[OZ_872]

Hi guys, i've done some google searching and have come up empty handed. Has anyone experimented with putting a lower intake from a F-150 on their car and just welding up their own "box" style intake???

[StangBanger302]

That lower will not flow enough to justify using a box upper. Just saying...

[OZ_872]

Right, the reason I ask is because the f-150 lower looks similar to like a trick flow lower and that it would move more air than the explorer or cobra lower. Only problem is the upper from the f-150 obviously won't work. That's why I was wondering for the sake of cost effectiveness if a guy could just invest some time into welding a simple box upper for a fraction of the cost of a new one?

[mustanginky]

box upper intakes kill low end torque. if you're going for a max effort 7500 rpm race motor with a blower or turbo, probably a good idea. for an n/a street car, waste of time.

[OZ_872]

Well, my car does have an old school Paxton SN93 blower on it, as well as a few other things. Just fishing for ideas and experiences, thanks for the input, any more appreciated.

[uedlose]

They have been using the truck lower for years nothing new and it is more like the Holley then the TFS as a matter of fact the Holley will bolt right up to it. You can also use the truck upper but you will need a cowl hood to clear that has also been TFS did it back in the late 80s early 90s. they modded one up it looked cool but didnt last long This was the real TFS before Summit owned them. So if you buy a upper sheet metal or other wise for a Holley it will fit the Ford truck lower the Sallens upper also used the truck lower and that is really where the Holley stuff came from they just spun off the Sallen Vortech stuff. Not much that has not been done with the old 5.0 stuff.

[OZ_872]

Interesting, so pretty much any holley mustang upper will bolt directly to the f-150 lower? what about port matching between the 2? I'm still sort of intrigued about welding up a box upper, would be something different and fairly cheap, but if it's going to work for shit i'd hate to put the time into doing it. Another question, what sort of cam is ideal for a boost application? I bought the car with the supercharger on it and was told there was a motorsport X303 cam in it, i haven't seen it with my own eyes though, Thanks

[uedlose]

they made 2 holley intakes one that would bolt to a stock 5.0 lower and then the one that bolts to a truck. Lots to think about when putting a cam in . Like what are you doing with the car. What you want out of it? how much boost are you running? and so on. The F cam is good and cheap for boost also.

[tmoss]

Holley made a lower to replace the stock lower called the Systemax 1 kit tyhat included a cam and used the stock upper intake. The Systemax 2 is based on the truck lower with a Saleen style upper, but Holley improved on both upper and lower. The Ford truck lower only flows about 205cfm stock, but with a box upper that will help keep air speed high and might work OK. The truck lower will flow 250cfm once ported.

[OZ_872]

I'm looking for a really strong street car, it's not a daily driver, gets stored winters and usually only comes out on nice days when I want to play. I'm around 9 psi boost, the X cam any good?

Thanks for the input, any ideas on how the truck lower might match up to GTP heads?

[uedlose]

Originally Posted by tmoss Holley made a lower to replace the stock lower called the Systemax 1 kit tyhat included a cam and used the stock upper intake. The Systemax 2 is based on the truck lower with a Saleen style upper, but Holley improved on both upper and lower. The Ford truck lower only flows about 205cfm stock, but with a box upper that will help keep air speed high and might work OK. The truck lower will flow 250cfm once ported.

That is right it was a lower for a stock upper with the one. I have a truck intake that was ported by JDS out of I think GA it has been welded a lot and then ported even more it is real art work. Dont know what it flows but I am sure it moves a good bit. Then I bought a Holley upper to put on it. I am gone to put it on our turbo car next year since I am gone with a 9.5 deck for the other build.

[uedlose]

Originally Posted by OZ_872 I'm looking for a really strong street car, it's not a daily driver, gets stored winters and usually only comes out on nice days when I want to play. I'm around 9 psi boost, the X cam any good? Thanks for the input, any ideas on how the truck lower might match up to GTP heads?

I would have to look at the specs. on the x cam been a while there are better cams out there. the truck lower would match up on the GT40p heads ok you may talk with Tmoss there and ask him about cleaning it up a bit for you.

[OZ_872]

The Ford truck lower only flows about 205cfm stock

^based on what tmoss said above and what I read on his porting website the f-150, cobra/explorer lowers all flow around 205 cfm? So I would basically be wasting my time doing the lower swap with the only advantage being able to run a holley upper or making my own?

Here are some motorsport cam specs...

Ford Racing Performance Parts

[uedlose]

The X will work but like I said there are better cams out there run it for now and if you dont like it take it out it dont hurt to try it. I would be looking for something with more lobe separation to help retain the boost in the engine. From what I seen the x is like 110 and I would be looking for some thing in the 112-114 range.

[OZ_872]

Thanks, its definitely staying in until I build a different/stronger engine for the car, thats part of the reason why i'm fishing around for cheap and easy mods at the moment