I was wanting to offset grind my crank, but I"m a little worried about strength. I am shooting for 400hp and shifting around 6000-6500rpm. Where is the safe limit? What do you think is pushing it? I would like go to a 2.000 journal, but not if it risks a catastrophe.

It will be fine. You won't be the first to do it.


Lawrenceville, GA

What Charlie said!  I have ground both 292 and 312 to 1.888". 

   God Bless.   Tim                           http://yblockguy.com/

350ci Y-Block FED "Elwood", 301ci Y-Block Unibody LSR "Jake", 312ci Y-Block '58 F-100, 338ci Y-Block powered Model A Tudor

tim@yblockguy.com  Visalia, California    Just west of the Sequoias

Here are links to a prior thread discussing strokers and offset grinding.  Doing a search on this site for offset grinding or stroker cranks will net some more information regarding the subject.

http://www.y-blocksforever.com/forums/Topic27324-3-1.aspx

http://www.y-blocksforever.com/forums/Topic27324-3-2.aspx

Lorena, Texas (South of Waco)

I'm still considering offset grinding the journals on my 312 to 292 crank.  It has newly turned .020 under rod journals, so it looks like a stroke of 3.50 would be the result after grinding for 2.10 sized rods.  The matching of rods and pistons however is a total blur.  Need some steering here.

Mike, located in the Siskiyou mountains, Southern, OR 292 powered 1946 Ford 1/2 ton, '62 Mercury Meteor, '55 Country Squire (parting out), '64 Falcon, '54 Ford 600 tractor.

Hi   Dig up issue #66 of your Y-Block magazine......Jerry C. has an article explaining the basic requirements. I had to read it a few times to get a handle on it...length of a new rod and comp. distance of a new piston and decking the block for fine tuning,  aiming for that zero or nearly so, deck height. Availability of pistons with the right bore size and compression height is the limiting factor. John Mummert has a selection that uses Eagle rods..... hope this is of some help.   Barry L

Thanks for the ref. to issue 66.  My stack doesnt go back that far so will order it with the subscription renewal.

This probably isnt going to happen, but it would be great if I could find a 2.10 big end rod the same length as a 312 rod that uses a proper size bushing.  Then a replacement flat top piston would be very close to the right position.  My problem is not knowing the options in rod lengths and their piston pin diameters, plus the same with the pistons.  I've tried pulling up some of the sites of makers referenced by Ted in one of the previous threads but havent been able to get the information, at least not yet.

Edit:  Finally have a number.  Scat -2-350-6250-2100 .  6.250 L, 2.10 journal, 927 pin, ARP8740 bolt.  $450.  With the length being only .002 shorter than the 312 rods, the piston location should be very close to even with the deck if my thinking is correct.  Now need to find something similar that is about $100 less.

Mike, located in the Siskiyou mountains, Southern, OR 292 powered 1946 Ford 1/2 ton, '62 Mercury Meteor, '55 Country Squire (parting out), '64 Falcon, '54 Ford 600 tractor.

Those SCAT rods will have chev wrist pin sizes unless you have a set specially made.  Cheapest way may be to hone the pistons to sbc pin size and use sbc pins, shortened as needed.

John - "The Hoosier Hurricane"

What about honing the small rod end for a Ford bushing, or would it weaken the rod too much?

Mike, located in the Siskiyou mountains, Southern, OR 292 powered 1946 Ford 1/2 ton, '62 Mercury Meteor, '55 Country Squire (parting out), '64 Falcon, '54 Ford 600 tractor.

'46:

Good point. 

John - "The Hoosier Hurricane"