224/228 110+1 vs. 224/220 108-1
05-31-2007, 09:10 AM
#1
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224/228 110+1 vs. 224/220 108-1 Since my header install a few weeks back I have been doing more and more research on cams. I am looking for a street cam with abundant low to mid range torque that will have pretty good pull to around 6500 or so. My goal would be 400 RWHP and 400 Ft-Lbs with stock heads. I know this goal may be a far reach but "it is what it is".....a goal! The cams listed above would be both ground with XE-R lobes. They both have 6* of overlap. Valve events at 0.050" are as follows:
224/228 110+1
IVO = 3
IVC = 41
EVO = 45
EVC = 3
224/220 108-1
IVO = 3
IVC = 41
EVO = 37
EVC = 3
The car will be 95% street driven and an LS6 intake will be added prior to the install. A set of heads may be in the future but as of now it is more likely a much later install. Any opinions/suggestions would be greatly appreciated. I know these types of posts come up often but I would like to hear what everyone has to say. Thanks.
224/228 110+1
IVO = 3
IVC = 41
EVO = 45
EVC = 3
224/220 108-1
IVO = 3
IVC = 41
EVO = 37
EVC = 3
The car will be 95% street driven and an LS6 intake will be added prior to the install. A set of heads may be in the future but as of now it is more likely a much later install. Any opinions/suggestions would be greatly appreciated. I know these types of posts come up often but I would like to hear what everyone has to say. Thanks.
05-31-2007, 01:14 PM
#3
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Predator, it seems as though the 226/224 108-1 will make more torque than the 224/228 but it will make it slightly higher than the 224/220 [EVC = 37 for 224/220 vs. 39 for 226/224]
I do not fully understand the relationship between IVO and EVC. I know you have mentioned before that having them equal will allow good carry after peak. What does it mean when IVO is greater than EVC and visa versa? The reason I ask is because the 226/224 has IVO = 4 and EVC = 5.
Also the "bigger" reverse split has more overlap which I do like so I would assume it will make good power in the upper RPM range.
I do not fully understand the relationship between IVO and EVC. I know you have mentioned before that having them equal will allow good carry after peak. What does it mean when IVO is greater than EVC and visa versa? The reason I ask is because the 226/224 has IVO = 4 and EVC = 5.
Also the "bigger" reverse split has more overlap which I do like so I would assume it will make good power in the upper RPM range.
06-01-2007, 01:23 AM
#4
TECH Senior Member
It is a matter of having the VE more intake biased Vs the exhaust.
A cam that is more intake biased will carry further after peak, while a cam that is exhaust biased will be more peaky.
Being equidistant from TDC makes it neither exhaust nor intake biased and is the compromise point (best of both worlds).
Depending on the cam purpose, I like either equidistant or 1, maybe 2* intake biased.
A cam that is more intake biased will carry further after peak, while a cam that is exhaust biased will be more peaky.
Being equidistant from TDC makes it neither exhaust nor intake biased and is the compromise point (best of both worlds).
Depending on the cam purpose, I like either equidistant or 1, maybe 2* intake biased.
