I've got a question on the Ford 390 cu. in. FE-Series Engine:How far can I Overbore & Stroke (maxium on both) the Ford 390 cu. in. FE-Series Engine (4___ cu. in.),Without having to use Cylinder sleeves & clearencing the Stock Engine Block for the Stroker crankshaft

 

It depends on how thick the cylinder walls are.YOu could bore it to 4.130 if you sonic check it.I got mine @4.090 w/ 4.150 stroke that makes a 436,I think a 4.25 stroke is common up to 445 ci.

 

Go with stroke for your cubes. The few extra cubes you get via max overbore are not worth the risk of too-thin cylinders, which can lead to overheating, and in worst case situations, broken walls.

Several outfits sell stroker kits, google search will turn them up.

 

I've got a question for ya 393STROKER:What Compression Ratio would you suggest using on the Ford 390 cu. in. FE-Series Engine that has been Bored & Stroked to 445 cu. in. w/8-71 Supercharger

 

How long do you want it to last?

An 8-71 is too big for this engine.

These 2 bolt, heck, even the 4 bolt FE motors will not live long under a lot of boost.

6 :1 or 7 : 1 CR with forged pistons for supercharged engine if you are going to run that big a blower.

Someone here runs a blower, can't recall who, but maybe he will stop by with more info.

 

I don`t know. I`m thinkin` conservitive like 85e,maybe 8 to 1. If you want badd check out the 427 Genisis blocks/engines @ Kieth Craft,but you better sort out you chassis first or you`ll never hook up the rear end.

 

Ford only had one 390 engine and it is the FE engine. So just say 390.

 

The reason I was asking about using the 8-71 Supercharger on the Ford 390 cu. in. Engine 393STROKER,I've seen so many Blown (Supercharged) Engines with the 6-71/Twin Holley Carbs or Fuel Injection,And I have something different for the street use,The Ford 390 cu. in. Engine I have is in a 1967-'72 Ford F100 P/U Chassis w/3-Spd Manual Transmission

 

For a racing application, it is important to have a large enough bore for the valves to clear. Edelbrock heads can support 2.25 intake and 1.75 exhaust valves, of which a stock 428 bore of 4.13 will not be enough. 4.170 bore will allow 2.19 intakes and 1.75 exhausts. 427 bore of 4.23 is large enough for the 2.25 intake valves to clear.
For your 390 stick with 2.09 intake and 1.65 exhausts.

 

I see you have been posting a few questions around these forums asking about engines.I have a few questions of my own.What do want to do with your rig?Street strip,quarter mile,bogger?What do you want?Looks,bragging rights?What is your mechanical experience?I have been a mechanic for 20 years and I am building my first dream truck for myself so I am asking many of the same questions of myself,it's allot harder than it seems.One thing about big blowers/superchargers is that they make great power but you sacrifice streetibility and lessen engine life.But it's your rig,and IMHO your wheels are an extension of you.You drive it and no one can tell you what you want.

 

Hey TheWarWagon'75,I'm planning to use the 390 Bored & Stroked to 445 cu. in. for Street use