[krankieone]

I've just got these heads home and cant figer out the combustion chamber volume fromthe casting numbers

Can YOU help ?

E6SE apears underneath in the valley and 7F15 is in the rocker aera

[krankieone]

I 1.78"/ E 1.45"b pedistal rockers and internal air injection manifold

[Twister]

you have the cursed 1986 H.O. head (GREAT for torque) with 62.9-65.9 cc combustion chambers

[Twister]

krankieone wrote on 11-21-2002 05:40 AM:

I was unable to add this query to the thread for some reason so I was hopeing you could tell me why they are "Cursed" and will they respond well to being polished or aren't they worth spending the time on ,
the motor I build will rarely see much more than 5000rpm

hey there, the problem with the E6SZ heads is the cumbustion chamber is heart shaped and does not flow too much air. The heart shape also causes hot spots on the head and can cause detenation. They are a great torque head and some porting would help, I would not polish the intake ports though. Personally, I like them and have had little troble with them, but they do not like HIGH RPM's.

Twister

[krankieone]

Thanks Twister,
.you kind of confirmed my thaughts about the chamber shape .Out of curiosity why do you sugest not polishing the inlet port?

[Twister]

Krankie, the intake side needs to be rough so the air and fuel will mix better....