Quote:
Originally Posted by JeffP-Z
Hi Guys,
Been reading this thread and trying to understand all the numbers because I have been thinking about making a gear change as well. I have a 2010 with a 6MT with Stillen Gen 3 CAI, Berk Resonated test pipes, and Ark DT-S exhaust. My diff let got the other night and fortunately for me I already have an appointment to have and OS Geiken 1.5 diff installed. I was thinking of going up to a 3.9 or 4.08 but want to understand if will have the desired effect I am going for, which better acceleration for drag/roll racing performance. It seems like from the info post that the WHP will go down some but the torque will go up. Will this give me that improved acceleration I am looking for or am I misunderstanding?
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OS Giken is a good choice. When my car just had bolt on's, I had 4.08's installed. It definitely helped with low end performance. I feel it's a good upgrade for a car with bolt ons. Once I went forced induction, I went back to the stock 3.69 ratio. First gear became absolutely useless and the lower gearing isn't needed with added power. That's just my opinion.