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What springs with Lunati 60303 voodoo cam? #1518679 10/17/13 12:05 AM 10/17/13 12:05 AM
Joined: Jan 2003 Posts: 1,221 Jarrettsville, MD T tywebb2 OP super gas
tywebb2 OP super gas T Joined: Jan 2003 Posts: 1,221 Jarrettsville, MD	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. '72 440 Cuda 11.673 @ 115.91 w/1.663 60'

Re: What springs with Lunati 60303 voodoo cam? [Re: tywebb2] #1518680 10/17/13 09:22 AM 10/17/13 09:22 AM
Joined: Aug 2010 Posts: 343 S.E.Mich D drew72 enthusiast
drew72 enthusiast D Joined: Aug 2010 Posts: 343 S.E.Mich	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.

Re: What springs with Lunati 60303 voodoo cam? [Re: tywebb2] #1518681 10/17/13 12:25 PM 10/17/13 12:25 PM
Joined: Jul 2004 Posts: 19,317 State of confusion T Thumperdart I Live Here
Thumperdart I Live Here T Joined: Jul 2004 Posts: 19,317 State of confusion	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. 72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....

Re: What springs with Lunati 60303 voodoo cam? [Re: tywebb2] #1518682 10/17/13 02:00 PM 10/17/13 02:00 PM
Joined: Feb 2011 Posts: 4,302 Nebraska 72Swinger master
72Swinger master Joined: Feb 2011 Posts: 4,302 Nebraska	Call Mike at MRL Performance, he will know exactly what spring to use with that cam. Mopar to the bone!!!

Re: What springs with Lunati 60303 voodoo cam? [Re: tywebb2] #1518683 10/17/13 02:32 PM 10/17/13 02:32 PM
Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually B BradH Taking time off to work on my car
BradH Taking time off to work on my car B Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually	Shimming is a band-aid; please put some "real" springs in there and be done with it.

Re: What springs with Lunati 60303 voodoo cam? [Re: tywebb2] #1518684 10/17/13 02:55 PM 10/17/13 02:55 PM
Joined: Jan 2003 Posts: 13,367 Marion, South Carolina [><] an8sec70cuda I Live Here
an8sec70cuda I Live Here Joined: Jan 2003 Posts: 13,367 Marion, South Carolina [><]	I strongly suggest you call Dwayne Porter (fast68plymouth) and get some springs from him. Dwayne is the man when it comes to this stuff. CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax

Re: What springs with Lunati 60303 voodoo cam? [Re: BradH] #1518685 10/17/13 03:22 PM 10/17/13 03:22 PM
Joined: Jul 2004 Posts: 19,317 State of confusion T Thumperdart I Live Here
Thumperdart I Live Here T Joined: Jul 2004 Posts: 19,317 State of confusion	Quote: Shimming is a band-aid; please put some "real" springs in there and be done with it. 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. Last edited by Thumperdart; 10/17/13 03:28 PM. 72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....

Re: What springs with Lunati 60303 voodoo cam? [Re: Thumperdart] #1518686 10/17/13 04:53 PM 10/17/13 04:53 PM
Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually B BradH Taking time off to work on my car
BradH Taking time off to work on my car B Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually	Quote: ... If the springs are shot or you`re trying to make any spring work then of course not. That's my point, not that you can't "fine tune" a spring's preload w/in a certain level by the installed height. But if you're working w/ used springs that only had 120#s closed when new, have fatigued to 110#s after some use, and the new cam really needs 140#s, "You can't get there from here!"

Re: What springs with Lunati 60303 voodoo cam? [Re: BradH] #1518687 10/17/13 05:00 PM 10/17/13 05:00 PM
Joined: Jul 2004 Posts: 19,317 State of confusion T Thumperdart I Live Here
Thumperdart I Live Here T Joined: Jul 2004 Posts: 19,317 State of confusion	That too was my point........... 72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....

Re: What springs with Lunati 60303 voodoo cam? [Re: Thumperdart] #1518688 10/17/13 06:02 PM 10/17/13 06:02 PM
Joined: Jan 2003 Posts: 11,713 Portage,michigan B B3422W5 I Live Here
B3422W5 I Live Here B Joined: Jan 2003 Posts: 11,713 Portage,michigan	Doing it right the first time almost always has long term benefits 69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, 10.40 @127 1/4 1.41 best 60 foot 6.60 at 103.90 1/8

Re: What springs with Lunati 60303 voodoo cam? [Re: B3422W5] #1518689 10/17/13 07:42 PM 10/17/13 07:42 PM
Joined: Jan 2003 Posts: 1,221 Jarrettsville, MD T tywebb2 OP super gas
tywebb2 OP super gas T Joined: Jan 2003 Posts: 1,221 Jarrettsville, MD	I took the springs to a shop today and the measured very close to eddy spec. 125# @ 1.885', 285# @ 1.385, 330# @ 1.285. Guy at the shop said I need a double spring with the voodoo cam. I called Mike at MRL per advice here and he was super helpful. He recommended a beehive spring part# 74820k1. It is rated 155# @ 1.880, 340# @ 1.380. I also tried calling Dwayne for his advice but the phone was always busy so I didn't get through. '72 440 Cuda 11.673 @ 115.91 w/1.663 60'

Re: What springs with Lunati 60303 voodoo cam? [Re: B3422W5] #1518690 10/17/13 11:26 PM 10/17/13 11:26 PM
Joined: Jul 2013 Posts: 561 USA B B3RE mopar
B3RE mopar B Joined: Jul 2013 Posts: 561 USA	Quote: Doing it right the first time almost always has long term benefits Mike Beachel I didn't write the rules of math nor create the laws of physics, I am just bound by them.

Re: What springs with Lunati 60303 voodoo cam? [Re: B3RE] #1518691 10/27/13 04:33 PM 10/27/13 04:33 PM
Joined: Jan 2003 Posts: 1,221 Jarrettsville, MD T tywebb2 OP super gas
tywebb2 OP super gas T Joined: Jan 2003 Posts: 1,221 Jarrettsville, MD	Just got done putting everything back together this morning after installing the beehive springs Mike at MRL recommended. They did the trick. The Cuda spins up to 6K without a problem now. Thanks again for all the help/advice. '72 440 Cuda 11.673 @ 115.91 w/1.663 60'

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