Honestly at the moment I have no idea... whatever came stock lol .

 

What would u recomened with my truck 08 fx4 8inch lift 35/12.50/18 4.56 gears

 

i got 4wd on 33" tires on 18" wheels not going to change those in the future but i am planning on getting a box camper i would say the projected weight will be around 3000lbs at the most? and maybe towing a motorcraft boat as well. i still want to haul *** when i got those on the back but would also be nice to get the tires spinning alittle when not hauling.

 

Skip the Roush. To my knowledge they use the old Eaton design, not even the newer TVS design. Whipple is still the best. There is an ongoing debate as to which supercharger, Whipple or TVS is better. You can't go wrong with both, but if you go with the old Eaton design you're really limiting yourself.

 

While that's true the Roush blowers are going for cheap right now. For someone not looking to exceed roughly 420rwhp on the stock block this is a great option. For $3650 and about 6-8hrs labor you can have 370rwhp with the Roush kit and an otherwise stock truck. That's hard to pass up. However you can also pick up used Whipple and Saleen kits for the same if not less money and have more power and of course the ability to build upon it. I prefer the Whipple hands down. I'm not impressed by Saleen nor the the TVS. While they are efficient blowers neither can match the Whipple.

 

Great you've already taken care of gearing. For you I would say pick your blower and (I prefer Whipple) decide how much you want to spend vs power you want to make. Your stock fuel pump should keep up with 8psi but due to the weight of the wheels and some additional aero push being lifted I would recommend a fuel pump upgrade if and when you go to 10psi.

Wow lots of weight lol. Sounds like some fun weekends with a boat and camper. Good for you! I would never advise you to exceed 8psi on your stock block since you will be using the truck for towing. The blowers make great tow assist and it's actually what the Whipple was set up for. What we have to look at here is irristable force vs an immovable object. Your immovable object is at times going to be a lot heavier than others. You don't want to increase your boost and fuel (irristable force) to the point something breaks. So it sounds like your expectations are reasonable. Stick with 8psi and consider the fuel pump upgrade as well. More work equals more heat and the PCM will add fuel to bring down exhaust temps before things get ugly. If your stock pump is maxed out delivering fuel for power then the engine can't get the additional fuel the PCM is commanding to cool off the combustion chamber. Exhaust gas temps rise and you get a melted valve. Not telling you this to scare you. It's just better you be informed and make a decision about the fuel pump. I would say do it. Also see what gears you have. Hopefully you are 3.73 or higher. Also make sure you have the tow package.

To both of you. Your sc kits will come with what's needed to get you up and running which includes t-stat, spark plugs (gap them at .030) belt, tune, and injectors. Note the Whipple kit uses the stock injectors and a tune that raises fuel pressure to compensate. This is approved by Ford however I strongly disagree with it. Get some 39 or 42lb injectors. For any kit the tune that comes with it sucks. Spend $600 and get a custom tune with and SCT programmer. Jdm or Troyer are the top picks for tuning. The typical Mustang tuners do not know our transmissions and you will lose a trans due to improper settings. Especially with the heat you guys will generate with the weight your moving. It sucks that no one is making a good performance valve body anymore. however these guys can give you tunes to keep things safe and fun whether your towing, off roading, or daily driving. Here is a link to a fuel pump upgrade. I wish they had these 2.5 years ago. Would have saved me a lot of money. http://www.fuel-pumps.net/fordf150fuelpump.html
Now that's the must do list. Keep in mind things like long tube headers, true duals 2.5", and efans can help get strain of the motor and heat or exhaust away from the motor faster. These are beneficial but not must haves unless you start pushing for big numbers.

 

I have 3.55 gears. Would i be alright with those? but it would only be a matter of time till that went. Yea I do have the tow package, made sure of that.

 

The 3.55's will work, that's what I use to have coupled with 32" tires. However with the 33" tires and the weight you will be at I would suggest 4.11 or 4.56 regardless of whether or not you supercharge. You will make the trans life and job much easier not to mention better throttle response.

 

Brother, you and your truck is the shiz! Thanks for all the great info, it makes me want to join the Whipple gang myself. I'm not sure what kind of supercharger Saleen uses but if it isn't a Whipple, I'll keep mine normally aspirated.

To the original poster, certainly these Roush blowers are bloody cheap considering what you're getting, but for me this is the way I see it - no amount of money is worth having an excessive amount of heat in the engine bay for an obsolete forced induction system. The newer TVS and the twin screw Lysholms are the way to go. It's like comparing older, inefficient turbochargers to newer scrolling, variable geometry turbochargers. I'll stick to the newer technology. Also considering the time invested and how forced induction is generally a permanent upgrade, I'd spend the extra money and get the Whipple.

 

k i will look into getting a 4.11 and start pricing that out. i know your all about the whipple but i'm able to get a deal on this supercharger http://www.s281motorsports.com/c=sFQ...arger-Kit.html for pretty much half the price. but i will ask if he can also get a deal on the whipples as well.