Dynamic compression
Thread Starter
Staging Lane
Joined: Apr 2015
Posts: 94
Likes: 1
Dynamic compression hello everyone the number I input to Wallace just seemed a little high so just seeing if anyone can help me with them to correct my error
Wallace results
11.1:1
effective strike 3.21
dynamic 9.95:1
347
wiseco +4 3.903 dome pistons
gen 4 rods
3.910 .51 head gasket
232/234 112lsa 110icl
ivc 46
stock 243 heads surfaced twice since I’ve had them so I say there at 63cc
location: Las Vegas I guess target da is 2000ft
Wallace results
11.1:1
effective strike 3.21
dynamic 9.95:1
347
wiseco +4 3.903 dome pistons
gen 4 rods
3.910 .51 head gasket
232/234 112lsa 110icl
ivc 46
stock 243 heads surfaced twice since I’ve had them so I say there at 63cc
location: Las Vegas I guess target da is 2000ft
You use the 006 lift number IVC for dynamic compression valve not the 050 lift. Add 26 degrees to your 46, and you get 72. Use that value. Unless you can find 006 IVC on your cam card.
Thread Starter
Staging Lane
Joined: Apr 2015
Posts: 94
Likes: 1
Most cams have a ramp rate between 49 and 54 degrees. Thats the difference in duration from 006 to 050 lift. Assuming a symmetric lobe, you would add between 25 and 27 degrees to each side of your 050 lift. 26 is just right in the middle and gets you within 0.1 on your dcr calcs
Thread Starter
Staging Lane
Joined: Apr 2015
Posts: 94
Likes: 1
Most cams have a ramp rate between 49 and 54 degrees. Thats the difference in duration from 006 to 050 lift. Assuming a symmetric lobe, you would add between 25 and 27 degrees to each side of your 050 lift. 26 is just right in the middle and gets you within 0.1 on your dcr calcs
Thread Starter
Staging Lane
Joined: Apr 2015
Posts: 94
Likes: 1
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unless you mill for increased compression, I would run with a 228/232-111+3. At 11:1 compression, you'll get better response with an earlier IVC. if you're dead set on that cam, get compression up over 11.5 and closer to 11.8
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