Getting Ready to Tune My Ford Expedition Platinum Max 4X4 w/ Tow Package and 3.92 Gears - A Few Questions

Alex Taylor

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Hi there,

I'm getting ready to tune my 2020 Ford Expedition Platinum Max 4x4, 3.92 gears with Tow Package with 22's. It is 400 HP stock and 450 ft/lb torque. My goal is to do this all in one shot and try to get to 600HP/TQ on 91 Octane gas (Arizona only has 91 sadly) so any and all guidance would be appreciated.

Here's what I have for my list to buy is there anything I'm missing?

- 5 Star Tuner & Tunes
- Catted Downpipe
- Whipple Mega Cooler
- Performance TS 160 degrees (I live in AZ so cooler is better in my view)

Questions:

- Should I get better spark plugs for the above set-up? If so any recommendations?
- I currently have a drop in K&N filter, would it be better to get a full K&N CAI or are gains negligible as I already have a drop in filter?
- Bigger Throttle Body? Not sure if they make one or if one is needed so figured I'd ask here.
- Oil catch can?
- Any other mods you'd collectively recommend with peak HP being my goal?
- Are there recommended installers in AZ / Phoenix Metro area that could install all of this for me in one shot?

Lastly is it possible to get to 600 HP at crank with the above or would I need 93?

Thanks in advance to all.

Alex
 

fanningc89

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I'm new to the 3.5 platform but from my experience with a 5.0 f150 i had previously I would suggest staying away from 5 star and had the s&b kit that was really nice. A lot of the mustang guys in my area like bama tunes and another from Florida I can't remember the name of. Catch can for sure should be first mod. I've been told to just stay with oem plugs for simple bolt-ons.
 

apex96

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I'm new to the 3.5 platform but from my experience with a 5.0 f150 i had previously I would suggest staying away from 5 star and had the s&b kit that was really nice. A lot of the mustang guys in my area like bama tunes and another from Florida I can't remember the name of. Catch can for sure should be first mod. I've been told to just stay with oem plugs for simple bolt-ons.
Catch can is not needed on the second gen 3.5 motors as they use port and direct fuel injection. Also 5-Star is a perfectly capable tuner, they maintain all factory fail safes and their tunes are reliable. Also like many other tuners, you can datalog and send the tune in for modification if desired and 5-Star will work with you to adjust the tune to your liking... Modifying or replacing the existing factory cold air intake system is also a waste unless you want to hear more intake noise.
 

Tuck

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I would talk with 5 star or a good mechanic in your area. Adding 200hp to an engine may require some internal upgrades (pistons, rods, cams, etc). Stock components may not be designed to that level of stress and you may not be able to get there with tuning and bolt-on parts alone. I'm not a a tuner or certified mechanic but I would find out the answers to those questions before you stress your engine that much. If I remember correctly when I was looking into getting a tune for my Raptor they told me I could reliably tune that engine (3.5L eco at 440hp) to a little over 500 before I'd have to start looking at beefing up internals. That may have just been the shop trying to get business but it was enough to keep me in the canned tune range below 500hp. There are a number of mechanically inclined people on here who can help you get to where you want to go without blowing up the engine.
 
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