454 mag looking for a little more hp
10-07-2013, 10:13 AM
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454 mag looking for a little more hp
Recently picked up 242ls carbed 454 mag with 600hours.. Needs new valve guides so was thinking of pulling the heads and sending them out for a port and polish. I have a set of EMI thunder manifolds that I'm putting on on the spring. Anyone know if there's any power to be had out of these heads or should I be doing a cam also? Anyone with experience with this I would appreciate it. I don't want to build a high HP motor just looking for another 50-75 ponies.
Last edited by KMONEY306; 10-07-2013 at 10:15 AM.
10-07-2013, 10:22 AM
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Don't want to spend a lot. Like I said not looking for much power. People tell me these motors stock are breathing through a straw. I figured I'd let it breathe better with exhaust and a head job.
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11-05-2013, 08:52 AM
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If you want another 50-75 HP. This is what you need to spend your money on.
A new cam, I'm going to sound like a broken record but call Bob Madara for that, if you need his number I will give it to you. A V-6 module for your ignition, don't waste your money on MSD stuff, you won't see any gain and it's less durable. Find an HP500 carb, or a Holley 800, then the valve train to match the cam. Then look for a nice performance exhaust manifold, this is a must for a performance cam. If you have some spare coin, having the exhaust ports ported would help but I wouldn't do more than that. For $2100 you can get a set of AFR ovals, when combined with the right cam would yield you at least a 100 hp increase. Head work is expensive and it doesn't take much before it's cheaper to just buy new heads.
You don't need to replace your intake- the stock Mag intake is very good until you're spinning over 5500 rpms. Good luck with your build.
A new cam, I'm going to sound like a broken record but call Bob Madara for that, if you need his number I will give it to you. A V-6 module for your ignition, don't waste your money on MSD stuff, you won't see any gain and it's less durable. Find an HP500 carb, or a Holley 800, then the valve train to match the cam. Then look for a nice performance exhaust manifold, this is a must for a performance cam. If you have some spare coin, having the exhaust ports ported would help but I wouldn't do more than that. For $2100 you can get a set of AFR ovals, when combined with the right cam would yield you at least a 100 hp increase. Head work is expensive and it doesn't take much before it's cheaper to just buy new heads.
You don't need to replace your intake- the stock Mag intake is very good until you're spinning over 5500 rpms. Good luck with your build.
