ben790450

Alright guys lets break out the knowledge here. Im just thinking that instead of a 4.6 stroked out to a 5.1 and then a 4V conversion it might just be more cost effective to get a 5.4 4V. Does the lightning 5.4 have forged internals? Cant you just use cams, head, etc from a 4.6 for the 5.4? Im just thinking that a 5.1 stroker is going to have some thin walls even with forged internals and thats not good for a nitrous injected twin turbo application. . . . .. Any info would be helpful guys. Thnx

ben790450

Well SHM sells a 5.4 4V lightning long block with forged internals and FR sells a 5.4 4V crate motor but its a navi motor. Maybe i should get the long block. What about the computer though. I dont think my 2v 4.6 computer will work with that will it. . . .

ben790450

I found these guys selling slightly used lightning motors:
http://cgi.ebay.com/ebaymotors/99-to...QQcmdZViewItem

But are lightning forged internals? Will a 5.4 4V handle 600 to 800+ hp?

rjgstang

it will only be honed out about .020 over. the mod motors use a iron sleeve that is pressed into the cylinder so dont worry much about thin cylinder walls.

ben790450

Yeah but dont you think its just easier and more practical (and torquer) to use a 5.4 than a 5.1 stroker. . . .

Matts00GT

No a lightnings internals are not forged. Supposed cutoff point is around the 450rwhp mark. If you wanted more than that, youd have to rebuild it. However, the Lightning is still a 2 valve.

So yes, the heads and cam would work on it. You'd def. need a new hood though. More so than just a regular 5.4 swap. Read up on Project Frightning from MM&FF. They took like a 79 model stang and put a lightning motor in it. Theres probably a write up somewhere.

ben790450

Huh ur right a lightning motor is a 2v. . . . well ford sells full navigator crate motors for $4,395.00 (http://www.fordracingparts.com/crate...eplacement.asp) with a beautiful 9.5:1 compression ratio which is nice and low for FE so maybe if i bought a rebuild kit for that with forged rods, crank, pistons, send in the heads and intake to be ported and polished and then bought 4 custom ground cams would be the best way to go. Does anyone know what kind of TB they use and if they have upgrades? I wonder if a lightning MAF would be adaptable?

korn253

do u mean bored out, when u stroke in engine u put different cams and cranks in it to make the stroke longer

ben790450

Ya. . . but thats besides the point. Its bored and stroked.

Matts00GT

It may have a low compression ratio, but it still wont hold up the power. The best way to go is simply rebuild the 4.6 with a forged rotating assembly. It will be the easiest and the cheapest and it will be very strong. What's wrong with 650rwhp?

What really are your goals with this build? Are you wanting forced induction through a turbo or supercharger? Or are you going the nitrous route? I doubt you're going N/A bc it sounds like you want a lot of power.

Its nice to have 1000rwhp goals but eventually you have to face the music. Unless you have deep pockets, you need to rethink some of your plans. Personally, for a street car all I would want is 550-650 rwhp. Anything more than that and it just wouldnt seem that fun.