curtisad

iTrader: (4)

I am going to change out my stock 3.23's to a 4.10. What can I expect from a 1/4 mile time difference and in my MPH. Also would changing the gears make me spin more or less? I currently don't have a traction problem. (MT ET street pros are the bomb!!)

any comments would be greatly appreciated.

FirstYrLS1Z

iTrader: (4)

When I went from 3.23s' to 4.56s',it was a consistent gain of .46 1/4 mile. A stock street car with some suspension mods. Didn't run the 4.56s' for any specific purpose. Needed to rebuild the 3.23 rear(carrier bearings). Since I work on rears and had a housing,a set of used 4.56s',and all the other parts needed,why not. Ran the 4.56s' for 4 years. The 3.23 rear is back in,the 4.56 rear is going back in when weather warms up,and gonna build a 4.10 rearend.
4.56s' with an A4 was a wicked 1st and 2nd gear on the street,but that was with a TCI 2800 convertor. Looking forward to the 4.56 rear going back in with the current Yank SS3600.

RPM WS6

iTrader: (3)

With an SS3600 already in place, the ET difference shouldn't be huge. I'd expect no more than about two tenths of ET reduction, assuming you can get equal traction. As a comparison, 3.23 to 3.73 is worth no more than one tenth of ET reduction with a 3500+ stall speed already in place (4L60E/LS1 combo).

Traction will indeed be more difficult with the 4.10s.

BOLO

iTrader: (40)

If I recall, I probably gained up to 5/10th in the 1/4 mile back in the day going from 3.23/2800 stall to 4.10/4000 stall.