[greenhornet347]

i have a 351w and im putting a set of afr 205s with a 408 rotating kit.just wanted to know how much power they can support with a girdle.please let me know from experiance..thanks

[thesource]

About 600-700 fwhp pretty safely . Can it hold more , yes . Safely ? can't really say for sure or not .

[greenhornet347]

thats more or less average what i was lookin for.thanks for info

[Ryan_65Stallion]

as long as you build the bottom end strong as you can make it it'll take alot.

[Aerocoupe]

Which block are you using or the better question is what year block?

Darren

[BHAM]

HOW MANY LICKS TO THE CENTER OF A TOOTSIE POP?...ALL DEPENDS ON WHATS IN IT

[Aerocoupe]

greenhornet347,

What 351W block are you intending to you use? This will play a major role in giving you a ball park idea as to what the limitations of the block will be. As BHAM stated the whole combo will play into the horsepower limitation. You could just say for arguments sake that the internals will survive well past the block's limitations. With that you could also ask what a non-roller block (list specific years as we all know the casting technology and metallurgy all play a roll in this through the years), a stock roller block, and for shits and grins you could also ask what the man-o-war blocks and Dart blocks' limitations are as well. Searching the net will provide most of these answers though. Another thing you need to think about is RPM, this is also a limitation of certain blocks. You also need to zero balance the rotating assembly with the larger cubic inch motors as a rule of thumb. Not 100% necessary but it will definitely help.

Darren

[greenhornet347]

its a 84 roller block machined and ready and im deciding on the stroker kit.its prolly gonna be forged forsure

[Aerocoupe]

84 roller block??? I did not think they started making a roller block for the 351W until 1994. I have heard that you can retrofit the 92-93 blocks as they have the bosses in the lifter valley for the spider that holds the roller lifters in place. If you are using a 351W roller block it is the weakest production block out of the 351W family. Ford started using thin wall cast technology with the 302W roller blocks to save cost in casting the blocks. This bled over into other castings as well. From what I can tell everyone looks for the 70-74 blocks as they have more meat and use a roller lifter conversion kit. This is not to say you cannot make some hp with the 351W block but it definitely will not handle what the older blocks will.

I have a 94 351W block in my T-Bird but I did not stroke it and only went 0.030" over. It also has a SVO crank, good rods, and pistons with good machine work i.e. balanced, torque plate, line honed, etc. Most likey around 400 rwhp and the guy that put it together basically told me he would beat me if I ran more than a 150 shot on the bottle. I am sure there are guys out there making more hp with one but it all a gamble as these blocks were not very consistent material wise when they were cast.

Darren

[BHAM]

there was no roller block in 84

[thesource]

Yeah 94 was the first year of the roller block . The block is an F4TE .

[greenhornet347]

i went with a 418 and will learn how to put my first shortblock together and its a 90s rollerblock sorry for confusion

[thesource]

Just make sure your clearances are within spec and you should be fine .