building a 460
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New User
Joined: Aug 2007
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building a 460
im wanting to build a 460 to put in my f250 for 300 ft dirt drag racin.if i put 10.1 pistons,a cam with around 2500-6500 power range and port the heads,edlebrock intake,770 holley,and headers how much hp would i be lookin at?i also have the 95cc heads.thanks
Postmaster
Joined: Nov 2001
Posts: 3,351
Likes: 1
From: Escondido, CA
There are a few other things besides the ones you listed that dictate power output. If you look at the other post you have concerning the cam it explains a few things. Plus upgrading the heads with larger valves and removing the air injection humps does wonders for improving flow. With the items you listed, you might be able to see 400-450 HP with a little more TQ as a wild guess. Will this truck be a dedicated mud runner or see street use aas well?
Postmaster
Joined: Nov 2001
Posts: 3,351
Likes: 1
From: Escondido, CA
What kind of budget do you have? These can be blown through like a hookers panties if your not careful and don't plan realistically. For instance, on my engine I paid a little over $5000 in parts and machine work to give me an engine I could do practically, short of nitros and forced induction, what ever I want later down the road. The only parts that are original are the block, head castings and the crank. It also took 3 months to gather all the parts from various sources for a decent price. Researching your goal is the key to a reliable build as most people will tell you.
A few good things to to learn from...
1. Talk with the shop you want to do the work. Most of the time they will explain what things you can do at home or advise you what you shouldn't even try. Sometimes you can even figure out if they should even be allowed to touch a set of calipers to measure your parts. If you're not sure yourself post what they recommend here and someone will be able to advise you.
2. Quality machine work AFTER you blue print the block and heads with some help from some of the publications available at most book stores or online. Look at the reincarnation website for more info. Seems that I see a few that don't listen to this and port their heads after the new seats are cut and end up nicking them.
3. 4 bolt main caps are not a requirement. However I do recommend main studs for a little extra insurance.
4. Balance the rotating assembly as much as the shop is willing too. This will allow the engine to rev faster and survive multiple high RPM pulls with which you're intending to do.
There are more but this is all the time I have at the moment. I am sure there will be more that others will post.
A few good things to to learn from...
1. Talk with the shop you want to do the work. Most of the time they will explain what things you can do at home or advise you what you shouldn't even try. Sometimes you can even figure out if they should even be allowed to touch a set of calipers to measure your parts. If you're not sure yourself post what they recommend here and someone will be able to advise you.
2. Quality machine work AFTER you blue print the block and heads with some help from some of the publications available at most book stores or online. Look at the reincarnation website for more info. Seems that I see a few that don't listen to this and port their heads after the new seats are cut and end up nicking them.
3. 4 bolt main caps are not a requirement. However I do recommend main studs for a little extra insurance.
4. Balance the rotating assembly as much as the shop is willing too. This will allow the engine to rev faster and survive multiple high RPM pulls with which you're intending to do.
There are more but this is all the time I have at the moment. I am sure there will be more that others will post.
Elder User
Joined: Jun 2004
Posts: 800
Likes: 6
From: Edmonton, Alberta Canada
the heads are where you are going to make or break this engine.
depending on how much you do to port these heads and upgrade them, with proper parts selection, your combo can make anywhere from 400hp with mild porting up to 550 or more hp with major porting and head work.
the factory heads are capable of up to 600hp in ported and modified form, but probably are not capable of supporting more than 450hp in stock or mild cleanup condition. just way to restricitve exhaust ports.
to do it properly, get the heads ported, larger valves installed (at least 2.19" intakes) flowed and then take the flow numbers to the cam supplier to get a cam suited to your needs and head potential. no sense in sticking a big cam in an engine that can't support it.
check out reincarnation-automotive.com. he can get max flow out of the stock big block heads and has a section on how to properly port your heads (cost $25 registration fee, but well worth it (not to view the site but to get the porting info)).
rgds
Mike
depending on how much you do to port these heads and upgrade them, with proper parts selection, your combo can make anywhere from 400hp with mild porting up to 550 or more hp with major porting and head work.
the factory heads are capable of up to 600hp in ported and modified form, but probably are not capable of supporting more than 450hp in stock or mild cleanup condition. just way to restricitve exhaust ports.
to do it properly, get the heads ported, larger valves installed (at least 2.19" intakes) flowed and then take the flow numbers to the cam supplier to get a cam suited to your needs and head potential. no sense in sticking a big cam in an engine that can't support it.
check out reincarnation-automotive.com. he can get max flow out of the stock big block heads and has a section on how to properly port your heads (cost $25 registration fee, but well worth it (not to view the site but to get the porting info)).
rgds
Mike
