FE displacement
Thread Starter
|
Post Fiend
Joined: May 2004
Posts: 5,277
Likes: 0
From: St George, SC I-95
FE displacement
If I am reading my manuals correctly a 390 Fe had a Bore of 4.05 and a stroke of 3.78. What would be the displacement if I were to put a 428 crank in this motor. From what Ive read a 428 has a stroke of 3.98. If I am doing the math correctly it should be something like a 410. If you put a 428 crank in a 427 you better get ready for a wild ride but is this worthwhile in a 390. However, dont want to have to machine the block for the rods to clear. Give me some suggestions. I am building this motor to put in a 79 Ford F250 4x4 so I want alot of bottom end torque.
FE "Freakin Expensive"
Joined: Dec 2003
Posts: 6,461
Likes: 4
From: Smith Mountain Lake, VA
That would be a great motor to build, you can even take your 390 out .030 with a 428 crank you would be making a 416 out of it,, add a nice cam and headers,a nice aluminum Intake and your making some good HP, and plenty of torque for your 4X4
And the change in the 390GT would be more compression,heads,intake,exaust manifold ,Cam... Compared to the truck 390...
Good Luck..and keep us posted on your build! Russ
And the change in the 390GT would be more compression,heads,intake,exaust manifold ,Cam... Compared to the truck 390...
Good Luck..and keep us posted on your build! Russ
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
If you think spending $400 for a used 410/428 crank, add in another $200 or so for balancing is a good deal in increasing the torque the motor puts out by 25-40 ft/lbs is a good deal, then by all means do it. otherwise that 390 will put out all the torque your 4x4 will ever need. By the way you were correct in the 410 cid displacement, Ford did this back in the mid to late 60's with the Mercury 410. Before the recent jump in prices on used 410/428 cranks and the associated disappearance in the J'yards, the 410 swap in a 390 block was a good deal, not any longer is this true. If you happen to have a 410/428 crank fall into your lap for cheap, it would be a different story, but this scenario is happening less and less everyday.
Senior User
Joined: Apr 2004
Posts: 198
Likes: 0
Im doing the 410 currently. The crank (DSC used) was $400. My 390 rods didnt look good so I also bought reconditioned rods (DSC reconditioned lrg bolts) $190. The 410 pistons (cast) $88. the internal balancing (not completed yet) $300-400. External balancing was only $175 but I wanted internal. If you go external balancing you need a 428 flywheel.
