maroon88iroc

I have a H/C/I/Nitrous C5Z it runs between 10.3-10.5 pretty consistently at 135 mph in the 1/4 and 6.7 at 105 in the 1/8. I use a 26" tire currently.

friend of mine has a 4.10 gear c5z dif and wants to go back to stock gear. would the 4.10 benefit me at all? I am thinking it would help when racing on motor (around 430 hp) but probably hurt when on spray (close to 600 hp)

need some advise if I should make the swap or not

robz

I agree with your assessment.
Figure out what you will do most.
Nitrous or not?
You can also easily calculate rpm thru traps to confirm things.
If you're not going thru several hundred rpm above peak hp you're giving up et.

kirk tarrant

4.10 is a lot of gear with a m12 box. its already about 3.90 in 1-3 gears will be closer to 4.75 with 4.11

GARY2004Z06

You are always better off with 4.10s for an N/A setup when drag racing these late model Vettes. As for rpm through the traps, check using a calculator as Rob suggested. You could always use 28" tires on spray if your calcs prove the necessity to do so.