Soaring

Now, is this response back on topic?

Colorado_Mustang

Yep. Mine is as long as I mention: You should have your crank offset ground whenever it needs machining. It's the same price, adds cubes, adds CR, etc. Though it isn't worth taking down an engine to do this, it's worth while for most rebuilds.

Rorin67

Go Glen FTW!!! You guys crack me up!

Do I dare ask (since I don't know the bore & stroke) what is the displacement of a 351 that is bored .030 over???

Just kidding... really - just kiding...

bgs45504

The Answer is "B"

65Raven65

Actually, not me, I'd like to know. If for no other reason, to irritate! Just kidding.

What is it? and can you do it safely? Thanks

highhilleer

For small block fords, even threw in a couple of stroker numbers. Note a 302 stroked to 347 usually includes a 0.030 over bore.

my77stang

for the record, oem replacement pistons in oversize are destroked so that they keep the compression from getting bumped up and keep them down in the hole if the block was resurfaced. the increase in displacement should add a few pones (and no, the stroke would not have to increase.... its the overall displacement increase that nets the hp gains) BUT because rebuilder pistons will keep your compression from bumping or possibly even LOWER our compression, most likey that 4.5 hp will never be seen - although the freshness of the motor may make it seem like you have a hp jump. lastly, offset grinding isnt really a possibility when a stock crank is getting reground. even at a .010 / .010 grind they are only taking .005 off each side of the journal and thats about what it takes to clean a crank up. heck, many times even that is not enough which is why .020 cranks are a common sight (of course some may have been .010 cranks in a past life already)

highhilleer

How do you change the stroke with the piston? Isn't the stroke determined by the crank? I could see raising the rod pins on the piston to account for decking the block, but wouldn't that leave the stroke the same?