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Discussion Starter · #1 ·
a guy asked me yesterday if my 383 was a stroker.what does this mean and how would i know if mine is a 383 stroker?are there any benifits or no?
 

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stroker motor add cubic inches to smaller motors for instance your 383 stroker is probably a 350 block with a 3.75 stroke with a 6 inch rod the stroker comes from putting a larger stroked crank in the motor creating more cubes.

That should be right? I'm sure you could get a better answer from someone else…
 

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It means that you substitute a crank with a longer throw for the stock crank. Example, putting a SB400 crank in a SB350 will give you 383ci. The engine's CID is in part a function of both the cylinder diameter and the throw of the crank. You are increasing the stroke while the cylinder diameter stays the same. Generally this will give you more torque and perhaps limit how fast the engine will rev.
You can also de-stroke an engine. Ex. put a 282 or 327 crank in a 350 block. This gives you less cubic inches, but makes the engine more rev happy. Anything I missed guys?
 

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dumb, (wish you guys would use your names)
A "stroker" is a motor which has been modified to increase the stroke. A chevy 383 is a 350 with a longer stroke. However there are 383's that are not stokers, such as the Chrysler 383's.
Hope this helps,

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1971 Heavy Chevy - original owner
Team Chevelle #100
 

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A stroker motor refers to a motor that has a longer stroke than it was built with...

This can be accomplished by swapping a new crank with longer stroke, offset grinding a used crank for longer stroke or using a longer stroke crankshaft from another engine.

The stroke is how much travel the piston makes from the bottom of its stroke (down in the cylinder) to the top (TDC-Top Dead Center), and therefore volume of the cylinder is increased without increasing the cylinder diameter.

At the same compression ratio, you have the smae effect on compressing the fuel mixture, but the overall size is increased, theoretally increasing power. Longer strokes usually equate to more torque (all else being equal), and torque is what a street car really needs...


Iguess I type slow...

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Tony
1966 SS L78 coupe
1966 SS convertible
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1 wife that has drawn the line...

[This message has been edited by 1966_L78 (edited 08-10-2001).]
 

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Discussion Starter · #6 ·
so is it better to bore or stroke?which one would equal more horsepower a bored 383 or a stroked 383.if i got this right you guys are saying a stroker is achieved by increasing the stroke and not the bore.?
 

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<BLOCKQUOTE>quote:</font><HR>Originally posted by dumbguy:
if i got this right you guys are saying a stroker is achieved by increasing the stroke and not the bore.?<HR></BLOCKQUOTE>

Its hard to take you seriously with that username


You are correct.

Increasing stroke has a greater effect on cubic inches altogether, since typically the strokes avaialable have a greater variances than the overbores available.

So in theory, if you were to bore and stroke a motor, the increase in stroke would more than likely be more responsible for the larger portion of the gain in power.
 

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Also realize that your 383 is probably bored .030 over already, so it is bored AND stroked. The problem with making the cylinder's diameter bigger (bore), is that using the same block, you can only go maybe .060 over stock, which doesn't equate to a lot of extra cubic inches (ci). The other option is to use a block with a bigger bore.

On the other hand, if you stroke the motor, you can add a large amount of ci. With your 383 (which used to be a 350), they bored it .030 inches larger (from a 4" bore to a 4.030" bore) so the diameter is a bit more, making it a 355. By replacing the stock crank (3.48" stroke) with a 400 crank (3.75" stroke), the piston now travels an extra .25" each time.

Hope I didn't confuse you anymore, if you have any more questions feel free to e-mail me.


[This message has been edited by 68Sedan (edited 08-10-2001).]
 

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Any one smart enough to come in here lookin for answers is not stupid,,,,get a new name and become a regular..we welcome new members no matter wat there level of knowledge is,,long as they are Chevelle heads,,hel;l even just Chevrolet heads we dont care,,

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if you were to say, stroke and bore a 502 BB you'd get the most low end torque possible starting with a standard bore block. correct? is it even possible to bore+stroke a 502?
 
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