gear/speed calculators?

[Smoke Panther]

I'm getting 4.11's installed next week, and want to make sure that the shop doesn't screw me and put 3.73s or worse in there. My butt-dyno is notoriously weak, so I'm gonna need hard numbers to confirm I have bigger gears.

[Tom Rs]

Re: gear/speed calculators?

i dont think gears affect dyno numbers

[summitlt]

Re: gear/speed calculators?

Itll be pretty easy to know. Especially going for 3.40s to 4.10s

[youngsc]

Re: gear/speed calculators?

there's calculators online. Just find one all you have to do is plug in total tire height, rear axle ratio, ratio of trans gear your in and it will give you the approximate speed you should be reading on your speedo. Match that up to a 4.10 and if it matches your good to go if not open a can of whoop *** on them for taking your money. Oh and I don't want to know why your "butt dyno" doesn't work.

[Smoke Panther]

Re: gear/speed calculators?

Itll be pretty easy to know. Especially going for 3.40s to 4.10s

Oh and I don't want to know why your "butt dyno" doesn't work.

I'm not very sensitive to mods that get put on my car...the only one I've felt was my cam. Only reason I knew I went from 3.23's to 3.73s, aside from doing the install myself, was my speedo being off...so I'm not anticipating being thrown into my back seat from going from 3.73s to 4.11s

[IDoVoodoo]

Re: gear/speed calculators?

try this:


http://www.f-body.org/gears/

[1999Spectre]

Re: gear/speed calculators?

why dont you buy the gears from summit racing or jegs and take it to them so they can put it in. prolly a lil cheaper that way too. i'm exactly 10mph off on my speedo and i got 3.73s. so i'm sure you wont be much more than that. thats going pretty high anyway. what other mods do you have?

[OutKlast]

Re: gear/speed calculators?

Doesn't that mess with your odometer too or just the speedo? I'm putting in slightly higher gearing but I plan on getting HP tuners and fixing it pretty soon too.

[Smoke Panther]

Re: gear/speed calculators?

^it messes with anything that gets it's data from the rotation of the wheels

why dont you buy the gears from summit racing or jegs and take it to them so they can put it in. prolly a lil cheaper that way too. i'm exactly 10mph off on my speedo and i got 3.73s. so i'm sure you wont be much more than that. thats going pretty high anyway. what other mods do you have?

That's a good idea...when you say "10mph off," do you mean it reads 10mph faster or 10mph slower? My car has full bolt-ons, cam, gear, and some suspension

[1999Spectre]

Re: gear/speed calculators?

its 10mph faster than what im really doing. and the faster you go the more off it gets. i top out at 105mph. my ex and i went at the same speed in our cars(she has an infinity g35 coupe) and i finally topped out and she told me she was at 105mph over the phone when she was beside me. not really exact lol but its around there close cause no car is ever exact. do you have the lsd to go along with the gear change? i got one from a WS-6 trans am for $120.

[Smoke Panther]

Re: gear/speed calculators?

I'm replacing my ZT with a Tru-trac

[1999Spectre]

Re: gear/speed calculators?

somebody has some of those gears in the for sale section. jump on it.