It won't work. Not using off the shelf rods anyway. The 351 deck height is substantially higher, by 1.3". You'd need a 1.3" longer rod, which would put it in the neighborhood of a 6.4" rod. You could get custom ones made with the right length, but that short a stroke with that long of a rod is going to want a lot of rpm to make power. A roots blower would definately help out with low rpm breathing though. If you're gonna use a 289 crank then just use it in the standard 302 deck height block, you'd save a ton of money and it'll run better.

 

Why not just go 289/302 and turbo it. Good economy and good horsepower.

 

A windsor is just a tall 302 with larger head bolts, the bore is the same 4.00". Like someone said earlier you would have to get custom rods to make any compression at all. If you have the same bore (4.00") and the same stroke (2.87" - 289 crank) then you still have a 289, its just in a block that was a 351 originally.

Im going to go with the aftermarket block option on that one.

 

Without really checking things out yet, I don't think I would have any really major rod problems.... a 6.2" rod is available off the shelf for a 351, this combined with some pistons with the right compression height should be able to get me over this hurdle... The very common 4.00" bore of the 351 opens up piston selection to a plethora of different options for compression height across several brands of engines (many 351 W Ford and GM applications even share the same piston pin boresize (.927)..)....

Not to say that this will be possible utilizing off the shelf parts, (I know the difference in crank journal size is an issue that will require either spacers or a custom crank, so for me the viability of the project would swing on just how much this would cost... ) but I think that the chances are pretty good that I couldmake upan off the shelf rod/piston assembly that would get me damn close to the top of the block with the piston. Of course I have not really checked it out, I am just thinking about this at the moment, but I am thinking seriously...

The reason I am thinking about doing this with the 351 block is primarily due toit's strength advantage over a 302/289 block, I know somewhat affordable aftermarket 302 blocks are available that are plenty strong, but that ain't what I am thinking about now.... (also the rod ratio would be incredible!)

 

Go for it man! Let us know how it works out I've already had my talley wacked, but it sure feels good now[8D].

Another option would be a windsor based 427. Use big cc heads and a roots with the Price Motorsport adapters to run a weiand 174.
http://www.pricemotorsport.com/

As far as I know holley/weiand doesn't make a blower manifold for the 351W. Check out the PME adapters.
[align=left] [/align]

 

IIRC older 289 blocks are stronger than say a new 302, so why not just use one of those, alot less work, and with girdles and such could probably be strong enough to hold what your describing, which i dont think could be much more than 400 hp and maybe 8000 RPM. and when people ask you if its a winsor, you dont have to say, no its a 289

 

I know it's a joke.
A 300 inline six would have more potential.

 

I would disagree that the Windsor is a stronger block than a 302. Spin a Windors to 8k with some decent power and see the block split. It has a taller deck, but is basically the same block. I would seriously consider a Dart Sportsman if you are going to play with hybrids or modifieds or you are wanting to build a bullet proof power plant. [sm=shootshoot.gif] They are good to about 1200hp and although they are more expesive than a junkyard block, they are cheaper than scrapping everything when it blows up. I built a 383 out of the 351 Dart Sportsman block. Man it is solid![sm=smiley20.gif]

 

I didn't want to take the time to read all of the previous posts, but here is my opinion. This is dumb. First of all, a 289 and 351 have the exact same bore, so all of your Unshrouding of the valves/large bore short stroke doesn't exist. All you would have is a long rod 289. This is all pointless. There would be way too many hurdles to overcome (such as not being able to find the correct length rods, and main bearings are completelydifferent)to justify doing this. And the only things you would get out of it would be longer rods and aslightly tougher block (which you don't need due to the fact that 99.999% of all 289s don't make enough power to break a block unless they are on spray). You will be adding lots of weight, and taking uplots of room due to the block's physical size.

As far as Ford and Chevy sharing piston pin size... NOPE. Ford is .912 where as Chevy is .927. The only smallblock Fords that have a .927 pin are the 347s and some 331s. Now, you could possibly have a Ford rod bored out to .927, but you would weaken it in the process since you will be taking out material. I think you will end up spending way more money having custom parts made, than what you could just buy a Dart 302 block for. Sorry if I seem like I am coming across harsh, but it is very clear that the cons outweight the pros by 10 to 1. It would be 100% pointless to try to do this. Can it be done? Probably, but I highly doubt you will end up using any off the shelf parts besides the crank. Should it be done? No. Will you spend lots of time and money? Yes. Could you buy a Dart block for cheaper? Yes. Period.

Sorryif I seem like a dick here, but I have seem people try this stuff before, and 9 times out of 10 it doesn't work. They spend a lot of money gathering parts, get it together, and something goes wrong and it doesn't run or blows up because something was wrong. Most people give up on the project about half way through, after spending a lot of money on parts that won't work. I have only seen one guy do something like this. I think he modified a cleveland crank to fit in a windsor block, used Chrysler 360 rods and Chevy pistons and ended up with like a 402 or something??? He had more money in justmachine work (parts, gas,and time scrounging not included)than what he could have bought a 427 stroker kit for, and the thing didn't run all that great.I just hate to see you waste your time and money on a project that will end up putting you further behind than where you started.

 

De-stroking a motor is most commonly done to fit a larger bore block into a racing class that has a displacement limit. Best example I can think of offhand was the 2.82" (IIRC) stroke that Pontiacused to get their 400 down under the 305 cubic inch limit for Trans-Am road racing.

It´s not that common on the street; the 372 SBC (400 block, 350 crank) is the only one I can think of that is available as a "kit". Most people just want "even bigger".


Norm