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Old 08-15-2020, 11:56 AM
Steve C. Steve C. is offline
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Join Date: Dec 1999
Location: Liberty Hill, Tx. (Austin)
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Just a fwiw, it would be most interesting to make a phone call and try to get a hold of a Lunati tech rep who is somewhat familiar with Voodoo hyd roller lobes used in conjunction with a Pontiac valvetrain mass. Then ask him what he recommends for a spring pressure. Again not just stating from their catalog recommendations.

From the Lunati catalog, two springs stated for the 20510711 Voodoo cam:

73195 spring / dual
Rated 115 lbs at 1.700"
1.050 coil bind

74895 / Beehive
Rated 137 lbs at 1.700"
1.040 coil bind.

Obvious a lower pressure at a higher installed height and further from coil bind at max valve lift. But even installed at 1.700" I don't think I would want to run a Voodoo hyd roller lobe with 115 lbs spring pressure. This knowing that Paul Carter with actual dyno experience has recommended 130-135 lbs using a 30 degree valve seat on a Voodoo hyd flat tappet cam.


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