pistons for PSI

[NO SLO PK]

Well retarding the timing reduces power, and noticeably. At some point, you're better off reducing boost instead or decreasing compression.

A lot of blower guys will set initial timing at 14 degrees, but use the MSD6BTM to back off timing under boost. This gives the best of both worlds...crisp response at low rpm and detonation control under boost.

If you have an intercooler/aftercooler, you typically won't need timing retard.

Hope this helps.

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Russ L
'91 LX
Procharger, 3 row intercooler, extrude honed Cobra intake, Mac full Length Headers, 30# inj., 73mm C&L, 75mm tb, E303 cam, 289 rods, ported E7 heads, MSD, T-Rex w/255 lph Walbro, 5 lug conversion, Cobra R wheels, 3.27 gears and Moser Axles.