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Discussion Starter #1 (Edited)
This is my first Ford build and I am excited to see what I can do to bring a stock 460 to life. I inherited a clean 89 F-250 with a fuel injected 460, C-6, 4:10 gears, a DNE2 overdrive unit, no rust, and 90K miles I use this for towing camper and goose neck trailer primarily and I am, like everyone, looking to get more power. There are three of us who have relatively the same trailers; uncle, cousin, and I. My uncle has a 01 Dodge with a V-10 and I can't even touch him when it comes to towing; he just walks away from me and gets better mileage doing it. My cousin has a 5.7 HEMI and with 115 CI difference in engines, I have a hard time keeping up with him - it's embarrassing. 65-70 is about as good as I can do while getting 4-5mpg. Looking at the factory HP numbers, they really aren't that impressive AND not much more than the 351 overall.

I ran into a Ford guy and he told me that because this was the first year for fuel injection, they put really mild cams and lowered the compression ratio in order to pass emissions, is that true?

I like the truck and my budget won't allow for a different truck at the moment, so I am going to make due for a while. I am contemplating changing cams and milling the heads to bring the compression ratio up. I understand it isn't going to get diesel fuel economy, but I would like it to make more power for the amount of fuel it's using.

What cam would you recommend for towing? Any other mods I could do to make this tow better?
 

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HI, welcome to the world of the 460. I don't know much of the EFI I'm a carb man but listen to Mad Porter. Be careful of milling it well change the mounting of the intake (it changes angles and such). Timing set change to a straight up set well help quit a bit, re-curve distributor (if applicable ), headers.. Check with you local emissions folks if you have to be tested well change what you can do.. Motor might just be tired??
good luck
tim
 

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Discussion Starter #3
HI, welcome to the world of the 460. I don't know much of the EFI I'm a carb man but listen to Mad Porter. Be careful of milling it well change the mounting of the intake (it changes angles and such). Timing set change to a straight up set well help quit a bit, re-curve distributor (if applicable ), headers.. Check with you local emissions folks if you have to be tested well change what you can do.. Motor might just be tired??
good luck
tim
If I took a lot off the heads, I would mill the intake to match it. I don't think the engine is tired, just low powered. I don't need to worry about emission stuff here; plus all of that stuff has been removed anyway.
 

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All EFI 460 have the straight up timing gear/chain set. Nothing in the dist. to recurve. Best place to start looking for increased power is the exhaust system. Header and a free flowing exhaust work wonder for 460s like yours. Stay with a good flowing single exhaust for that low end torque you're looking for. I'm impressed with the Banks Power Pack, but it's pricey. Advance initial timing to 12 degrees helps. You will need to pull the spout plug before setting the timing.

Richard
 

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Discussion Starter #5
All EFI 460 have the straight up timing gear/chain set. Nothing in the dist. to recurve. Best place to start looking for increased power is the exhaust system. Header and a free flowing exhaust work wonder for 460s like yours. Stay with a good flowing single exhaust for that low end torque you're looking for. I'm impressed with the Banks Power Pack, but it's pricey. Advance initial timing to 12 degrees helps. You will need to pull the spout plug before setting the timing.

Richard
The exhaust system is done. No more cats and the exhaust pipes come together to a single 3" pipe all the way out. That's why I'm leaning toward major modifications like cam and milled heads.
 

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The exhaust system is done. No more cats and the exhaust pipes come together to a single 3" pipe all the way out. That's why I'm leaning toward major modifications like cam and milled heads.
You have headers as well?

The 88 to 92 EFI engines have E7TE cylinder heads with a small 1.980" intake valve. This severely restricts intake flow and breathing.

Installing the typical 2.084" valve used in all other truck and passenger car heads is worth 20 cfm. We utilize the 2.110" ferrea intake valve in all of our EFI crate engines and top end kits. This levels the playing field between the first and second gen EFI castings.

All EFI engines are a true 8.5 to 1 static c/r. I've measured unopened engines countless times to verify this. Raising static c/r to 9 to 1 by either decking the block or heads or a combination of both will work. Any more static c/r and you risk detonation in 87 octane fuel especially when loaded.

The later 93+ EFI pistons have a taller compression height and larger dish. We use them exclusively except for high altitude higher compression combinations.

Unfortunately the EFI 460's are under powered when doing heavy towing. Because they can not generate enough torque in closed loop operation they typically operate in open loop at or near WOT when heavily loaded. The fuel mapping is lean for emissions considerations running in the high 13's to low 14's which is hard on exhaust valves and manifolds and hurts power. An adjustable FPR will help get the WOT AF's near the lower 13's which will offer better torque. Note that if you frequently run heavily loaded this can incur a MPG penalty. When in closed loop operation it is a non issue.

We have striven to develop engine combinations that operate in closed loop under heavier loading to maintain fuel economy with good results.



SJ
used 2b RHP



:D
 
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