Cam for BB
Thread Starter
Drifting
Joined: Sep 2004
Posts: 1,390
Likes: 4
From: Richmond VA
Cam for BB
I am having my BB finished and I decided I wanted a cam that sounded very strong and throaty. My engine guy recommended that we step up to the CompCam XE284H, is anyone familiar with this cam? My car is a good candidate for the more radical cam, because I dont have any thing that requires the vacuum. Such as, PS, PB, AC etc.. But until recently I thought that this was a good move. A few of you have said recently that its easy to go through cams in the BB's if your not careful. Any advice on how to be careful? I had the Roller rockers, lifters, push rods etc...stepped up, per the compcams tech support to make sure that we put the recommended support in the heads.
Racer
Joined: May 2000
Posts: 424
Likes: 1
From: Milford, MI
what compression are you running? The XE line from Comp cams are good for building cyl. pressure in lower C.R. motors which means if you put one in a high compression engine, you could be in ping city....
Also what gears and trans?
Also what gears and trans?
Safety Car
Joined: Feb 1999
Posts: 3,631
Likes: 14
From: Fountain Hills AZ
The cam affects a lot more than just how the engine sounds so you need to consider everything else that it does affect and how it works with the rest of your engine and car. Ideally, the cam you select will provide the power you want and where you want it. More information about your car (gearing, etc,) and how you use it would be helpful.
Thread Starter
Drifting
Joined: Sep 2004
Posts: 1,390
Likes: 4
From: Richmond VA
I believe that it has 9.5.1 compression and I am running 3:73 gear. I feel confident that the engine builder and Compcams went over the basics. I was just concerned with the threads that described the BB's eating cams and didnt know if there was any particular reason for this...something that I should look for...other than the obvious.
Racer
Joined: Dec 1999
Posts: 313
Likes: 0
From: San Mateo, CA.U.S.A california
I have a 454 with a 268 comp cam 342s runs great and fast. How much do you need??? You take more chances of breaking thing when you go to big of cam and not do everything right to go with it. Be carefull or your engine builder will be doing it a second time and you will PAY
Team Owner
Joined: Oct 2000
Posts: 38,897
Likes: 1,926
From: Washington Michigan
Stay away from the "hot-rod" ultra-high valve spring pressures - that's what kills valvetrains, especially in big-blocks. You have to decide whether you want a reliable street engine with good torque or high-rpm power with less reliability; there's no "free lunch". 
Thread Starter
Drifting
Joined: Sep 2004
Posts: 1,390
Likes: 4
From: Richmond VA
good advice all. I think that maybe a notch down in the aggressiveness in the cam should be a consideration. I do want a nice strong loppy sound, but more important, I need the reliability of the stock 427's.
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Race Director
Joined: May 2000
Posts: 12,712
Likes: 2,271
No, it's the OE 427/425 HP mechanical lifter cam and is available from Federal Mogul Speed Pro.
Most aftermarket cams have too much overlap. The OE cams are a better way to go. They use OE valve springs and you likey won't have valvetrain problems if you have the lash set properly and you don't overrev.
Duke
Most aftermarket cams have too much overlap. The OE cams are a better way to go. They use OE valve springs and you likey won't have valvetrain problems if you have the lash set properly and you don't overrev.
Duke