hey guys im pretty new to the site. i have a question i cant find much info on.
I have a mustang throttle and ported plenum. i also have a intake manifold for one. my question is.... is it worth the swap for my f150 to the mustang manifold and throttle body? has anyone done this? im afraid of losing some low end but maybe i will gain some good hp?

 

the truck maifold is the best.

 

I had my throttle and plenum off the other day and was comparing the manifolds and it just looked so restrictive. i know the long runners help the low end but the mustang mani couldnt hurt could it

 

actually the mustang manifold will hurt your performance.

 

do you care to elaborate. would it be from the loss of low end or the computer have trouble with it? just want to understand this a little better since the older 5.0 and such would swap the intakes

 

I dont have the info that someone else could tell you, im sure they will chime in soon, but the truck manifold was designed for torque. there was a test a while back, where the truck manifold out did the mustang across the entire powerband.

 

thats good to know...well i though maybe i had a freebe mod but guess not

 

Since the throttle body sits farther back and is mounted sideways compared to the truck, I am almost positive that there are clearance problems since cowl is so low, and the junction block is right in the way. The intake i have been looking at is the edelbrock 4.6L victor jr EFI and getting a sullivan performance elbow, which allows you to use a cobra/lighning tb, but it requires a 1" carb spacer to clear the alternator(they don't tell you though).

 

rmadison, I'm assuming you have a 4.6?


If anybody runs across that test please link it, I'd like to see it. The 4.6 PI Mustang intake isn't at all designed to high rpm power, they make a very flat torque curve down low and peak under 5k rpm, it may shift the power curve a little bit but a torque converter or gears will make that a moot point.


Planning on shifting at 7500 rpm, huh?

 

Yea , you wanna stay away from that mustang intake.. I remember that test Joey

 

Turbo

 

Still, planning on shifting at 7k+? Boost doesn't change the laws of physics, you still need to match runner length to intended rpm range for the best powerband.... That really holds true with turbo setups as runner length affects spool time, use an unecessarily short runner and you'll have a softer boost curve down low, which doubles the torque loss.... You can get away with a lot more (like short runners) on a big engine and still have good turbo response, not so much on a 281...

 

manifold is best for 2900 up to 7500, 6500ish is where I am aiming for, and the low torque down low is typical of any 4.6L turbo i have seen. I am building for a 1/4 mile truck so high rpm is my range.

 

If you want to go fast "area under the curve" should be your range.... IMO there are several intakes that would probably be better for that rpm range, but thats just my opinion... Sounds like a cool project, hope to see updates as you go along.

 

Well i'm open to advice, the intake choice is slim because of all the clearance problems. Most of the mustang intakes will not fit under the cowl as far as i know.