318 Stroker

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273 said:
I get building a stock stroke 318 but when stroking it's worth digging up a 360 block, your giving up 18 cid and breathing ability which is already a problem when building a big inch small block.
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Some of us just have a soft spot for the 318.....grew up with them...
I'm very happy and proud to be a teener. ....I would love to stroke mine someday

Jeff
 
Here it comes again; all for .030 overbore, except I goofed on the baby sister

Family.........bores.....strokes > 3.31.........3.58.........3.79.........4.00.........4.125
273..............3.625..............273.29......295.58......312.92......330.26......340.58
318..............3.94................322.82......349.16......369.64......390.12......402.31
360..............4.03................xxxxx.......365.3........386.75......408.18......420.93
340..............4.07................344.5........372.61......394.47......416.32......429.33
 
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65 Dartman said:
My question was purely rhetorical, but since I have a teener that would need to be overbored . . . . . I was just wondering. I agree a
360 block would be best but are non-existent in my neck of the woods. I found out after the fact that a friend of mine took a workable 360 block (as well as a couple of 400s and 1 440 to the scrapper - he needed basically gas money!
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I've done the 4" stroke on my 318 with an over bore of fourth thousands I think it works out to a 392. I put rhs heads on it 4 speed an 410 gears with a small supercharger an decent sized cam an when I wear this one out I'll do another.
 
AJ/FormS said:
Here it comes again

Family.........bores.....strokes > 3.31.........3.58.........3.79.........4.00.........4.125
273..............3.625..............273.29......295.58......312.92......330.26......340.58
318..............3.94................322.82......349.16......369.64......390.12......402.31
360..............4.03................xxxxx.......365.3........386.75......408.18......420.93
340..............4.07................344.5........372.61......394.47......416.32......429.33
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Awesome. ...thank you.

Jeff
 
MrJLR said:
Some of us just have a soft spot for the 318.....grew up with them...
I'm very happy and proud to be a teener. ....I would love to stroke mine someday

Jeff
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I'm one of the people who stand up for people who want to do 318 but once you stroke it it's not a 318 anymore.

Your building a $5000- $8000 adding a couple hundred for a 360 block shouldn't be a deal breaker.
 
273 said:
I'm one of the people who stand up for people who want to do 318 but once you stroke it it's not a 318 anymore.

Your building a $5000- $8000 adding a couple hundred for a 360 block shouldn't be a deal breaker.
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Lol...true...and in reality my 318 is bored .020" over so it's really like a 321?

Jeff
 
MrJLR said:
Lol...true...and in reality my 318 is bored .020" over so it's really like a 321?

Jeff
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Maybe if your bore it out to 4.04 you'd have to stop calling it a 318 lol
 
I don't think your going to find a 318 to be bored out to a 4.04 LOL!

3.31 X 3.91 = 318
Stock
3.31 X 3.94 = 322.85 (.030)
Easy overbore
3.31 X 3.97 = 327.79 (.060)
Possible overbore, probably not advisable.
3.31 X 4.00 = 332.76 (.090)
Extremely doubtful overbore
Sonic check before any work is done.
 
Well a couple of years ago I was hell-bent on stroking my 318, but alas the cost was actually more expensive because of my small selection for Pistons that were more expensive. I went the cheaper route and bought a 360 block from my machine shop for a hundred and fifty bucks. And was still cheaper then getting 318 stroker Pistons and by far cubic inches ahead.
 
Don't knock the 3.91 x 3.58 combination
3.90 bore x 3.66 stroke has been base engine for the Corvette for a long time.
..built carefully should be perfect hp / torque balance for an A body and be very
fast and efficient everywhere,especially on the street!
 
So what I hear you saying is we ought to build our motors like Corvettes so we have better Motors? LOL
ir3333 said:
Don't knock the 3.91 x 3.58 combination
3.90 bore x 3.66 stroke has been base engine for the Corvette for a long time.
..built carefully should be perfect hp / torque balance for an A body and be very
fast and efficient everywhere,especially on the street!
Click to expand...
 
ir3333 said:
i stand corrected.
3.91 bore x 3.58 stroke is a poor combination
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5.7L Hemi engine. It come with a bore of 3.92 and a stroke of 3.58.....347 cubic inches...

funny mopar did not go with a 3.31 stroke...
 
70aarcuda said:
5.7L Hemi engine. It come with a bore of 3.92 and a stroke of 3.58.....347 cubic inches....
Click to expand...
And did anyone take note of these few fun facts?
Poor man stroker?
Other modern HEMI bore and stroke combo's?
Anybody remember the 360 (3.58) stroke crank into a 340 block @ .030?
373 cubes, (372.61) like another engine we know.....????
 
Everybody used to poke me for not building up a 340, cuz you know; the 340 got the rep-- 360 got the rap.
So now I call my 367 a stroked 340, and suddenly it's oohs and ahhhs. Hey it's only stretching the truth a little;it does have a 4.04 bore. And it is Orange, top to bottom.It has 340 rods and a rebalanced340 flywheel.And a 340 timing chain, and all the covers were once on a 340.
But at hammer-time it's all 367
 
That is 100% true!
I knew a guy a good 25 years ago that said and did just that exact thing. Everybody ooohhh & ahhhhhed all over the place with a congrats and talk of how fast it is and what a wonderful job he did and how nice it was.

But I'm the fool for spending WAYYYY much more money (false!) on a turd 360!
Also false. I was faster for cheaper.

But all the kudos he got.
 
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