changing cams
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Senior User
Joined: Feb 2004
Posts: 171
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From: maui
changing cams
i was changing the damper and check the timing chain and found that is was kind of loose and since im going to buy a new one,im also changing the cam which is probably as old as the timing chain.i need suggestions on brands,i just know about edelbrock rpm or comp cams.i currently have a performer rpm manifold and 670 truck avenger carb.
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
There are a lot of options. but for the sake of a starting point. go to cranecams.com and check out the 343901 and the 343941. Unless you want to change a lot of valve train parts, you might stay with something reasonable like the 343901. You could probably run the 941 on stock stuff, but it better be in good shape. Optimal performance will come with matching springs.
Compresion ratio is an important factor. look at the cam descriptions for more useful info.
Compresion ratio is an important factor. look at the cam descriptions for more useful info.
Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
If its the 428CJ, you really have to watch the compression ratio and match the cam to that. 8.0 - 9.5 for the Crane 343901, and 8.75 - 10.75 for the 343941. Realistically I'd use the 901 up to 9.5, and the 941 from 9.5 to 10.75.
I am running the 941 with stock valvetrain components and have yet to see a problem. However, you do want to get the matching Crane valvesprings.
As always, new lifters.
I am running the 941 with stock valvetrain components and have yet to see a problem. However, you do want to get the matching Crane valvesprings.
As always, new lifters.
Posting Guru
Joined: Feb 2004
Posts: 1,354
Likes: 0
From: Jackassville
Originally Posted by gtex
There are a lot of options. but for the sake of a starting point. go to cranecams.com and check out the 343901 and the 343941. Unless you want to change a lot of valve train parts, you might stay with something reasonable like the 343901. You could probably run the 941 on stock stuff, but it better be in good shape. Optimal performance will come with matching springs.
Compresion ratio is an important factor. look at the cam descriptions for more useful info.
Compresion ratio is an important factor. look at the cam descriptions for more useful info.
I am running the Crane 901 in my FE, do you think I will be alright with stock valve springs? I am worried that I may float a valve at high rpms. I am also running stock rocker arms and pushrods, no problems yet. The only thing Im worried about are those springs.
Thanks
Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
Well I'm not Greg, but I think you'll be fine with the stock springs and the 901, so long as the stock springs are in good condition. That said, I'd replace 'em with Crane springs the next time you have the valve covers off, but until then, I wouldn't worry about it. That things sees never sees the far side of 5000rpm, right?
Elder User
Joined: Jun 2003
Posts: 686
Likes: 1
From: Edgewood, Wa
Originally Posted by FERacing66
I am running the Crane 901 in my FE, do you think I will be alright with stock valve springs? I am worried that I may float a valve at high rpms. I am also running stock rocker arms and pushrods, no problems yet. The only thing Im worried about are those springs.
Thanks
Thanks
