5.1 Stroker

[AaRoN]

I went stroker on my motor build, and really like it.
IMO, the 281 could use a lil more torque down low.

And I agree with that too! This is why I'm considering ditching the lightweight flywheel for the stock one.

how will that help? just curious. i kept my stock flywheel because the aluminum ones can warp when they get too hot, which is what happens in a dialy driver that does alot of road trips. lol.

It will help because the stock flywheel is heavier. The heavier flywheel "stores" more energy. Although (and I'm not sure if I'm even right here), some say that's it's a false sense of torque. So, I honestly am not completely sure if switching back would do any good or not. Probably not as I didn't "feel" any difference with the lightweight one.

 

[Dalamar]

as I understand it - it has to do with rotating mass, it takes more force/torque to get it spinning.

aluminum is supposed to be more peppy, but it has it's pros/cons.
if you're on the clutch a lot, like say at the road course, you might notice it.
on the street? I don't really know, but Aaron says he didn't notice the difference.

 

[AaRoN]

The only thing I noticed was that it was more rev-happy. Not alot but a noticeable amount. I just figured; 1. It would reduce alittle weight and free up some power 2. It would compliment my gears.

 

[MustangChris]

I went stroker on my motor build, and really like it.
IMO, the 281 could use a lil more torque down low.

And I agree with that too! This is why I'm considering ditching the lightweight flywheel for the stock one.

how will that help? just curious. i kept my stock flywheel because the aluminum ones can warp when they get too hot, which is what happens in a dialy driver that does alot of road trips. lol.

It will help because the stock flywheel is heavier. The heavier flywheel "stores" more energy. Although (and I'm not sure if I'm even right here), some say that's it's a false sense of torque. So, I honestly am not completely sure if switching back would do any good or not. Probably not as I didn't "feel" any difference with the lightweight one.

that totally makes sence... to a point...

when the clutch is disengaged and the flywheel is free-spinning. such as at the staging light the kinetic energy created by the motor is translated into potencial energy stored in the flywheel. when the clutch is engaged the potencial energy stored in the flywheel is transfered at kinetic energy into the drivetrain...

the amount of potencial energy stored in the stock flywheel is much higher due to the heavier weight and the larger amount of rotating mass.

Its like spinning a water wheel with fast flowing squirt gun (aluminum flywheel) vs. a slow moving garder hose (stock flyhweel.)

the heavier flywheel will rob power on the top end due to the rotating mass, but it will be minimul due to the fact that it's already spinning. much like the horsepower that is lost at the 300 foot mark when driving an all-wheel-drive car. The motor still has to spin the mass, but since its already spinning its not a terrible waste.

seems to me a stock flywheel is the way to go.

 

[MustangChris]

did that giberish i just up-chucked make sence to anyone else?

 

[AaRoN]

It's been debated. Like I said, I've read and heard that there is no torque loss with a lightweight flywheel. The "loss" is just a false feeling.....well...here.

 

[330CubeGt]

+1 on the 5.4.

but props for wanting to stick with a 4.6... gives you some options on mods that the 5.4 doesnt.

You have every Option on Mods with a 5.4 as you would with a 4.6 the motors are very simular you can still get full bolt ones,cams,headers,pullys,CAI etc.I swaped all my bolt ones to my 5.4 when i first did the swap Now that its blown i no longer have them parts but either way its got more cubes then a stroker 4.6 and when you save up enuff cash after the 5.4 swap you can build a 5.4 stroker

 

[MustangChris]

who makes a 5.4 stroker kit? that sounds interesting :-D

 

[98saleen88]

+1 for the 5.4 stroker kit

 

[DropTopPony]

Back to the original post, probe is a name brand but i'm not a fan of the 5.1 stroker because the do more bore and less stroke. They take the stock cylinder wall out like .065 and thats way too thin on the walls of that block. If you are set on a stroker kit go with Livernois as they seem to have done lots of R&D on it with correct wrist pin size and location etc.

 

[jwyche]

i beleieve its roughly 2000, i was thinking about a 5.4 swap, but sound the thought of having a stroker is always nice, but i already have a set of comp 274 xe (might trade for 278xe not sure yet) along with a ported piheads, and still debating on a type of intake, dont really want to use a stock pi one, actually thinkin of getting a custom fabbed one....

When you decide on an intake, consider the Victor Jr. I got it and a Dragon plenum and 75MM throttle body. The engine is still being built, but I think it's going to be great. When I ordered the Dragon plenum, I didn't take the size difference between it and the Edelbrock manifold, but a Sam O'Rear billet adapter fixed that.

 

[1996mustangGT]

+1 for the 5.4 stroker kit

who makes a 5.4 stroker kit? that sounds interesting :-D

There is no stroker kit. Drop in the entire engine lol.

The 5.4 already has a long stroke, so its not smart to stroke it further. Your only option for extra displacement with that engine is to bore it over, however then you get into the issue of cylinder wall thickness (or thiness lol).

Also as 330cube stated, there are no limiting factors for mods for the 5.4L engine....almost all 4.6L mods will work on a 5.4L.