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Original Message
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| RE: HP '52/'90 heads |
| By Mike McQuesten - 03/21/2001 3:49:10 PM; IP 206.193.0.120 |
| I want to affirm what Kevin said about the 352/390 HP COAE-D heads. First, they are NOT machined combustion chambers. Those were found on the first 90 days of production for '58 FE engines, 332/352. Those heads are rare and neat but not much performance potential without a ton of work. Now, the COAE-D heads are great for a big compression ratio boost. As Kevin states they'll work well with a little work and dished pistons. The 352 HP did not have dished. The same head was used on the 390 HP with dished pistons. CR was around 11:1 (from memory here). They're main advantage was to make more power with high compression along with all the other goodies in the HP engines, i.e., performance solid lifter cam, improved exhaust and more carburetion. I'm running a set of these heads on a '63 427 equipped with C3J Ford Marine/Industrial forged pistons. They're dished similar to the '61 390 pistons. This way my '60 HP looks like a stock HP 352 but lurking underneath are those tell tale cross bolts. My builder/ machinist calculated my CR to be 10.5:1 which is exactly what I wanted. Oh, and we did fit the 1.66" CJ/lo-riser '27 exhaust valves into the tight confines of that little figure eight combustion chamber. |
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