Well, I've have had this Crane cam, LS6 Springs, and Hardened Pushrods sitting around for quite awhile. It was going to go in the 5.3 until I just had to get a 6.0l. I've managed to dig a few more detalis on the cam besides duration and such. As copied from the website...


Main > Camshafts
Part Number: 1449521 Grind Number: HR-208/2941-2S-13.55
Engine Identification:
Start Yr. End Yr. Make Cyl Description
1997 Up CHEVROLET 8 GOOD IDLE WITH INCREASED LOW-END TORQUE AND MID-RANGE TORQUE AND HORSEPOWER FOR CORVETTE AND CAMARO-FIREBIRD APPLICATIONS WITH AUTO OR MANUAL TRANSMISSION. BASIC RPM 1500-5000
Engine Size Configuration
5.7 L V

Valve Setting: Intake .000 Exhaust .000 HOT

Lift: Intake @Cam 2941 @Valve 500 All Lifts are based
on zero lash and theoretical rocker arm ratios.
Exhaust @ Cam 294 @Valve 500
Rocker Arm Ratio 1.70

Cam Timing: TAPPET @.004
Lift: Opens Closes ADV Duration
Intake 23.0 BTDC 69.0 ABDC 272.0 °
Exhaust 73.0 BBDC 27.0 ATDC 280.0 °

Spring Requirements: Triple Dual Outer Inner
Part Number 144308-1 SPRING KIT
Loads Closed 82 LBS @ 1.800 or 1 51/64
Open 251 LBS @ 1.320
Recommended RPM range with matching components
Minimum RPM 1800
Maximum RPM 5200
Valve Float 6000

Cam Timing: TAPPET @.050
Lift: Opens Closes Max Lift Duration
Intake (4.0) ATDC 32.0 ABDC 108 208.0 °
Exhaust 46.0 BBDC (10.0) BTDC 118 216.0 °

Remarks:
FIRING ORDER: 1-8-7-2-6-5-4-3

I'll be by the shop on Friday and get the actual grind number to see if this info still stands.

My questions are: How critical is this max RPM of 5200? Valve float occurs at 6000. Would my rev. limiter be OK at near stock (~5800?). Also this is for a Rocker Arm Ratio of 1.7. Aren't the trucks 1.8? Does this affect the RPM range?

Hopefully I didn't throw to much at you all at once.

As always...

 

Please get a new cam. With that .500 lift you'll be leaving too much power on the table. Plus, that cam has such slow opening lobes. A more aggressive comp grind will make more power up top and down low. Do yourself a favor and sell that one on ebay and get a comp XE high lift grind.

 

Thanks BigTex, I figured as much. Not too much of a problem though since I'll need a new cam for when I go blown. Looks like it may be much sooner now since I don't need to get my money's worth out of this cam. Can't wait to see if the Radix will flow a 409 from some of the more "aggressive" members.

 

I drove a pickup with that exact cam, Crane 144832 dual springs, and the 1.8 Crane rockers and it was a great running piece. Good torque, great improvement in everyday driving and great fuel economy. The springs you have don't hold up well at all. The 1.8 rockers give about .531 lift, but it is still much milder than the stock 6.0 cam. That is also one of Crane's older lobes. They have a whole new group of what they call Quick Lift lobes that are super quick ramps. Their new gold 1.8 Quick Lift rockers come off the seat at 1.89 and then, due to the pushrod seat placement, the rocker ratio decreases as the pushrod seat area rises. At about .300 net lift the ratio decreases to 1.82 and that ratio is maintained throughout the lift cycle until the valve is within .300 of returning to the seat and the ratio increases to 1.89. Joe Vinci says that their new Quick Lift cams combined with the Quick Lift rockers give a duration at .300 valve lift that is comparable to other cams that are 6 to 8 degrees bigger at .050. Put one of their new Quick Lift 216/224 grinds in with the 144832 springs and those rockers and you will have over .580 lift and a real great running truck. They even have a new power tuner that has programming for those cams in it and it supports supercharging, high flow injectors, headers and free flowing exhaust. Just plug it in and in 3 minutes your vehicle is all tuned. Drove a 5.3 Tahoe with that cam and a Magnuson supercharger, high flow injectors, headers and exhaust. You would have sworn it had a super healthy 502 under the hood and it drove like a dream part throttle. Come to think of it you might have to change your computer to a 6.0 to use the tuner. You might want to call Vinci High Performance in Orlando and talk to Joe. Why not call Crane and see if you can trade it in on one of the newer grinds. They might do it since you haven't used it and you are going to a 6.0L. All they can say is no!