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Replacing 2.92 Diff - Power / RPM

VEV8

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I have a Berlina 6L Auto with a 2.92 diff. What sort of power gain is expected with a 3.45? Since it's 18% higher, would that be the difference in RPM (at the same speed) or am I off the mark? Basically just asking as a "bang for buck" upgrade and what I could expected.

PS. I did do a search but could not find answers to these 2 question.

Thanks
 

Hangman

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You won't actually gain power. Changing the ratio just changes where the power is ie: top or bottom end.

Going to a shorter ratio will make it launch harder, which will make it feel faster :p, but the trade off is it will rev higher in the top end.
 

VEV8

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I'm sorry. I should have said what sort of "torque" gain is expected, not power gain. My bad.
 

TinSnips

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Even when considering torque, it's not really a 'gain'. You're not adding torque, more redistributing it, if that makes sense. The car will launch harder as said and be able to keep more 'meat' through lower revs - but it will top out quicker, as said.
 

VEV8

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Actually now you guys have explained it, I feel like a d!ckhead. I should have known that. Do you guys think a 3.45 is on the money. ATM I have 325rwhp with just tune.
 

VEV8

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Thanks Juzo. I think a 3.45 is definatley the way to go since it doesn't sacrifice too much top end.
 
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iv also got a ve berlina 06 and i want to put a LSD in it should i just stick with a 2.95 or go to a 3.45 anyone can help me out ?
 
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