Check my math
01-15-2008, 08:22 PM
#1
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Check my math
I am double checking my SCR DCR. Here is the calculator I used.
https://ls1tech.com/forums/showthrea...cr#post6886439
My set up is 2001 5.3 LM7 with TSP 228/228 .588/.588 112 with PRC Stg 2.5 Heads with 62cc chambers. Stock head gasket.
Here is what I put in,
Bore = 3.778
Stroke = 3.622
Rod Length = 6.098
Cylinders = 8
Deck Height = -.008
Piston dish = 2
Gasket thickness = 0.052
Chamber Vol. = 62
SCR = 10.23
DCR = 8.04
Would it be worth replacing the head gaskets with Cometics 0.040?
The new SCR = 10.52 DCR = 8.27
Opinions needed, thanks.
https://ls1tech.com/forums/showthrea...cr#post6886439
My set up is 2001 5.3 LM7 with TSP 228/228 .588/.588 112 with PRC Stg 2.5 Heads with 62cc chambers. Stock head gasket.
Here is what I put in,
Bore = 3.778
Stroke = 3.622
Rod Length = 6.098
Cylinders = 8
Deck Height = -.008
Piston dish = 2
Gasket thickness = 0.052
Chamber Vol. = 62
SCR = 10.23
DCR = 8.04
Would it be worth replacing the head gaskets with Cometics 0.040?
The new SCR = 10.52 DCR = 8.27
Opinions needed, thanks.
01-16-2008, 12:58 PM
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Btw, this is the DCR calculator I used. Just make sure you enter in the correct cam numbers (use .006", not .050").
http://www.empirenet.com/pkelley2/DynamicCR.html
http://www.empirenet.com/pkelley2/DynamicCR.html
01-16-2008, 05:37 PM
#5
This is the best calculator I have found, it also takes into acount the elevation that your at. Mine is 8.0 at 2900ft and 8.5 at sea level. No wonder trucks run better there.
http://www.bid2race.com/DynamicCompr...Calculator.php
http://www.bid2race.com/DynamicCompr...Calculator.php
01-17-2008, 04:02 PM
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So I guess my numbers are correct. Anyone willing to guess what a bump of 0.23 in DCR would do for me? Just trying to figure out if it is worth the time and money.
Thanks guys
Thanks guys
01-17-2008, 04:12 PM
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It appears that most gas engines make the best power with a DCR between 7.5 and 8.5 on 91 or better octane...Race engines, using high octane race gas, can tolerate higher DCR's with 8.8:1 to 9:1 a good DCR to shoot for.
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01-17-2008, 04:16 PM
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I am double checking my SCR DCR. Here is the calculator I used.
https://ls1tech.com/forums/showthrea...cr#post6886439
My set up is 2001 5.3 LM7 with TSP 228/228 .588/.588 112 with PRC Stg 2.5 Heads with 62cc chambers. Stock head gasket.
Here is what I put in,
Bore = 3.778
Stroke = 3.622
Rod Length = 6.098
Cylinders = 8
Deck Height = -.008
Piston dish = 2
Gasket thickness = 0.052
Chamber Vol. = 62
SCR = 10.23
DCR = 8.04
Would it be worth replacing the head gaskets with Cometics 0.040?
The new SCR = 10.52 DCR = 8.27
Opinions needed, thanks.
https://ls1tech.com/forums/showthrea...cr#post6886439
My set up is 2001 5.3 LM7 with TSP 228/228 .588/.588 112 with PRC Stg 2.5 Heads with 62cc chambers. Stock head gasket.
Here is what I put in,
Bore = 3.778
Stroke = 3.622
Rod Length = 6.098
Cylinders = 8
Deck Height = -.008
Piston dish = 2
Gasket thickness = 0.052
Chamber Vol. = 62
SCR = 10.23
DCR = 8.04
Would it be worth replacing the head gaskets with Cometics 0.040?
The new SCR = 10.52 DCR = 8.27
Opinions needed, thanks.
01-17-2008, 04:16 PM
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Where did you get the 2cc piston dish number? Because with 62cc chambers in those heads and stock pistons you should still be around 9.4-9.5 Static compression ratio, which would put your DCR in the mid to high 7's (just estimating).