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Old 06-22-2006, 12:20 AM
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Tuning a C6?

Ive heard that there is a why to some how tune? or adjust your shifting by either turning the vaccum module itself or using a alen key to turn a "screw" inside the modual . i only ask because i have a 70 cougar with a 417 horse 420 tQ 351C And a new (fresh rebuild) C6 with red eagle clutches stage 2 shift kit heavy duty servo and mabe more .. just cant remember at this moment sorry.. also i have new 3.50 gears with a detroit "nospin" locker 9 inch also running 255 75? 15 inch bfg ta's and steel rims if i hold it to the floor in drive or.. if i start in first and shift at 5 grand should i not be able to slide that mother out goin into second.... i mean come on .... i would think it would get all squirly after shifting with that acceleration ?

Your thoughts and help would be greatly appreciated !

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Old 06-22-2006, 02:41 AM
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if i start in first and shift at 5 grand should i not be able to slide that mother out goin into second

Why would you want to build a car to go fast and click E.T.'s and want the car additionally to become squirrelly and break traction on the 1 to 2 shift?

It is akin to having one that the front end leaves the ground. It may look cool but it really hurts trap times.

Most modulator valves do have an adjustment to adjust shift points, not firmness. That will be in the valve body and pump pressure, and band/servo application.
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