454 cam replacement
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454 cam replacement
I've read a ton of posts on this, but still haven't found what I'm looking for.. does anyone have the specs for a stock '89 454 mag cam? The manual has lift, but no duration, centerline, etc. Also, what roller cams have people had luck with? I'm hoping to maintain close to stock performance, and not have to change valve springs.
#2
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Jb
The stock cam was a Crane Cam, flat tappet design i believe. I have just changed to a Crane 168731 Hy-roller that along w/ Iron Eagle heads allowed me to pull almost 500 hp on my .060 over 400 HP mercs.
Wannabe
Wannabe
Last edited by wannabe; 08-21-2008 at 01:36 PM. Reason: HP adjustment
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The good thing is the 365HP really wakes up from a cam and exhaust upgrade. Dont bother swapping cams unless you have some decent exhaust.
If I were going to upgrade a 454 mag, I would
install good exhaust,
roller cam upgrade
roller rockers
switch to a holley 4150 800CFM
good intake
If I were going to upgrade a 454 mag, I would
install good exhaust,
roller cam upgrade
roller rockers
switch to a holley 4150 800CFM
good intake
Last edited by MILD THUNDER; 08-21-2008 at 08:55 PM.
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You can put in a flat tappet cam from an early generration 502 carbed engine and leave everything else alone and wake it up a little.
That way you can still use the old srings and exhaust.
That way you can still use the old srings and exhaust.
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call ultradyne and talk to Tim golsbe he's the man they did all the cam engineering in the 80's for mercruiser big block and small block chevys
Ultradyne Bullet Racing Cams at (662)893-5670
Ultradyne Bullet Racing Cams at (662)893-5670