id cam lift etc.
Thread Starter
Melting Slicks
Joined: Jan 2003
Posts: 2,165
Likes: 8
From: Where are the Smoky Mountain Cruisers? Not Correctly Restored Stingray
id cam lift etc.
To figure cam lift, is it possible to remove heads, take rocker off, remove pushrod and then measure cam lift? Has anyone done this to id cam specs? what about angle?
Drifting
Joined: Oct 2000
Posts: 1,823
Likes: 52
From: Shawano WI
Re: id cam lift etc. (74 vert)
If all you want to measure is the lift then you only have to take the valve covers off.
To get cam lift then put a dial indicator directly over the pushrod on the rocker arm.
To get valve lift put the dial indicator on the valve spring retainer.
If it is a hyd. cam then you only have to rotate the motor from zero lift to full lift.
If you have a solid lifter cam then you first have to set to lash to zero.
To get any other information on the lobe profile you will need to be able to mount a degree wheel.
To get cam lift then put a dial indicator directly over the pushrod on the rocker arm.
To get valve lift put the dial indicator on the valve spring retainer.
If it is a hyd. cam then you only have to rotate the motor from zero lift to full lift.
If you have a solid lifter cam then you first have to set to lash to zero.
To get any other information on the lobe profile you will need to be able to mount a degree wheel.
Melting Slicks
Joined: Feb 2000
Posts: 3,052
Likes: 0
From: Vancouver BC, Canada
Re: id cam lift etc. (Pete79L82)
If all you want to measure is the lift then you only have to take the valve covers off.
To get cam lift then put a dial indicator directly over the pushrod on the rocker arm.
To get valve lift put the dial indicator on the valve spring retainer.
If it is a hyd. cam then you only have to rotate the motor from zero lift to full lift.
If you have a solid lifter cam then you first have to set to lash to zero.
To get any other information on the lobe profile you will need to be able to mount a degree wheel.
To get cam lift then put a dial indicator directly over the pushrod on the rocker arm.
To get valve lift put the dial indicator on the valve spring retainer.
If it is a hyd. cam then you only have to rotate the motor from zero lift to full lift.
If you have a solid lifter cam then you first have to set to lash to zero.
To get any other information on the lobe profile you will need to be able to mount a degree wheel.
Most accurate way that is reasonably simple, is do measure lobe lift at the pushrod tip. Make sure the dial indicator plunger is collinear with the pushrod. You will have to remove the rocker arm.
Safety Car
Joined: Jun 2001
Posts: 4,004
Likes: 2
From: Severna Park Md
Re: id cam lift etc. (74 vert)
You can measure lobe lift with the head off the the block by setting a dial indicator on the lifter. However its not nessisary to have the head off. As was already stated you can just remove the rocker arm and measure with dial indicator from the top of the pushrod. Remember you will be measuring the lobe lift only. To get actual valve lift you need to multiply the lobe lift by whatever the rocker arm ratio is. For instance, if your lobe lift measures .300 and your rocker arm ratio is 1.5, .300X1.5=.450 valve lift. Measure both intake and exhaust lobes since some cams have split design and would have different specs for intake and exhaust lobes.
