I'm thinking about going F/I, with either a (twin) turbo/supercharger setup, but I figure I need forged internals before I get into that. I've only got 64k, but with forged internals, I don't see my engine quitting for a long *** time. I'd like to do the internals and geteverything situated and broken in before I toss a blower on there in the future. My questoin is, if I want to go F/I, running like 11psi, what all do i need to do as far as forged internals go. I'm a pretty mechanically inclined person, I just don't have a whole lot of experience but I'm doing lots of research and reading. I figure either way, whether I go F/I or not, with forged internals my engine will be ready to handle it, or will last forever if I stay NA.

So, what all do I need to prepare my engine for F/I, and where can I get the stuff. I figure I might as well do things like bigger injectors/rails while I'm in there, so what else woudl be done with the engine torn down? I'm just trying to gathre information. It may or may not happen this summer, but I want to know exactly what I'm getting into before I go drop money on one thing, and then find out its useless because I can't afford to finish the job.

 

If you're doing internals you might as well go for the 4.2L parts and get a little extra power. Supporting mods needed for the f/i are injectors, fuel pump and full exaust.

 

There is still only one type of forged internals kit for sixers, or at least to my knowlege there is, and it's sold by ssm. The other site is www.rpm-mustangs.com and they can also hook you up with all the fuel stuff as well.

 

Cheapest route to beefed up internals is to find a Super Coupe set up. If you want more displacement find a 4.2L crank. theya re tough. And by tough I mean nobody has broken a cast 4.2L crank yet.... with over 700 flywheel hp being the top number to this date.

The down side is that a good blower set up with feature low compression pistons. They won't be the best performers for you in an N/A set up. But just keep thinking long term.

 

yeah, I'm thinking long term. I'm either gonna go big or go home, and I'm gonna go big. What would happen if I put in a 4.2 crank, would that increase my displacement to 4.2L? Is there enough room in the stock block for that? If I did go with a 4.2 crank, would I need to get forged internals for a 4.2, or still for the 3.8?

 

You might need to clearance the block for the 4.2 crank but all the other parts will be for a 3.8. Like said above you'll need low compression (forged) pistons and shot peened rods and up grade the fuel supply. By putting in a 4.2 crank you are "stroking" the engine ( longer stroke, more displacement ).

 

if I put in a 4.2 crank and forged low comp pistons and rods, and upgraded the fuel supply, would that increase power because it woudl be offset by the stroker, or decrease it because of the low compression.

on the rpmustang site, they only sell kits that have everything, but I figure I could hit a junkyard and get the crank cheaper. Would they sell just the pistons, rings, rods, and bearings without the flywheel and crank, which could be gotten at a junkyard?

I happened to run across this site a few minutes ago: http://www.need-4-speed.com/V6%20Per...e%20Corner.htm

they sell practically everything. They also have a 3.8 forged kit and a 4.2 stroker forged kit. Are their kits as good as the one from rpmustangs, or is it a lesser quality?

 

That's hard to say what your power would be running NA and stroked. I would think you would still gain some low end tq though because you wouldn't be dropping the compression a huge amount plus you would have better flowing heads and cam (you should have those to for FI). I'm not familiar with their stuff but if it's forged it should be just as good. Ask what their warranty is.

 

I read that stroking can also lower the redline of the engine. The redline on my engine right now is 4800. I never really rev that high anyway, I usually shift a little past 4k, so I could lose a few hundred rpm off the top and not notice it.

Damn, a 4.2 V6 is is the same size as the V8 in my moms jaguar, except two less cylinders lol.

So I need to find some forged internals, a 4.2 crank from a 97+ F150, and then I gotta worry about heads and a cam. I'm going on vacation for two weeks, and we're doing lots of driving, so I've got my haynes manual and I'm gonna read the engine teardown/rebuild section a couple times during the trip and see what all I can come up with.

If I did pull a crankshaft from an f150 at a junkyard, am I gonna have to do any clearancing, or will it fit normal? I found some kits on ssm that dont require clearancing, and some that may. How do I know if it will need clearancing or not?

 

after some browsing, I found a setup that sounds really awesome to me.

A 4.3L Long Rod Stroker from ssm, along with all the forged goodies, a stage 3 power pack from ssm as well, with ported upper and lower intakes, new cam, and new heads, and then a procharger kit running 11psi. That woudl cost me somewhere in the area of 9 grand if my estimates were right. I'm curious, how much power would I be running with that much stuff after all was completed, and then dyno tuned? I was thinking somewhere in the area of 450hp, but thats just my guess. Supposedly the power pack adds about 100hp, so then I'd be at 250, plus the stroker kit, dunno where hat woudl put me, and then the blower on top of that, as well as a dual exhaust (duh) and other mods that go with. I'm not going nitrous, so thats out of the question. I'd get too carried away with that stuff, and I'd be refilling once a week. An engine swap is not an option either. I want to keep my engine and see what I can do with it.

I know thats a lot of work, but I've got to start somewhere, and you've got to have a plan in the long run to make it work. I'm not just gonna go out and start buying kits ***** nilly and hoping they work together. Thats pretty much my goal at the moment, just a starting point. Its gonna be a long road to finsih that, but it will be worth it in the end if I complete it. I figure that depending on how hard I work over the next year, that by next summer, I"ll have about enough money for the internals and maybe the power pack. Then I'd go from there towards the blower. I wouldn't be able to stop grinning if I had a 400hp sixxer that whooped GT's all day long.