g.p. gear ratio

[pontiac55]

If I run the stock 81 tooth spur and drop the pinion to a 19, what will my gear ratio be?
I know that with the stock 81 spur and 32 pinion the gear ratio is 3:52.
I will be running a 20 turn stinger motor in it so I am hopig that it will make up for some of the lost top end by the smaller pinion gear.
I have several pinion gears to mess with, but I was just wondering how much lower the gear ratio will be if i just throw on a 19 tooth pinion right off the bat. I know that going from a 32 to a 19 is a HUGE leap in gear ratio, but I have no idea how much
looking for more low end torque, faster take offs, and decent top speed(more than 20 mph if possible).
thanks.

 

[bpare207]

4.26 or 81/19

 

[CAP'N KANUCKLES]

This is how i understand it.You went from the stock 27t motor to a 20tmotor so you gave up grunt(lowend)in the 27t and add highend(rpm)going with the 20t,now adding a 19t pinion is going to get some of the lowend grunt back while getting a little more top speed.If you were to stay with the 23t pinion(stock on GP) you would have more speed less grunt.

 

[pontiac55]

This is how i understand it.You went from the stock 27t motor to a 20tmotor so you gave up grunt(lowend)in the 27t and add highend(rpm)going with the 20t,now adding a 19t pinion is going to get some of the lowend grunt back while getting a little more top speed.If you were to stay with the 23t pinion(stock on GP) you would have more speed less grunt.

well, i just got my g.p. today and it still has the stock motor in it with the stock pinion. I did swap out the original "square tooth" looking pinion for a better "sharp tooth" pinion of the same size.
I modified the shocks by drilling the 3 stock holes in each piston one size bigger, and I also drilled 3 extra holes in each piston. Put in 30 wt. synthetic shock oil and now the shocks are really nice. Nice & soft, but still firm enough to handle jumps.
I think i'm going to put in the stinger and see what happens, but i will keep the original size pinion gear.
i'm not looking for a rock crawler, and i'm not looking for a speed demon. I want the same kind of mix of torque and speed that the stock 27 turn motor gives, just maybe amplified a little. That's why i thought a 20 turn stinger would be the answer because it makes more rpm's and it will wind up fast.
well, i guess we'll see what happens with it.