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Original Message
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| Carb selection for a 390 Mustang |
| By Jeff Tepper - 09/20/2001 12:23:40 PM; IP 198.81.17.169 |
At the very least, I need to rebuild the Holley 600 double pump that came on my car when I bought it. The noxious smell of unburned gas coming from the tailpipes is starting to get to me. Problem is, I've been getting "advice" that a mechanical secondary carb is not the best choice for a street driven car with a C6. Unfortunately, there is no consensus about the best option for me. I've been told that a 600 cfm is plenty big for a 390; I've also been told that I should be running a 750 cfm. I've been told that Edelbrock carbs are great as a set it and forget it carb; I've been told that they are a pain to tune if they aren't just right out of the box. I've been told that Holley is the way to go for power and tuneablilty; I've been told that Holleys require near constant tweaking and the cost of jets, gaskets, etc. can get up there in a hurry.
Recognizing that there are no absolutes here, I'm hoping to get some first hand experience from those of you that have already faced and (hopefully) solved this dilemma. At present, I'm leaning toward a Holley with vacuum secondaries. My apparent choices are the 600 (80457S), the 650 (80783C) and the 670 Street Avenger ( 80670). Any others worth considering?
The engine has a Holley Street Dominator Intake, Edelbrock aluminum heads, Hooker Super Comp headers with Hooker mufflers (2 1/2"), Unknown cam (possibly stock), unknown stall speed (possibly stock) and a shift kit in the C6.
Thanks in advance for any insight.
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