4r70w guys, rear gear question

[static74]

I'm trapping at 146-147 now, and with a 28" tire at my redline. I'm wanting to turn the car up a little more and see a faster trap speed, but I'm out of rpm with a 3.55. Anyone go from a 3.55 to a 3.27? What kind of differences did you notice?

 

[badcobra]

Your converter sounds too loose. What RPM are you seeing at the stripe?

Run this calculator
Wallace Racing - Converter Slip Calculator

 

[static74]

Your converter sounds too loose. What RPM are you seeing at the stripe?

Run this calculator
Wallace Racing - Converter Slip Calculator

Ran the calculator, 0% slip. Seeing 6300 at the trap. Overall, I'm curious how the car will build boost and pull on the lower gear, and how it will effect my ETs.

 

[badcobra]

How can you be out of RPM at 6300? A higher gear will likely slow the car down. What cams and intake?

 

[static74]

its where my tuner has suggested that i shift for reliability. im pushing the power limit of my internals. stock cams and mach 1 intake.