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4.9 performance

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Old May 12, 2010 | 03:53 PM
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4.9 performance

hey guys, i was wondering what the best way to add a bit of power to a 300 would be?
 
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Old May 12, 2010 | 05:41 PM
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offy intake w/ around a 450-500 cfm carb, 1.7 chevy 250 rocker arms, efi dual exhaust manifold
 
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Old May 13, 2010 | 05:35 AM
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thanks alot! would that make a sigificant amount of power or nothing to crazy?
 
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Old May 13, 2010 | 06:47 AM
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that will make a nice bump in power but nothing crazy. to get big power takes more money (cam, roller rockers, better ignition, head work, ect)
 
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Old May 13, 2010 | 06:53 AM
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A good forum to look through is the 6-banger one here:
Ford Inline Six, 200, 250, 4.9L / 300 - Ford Truck Enthusiasts Forums
 
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Old May 13, 2010 | 08:15 PM
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thanks for the info!
 
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Old May 13, 2010 | 08:57 PM
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wow !

Originally Posted by 1bad67sbf
offy intake w/ around a 450-500 cfm carb, 1.7 chevy 250 rocker arms, efi dual exhaust manifold

Tell me more about 1.7 chevy rocker arms
 
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Old May 13, 2010 | 09:05 PM
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stock rockers are 1.6 and chevy 250ci 6 cylinder has 1.7 rockers so they give you more lift on the cheap (without buying a cam)
 
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Old May 13, 2010 | 10:55 PM
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Dean Scrooby,If you want some good input on 4.9 mods,go to the 6 cylinder forum on here.either start a thread or search the forum,every thing from mild to wild,and welcome aboard!
 
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Old May 14, 2010 | 08:16 AM
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They bolt right up

So the chevy rocker arms fit on the Ford? with no problems. plug and play?
 
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Old May 14, 2010 | 11:45 AM
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Better do some checking on that,I think push rod length may be affected.Search sbc rockers on the Inline 6 forum.Lots of info there.
 
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Old May 14, 2010 | 04:09 PM
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everyone is right i know some but some of those guys live 300, 6. im more a small block guy that has a 300 in one of my trucks
 
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Old May 14, 2010 | 05:40 PM
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i thank you all again for all the info! what i am trying to do is figure out if i could get some more power out of the 300 or if it would be easier to do a engine swap? i do alot of towing with the truck and work it pretty hard. what engine would you recomend if i were to do a swap? i have a 1984 f150, 4x4, 4 speed.
 
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Old May 14, 2010 | 05:45 PM
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they will tell you to keep the 300 or use a 351w. i was going to put a 302 in mine and nobody thought that was a good idea! but i love 302s
 
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Old May 14, 2010 | 08:47 PM
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I just picked up a 429 for my truck, I was gonna go 351 but the 300 uses a BB bellhousing so i figured what the hell, why not.
 
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