2024 torque 3.15 vs 3.55

[BigMustangMike]

That is exactly what I’m trying to say. I’m just wondering if anyone has the figures. If 315s put 350 pounds of torque to the actual wheel then 355 would put 360? That’s all I’m trying to understand. How much more, put your ass back in the seat power, with the 355s versus the 315s.
I’ve read that it’s negligible when you test drive them. But there has to be a specific number somewhere or ballpark number to quantify 315s versus 355’s

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[BigMustangMike]

There is more torque to the wheels through gearing. Engine torque remains the same. Same principle as using a block and tackle / pullies / etc.

This is exactly what I’m trying to say. At the wheels what’s the difference between the 315s and 355s. I understand nothing changes at the engine. I’m just trying to understand the difference between the two in numbers. If I’m doing my calculations correctly, then the 355s would put approximately 11% more torque to the wheels than the 315s. I was just trying to see if anyone had the actual data between the two.

 

[K4fxd]

If your engine is making 100 ft lbs with the trans in 1 to 1 gear you will put 315 ft lbs to the ground with 3.15 gears. 355 with 3.55 gears. Dynos are calibrated to show engine torque. But yes a higher gear will put more power to the ground through multiplication.

 

[EFI]

Exactly. I was meaning how much more torque to the wheels with the 3.55 vs 3.15.

It's simple math.

The 3.55 is 12.7% higher ratio than the 3.15...so it would put down roughly that much more torque to the wheels given everything else is the same.

There's no real data because dynos (where you would measure output) are not affected by differential ratios. If anything, a higher numerically diff might put down a bit less power on a dyno but that's not a good real world example.

 

[BigMustangMike]

It's simple math.

The 3.55 is 12.7% higher ratio than the 3.15...so it would put down roughly that much more torque to the wheels given everything else is the same.

There's no real data because dynos (where you would measure output) are not affected by differential ratios. If anything, a higher numerically diff might put down a bit less power on a dyno but that's not a good real world example.

Thank you. This is my answer. Wasn’t sure how to say it, but I was trying to figure out the difference between the two and you nailed it. I truly appreciate it. I was just trying to figure out if there was someway to put numbers on that other than just doing the calculation. Thanks again.

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