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FE Power Forums => FE Technical Forum => Topic started by: fastback 427 on April 27, 2015, 12:51:15 PM

Title: edelbrock 5906 valve spring set up
Post by: fastback 427 on April 27, 2015, 12:51:15 PM

We have a set of c4 g heads we are setting up for a 64 gal with a  performer rpm cam and intake. Running 390 with d2 heads, rpm intake and cam. The d2 heads have stock springs. The c4 heads are fresh stock rebuild. Ordered springs from summit, they sent 5906. The exhaust spring is shorter than the intake, and is to be used with a rotator to offset the difference?  I have never seen a rotator on any of my stuff. What are my options? Any help appreciated.

Title: Re: edelbrock 5906 valve spring set up
Post by: jayb on April 27, 2015, 02:47:51 PM

I wouldn't use a rotator, just shim the springs so they are the same.  Sounds like you will have to shim the exhaust more than the intake.  What are the spring specifications?

Title: Re: edelbrock 5906 valve spring set up
Post by: fastback 427 on April 27, 2015, 03:28:59 PM

The uninstalled heights are  2.19 and 2.06.  They are asking for a 1.82 intake and 1.68 installed height. Seat pressure 85-95.