I did talk with SCAT earlier this week and when I asked about the production of the upcoming Y crankshaft, they said it will not be available now until this time next year.

Lorena, Texas (South of Waco)

With 292 mains and smaller rod bearing size, yes.

I think that cast crank can take all abuse what naturally aspired Y can offer without going really high rpm's.
Bad balancing jobs are different story.


Hyvinkää, FI

So I can take a forged 292 truck crank and make a 312 crank out of it?

I don't know when or if the Scat will be available so in the mean time I am having new rods made that are 312 length and width but take a 2" bearing.
This will allow you to take your 272-292 crankshaft to a local crank grinder and have it offset ground to 312 stroke. You will then be able to use off the shelf 312 pistons and make a 312 out of a 292 at an affordable price.
We expect delivery in late June. Rods are 5140 I-Beam with doweled cap and cap screw bolts. The standard rods come with 8740 cap screws and ARP2000 rod bolts will be available.
Although similar to the 318 stroker kit we have offered in the past the new rods will not require widening the rod journal. Not many crank grinders would widen the rod journals enough to fit aftermarket 2.0" journal rods so the process will be much simpler. 
Although off the shelf pistons would not work the new rods could be used with a 312 crankshaft offset ground to 3.60-3.61" stroke.



http://ford-y-block.com 

20 miles east of San Diego, 20 miles north of Mexico

Ted and adding to that, as you know, good 312 blocks are not allways available and lessens these ideas. i think remaking the small main journal 3.44 stroke is commonsense approach.



  AussieBill            YYYY    Forever Y Block     YYYY

 Down Under, Australia

Any updates on these cranks.

62 f100 short unibody 292 big back window massachusetts

While the bearing spacer sounds like a viable option, those main bearing spacers used on the 400 SBC blocks with a 350 crankshaft were problematic from both a fit and heat transfer aspect.  As a result of that, there was a special ‘thick’ bearing that became available for that application but those were exorbitantly expensive compared to a standard thickness bearing.  If there was enough demand, a special thick bearing could be manufactured to put a 292 mained crankshaft in a 312 block

Lorena, Texas (South of Waco)

On my end, the demand for 312 main journal crankshafts is low.  From a manufacturing standpoint, the additional machine work required to take the journal size down for a casting that is made for larger journals is time consuming and therefore more expensive from both a labor and equipment standpoint.  If it was a case where the majority of crankshafts being sold were large journal rather than small journal, then it would make sense to simply machine a small journal crank from a large journal casting when needed.  But for the more popular small journal Y cranks, it’s the other scenario which would simply drive the costs up for the more popular small journal crankshafts.

Lorena, Texas (South of Waco)

Ted: I have a question? Maybe I'm missing something here but, if Scat is only going to make the 312 stroke cranks to fit the 272-292  main & seal size dimensions,  couldn't a full 312 dimension crank,( refferring to the mains & seal area), be cut or ground down to fit a 272-292 block? If so it would cover both situations?. 


Paul