Looking at doing a t56 swap, I have mostly stock 4.6 and a 01 IRS w/ 3.55. My question is, will my car drive like poo with the gear ratio of the t56 with my setup?
96 Cobra T56 + IRS
- Thread starter arayray
- Start date
You might have to go to a 4.10 rear gear to be back to where you are with the 5 speed and the 3.55. However, it Depends on the gear ratios of the T56 in question.
Gear ratio would be for a 03/04 Cobra T56, just trying to figure out how sluggish it would drive NA since I plan to boost it eventually.
2.66
1.78
1.30
1.00
0.79
0.63
are the gear ratios for the 03 Cobra T56.
So it will be a bit lazy in 1st and 2nd...but will be able to wind them out as well..
1.78
1.30
1.00
0.79
0.63
are the gear ratios for the 03 Cobra T56.
So it will be a bit lazy in 1st and 2nd...but will be able to wind them out as well..
Boosted could I stay with 3.55 or would I want to look at swapping to 3.73/4.10?
Depends on how much HP/TQ you're going to make. 4.10's on a car making 500-600ftlbs to the tires isn't much fun on the street IMO. I run 3.55's currently making 641/588 and will probably go down to a 3.27 once the power starts to go up again.
You will definitely want more gear if you stay naturally aspirated. I would probably put in a 4.30.
If your plan is to go forced induction and it is your average centri car with mid-400's horsepower and torque, a 4.10 would be great in my opinion. Anything higher than that and I would think about 3.73's or 3.55's.
For years I've run a 3.55 with a T56 making 810rwhp the last time it was tuned (I need to have it retuned). I've been very happy with that setup. It has a great power band, it loads the turbo well and it cruises awesome.
If your plan is to go forced induction and it is your average centri car with mid-400's horsepower and torque, a 4.10 would be great in my opinion. Anything higher than that and I would think about 3.73's or 3.55's.
For years I've run a 3.55 with a T56 making 810rwhp the last time it was tuned (I need to have it retuned). I've been very happy with that setup. It has a great power band, it loads the turbo well and it cruises awesome.
I had the factory 3.27s in my solid axle rear end with my stock 4.6 when I swapped my T-56 in. The car was a dog, I couldn't even spin the tires. I eventually had the entire rear end rebuilt with 31 spline axles and swapped to 3.73's in case I ever go forced induction. I barely make it through a stop light before I'm shifting into second now, but I'm happy with it.
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