MustangWorks.com : Ford Forums - View Single Post - difference in 85,86 and 87 heads and pistons?

Unit 5302 · 11-30-2001, 09:14 PM

The 85 had dished pistons. The 86 had forged flat tops. The 87 had forged with valve reliefs.

The 86 had 9.5:1 compresion I believe. 1987+ had 9.0:1.

The E7 heads should definately give you some power, but I'm not sure on the combustion chamber size of the 85 heads.

11-30-2001, 09:14 PM	#8
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	The 85 had dished pistons. The 86 had forged flat tops. The 87 had forged with valve reliefs. The 86 had 9.5:1 compresion I believe. 1987+ had 9.0:1. The E7 heads should definately give you some power, but I'm not sure on the combustion chamber size of the 85 heads.