i have an 01 with a 4.6 with an auto trans. i have add a bbk 75mm throttle body, ported the elbow to 75mm, high flow intake, short tube headers, true duals with an h-pipe and will be adding underdrive pulleys and a chip. i had the truck dynoed for the chip. i only put out 189 rwhp and 235tq. the guy running the dyno said that with auto trany the dyno is not right on the numbers and can only be used as a bench mark for other mods. they said i has something to do with the drivetrain and torque converter. does anyone know if this is true? if it is, does anyone know any type of adjustment to my numbers that will be more read world numbers. maybe some formual. thanks for any info that will help me.

furrby

 

Yeah, the converter and the tranny eat up a good bit of power. You hear numbers of 20-30% or more lost, but I think 20% is probably pretty close for a factory auto. Manuals are less at around 10-20% depending on the type.

 

so is that with the chip or without?

 

that is with out the chip. i dynoed it for a custom tune on the chip. it sould help the fuel delivery for the tb, headers and h-pipe. i my dyno it again after installing the chip. i just do not know if it will be worth the 50 buck to have it done again.

furrby

 

The dyno numbers are right on. Ford rates the 2001 4.6L at 260HP & 350Torque measured at the flywheel. There is an average 30% loss thru the drivetrain back to where the rubber meets the road or the dyno. (260HP x .7 = 182HP) (350Torque x .7 = 245Torque) After the mods and chip I would definitely dyno again. If you don't get the HP gain the chip maker says you have 30 days to return it. I did cause the $400 Superchips 1715 made my '97 5.4L run lean and ping very noticeably at WOT which is where the HP is so I'm suppossed to burn the tops of the pistons every time I hammer the throttle? Got my money back in 7 days. Good Luck

 

A Superchips 1715 will not cause ping unless there is some unusual condition causing it.

For instance:
1. Long tune headers, X-pipes and H-pipes all throw off the oxygen sensor reading.
2. Poorly designed or untested intakes causing the MAF reading to be wrong (usually when turbulance or an unusual bend is added).
3. Aftermarket MAF sensor no properly calibrated for stock (there are some out there that have been as far off as 20%!).
3. Poor premium fuel quality. In some states this can be a problem. For instance, California has borderline fuel (91 octane while most of the nation uses 92-93). Compound this with oxygenated fuel in some metropolitan areas. If you get ping under these conditions switch fuel brands and run the premium tow tune instead of the premium non-tow tune.

 

Wow, when did Ford introduce a 260HP 4.6 in the F150s??

 

GaryJ,
Check this link. Says that there is a 4.6L rated at 260HP and another at 231HP.
specs/engines.php
I was wrong about the 30%. Should have used 22% loss per the next link.
http://www.dynoperformance.com/search_details.php?ID=421
(231 x .78 = 180HP) (293Torque x .78 = 228Torque) So, Furrby's dyno numbers are right on for a 231HP 4.6L not the 260HP version.
I learn something every day.

 

Ken,
I know you are trying to stand up for our sponsors, but if a product doesn't work for you the way it's advertized then you should take it back. Actually the way Superchips treated me was very good and shows that they are a very respectable company and will treat you right.
Also, shorty headers no X or H pipes, well designed AirRaid intake with smooth bends, 2 year old Ford MAF recently cleaned with electronic parts cleaner (no touching) and I'm stuck with Calif 91 octane. I found no change in normal driving performance between the performance tune, tow tune and stock tune unless I hammered it and left it scream thru the gears pinging all the way. Not an option for me.

 

Sorry, those specs are wrong. Even today, the 4.6 in the F150 is only 231 HP. They obviously used the same power specs for the 4.6 as the 5.4 (take another look, the 5.4 is actually correct). Here are some more reliable specs:

https://www.ford-trucks.com/specs/2001_f150_1.html

http://www.fordvehicles.com/trucks/f150/features/specs/

You think they would have downgraded in power over time?? I don't.

Oh, and FWIW, there was a 260HP 4.6 in the Mustangs for a few years and maybe some other models, but never in the F150.