396 LSx motor??
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Engine displacement=8(pi)*((Bore^2)/4)*stroke.....Thus leaving me with a 4.00" stroke and a 3.9694" piston bore. This project is souly ment for nostalgia purposes....but I needed some imput as far as proper stroke to piston size. What was the original...and what forged parts are available.
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Mine is a 3.905 bore and 4.125 stroke. Most people don't like this set up because of the extended stroke (unsquare).
I agree with Z28mcCrory in saying that I would stay with the stock stroke and either get an LS2 (or resleeved LS1) and bore it out to its appropriate bore.
I agree with Z28mcCrory in saying that I would stay with the stock stroke and either get an LS2 (or resleeved LS1) and bore it out to its appropriate bore.
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Mine is a 3.905 bore and 4.125 stroke. Most people don't like this set up because of the extended stroke (unsquare).
I agree with Z28mcCrory in saying that I would stay with the stock stroke and either get an LS2 (or resleeved LS1) and bore it out to its appropriate bore.
I agree with Z28mcCrory in saying that I would stay with the stock stroke and either get an LS2 (or resleeved LS1) and bore it out to its appropriate bore.
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Oversquare would be when your bore is larger than your stroke.
i.e. LS1 3.62" stroke with a 3.90" bore, or you can determine if you divide the 2 numbers bore over stroke. You must have result larger than 1 to be over
square. 3.90/3.62 = 1.07
Undersquare would be when your bore is smaller than your stroke.
i.e 396 stroked LS1 with a 3.97" bore and a 4" stroke.
3.97/4.00=0.99 Result is smaller than 1 therefore undersquare.
Arthur
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There really is no power advantage to either design. Where they differ is in how that power is produced. Usually, a 'stroker' (undersquare) makes it's maximum hp/torque #'s at a lower rpm. An oversquare motor of equal displacement can produce the same power, but would require much higher rpm to reach the power band.
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So basically your talking about stoke vs bore....the small the stroke the higher the RPM you can turn due to the decrease piston speed...meaning higher power band, verses a bigger stroker motor.
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The closest I think youre gonna get is to use a 5.3 litre block and use a ls1 3.960 piston (which scoggins sells) and a 4 inch bore crank with a 6.125 rod...that make like a 394ci. Or you can go stock bore 6.0 iron block with the same crank and rods as above...thats a 402...But honestly if your gonna spend the money to put a motor in a car i would do something thats gonna make some big power. like an iron block 414 or something...Utilize the new 4.125 and 4.200 cranks in the 6.0 iron block with a common piston like a 4.030