Improving a stock EFI 460

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Improving a stock EFI 460

Post  njstang87 on September 20th 2013, 12:47 pm

I have a 1994 F250 with a 460 in it and will be pulling the heads. I was curious if it would be worth my time porting the heads and intake while I have it apart. I am also putting headers on it. This will be in a daily driver that will tow and may see a truck pull or two. If this is a good idea what are the areas that need the most help (on the intake and heads). Anyone with experience doing this I would appreciate the help. Thank you.

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Re: Improving a stock EFI 460

Post  rmcomprandy on September 20th 2013, 4:31 pm

There is some power in porting the intake manifold.
Milling the heads .020" and installing 2.11" intake valves with a good valve job and bowl porting can be worth quite a bit of power.

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Re: Improving a stock EFI 460

Post  johndickjr on September 20th 2013, 7:36 pm

Be sure the headers are for a efi head..the efi exhaust port is different then pre efi head

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Re: Improving a stock EFI 460

Post  SandHillsHillbilly on September 20th 2013, 7:47 pm

rmcomprandy wrote:There is some power in porting the intake manifold.
Milling the heads .020" and installing 2.11" intake valves with a good valve job and bowl porting can be worth quite a bit of power.
How much will that reduce the chamber?

Check with L and L Products or Stan's Headers they both offer headers. Stan's being the better ones.
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Re: Improving a stock EFI 460

Post  rmcomprandy on September 20th 2013, 11:36 pm

SandHillsHillbilly wrote:
How much will that reduce the chamber?

About 3.6 cc's.

Milling the block is the better choice but, you are not removing that or taking it apart.

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Re: Improving a stock EFI 460

Post  dfree383 on September 21st 2013, 12:13 am

A cam and lifters i definetly a worthwhile upgrade while your down that far too.
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Re: Improving a stock EFI 460

Post  SandHillsHillbilly on September 21st 2013, 12:47 am

If you decide to upgrade the rocker arms beware. You need to use pedestal rockers. If you upgrade to screw in studs factory valve covers will not fit. There is only one person (company) offering aftermarket center bolt valve covers. I checked the first part of this week and he is not accepting any orders due to surgery.
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Re: Improving a stock EFI 460

Post  johndickjr on September 21st 2013, 10:48 am

Better off using early heads like dove head..if you stay efi dont go to big on cam or the ecu flips out

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Re: Improving a stock EFI 460

Post  dfree383 on September 21st 2013, 12:17 pm

johndickjr wrote:Better off using early heads like dove head..if you stay efi dont go to big on cam or the ecu flips out
Only issue is converting an intake to EFI for the early heads, it adds money. the factory EFI heads are actually pretty decent.
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