v10 dyno numbers
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Junior User
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v10 dyno numbers
hi i have an 03 v10 f250 6 speed looking to put headers on it. but need some more convincing dose anyone have like proof in the gains or the better fuel mileage storys. please tell me your guys experiences on them??
Lead Driver
Joined: Nov 2008
Posts: 8,449
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From: South Jersey
Banks use to have long tube headers, long tubes are the only type that will show gains, shorty headers are completely pointless. I have a set on my 5.4 and they did nothing but lighten my wallet! I do now that 4.6 and 5.4 show improvement only when a set of long tube headers are installed (mustang and lightning dyno charts)
Why the need for power? are you towing or do you have larger than stock tires? If so tell us what OEM gears you have, GEARS are the only real improvement that you feel and see on the 5.4 and V10 motors in Super Duties
Why the need for power? are you towing or do you have larger than stock tires? If so tell us what OEM gears you have, GEARS are the only real improvement that you feel and see on the 5.4 and V10 motors in Super Duties
Super Moderator
Joined: Aug 2003
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From: Isanti, MN
You're not going to see any fuel economy gains, that's simply a tactic to sell parts. There's not much restriction at the RPMs and engine loads that most of us operate at. If you drove around all day long at wide-open throttle you may see a small efficiency boost. But that's about it.
New User
Joined: Aug 2014
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I replaced my cracked stock manifolds with stainless Gibson headers, see link below. Mileage on my 05 F250 5.4 was between 12 and 12.8 MPG[1]. After the swap I did hit 13.8 MPG once, but every other fill up has calculated 12 to 12.8 MPG[2], just like stock.
I have no dyno graphs to quantify any changes in power delivery. Butt dyno says there isn't much power difference. There was a bit of an increase in exhaust note though, nothing rude, just a bit more volume at 3k RPM and below (where I spend most of my commute). Above 4k RPM it is considerably louder than stock.
5.4L Gibson SS Header
6.8L Gibson SS Header
[1]milage on OE plugs that had 122k miles, OE manifolds, and OE battery
[2]calculated with new Autolite plugs, SS headers, and a new Optima battery
I have no dyno graphs to quantify any changes in power delivery. Butt dyno says there isn't much power difference. There was a bit of an increase in exhaust note though, nothing rude, just a bit more volume at 3k RPM and below (where I spend most of my commute). Above 4k RPM it is considerably louder than stock.
5.4L Gibson SS Header
6.8L Gibson SS Header
[1]milage on OE plugs that had 122k miles, OE manifolds, and OE battery
[2]calculated with new Autolite plugs, SS headers, and a new Optima battery
Hotshot
Joined: Jul 2013
Posts: 14,256
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if you want more power you need to up the compression and do some cam work. 6.8's have lower compression ratio than 5.4's and theres probally a good reason for it. So while you have the heads off to replace the pistons to higher compression ones, re-cam, and change the valve spring strenth, do better on the gaskets becuase that probally part of the reason why the 6.8 has a lower compression ratio than the 5.4
so yes, after you do some engine internal work, will intake work and exhaust work pay off, probally, but not likely if thats all you are going to do.
before you take the motor down, measure your oil PSI and decide if you need to do something to the oil pressure while you have the pan off.
so yes, after you do some engine internal work, will intake work and exhaust work pay off, probally, but not likely if thats all you are going to do.
before you take the motor down, measure your oil PSI and decide if you need to do something to the oil pressure while you have the pan off.
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Junior User
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i have 35s and 3:73s its just like pulling hills here in pa 4th is screaming but as soon i i shift in OD its falls on its face i was looking into headman headers because the factory exhaust well ill just say my garden tractor has a bigger exhaust than it haha i run 93 octane most of time and keep the rpms under 3k because i feel there not capable of it but i know there good for some revs like 5200 i was reading on the one rv forum
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Lead Driver
Joined: Mar 2013
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From: Kent Station, WA
Before sinking money into the cat back check into the SPD y pipe and 5 star tuning.
I currently have the y pipe and MBRP cat back. It does sound awesome however not sure if horsepower or mileage improvements. My best was 13.5 with a full bed of camping gear, family of four and a seadoo in tow.
If your search for some of WE3Zs posts he has done the Banks headers, 5 star tuning and 4.88 gears with his 35s and has shown improvements towing his 41' camper. His is pretty much a dedicated tow rig though.
I currently have the y pipe and MBRP cat back. It does sound awesome however not sure if horsepower or mileage improvements. My best was 13.5 with a full bed of camping gear, family of four and a seadoo in tow.
If your search for some of WE3Zs posts he has done the Banks headers, 5 star tuning and 4.88 gears with his 35s and has shown improvements towing his 41' camper. His is pretty much a dedicated tow rig though.
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Junior User
Joined: Oct 2014
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As of now im gettting 10mpg on 93 i was thingking of doing the y pipe. How do you like your mprp? loud not i want something with a little rumble but not an annoyingly loud so its not annoying when towing stuff. Do the tunes really gain much?
Hotshot
Joined: Jul 2013
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with a 9.2:1 compression engine, you will get no power diff between 87, 89, or 93 octane. you need to get to 10.5:1 compression ratio to benifet from 93 octane.
93 octane in a 9.2:1 engine is going to cause a lot of carbon deposits.
93 octane in a 9.2:1 engine is going to cause a lot of carbon deposits.
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Junior User
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well i run 93 in every thing cause they have sales where its the same price as 87 and i have heard 87 is the junk fuel with dirt and grime from the other 89 and 93 fuels didnt pass with so that why i run it not for the power i dont believe it changes any anyhow
Super Moderator
Joined: Aug 2003
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From: Isanti, MN
I'd show you some third party sources that confirm what we've told you, but you'd ignore them. After all, they're on the internet.
