just had posi and 3.73's installed...few questions

[Kidcamaro98]

ok i had a auburn posi lock differential installed last wensday along with richmod 3.73 gears. I also have 18" rims with 35 series tires so my speedomter and everything else was off before the gears....anyways im not too impressed with the gears going from my 3.08's but i was told its because i didnt have it tuned yet...when i get it tuned will i notice more of a difference?? if so how is it going to change my rpm's from right now to after the tune?

[FloydSummerOf68]

Re: just had posi and 3.73's installed...few questions

ok i had a auburn posi lock differential installed last wensday along with richmod 3.73 gears. I also have 18" rims with 35 series tires so my speedomter and everything else was off before the gears....anyways im not too impressed with the gears going from my 3.08's but i was told its because i didnt have it tuned yet...when i get it tuned will i notice more of a difference?? if so how is it going to change my rpm's from right now to after the tune?

You will not notice much of a difference after it is tuned.
Really you will only notice the speedometer is correct, and it will shift properly...but it wont be much of a difference.

I was a little dissapointed when I put my 4.10's in going from 3.42's as well.

[Harry94]

Re: just had posi and 3.73's installed...few questions

I was dissapointed with my gear change (3.23 to 3.73) until I went to the track and dropped my 60' from a 2.4 to a 2.0. Seriously I thought I would be able to feel it more, but the track #'s told me they're workin.

[kristen]

Re: just had posi and 3.73's installed...few questions

it's such a suddle change your not going to really feel it unless you really jump gears high. i didin't, but you will see it in your 1/4 mile. your going to want to get that tuned cause you don't know what your driving speeds are right now. and no a tune won't make it feel different.

[916Topherv6]

Re: just had posi and 3.73's installed...few questions

i noticed a nice gain when i did mine, but the real test like stated above, is 60ft and 1/4 mile times. also those 18s are gonna slow u down jsut a lil bit too. get it tuned, it will help correct the speedo and odometer, also wont wear on ur tranny to much. without it the car shifts a lil off, which can lead to shortened tranny life

[Mr. Merk]

Re: just had posi and 3.73's installed...few questions

you dont need to have your car tuned because of a gear swap, good lord

yeah, the speedo would need recalibration, but if you're getting a programmer and it does both, do it, but tuning the car is completely uneeded

[Kidcamaro98]

Re: just had posi and 3.73's installed...few questions

i still need a tune for my intake, headers and exhaust anyways

[95FirebirdConvertible]

Re: just had posi and 3.73's installed...few questions

How much faster do you think he could go in the 1/4 mile jumping from the 3.08's to the 3.73's?

[Mr. Merk]

Re: just had posi and 3.73's installed...few questions

i still need a tune for my intake, headers and exhaust anyways

why dont you go and do some real mods before you worry about stuff like that

(something substantial enough to require a change in your fuel and timing maps)

How much faster do you think he could go in the 1/4 mile jumping from the 3.08's to the 3.73's?

i'm gonna take a wild guess and say .5 quicker?? (could be waaaaaaay off)

[Kidcamaro98]

Re: just had posi and 3.73's installed...few questions

um as far as REAL mods i have NITROUS...second off im waiting untill i get one last part for my TURBO then i will get a tune...

[foff667]

Re: just had posi and 3.73's installed...few questions

why dont you go and do some real mods before you worry about stuff like that

(something substantial enough to require a change in your fuel and timing maps)



i'm gonna take a wild guess and say .5 quicker?? (could be waaaaaaay off)

even stock cars can gain a good amount of drivability & power from a tune and many of the tuners offer free or next to free updates for changes you make.

As far as gains with gears it really depends on the car & the combo...some may gain a tenth others may gain 1/2 second like you said but it depends on how far off the combo was in the first place.

[Mr. Merk]

Re: just had posi and 3.73's installed...few questions

um as far as REAL mods i have NITROUS...second off im waiting untill i get one last part for my TURBO then i will get a tune...

so why didnt you say that.....instead of intake and exhaust?