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Pop N Wood · 01-10-2009, 09:21 AM

Not to start an argument, but I would think hard about mechanical vs. vacuum secondaries. I got this off the Holley website

Plus mechanical secondaries are one more thing to tune. Maybe not a problem depending upon your experience, but it is an added complication.

I have a 750 DP with mechanical secondaries on my 6.0, 440 HP LS2 motor. The idle circuits on the DP are way too rich for my stock cam. The DP I have seems to be meant for a more aggressive cam. Proving to be a learning experience for me anyway.

01-10-2009, 09:21 AM	#8
Pop N Wood TECH Enthusiast Trader Rating: 1 Join Date: May 2006 Posts: 525	Not to start an argument, but I would think hard about mechanical vs. vacuum secondaries. I got this off the Holley website Plus mechanical secondaries are one more thing to tune. Maybe not a problem depending upon your experience, but it is an added complication. I have a 750 DP with mechanical secondaries on my 6.0, 440 HP LS2 motor. The idle circuits on the DP are way too rich for my stock cam. The DP I have seems to be meant for a more aggressive cam. Proving to be a learning experience for me anyway.