A slightly different version of Patrick G's cam
A slightly different version of Patrick G's cam I am trying to pick between two cams for 2.5 PRC 5.3s. I am aiming for a 6300-6400 shift point at most. The first is a 223/223 with LSK lobes on a 110+2 using 0.045 gaskets. With the VE spreadsheet that ends up having a 39.5 IVC, 43.5 EVO and a DCR of 8.80. The second is a 227/227 with LSK lobes on a 110+4 using 0.045 gaskets. That ends up having a 39.5 IVC, 47.5 EVO, and thus the same DCR of 8.80. Will either or both of these meet my needs of a powerful street cruiser that will only see the track 2-3 times a year? If both do, which do you think would better match the heads? I know the 223 would have a better midrange but the 227 will be slightly better on the top end. Which would give the best power under the curve? I am kind of stuck on these two because of the relatively low overlap compared to a split cam of the same size and since I don't need to carry the power very far past peak with the low shift points. Will that DCR be too high for 93 octane?
BTW this combo will be used with a SS3600 or SS4000.
BTW this combo will be used with a SS3600 or SS4000.
Both will be excellent at meeting your needs. The 227/227 will make a little more overall power. Your actual DCR is going to be lower than 8.8:1 though. The 227 lobes check in closer to 279@ .006". Use this for your DCR calculations and you'll find it in acceptable range for 93 octane.
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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.
Thanks! Anyone else? I don't think I have seen anyone yet with these exact specs? 
240/240 is much bigger than what I am looking for but thanks. What is everyone thoughts about using a .040 gasket to achieve a DCR of 8.84? Would that be too high for 93? Will there be any PTV issues with the 227 and these heads?
