What springs with Lunati 60303 voodoo cam?

Just curious what valve springs you guys are running with your 60303 voodoo cam. I am running the springs that came in my eddy heads with 105# seat pressure and car is breaking up at 5700rpm. Called Lunati and they recommended a double spring (73124k4), but I noticed the complete kit they sell with that cam comes with a single spring (73815LUN).

Would simply shimming my existing springs to get seat pressure up be a good idea? With a .060" shim I would be at 120# seat.

You only change installed height with shims. Adding shims to raise spring pressure is a no no. It could get you into coil bind. Get the correct springs.

I`ve shimmed em before as long as it doesn`t put you into coil bind you should be fine. .120 seems like a lot and looking back on my heads, I think .040 gave me an extra 20 lbs. iirc.

Call Mike at MRL Performance, he will know exactly what spring to use with that cam.

Shimming is a band-aid; please put some "real" springs in there and be done with it.

I strongly suggest you call Dwayne Porter (fast68plymouth) and get some springs from him. Dwayne is the man when it comes to this stuff.

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Shimming is a band-aid; please put some "real" springs in there and be done with it.

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If it`s a band aid then some bad ass engine builders I know must not know this............is it ideal no but if the springs are close and were run w/that cam successfully and just need a few lbs. to get back to spec. then it works fine. If the springs are shot or you`re trying to make any spring work then of course not.