Fobra

Thats the kicker ... worth the money power... for big power N/A your driving the wrong brand.

Eagle2000GT

Not all displacement is the same. I would rather have 3.7" bore with a 3.54" (stroke (a big bore with stock stroke) than a 3.55" bore with a 3.85" stroke (a 4.6 stroker). I've read posts from people who are taking big bore 5.4s and destroking them.

Fobra

This is true, but its ok as long the rod/stroke ratio is alright. 1.6 or better. The destroking is a way to keep the cubes up a little bit, but turn 10k rpm. For example on a turbo motor when you can build your engine in a way that takes advantage of the mechanics of that kind of rpm.

offthewall158

Maybe Im wrong, maybe displacement is different on a modular motor, I just dont see why though. I figured it was all the same. (sorry for my ignorance, by the way) If I plan to supercharge my motor will it be worth the money to use a stroker kit or is it still pointless?

Fobra

Your not "wrong" your just overlooking the significance or insignificance I should say, of the stroker kit, because your not adding that many cubes at a pretty substantial cost and your losing the favorable "square" rod/stroke. So in short, yes its pointless, just starting boosting. But if you want the most you can get out it, use a 5.4 (but incidental costs go up, like new and expensive intake etc.) If i had to prioritize... 1) Forced induction of some kind 2) Head and Cam work 3) 5.4 bottom end. It just depends on your goals because its obviously cheaper to build the 5.4 to start with, rather than build the 4.6 and then decided to upgrade to the 5.4

Eagle2000GT

Displacement isn't different on mod motors. It's just mod motors have a small bore and a long stoke. The old small block Ford and Chevy motors had a 4.0" bore. Our is 3.55". It is so small that it shrouds the 2v valves. That's why after all these years there aren't very many aftermarket heads for mod motors. Patriot's stage III heads require the cylinder to be bored .020" over. For comparison the LS1 has a 3.9" bore. Ford overcame this by using 3v and 4v heads. Ford's new Coyote motor has a 3.63" bore and a 3.65" stoke (keeping things square). If I remember correctly the 6.2L motor will have a 4.16" bore.

Edit: The old Chevy 283 had a 3.88" bore and a 3.0" stoke. The old Chevy 350 had a 4.0" bore and a 3.48" stoke. My Chevy 454 has a 4.25" bore and a 4.0" stoke. In all cases the stroke was shorter than the bore.

offthewall158

If I plan to supercharge my motor will it be worth the money to use a stroker kit or is it still pointless?

GTRACER88

IMO for a supercharger its not the best route. I would advise against it unless you like to spend money. Superchargers need RPM's to make the power... means you want an engine that will spin faster that will net you the results you want. On the other hand if you decide to go turbo, the stroker kit will benefit you significantly!

Eagle2000GT

+1

People have done it but according to my tuner (also an engine builder) it's counter productive. He said its hard to talk someone out of stroking their motor when the cost difference is so small between forged 4.6 internals and a forged 4.6 stroker kit.

I'm not planning or rebuilding my motor right now, but if I were I would get just 4.6 forged internals and have them balanced to spin to 7000 rpm. Then get supercharger cams and springs to match. I would have it bored .020" over to open up the valves a bit more.

But if my motor goes I'm leaning more to a complete 3v motor swap.