rear gears

[keegan.martin]

I have a AODE trans and i’m looking to put new gears into it. I want something crazy out of the hole i don’t care about top speed just street racing really, i have heads cam holley sniper efi and refreshed block. I was thinking 4.56, 4.88 or a 4.30 but it’s a 4 speed trans and not sure which one to go with

 

[keegan.martin]

it’s pushing 350ish to the crank, tires i will get whatever i need to get traction

 

[keegan.martin]

also forgot about the 2800 stall converter

 

[manicmechanic007]

4.56

 

[keegan.martin]

4.56

why the 4.56

 

[manicmechanic007]

I have them in mine and like them
I had 4.88 in an old Camaro and was a bit too much
I am going to get another 9 inch carrier and build a 4.11 trac loc just to try them

 

[manicmechanic007]

If you are going racing you may end up with 5.13 or so for the beat trap time
The old saying went like this
You need to be in your top gear at top rpm at the light (trap)
So there is a formula for tire size RPM and gear ratio to get at this number
There is an old book titled "how to make your car handle" that goes into some of these formulas and is a very good read for us car guys

 

[chrlsful]

"...to get at this number..."
on-line gear calculators?

 

[manicmechanic007]

I'm sure the formulas are online by now
Get and read the book anyway