Cam question. Whats the difference? 228/232 .540/.550 VS. 220/224 .580/.590
08-24-2006, 09:24 PM
#1
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Cam question. Whats the difference? 228/232 .540/.550 VS. 220/224 .580/.590 I was just thinking about cams. My question is this:
If you have 2 cams, lets say:
1) 220/224 .580/.590
2) 228/232 .540/.550
Number one has lest duration but more lift than number 2. Number 2 has longer duration but less lift.
What will be the performance difference between the 2 cams?
To me it would be the same because yea, number 1 cam the valve will be open for a shorter amout of time, but it will have more lift letting in/out more air and vice versa for cam number 2. Number 2 wont be open quite as far, but it will be open longer to accomidate that in which will let in/out as much air as cam number 1.
If anyone has some input that would be cool. Im not in the market looking for a new cam, just sitting at work and got to thinking
...tryin to get edumacated haha 
If you have 2 cams, lets say:
1) 220/224 .580/.590
2) 228/232 .540/.550
Number one has lest duration but more lift than number 2. Number 2 has longer duration but less lift.
What will be the performance difference between the 2 cams?
To me it would be the same because yea, number 1 cam the valve will be open for a shorter amout of time, but it will have more lift letting in/out more air and vice versa for cam number 2. Number 2 wont be open quite as far, but it will be open longer to accomidate that in which will let in/out as much air as cam number 1.
If anyone has some input that would be cool. Im not in the market looking for a new cam, just sitting at work and got to thinking
...tryin to get edumacated haha 
08-25-2006, 01:18 AM
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For the most part you hit the nail on the head. The camshaft has not changed much in as long as its been around. No matter what twist you put on it....it still opens and closes the valves. Some a little faster than others...but still the same.
08-25-2006, 04:15 PM
#3
number 1 will make more torque and low to mid power, and number 2 would probably be a good all around cam, anywhere from low to high rpms, . . the point you are trying to make doesn't fit with these cams, . . the second cam has 8 more degrees of duration on both intake and exhaust and to think that the first cam's .040/.040 more lift would even it out is insane, . . . something that would even it out MAY BE the first cam with a 226/230 .650/.650, . . those two would make about the same power, . . . but those two cams listed are a pretty big jump with little lift difference
08-25-2006, 04:18 PM
#5
You can't answer this question without knowing LSA and installed intake centerline. The cam with the best valve events will win.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
08-25-2006, 05:34 PM
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Just for the point of conversation lets say both cams have the same LSA at 112 and all other variables not listed are the same on both cams, only the duration and lift change and thats IT.
08-25-2006, 06:52 PM
#7
You have to know intake centerline to make this a valid comparison. If the both are advanced 4 degrees, both ground straight up or both ground with 4 degrees of retard, you'll get 3 different answers. In some cases, the smaller duration cam will be better. Again, it's all about running the correct valve events.
Whichever cam gives you the best intake valve closing point and dynamic compression will make the most power.
Whichever cam gives you the best intake valve closing point and dynamic compression will make the most power.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
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08-25-2006, 07:46 PM
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Originally Posted by Patrick G
You can't answer this question without knowing LSA and installed intake centerline. The cam with the best valve events will win.
08-25-2006, 08:36 PM
#9
This assumes both cams are +4
220/224 .580/.590 112 +4
Intake valve closing point of 38 degrees ABDC at .050" means it will have a power peak of 5900 rpm.
228/232 .540/.550 112 +4
Intake valve closing point of 42 degrees ABDC at .050" means it will have a power peak of 6100-6200 rpm. This cam, even though it has less lift, it will make 10-15 more rwhp than the 220/224 cam.
If both cams were -4, then the 220/224 cam would make much more average hp and torque.
220/224 .580/.590 112 +4
Intake valve closing point of 38 degrees ABDC at .050" means it will have a power peak of 5900 rpm.
228/232 .540/.550 112 +4
Intake valve closing point of 42 degrees ABDC at .050" means it will have a power peak of 6100-6200 rpm. This cam, even though it has less lift, it will make 10-15 more rwhp than the 220/224 cam.
If both cams were -4, then the 220/224 cam would make much more average hp and torque.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
