cam help
Thread Starter
Staging Lane
Joined: Jul 2004
Posts: 69
Likes: 0
From: Sacramento, California
cam help im doing the hot cam kit and i want to replace the lifters and push rods. I found the lifters im going to use from comp cam but im not sure on the right size of push rods to use comp cam has a 3/8" diameter and a 5/16" for standard small block, can any body help me?
thanks
thanks
TECH Apprentice
Joined: Feb 2005
Posts: 384
Likes: 0
The stock pushrods are 5/16" diameter by 7.200" length.
I bought Comp Cams part number 63-7808-16 from ThunderRacing-- hardened -- about $40. Depending on year, you might have hardened pushrods from factory. Mine were, but I wanted to replace them just for peace of mind...
I bought Comp Cams part number 63-7808-16 from ThunderRacing-- hardened -- about $40. Depending on year, you might have hardened pushrods from factory. Mine were, but I wanted to replace them just for peace of mind...
Thread Starter
Staging Lane
Joined: Jul 2004
Posts: 69
Likes: 0
From: Sacramento, California
beautiful, you could not of helped me any more, thank you very much!!!!!!or wait maby one more, these push rods above are for the factory size cam, will they work with the lt4 hot cam?
Last edited by BLACKDEATH; Mar 17, 2005 at 02:11 PM.
TECH Apprentice
Joined: Feb 2005
Posts: 384
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Pushrod length is more determined by the valvetrain geometry (heads/valve height/etc) -- not so much by the camshaft.
You should be absolutely fine, but if you want to check it for peace of mind, you can mark the top of the valvestem for the #1 intake/exhaust valves -- with a black sharpie marker, install the rocker arms and set lash, and then turn the motor over a few times. You can then remove the rockers again and check for correct contact pattern on the valvestem tip. It should be fairly centered, and fairly thin.
Like I said, you should be absolutely fine with stock length rods though. We can get more detailed with the wear-pattern check if you wish. If you think it may be off, a pushrod length checker tool will allow you to adjust until you find the correct pushrod length, and then you can measure the tool and order the correct rods.
You should be absolutely fine, but if you want to check it for peace of mind, you can mark the top of the valvestem for the #1 intake/exhaust valves -- with a black sharpie marker, install the rocker arms and set lash, and then turn the motor over a few times. You can then remove the rockers again and check for correct contact pattern on the valvestem tip. It should be fairly centered, and fairly thin.
Like I said, you should be absolutely fine with stock length rods though. We can get more detailed with the wear-pattern check if you wish. If you think it may be off, a pushrod length checker tool will allow you to adjust until you find the correct pushrod length, and then you can measure the tool and order the correct rods.
I'll be putting over 400 RWHP with my setup Thread Starter
Staging Lane
Joined: Jul 2004
Posts: 69
Likes: 0
From: Sacramento, California
Originally Posted by Alex94TAGT
Pushrod length is more determined by the valvetrain geometry (heads/valve height/etc) -- not so much by the camshaft.
You should be absolutely fine, but if you want to check it for peace of mind, you can mark the top of the valvestem for the #1 intake/exhaust valves -- with a black sharpie marker, install the rocker arms and set lash, and then turn the motor over a few times. You can then remove the rockers again and check for correct contact pattern on the valvestem tip. It should be fairly centered, and fairly thin.
Like I said, you should be absolutely fine with stock length rods though. We can get more detailed with the wear-pattern check if you wish. If you think it may be off, a pushrod length checker tool will allow you to adjust until you find the correct pushrod length, and then you can measure the tool and order the correct rods.
You should be absolutely fine, but if you want to check it for peace of mind, you can mark the top of the valvestem for the #1 intake/exhaust valves -- with a black sharpie marker, install the rocker arms and set lash, and then turn the motor over a few times. You can then remove the rockers again and check for correct contact pattern on the valvestem tip. It should be fairly centered, and fairly thin.
Like I said, you should be absolutely fine with stock length rods though. We can get more detailed with the wear-pattern check if you wish. If you think it may be off, a pushrod length checker tool will allow you to adjust until you find the correct pushrod length, and then you can measure the tool and order the correct rods.
