Blown Flathead V8 Part III

[salazarich]

this is a good motor for my roadster

[blownflathead]

The center main is a weak point but not as wimpy as some think. Drag racing loads only last for a few seconds which makes the job easier. I use a mild steel center maincap, ARP retaining bolts, Clevite 77 bearings and Valvoline VR-1 20W-50 racing oil. It all seems to work. The redline is 5800 rpm.

[68enxy]

My first car, a 1953 Ford, had a 239.4 flathead V8. The problem I had was while driving wide open, 86 mph. I lost oil pressure and then the center main spun, broke the bolts and cap and then the bent crankshaft started hitting the block. To it's credit, I drove the poor thing for three weeks with no oil pressure until I could find a replacement engine. This was in 1966. How do you keep the crank bearings in this engine?

[Turbojeep23]

love the way that sounds. flatheads sound great and so do superchargers.

[zhoudunyi]

That does sound great. Long live the flatheaders.

[blownflathead]

The engine uses a Roadrunner Engineering "Big Kahuna" supercharger kit with a Roadrunner manifold and a Weiand 174 blower.

The engine has a heavy duty steel center maincap.

[flatheadaus]

I*d be interested to know what type of intake manifold you used?Did you make a girdle for the main caps?full or centre only.Cheers ,Flathead Mike Australia

[markal774]

In a class all their own huh? Love it.

[Bulldog466]

Flatheads are cool.

[LashoutUK]

That's a fantastic bit of kit! Great engineering!

[princewilliam7764]

Well I do have a 1948 Ford Flathead out of a Truck, Complete with a Tranny and Radiator, 239 CID, with a 4 Speed Toploader Im gonna put it in a little car, maybe a 1932 Ford, I dont know I love Flatheads,