figuring static compression
figuring static compression when figuring static compression ratio, does the distance from the top of the piston to the top ring need to be took into account? Im building a 408 and I thought I was done figuring compression until I read something about this. I used the compression calculator from the csgnetwork.com website which I've
seen its used alot by other people on here.
my specs are
CID-408
Bore-4.030
Stroke-4"
Rod Length-6.125
Head Gasket Bore-4.060
Head Gasket Thinkness-.040
Head Chamber Volume-64cc
Piston Dome Volume-wiseco -3cc flattops
Deck Clearance-0
Using the compression calculator mentioned above I get 12:1 which is what I want, but now I'm unsure.
seen its used alot by other people on here.
my specs are
CID-408
Bore-4.030
Stroke-4"
Rod Length-6.125
Head Gasket Bore-4.060
Head Gasket Thinkness-.040
Head Chamber Volume-64cc
Piston Dome Volume-wiseco -3cc flattops
Deck Clearance-0
Using the compression calculator mentioned above I get 12:1 which is what I want, but now I'm unsure.
ok, yeah I seen another calculator that asks for the dimension from top of piston to top of first ring, so I would think that would make the compression come out lower if that had to be figured in. The guy that done my machine work figured for me and came up
with the same thing. I guess most dont use that dimension, just makin sure I actually end up with the ratio I want.
with the same thing. I guess most dont use that dimension, just makin sure I actually end up with the ratio I want.
TECH Fanatic
Joined: Jun 2011
Posts: 1,343
Likes: 8
From: Katy, TX
In my calc the area above the top ring was about 2% of the clearance volume. Kinda insignificant, but if you are very detail oriented then it can be considered.
Here is the link to the calculations explained: http://www.scribd.com/doc/145057435/...RAFT-01-Jun-13
Here is the link to the calculations explained: http://www.scribd.com/doc/145057435/...RAFT-01-Jun-13
In my calc the area above the top ring was about 2% of the clearance volume. Kinda insignificant, but if you are very detail oriented then it can be considered.
Here is the link to the calculations explained: http://www.scribd.com/doc/145057435/...RAFT-01-Jun-13
Here is the link to the calculations explained: http://www.scribd.com/doc/145057435/...RAFT-01-Jun-13
TECH Fanatic
Joined: Jun 2011
Posts: 1,343
Likes: 8
From: Katy, TX
when figuring static compression ratio, does the distance from the top of the piston to the top ring need to be took into account? Im building a 408 and I thought I was done figuring compression until I read something about this. I used the compression calculator from the csgnetwork.com website which I've
seen its used alot by other people on here.
my specs are
CID-408
Bore-4.030
Stroke-4"
Rod Length-6.125
Head Gasket Bore-4.060
Head Gasket Thinkness-.040
Head Chamber Volume-64cc
Piston Dome Volume-wiseco -3cc flattops
Deck Clearance-0
Using the compression calculator mentioned above I get 12:1 which is what I want, but now I'm unsure.
seen its used alot by other people on here.
my specs are
CID-408
Bore-4.030
Stroke-4"
Rod Length-6.125
Head Gasket Bore-4.060
Head Gasket Thinkness-.040
Head Chamber Volume-64cc
Piston Dome Volume-wiseco -3cc flattops
Deck Clearance-0
Using the compression calculator mentioned above I get 12:1 which is what I want, but now I'm unsure.
Top Ring Land thickness (T_RL) 0.295"
Top Ring Land diameter (D_RL) 3.971"
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