Cubic Inches

[49-blues]

Any one know formula for figuring cubic inches? My motor is a 4.1 block bored .020" to 4.020", 3.625 " crank, 6.350" rods.

 

[tbone87]

Go to wallaceracing.com and u can figure everything!! I downloaded the app pretty neat.

Posted from the TurboBuick.Com mobile app

 

[49-blues]

Thanks.

 

[ttypewhite]

You would be close to 268 cubic inch provided you have stock deck height.

 

[PSID6]

Bore x Bore x .7854 times stroke times number of cylinders

 

[49-blues]

Yes pretty much stock height. Wallace racing says about-468 cubes- something ain't right?

 

[49-blues]

16.16 x .7854 x 6.350 x 6 = 483- what's wrong?

 

[tbone87]

I got 278ci or 4.5 but I not the smartest either

Posted from the TurboBuick.Com mobile app

 

[pacecarta]

6.35 is your rod not your stroke and you asked cubes the rod length has nothing to do with it nor does deck height

your stoke is 3.625

 

[USMC_Turbo6]

276.06 ci or 4.5

Posted from the TurboBuick.Com mobile app

 

[49-blues]

Thanks- I knew I was doing something wrong. What's the correct formular?

 

[49-blues]

Got it thanks-16.16 x .7854 x 3.625 x 6 = 276 cu in

 

[rag231]

Your block is actually bored more than .020, it probably didnt start out with a 4.00 bore new.

 

[49-blues]

I got it at 4.005, it is now bored out to 4.020".

 

[rag231]

I guess it took a lot to clean the bores up.

 

[49-blues]

Whatever Bobbie at RPE thought is alright with me! There was actually some minor scratches that I couldn't even see until he brought it to my attention- you don't argue with perfection, he is the expert and I'm very happy with the outcome!

 

[rag231]

Of course, an RPE motor should exceed all of you expectations.