The debate is basically stroke vs bore, I think 408 4.03" x 4.00" vs 408 4.14" x 3.79" might been better example, Since they could use same top end parts.
SB vs BB who wins?
- Thread starter Mean416
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Dale Davies
Well-Known Member
33IMP
Well-Known Member
Agree. I like to compare a 318 to a 327 chevy. There were two barrel, low compression 327s, usually in a full size impala with no gear, and a powerglide. They couldn't pull a fat girl off a tricycle.
The 318 is very similar to that 327, a low-po workhorse, with no pretense of performance, so no reputation, except as a workhorse.
The difference is, of course that there were very-much thoroghbred versions of the 327. Solid cams, big holleys or fuel injection, 11 to 1, good manifolds, and rated well above one horse per cube. 350 chevies built there reputation on the foundation of the 327. A 318, never got any factory performance parts, so no reputation. The 318 Mopar owner has to add his own performance parts, and build his own reputation.
100%, to me the only reasons not build a 318 is if rpms/gear/stall is too much for you for hp/performance level you want. Not just for the 318 that basically goes for any engine.
33IMP
Well-Known Member
I believe a 5.3 LS head will outflow a 440 906 head. A 318 is a GREAT set of heads (and more) away.
But who is gonna put trick flows on a 318?
Black Friday speedmasters? You betcha!
and capable of running 7.50's at a buck eighty @2900 #'s.
Boy this post went from 7000.00 engines to 50,000.00 plus engines. What the heck did I miss.
I like to use the 655 to end the argument, if there ever really was an argument.
It's no argument, you build some fast small blocks on a not so big budget.
Here’s one for the big block guys. I’m Facebook friends with Al and he a moderator on Moparts so I doubt he’s a member here. Lots of B1, Indy, and Preditor builds. I love this truck. So I don’t have more info for you guys.
Newbomb Turk
Well-Known Member
The biggest issue with the 318 is piston availabilty. Of course, at this point if you want something other than 30 year old pistons you have to order them custom anyway. Unless you like 5/64 or 1/16 ring packages. I don’t.
Newbomb Turk
Well-Known Member
My buddy put SM’s on his 318. Couldn’t get him to front for at least one day on the dyno so I have no clue what it makes for power.
Sadly, I made it run last July or august. He hasn’t driven it yet because he can’t get all the brake leaks stopped. I’m not fixing that for him.
Dale Davies
Well-Known Member
These days 5/64 rings are definately not what we want. Might be able to find 1/16 rings pistons. Going to 0.043", 1.2mm.or 1.0mm for a 318 would definately be custom, which would be a cost step up.
On a cost basis, the 1/16 rings would be acceptable in my mind. Only reason to use 5/64 rings is if you are reusing the pistons.
I didn't bother to read 5 pages of fighting and bickering about which is better or why, but I'll offer this. In a normally aspirated engine the one with the biggest bore
has the highest potential horsepower output.
Tom
has the highest potential horsepower output.
Tom
This car has a basically stock 440 with a small flat tappet cam, aluminum intake, absolutely nothing fancy, and it will run 9.90 in the 1/4.
Tom
Newbomb Turk
Well-Known Member
That engine will probably last forever.
So it’s an 11 second high 10 second engine in a semi light big block duster.
Yeah that's a slow car. If it's not in the 9s it ain't crap
Yeah that's a slow car. If it's not in the 9s it ain't crap
Did I say that. I said it’s a low 11 or high 10 second engine in anything but a super light (2100) pounds.
which is actually a pretty decent pass if it's very basic 440 with a eddy on top
which is actually a pretty decent pass if it's very basic 440 with a eddy on top
This car has a basically stock 440 with a small flat tappet cam, aluminum intake, absolutely nothing fancy, and it will run 9.90 in the 1/4
Solid lifter cam, aluminum intake, who knows what else.
Al's over at B-bodies with his Savoy, he's doing a once over it working out some things.
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