XFI 280 vs 306
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Joined: Nov 2005
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XFI 280 vs 306 CC 249-07-467-8 VS CC 249-07-306-8
Which cam will make more power on a properly tuned LT1 with the proper supporting mods I:E; LT headers, 58mm tb, ported heads, 1.6RRs, 2800-3200 stall, etc.
I know that the 1.6s will bump up the lift on the 306.
Here are the advertised specs, however, doesn't the XFI have a more aggresive lobe?
XFI" 280 Hydraulic Roller Camshaft
CC 249-07-467-8
Lift: .576"/.570" w/1.6 Rockers
Duration: 280°/288°
RPM Range: 2000-6000
Operating Range: 2000-6000 RPM
Duration Advertised: 280° Intake / 288° Exhaust
Duration @ .050'' Lift: 230° Intake / 236° Exhaust
Valve Lift w/1.6 Rockers: .576'' Intake / .570'' Exhaust
Lobe Separation Angle: 113°
Xtreme Energy 290HR-12 Hydraulic Roller Camshaft
CC 249-07-306-8
Lift: .510''/.540''
Duration: 290°/307°
RPM Range: 1800-5800
Operating Range: 1800-5800 RPM
Duration Advertised: 290° Intake / 307° Exhaust
Duration @ .050'' Lift: 230° Intake / 244° Exhaust
Valve Lift w/1.5 Rockers: .510'' Intake / .540'' Exhaust
Lobe Separation Angle: 112°
Thanks
Mike
Which cam will make more power on a properly tuned LT1 with the proper supporting mods I:E; LT headers, 58mm tb, ported heads, 1.6RRs, 2800-3200 stall, etc.
I know that the 1.6s will bump up the lift on the 306.
Here are the advertised specs, however, doesn't the XFI have a more aggresive lobe?
XFI" 280 Hydraulic Roller Camshaft
CC 249-07-467-8
Lift: .576"/.570" w/1.6 Rockers
Duration: 280°/288°
RPM Range: 2000-6000
Operating Range: 2000-6000 RPM
Duration Advertised: 280° Intake / 288° Exhaust
Duration @ .050'' Lift: 230° Intake / 236° Exhaust
Valve Lift w/1.6 Rockers: .576'' Intake / .570'' Exhaust
Lobe Separation Angle: 113°
Xtreme Energy 290HR-12 Hydraulic Roller Camshaft
CC 249-07-306-8
Lift: .510''/.540''
Duration: 290°/307°
RPM Range: 1800-5800
Operating Range: 1800-5800 RPM
Duration Advertised: 290° Intake / 307° Exhaust
Duration @ .050'' Lift: 230° Intake / 244° Exhaust
Valve Lift w/1.5 Rockers: .510'' Intake / .540'' Exhaust
Lobe Separation Angle: 112°
Thanks
Mike
Last edited by aboatguy; May 7, 2006 at 09:49 PM.
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Joined: Jul 2005
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From: Midland
I'd like to know too, I bought the 280XFI looking to make some good power and would like to see how it compares to the 306 as well. I have some Hi-Tech 1.65rr to go with it on a sick set of heads, but I've been unable to see any similar combos out there. The XFI cams have been out since late '04, but I don't see many guys using them on the boards.
Last edited by 91Z28; May 7, 2006 at 11:25 PM.
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Joined: Dec 2005
Posts: 3,092
Likes: 11
I know one car running the 230 XFI cam. It is a third gen L98 motor in a 1986 Grand Prix with the stock TPI runners. He has AFR 190 heads and a good exhaust system. With a 700R4 he is putting down 331 RWHP and around 380RWTQ. The power is going to go up quite abit when he puts on a better flowing intake system. Me, I will be installing the 218XFI in my current buildup.
