NBM-LS1

iTrader: (7)

I have PAC 1205 in my heads I am going to run and I noticed that the spring diameter is larger than the previous springs I had in my heads. The problem is that the rockers already barely rubbed on my previous retainers.

I know for a fact that they will interfere with my new 1205 and Ti retainers.

I was wondering if anybody knew what rockers will work with these wider springs.

The spring diameter is 1.304"

Thanks boys!

vettenuts

iTrader: (4)

Don't grind the rockers as you would be grinding in a very highly stressed area.

I think PAC makes a valve spring keeper that will shift the retainer down by 0.050". Not sure if that will buy you enough clearance or if your setup can tolerate the reduced installed height that results from lower the retainer. You could set up the seat/retainer with check springs and figure out how much clearance you need to gain. May help with alternate rocker selection as well.

NBM-LS1

iTrader: (7)

Brought back.

I just got my heads and rockers in the same room now. The rockers indeed rub on these new springs. Anybody have any idea on some rockers that will clear?