3.55's vs 3.73's
- Thread starter codycat91
- Start date
I know..I know Tim I should have lol! Now after all the money I spent this year on the car I dont know when I feel like ripping the rear back out.. although now would be the best time since its up on jack stands anyway for the winter.
so many variables here, tires, tire size, engine, trans ect...
personally i loved my 3.73's and had no issues. my combo: 2.3L whipple gen II 21 psi of boost. 625 rwhp and 589 rwtq. 275/40R17 michelin pilot sport as plus or 275/40R17 mickey thompson et street radials. stock t56 with stock clutch
personally i loved my 3.73's and had no issues. my combo: 2.3L whipple gen II 21 psi of boost. 625 rwhp and 589 rwtq. 275/40R17 michelin pilot sport as plus or 275/40R17 mickey thompson et street radials. stock t56 with stock clutch
Nope that's the route I'm going when I do the rear diff. Just waiting to see what fore innovations has coming. I only want to do this once.
Back in the day I used to run 5.38s on the sreet in my Chevy II (still have it), with a close ratio Muncie, and a 29" tall tire.
I'm having fun in this thread reading about guys going to 3.27s or 4.10s.
I guess it shows how things have changed.
I'm having fun in this thread reading about guys going to 3.27s or 4.10s.
I guess it shows how things have changed.
Just depends on what you want out of the car. Most of the Turbo guys run 3.27s to help load the turbos up more.
With 550-600whp a 3.55 will be about perfect on a 26" tire (factory).
I had 4.10's with 470whp when I was sc and my bfg 315/35/17's were useless in 1st and second if I launched too hard. With 550, 4.10's would be aggregating imho.
I had 4.10's in a 500whp turbo car for a week and hated it; 3.55's now on a 28" tire and will probably get a 3.27 soon as even these gears are too tall for a turbo car on a 28" tire.
I had 4.10's with 470whp when I was sc and my bfg 315/35/17's were useless in 1st and second if I launched too hard. With 550, 4.10's would be aggregating imho.
I had 4.10's in a 500whp turbo car for a week and hated it; 3.55's now on a 28" tire and will probably get a 3.27 soon as even these gears are too tall for a turbo car on a 28" tire.
Its funny (not really) how most of the people that actually post, are arguing for lower (3.55's) while the poll shows 3.73's
Anyone have track time comparison with only changing gears ??
3.55s
Don't fix what ain't broke. Unless you specifically have an issue arise that clearly would be solved by a different gear ration, leave it alone.
The 3.55s are correct for a huge variety of conditions, applications, horsepower levels and even tire sizes in these cars.
And if you ever go for more power(twin screw or turbo) you will need a very tall tire to compensate for a move to 3.73s.
Don't fix what ain't broke. Unless you specifically have an issue arise that clearly would be solved by a different gear ration, leave it alone.
The 3.55s are correct for a huge variety of conditions, applications, horsepower levels and even tire sizes in these cars.
And if you ever go for more power(twin screw or turbo) you will need a very tall tire to compensate for a move to 3.73s.
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Just ordered a new set of 3.55's from Tousley to replace my brand new 3.73's LoL
Time for a better Diff cover while your at it.
Better how? cosmetics? I've not heard of the factory unit breaking with an IRS brace installed. Prior to my brace I put a hair line crack in my diff cover and it would leak oil. That was when the car was new & stock too. Drive it like you stole it lol
People have had worse than that with a brace.
3.55's ftmfw; congrats
LOL!!!! Yup cosmetics. :rolling: All joking aside Tony is like me and loves to spend money. Fore innovation is making some and you have to go on the list. Has a diff cooler option as well.
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who has swapped to 3.27's with the t56?
Well on 3:55s you'll dyno less rwhp than with the 3:73s if that makes you feel betterlol
incorrect:nonono:
So you're saying changing rearend gears don't affect torque multiplication or rear wheel HP?
yes incorrect. the dyno tuner has to put in what rear axle ratio gear you have in it to account into the formula for getting the correct numbers.
horse power is a calculated formula based off the torque
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