Need More Oomph
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Logistics Pro
Joined: Feb 2011
Posts: 3,522
Likes: 11
From: Townsend, MT
Need More Oomph
What I've got is a '66 F250 4X4 that I built a 410 for. Current specs/mods are as follows:
9.2:1 compression
4.080 bore (technically a 416)
Elgin E-966-P cam SPECS
C4AE heads harden seats, stock valves
ARP rod bolts
Oiling mods
"T" code 4bbl intake
670 CFM Holley
Sanderson headers into 2 1/2" dual straight through exhaust (magnaflows)
It runs good, lots of power, pulls hard, etc. It seems that of late though, I have found myself hooked onto a trailer more and more often. It does well, and will out pull most of the stock diesels until you get up into the early 2000's range. That being said, I need more. Most people tell me to just get a new truck, but I have had a couple of newer trucks but end up selling them because I prefer Old Green.
So what's the best way to go about getting more snort out of my FE? I don't know where I am at power wise right now but I would like another 50 to 100 horsepower and ft. lbs. of torque. Since I use it to tow, The best place to have that power would be between 2 and 4 thousand RPM.
What are my options? Better heads and intake? Stroker kit? Is what I am asking for even feasible from an FE?
My first thought was a diesel swap but something about the FE's just turns my crank.
9.2:1 compression
4.080 bore (technically a 416)
Elgin E-966-P cam SPECS
C4AE heads harden seats, stock valves
ARP rod bolts
Oiling mods
"T" code 4bbl intake
670 CFM Holley
Sanderson headers into 2 1/2" dual straight through exhaust (magnaflows)
It runs good, lots of power, pulls hard, etc. It seems that of late though, I have found myself hooked onto a trailer more and more often. It does well, and will out pull most of the stock diesels until you get up into the early 2000's range. That being said, I need more. Most people tell me to just get a new truck, but I have had a couple of newer trucks but end up selling them because I prefer Old Green.
So what's the best way to go about getting more snort out of my FE? I don't know where I am at power wise right now but I would like another 50 to 100 horsepower and ft. lbs. of torque. Since I use it to tow, The best place to have that power would be between 2 and 4 thousand RPM.
What are my options? Better heads and intake? Stroker kit? Is what I am asking for even feasible from an FE?
My first thought was a diesel swap but something about the FE's just turns my crank.
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Joined: Jul 2002
Posts: 42,561
Likes: 423
From: Long Island USA
<p>What rear gear ratio do you have? When towing, it's all about torque-to-the-ground. If you went from, let's say, 3.73 to 4.10, that's a 10% increase in torque to the ground all across the board. (4.10 divided by 3.73 comes out to 1.099 - that's 109.9%, hence the 10% (rounded up) increase I'm talking about).</p><p>Wow, this says you have 3.54s? https://www.ford-trucks.com/forums/1...has-begun.html - nice tranny, BTW 
</p><p>That's a pretty high gear for the highway when towing.</p><p> </p>
</p><p>That's a pretty high gear for the highway when towing.</p><p> </p>
Thread Starter
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Logistics Pro
Joined: Feb 2011
Posts: 3,522
Likes: 11
From: Townsend, MT
What rear gear ratio do you have? When towing, it's all about torque-to-the-ground. If you went from, let's say, 3.73 to 4.10, that's a 10% increase in torque to the ground all across the board. (4.10 divided by 3.73 comes out to 1.099 - that's 109.9%, hence the 10% (rounded up) increase I'm talking about).
Wow, this says you have 3.54s? https://www.ford-trucks.com/forums/1...has-begun.html - nice tranny, BTW
That's a pretty high gear for the highway when towing.
Wow, this says you have 3.54s? https://www.ford-trucks.com/forums/1...has-begun.html - nice tranny, BTW
That's a pretty high gear for the highway when towing.
I was originally going to swap to 3.54's after I put the five speed in (that's the reason I put the five speed in so I could still have a low first) but I liked the way it ran and pulled with 4.10's so I just never got around to swapping in 3.54's.
I don't think I would want to go any lower as I still occasionally make a run on the interstate and 80 MPH is almost 3600 RPM as is. That, and with the closer gears in the five speed, I can just shift down.
It is set up to tow well and it does. I just want a little more...
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 423
From: Long Island USA
<p>Ah well, it was an idea. We get this question in the v10 forum a lot - the answer almost always is, change the gearing. You've already done that </p><p>The exhaust valves you have in those heads are 1.560"? The 1.650" CJ-size exhaust valve will definitely help, and maybe a slightly bigger carb, the intake would probably help as well.</p><p>But asking for up to 100HP and 100ft/lbs of torque is a tall order. Without radically changing the torque curve (dropping the low RPM power), I'm not sure you're going to get there.</p><p> </p>
</p><p>The exhaust valves you have in those heads are 1.560"? The 1.650" CJ-size exhaust valve will definitely help, and maybe a slightly bigger carb, the intake would probably help as well.</p><p>But asking for up to 100HP and 100ft/lbs of torque is a tall order. Without radically changing the torque curve (dropping the low RPM power), I'm not sure you're going to get there.</p><p> </p>
Thread Starter
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Logistics Pro
Joined: Feb 2011
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From: Townsend, MT
Ah well, it was an idea. We get this question in the v10 forum a lot - the answer almost always is, change the gearing. You've already done that
The exhaust valves you have in those heads are 1.560"? The 1.650" CJ-size exhaust valve will definitely help, and maybe a slightly bigger carb, the intake would probably help as well.
But asking for up to 100HP and 100ft/lbs of torque is a tall order. Without radically changing the torque curve (dropping the low RPM power), I'm not sure you're going to get there.
The exhaust valves you have in those heads are 1.560"? The 1.650" CJ-size exhaust valve will definitely help, and maybe a slightly bigger carb, the intake would probably help as well.
But asking for up to 100HP and 100ft/lbs of torque is a tall order. Without radically changing the torque curve (dropping the low RPM power), I'm not sure you're going to get there.
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Logistics Pro
Joined: Jan 2011
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From: Antelope Valley ,CA
I am a little busy at home now installing all new base boards . but I'll try running your engine on DD5 this weekend to see what she's making HP/TQ i'll post results .
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Thread Starter
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Logistics Pro
Joined: Feb 2011
Posts: 3,522
Likes: 11
From: Townsend, MT
Wow, those are some impressive torque numbers but I thought horsepower would have been better.
Any chance you could run a longer (4.375") stroke after the heads and intake? I really appreciate your time.
Any chance you could run a longer (4.375") stroke after the heads and intake? I really appreciate your time.
