Low end performance

[Samsonsworld]

What's the best mod to improve torque under 2000rpms? I have a 3.73 rear end with 34" tires. I turn about 1800rpms at 70mph and seem to downshift a lot more than expected when towing. It also has a 4" cat back that I think only hurt the power at low rpms.

[psd_va]

34" tires and 1800rpm at 70mph? wierd casue i have 36" tires and i turn about 1900 at 70mph. unless im looking at this wrong i would expect you to be turning more rpm

[Samsonsworld]

Originally Posted by psd_va

34" tires and 1800rpm at 70mph? wierd casue i have 36" tires and i turn about 1900 at 70mph. unless im looking at this wrong i would expect you to be turning more rpm

According to my GPS and tachometer. Sure you have a 3.73?

[stroken04]

Originally Posted by Samsonsworld

What's the best mod to improve torque under 2000rpms? I have a 3.73 rear end with 34" tires. I turn about 1800rpms at 70mph and seem to downshift a lot more than expected when towing. It also has a 4" cat back that I think only hurt the power at low rpms.

The peak torque for these engines are right at 2K.

are you sure you have 3.73's? I run right at 2k at 70 MPH.
I have 325/60 R18's, which is right between a 33 and a 34.

I may be wrong, but didnt some of these truck come out with 3.55's
EDIT: looks like I was wrong

[Dave]

Originally Posted by stroken04

The peak torque for these engines are right at 2K.

are you sure you have 3.73's? I run right at 2k at 70 MPH.
I have 325/60 R18's, which is right between a 33 and a 34.

I may be wrong, but didnt some of these truck come out with 3.55's

Wes the 6.0's didnt come with 3.55's at all.

[Samsonsworld]

Hmmm. The sticker says 3.73 with the 5 speed auto tranny? You guys have the 5-speed?

[Dave]

Originally Posted by Samsonsworld

What's the best mod to improve torque under 2000rpms? I have a 3.73 rear end with 34" tires. I turn about 1800rpms at 70mph and seem to downshift a lot more than expected when towing. It also has a 4" cat back that I think only hurt the power at low rpms.

At 70 with those tires you should be turning 1900-2k rpms. Are you stock or tuned

[stroken04]

Originally Posted by Dave

Wes the 6.0's didnt come with 3.55's at all.

good to know .

Thanks for the clarification

[Dave]

Originally Posted by Samsonsworld

Hmmm. The sticker says 3.73 with the 5 speed auto tranny? You guys have the 5-speed?

Yes I believe everyone thats posted here so far has an auto

[Samsonsworld]

Originally Posted by Dave

At 70 with those tires you should be turning 1900-2k rpms. Are you stock or tuned

I won't argue between 1800 or 1900. Call it 1900 if you want. It's definitely not 2000.

Bought the truck used from a dealer. I assume it's stock but don't really know for sure. What I do know is it runs different from stock but I attributed that to the tires and cat back. I do know there is no chip. I looked.