e6 vs e7 heads

[65fastback2+2]

whats the diff?

 

[N8Miller]

e6: you cant pay people to take them
e7: make nice HP when ported. affordable/cheap power.

 

[65ShelbyClone]

E6s have a chamber designed by a crackhead. It is supposed to be "high swirl", but all it does is impede flow. E7s were a big improvement (part of a 25hp improvement which I believe included intake and TB as well)) done in '87.

Bottom line: E7s have potential to make decent power when ported. E6s have the potential to hold down a large stack of papers in a breeze.

 

[90mustangGT]

I used to have a pic with diagram showing the differences. I remember that the main thing was that the valves are shrowded towards the center of the combustion chamber. There is a reason they were only made for a short period of time. E7's are pretty good heads except the small port size and the exaust port was designed by the same crackhead that designed the E6 head, I guess they just didn't have it to fire him. Some porting will take out those problems.

 

[krahkin]

If Im not mistaken, E7s also have slightly larger valves.