Quote:
Originally Posted by 94cobra69ss396
These heads are only two years old and I haven't had a valve job done on them. The angles are what Edelbrock used. The heads are Performer RPM rectangular ports and the seats have 3 angles and the valves have one. I'm sure there is more power in a good multi angle valve job but I don't have the cash to spend on it right now and the valves and seats are in good shape so I just lapped them.
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A 30 degree back cut on a exhaust valve helps the low lift flow. If you going for every little bit of horse power this will help. If not leave it alone. If you have Manley valves, if I remember our conversation correctly, then they should already have all the correct valve angles. I've done SIX angle cuts on my own heads when I had all the gear. But, that's just over kill.
