[Chevy21]

This may be a very dumb question, but what is the deck height on a stock motor. For example, I have a 97 350 Chevy Vortec block that came out of a pickup. The pistons are already out of the motor, so there is no way to measure. Just curious because if i wanted to compute compression i need to know chamber volume, piston volume, gasket volume, Deck Height, etc. Thanks to anyone who can help with this question.

 

[johnsongrass1]

9.0.

Most measure out to 9.025

 

[Chevy21]

No, I didnt mean compression. I meant like what is the deck height in inches. Does that make sense? .10, .20, .30? What is the optimum deck height that you want to achieve. I dont think deck height has anything to do with whether your piston is domed, dished, or flat, or your chamber volume, or any of those things right? Please, enlighten me.

 

[Cstraub]

here. . ."...put those after what Johnson posted and you will have inches.

Chris

 

[johnsongrass1]

Deck Height: The distance from centerline of crank to the face the heads bolts(deck) to. 9.0"

Compression height. The distance from top of piston crown to centerline of piston pin. 1.56"

 

[Chevy21]

OK, gotcha. Thanx. Another quick question. How do you figure for CC volume when basing it off of compressed gasket thickness. Say like .028 thickness on a Chevy 350. I read somewhere like a gasket with .041 made 9.1 CC's of volume.

 

[johnsongrass1]

That's mostly dependant on how much the gasket will compress. You can go to www.felpro.com and get all you need.

Figure the volume the same as you would figure a cyl. volume

It's just a really short cyl.

 

[arch]

Geometery.

Volume of a cylinder.

pi * radius² * height = Volume

3.14 * 4² * .028 = V
3.14 * 16 * .028 = 1.40672ci

Now, Cubic Inches to Cubic Centimeters.

1 cubic inches = 16.387064 cubic centimeters

1.40672 * 16.387064 = 23.05201067008cc
Or simply, 23cc's.

Although .028" Head gasket is kinda small.

(Did I do that right?)

 

[jimfulco]

4" is the bore diameter. Radius is half the diameter. The GM .028" gaskets have a 4.1" bore diameter, so:

3.1416 x 2.05" x 2.05" x 0.028" x 16.4cc/ci = 6.06cc