Low gear set 904, pro’s and Con’s
Giving some thought to maybe installing a low gear set when tranny gets freshened.
cars weighs 3350, always hooks, has what I consider a lazy 60.
yea or nay?
Years ago my dart ran like 11:70-80 et.
15x32 slick which was overkill for the car, but like yours it always hooked but had a lazy 60ft of 1.80+
Over the winter I switch from the 727 with 2:45 gear to a 2:74 904 with 4600 turbo action converter, same as before.
A bit more camshaft lift from .580 to .630
Lift.
No other changes. First pass the car ran an 11:22 with same mph as before the changes.
60 ft was 1:52, so I would say that the low gear in the right combination can make big improvements. Keyword is combination.
I have seen plenty big slick big block fairly heavy cars run a 2:74 with 4:56-4:88 rear gears with a 30-32 inch slick works really well. My theory on a big tired car is that the motor can’t get up on the tire with 2:45 and the 2:74 adds more torque.
The only drawback with my car, was that it did not alway hook after the changes.
I have switched to Caltracs and double adjustable shocks to add tune ability.
My 2 cents ymmv.
