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RE: You sure about that 3.93 rear gear? By Gerry Proctor - 03/09/2004 5:40:11 PM; IP 216.40.205.71 Oridinarily, headers won't affect intake manifold choice unless you're building a carefully considered combination (carb, intake, cam, heads, and headers). Headers work very well on a 2v 390 and even better on a more potent engine. Headers tend to improve the breathing of any engine across the rpm range. The right headers can greatly improve the top end but unless you're running 2" primaries, they also help the bottom end too. Now, on to that rear gear... If that's right, that gear is all wrong for a low-rpm torque monster in a Galaxy. For what you're intending, you'd want a gear no higher than a 3.25:1 with 3.0 being closer to ideal. Besides, I don't think anyone makes a 3.93. 3.90, yes; 3.91, yes; but no 3.93 that I've ever heard of. Perhaps you meant 2.93?

This thread, so far...

Skip Navigation Links.  I need an opinion for a 4 barrel manifold for 390 -- Steve M, 03/09/2004  RE: It's hard to beat the Performer for that use. -- Gerry Proctor, 03/09/2004  RE: It's hard to beat the Performer for that use. -- Steve M, 03/09/2004  Gerry, does it make a difference if.. -- Steve M, 03/09/2004 RE: You sure about that 3.93 rear gear? -- Gerry Proctor, 03/09/2004  RE: You sure about that 3.93 rear gear? -- Steve M, 03/10/2004  RE: You sure about that 3.93 rear gear? -- Larry V, 03/14/2004  Larry, my 390 2v setup is going like this -- Steve M, 03/14/2004

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