Print Page - 400 top on a 250 bottom end

Title: 400 top on a 250 bottom end
Post by: vmx1963 on October 16, 2003, 08:19:44 AM

I've heard that the 1974 400 engine is virtually the same as the 250 except for the top end, does that mean you can mate a 400 crank, piston, cylinder & head to a 250 bottom end? Just one of the things that goes through my mind when I can't sleep!!

Title: 400 top on a 250 bottom end
Post by: imported_n/a on October 16, 2003, 08:53:10 AM

Greetings to you down under!

I had heard that the engines were virtually identical, so I tried to fit a 400 top end on a 250 bottom and found the studs are not in the same position, nor is the stroke the same. Good question, though.

Welcome to POG.

Glenn

Title: 400 top on a 250 bottom end
Post by: vmx1963 on October 17, 2003, 05:50:02 AM

Thanks Glenn, as we say down here "bugga"... I was hoping to make a 400 somehow.

Penton Owners Group

General Discussion => Penton Talk => Topic started by: vmx1963 on October 16, 2003, 08:19:44 AM