CAM Replacement Info. !!
Thread Starter
Racer
Joined: Mar 2002
Posts: 397
Likes: 2
From: Marstons Mills MA
CAM Replacement Info. !!
From the LS1 web cite:
The LS1 is the most camshaft installer-friendly engine around, due to GM's innovative lifter retainer feature that does not require the removal of the intake manifold to swap the cam. Simply remove the pushrods and spin the crank around, and a plastic retainer will hold the lifters up off the cam lobes. They are pushed back down when the rockers and push rods are installed. As always, most cam companies take an oath of silence when it comes to bump-stick specifications, only offering lift, duration, and LSA numbers. Using a cam that is ground on a 114 LSA will be acceptable to the stock calibration and will gain approximately 65 rear wheel horsepower on an engine with a free flowing intake and exhaust system. LSA values of 112 degrees or lower will require substantial reworking of the PCM. Crane has released bolt-on 1.8 ratio rockers to replace the stock 1.7 units, although we must give GM some credit here, in that the LS1 stock rocker is probably the nicest engine component they've ever produced.
Nice to know this! Now, if only the radiator did not need to be removed for installation, this would indeed be easy! :p:
The LS1 is the most camshaft installer-friendly engine around, due to GM's innovative lifter retainer feature that does not require the removal of the intake manifold to swap the cam. Simply remove the pushrods and spin the crank around, and a plastic retainer will hold the lifters up off the cam lobes. They are pushed back down when the rockers and push rods are installed. As always, most cam companies take an oath of silence when it comes to bump-stick specifications, only offering lift, duration, and LSA numbers. Using a cam that is ground on a 114 LSA will be acceptable to the stock calibration and will gain approximately 65 rear wheel horsepower on an engine with a free flowing intake and exhaust system. LSA values of 112 degrees or lower will require substantial reworking of the PCM. Crane has released bolt-on 1.8 ratio rockers to replace the stock 1.7 units, although we must give GM some credit here, in that the LS1 stock rocker is probably the nicest engine component they've ever produced.
Nice to know this! Now, if only the radiator did not need to be removed for installation, this would indeed be easy! :p:
Instructor
Joined: Jun 2002
Posts: 239
Likes: 0
From: Port Orange Fl
Re: CAM Replacement Info. !! (CapeCodCoupe)
You must be very trusting in the plastic retainer, but to not get the dredded ker-plunk of the lifter into the oil pan please try the pen magnet trick to keep the lifter in place. oh yea do a search to find the info.
Drifting
Joined: Jul 2000
Posts: 1,818
Likes: 3
From: SoCal
Re: CAM Replacement Info. !! (CapeCodCoupe)
Nice to know this! Now, if only the radiator did not need to be removed for installation, this would indeed be easy! :p:
Thread Starter
Racer
Joined: Mar 2002
Posts: 397
Likes: 2
From: Marstons Mills MA
Re: CAM Replacement Info. !! (jmX)
No offsense, but removing the radiator will be one of the easiest parts of a cam swap on a C5. [/QUOTE]
Hey jmX, what is the most difficult part of the cam swap? :flag
Hey jmX, what is the most difficult part of the cam swap? :flag
Premium Supporting Vendor
Joined: Jan 2001
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From: Central Jersey
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Re: CAM Replacement Info. !! (CapeCodCoupe)
No offsense, but removing the radiator will be one of the easiest parts of a cam swap on a C5.
Hey jmX, what is the most difficult part of the cam swap? :flag
Hey jmX, what is the most difficult part of the cam swap? :flag
