I have a 2009 F150 FX4 with the 5.4l 3v and im trying to find out if I would have to upgrade any of the internals I order to install the Department of Boost GT450 supercharger kit that’s good for 450 rwhp on my truck. And im also wondering how much hp and tq the stock 2009-2010 5.4l 3v engine and trans can safely withstand.

 

this is usually a pre-purchase conversation


- why would you buy this partial setup, over a complete kit????


- who’s tuning the truck? and has this individual given you any input???
- what fuel setup are you going with?
- what MAF upgrade?
- what intercooler setup?
- how do you use the truck?


stock internals have been proven to hold 500rwhp for years and years with a good tune (yes requires a reputable truck tuner) / supporting modifications / maintenance

transmissions - also require supporting mods (shift kit and trans cooler)

 

I have not ordered the kit yet but if you go on their website it shows that you can add the necessary parts that are not included in the kit to your cart for an addition price. The use of my truck is pretty much standard daily driver use not really used to haul or tow anything on a regular basis. It says on their website that I can use the cooling fans from the 2013 Shelby gt500 and they have a few different intercooler systems to choose from. Here’s the link. https://www.departmentofboost.com/pr...harger-system/

 

I have followed that DOB setup since they were originally taking pre-deposits a few years ago in the 11th gen FB group. I think from what I recall reading not too long ago, there were still parts you needed to source. The big thing you're getting is obviously the intake manifold for the blower.

To Jereme's point, the problem is now most of the three valve support is gone with the exception of ProCharger and Edelbrock. Both of which are super expensive. I remember in the early 2010s where some of the guys paid less than $4,000 for the Whipple kits.

I'm entering the years where I'm finally going to be able to think about forest induction for my '04 that I've had for many years. But there's just not a lot of options and the department of boost kit requires some modifications for fitment and sourcing parts. Not a big deal to some. I'd just like complete kits when it comes to that stuff.

It might be worth adding up what you'll have into it and then weighing the cost of the Edelbrock or ProCharger if you haven't done that.

Good luck

 

And just add, I wouldn't think there's anything you'd have to add per say if you're keeping low boost levels. But I would be hesitant to install any blower unless I had redone all of the timing and upgraded the oil pump if the miles are starting to get up there.

 

yes im going to replace all the timing components as well as upgrading to the melling high volume oil pump. also going to put new roller followers/ rocker arms in it. It’s got 124,000 miles on it but the O-ring on one of the chain tensioners has blown out so every now and then it has the chain rattle on start up. But the DOB kit includes new injectors, but not the fuel pump. but I believe for everything I can get additional on their site, that the kit doesn’t include the total cost was about $4,600 minus the cooling fans and fuel pump the have a intercooler option that they say should work just fine and options for tuning listed on there site. My main concern is if the stock engine and trans internals will withstand the 10 to 12 lbs of boost for the 450 rwhp. I do know the stock 2009 5.4 3v is rated from factory to have 310 at the crank. But it’s the additional power on the stock head gaskets, rings ,bearings, and pistons if they would hold up under those conditions with the added boost from the supercharger?

 

I would peruse this supercharger section on the site. Look up twinskrewd (I think his username is) in particular. Over the years he and a few others who I can't fully remember their usernames, would discuss the mods they did. One guy was widji and iron something or other. Lots of excellent post by them over the years.

I think you might need some upgrades for that power. But if you think back to the ROUSH trucks, those were around 400 to 450 CRANK horsepower. So they were into the 300s at the wheels. A lot of those guys ran long tube headers which took off some of the boost PSI. You're probably okay but just look at some of the cooling upgrades that those guys had to see. You're going to have an advantage with the six-speed transmission which I think is stronger than our 4R75E's.

At the end of the day, it all comes down to someone doing a solid tune who knows these trucks. Not just a Mustang tuner. That'll determine the safety of your engine I would argue almost as much as anything else.

 

I looked up the DOB kit again. Without adding any other options it's $6,000. At that point to me it seems crazy not to look at the Edelbrock for just a little bit more. It says the DOB does not include the intake, and I believe you have to modify the cowl area for some fitment behind the blower.

Usually the out of box kits you are fine without upgrades to the engine running their stock tune. And even if you have it revised by a skilled tuner on a dyno to refine it and get a bit more power, you're usually right within the range of not needing those upgrades.