to the flywheel? Well because of it's 3.58 stroke, versus the 3.315 of the junior engines.
Now, to finish the exercise; what will you have to do to the 318 to make 185psi?
Answer; everything will have to be machined. It will cost you a fortune, versus the 360 with 63ccheads and KB107s just falls together there.
