Whats better,grinding a crank or line boring?

needsaresto said

Thanks for that Cracked. Now the question is can I get the K1 crank in a drop in form? Fit right into the 400 block and has the 3.92 stroke?

I always thought the reason I would have to clearance bearings is because of the rolled radius added in for strength when grinding. Apparently there are no 400 main bearings that will fit this radius,thus the "hacking",lol.

Click to expand...

No, on the mains there is no radiused bearing, the reason for cutting it is because the chinese choose to FINISH grind their cranks the last .002 with flipping SANDPAPER . The reason to HACK bearings is because the crank journals are TAPERED and the RADIUS is TOO big. They have the exact same problem with the 440 sized mains . The only bearing that needs to be bought with a radius is the rod bearings and they are now making those bearings NARROWER and you may STILL have to HACK on them for a CCJ crank . :toothy10:

Like I said the Eagle is have is radiused and it fits in the run of the mill low deck bearing , just like a $3000 Callies does.

If you want to save money buy the cheapest 4340 material crank you can find and then send it to your local crank grinder and have it cut .010/.010.

Yes you can get a K1 that will be a drop in and have the counterweights sized so you don't have to make them look like SWISS CHEESE.

Where in canada are you ?