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

7000rpmisheaven · 11-30-2001, 11:14 AM

I know that the stock compression ratio for my 85 is 8.4. I have seen that stock compression for 87 is 9.5. Why makes the difference. Do the heads change the compression or do the pistons. Can I take the E7 heads off an 87 to raise the compression on my 85?

11-30-2001, 11:14 AM	#1
7000rpmisheaven Registered Member Join Date: Nov 2001 Location: germantown MD Posts: 283	difference in 85,86 and 87 heads and pistons? I know that the stock compression ratio for my 85 is 8.4. I have seen that stock compression for 87 is 9.5. Why makes the difference. Do the heads change the compression or do the pistons. Can I take the E7 heads off an 87 to raise the compression on my 85?