New episode of Trucks Today!

[Twisted_Dakota]

33" bfgs is what they said it had. That's pathetic numbers for a stroker.

 

[FlexdXJ]

33" bfgs is what they said it had. That's pathetic numbers for a stroker.

Considering they were using the stock intake and TB thats not bad. You gotta figure about 30% drivetrain loss going through the AW4.

 

[60anny]

Wow this episode has been pretty awesome!! Better than extreme 4x4 stuff I have seen lately! :greensmok

No kidding - it's been months since they have shown a new show - this weekend is the first new one in a very long time!

 

[kdailey4315]

:wierd: Joking right?

Wasn't that the numbers in 4 wheel drive? I'm not sure if that makes a big difference or not.

 

[FlexdXJ]

Wasn't that the numbers in 4 wheel drive? I'm not sure if that makes a big difference or not.

No they just did it in 2wd.

 

[89XJPioneer]

i was surprised with the numbers too, Thought it be much higher... i guess with a restrictive intake and being untuned killed it. My buddys 4.6 golen ripppsssss

 

[WrenchMonkey]

Anybody else notice that besides trailering it, they've lost the license plate altogether?

Robert

 

[89XJPioneer]

hahaha i did not notice that, all they talked about was how this rig was for being able to drive to the trails and make it home.

 

[tbburg]

33" bfgs is what they said it had. That's pathetic numbers for a stroker.

Stock motor was 177hp net, at the flywheel. Rough guess is 30-40 hp drain through the drive train in stock configuration. Add to that 4.10 gears and 33" tires, so you're loosing torque based on the larger tire not quite made up for in gearing. Then the fact of the heavier tires(It's a chassis dyno, the number's are derived from how fast the engine can accelerate the rollers, heavier tires slow it down.)

Motor might be doing pretty good, all considered.

 

[srimes]

Stock motor was 177hp net, at the flywheel. Rough guess is 30-40 hp drain through the drive train in stock configuration. Add to that 4.10 gears and 33" tires, so you're loosing torque based on the larger tire not quite made up for in gearing. Then the fact of the heavier tires(It's a chassis dyno, the number's are derived from how fast the engine can accelerate the rollers, heavier tires slow it down.)

Motor might be doing pretty good, all considered.

Gears and tire size shouldn't matter, as it's supposed to be a measurement of power. Lower gears will have more power loss, but it should be negligible. Same with larger tires.

Cassis dynos are notoriously inaccurate, as they rely on correction factors and the skill of the operator. Great for comparing before and after, not so good at comparing different cars on different dynos.

 

[tbburg]

Gears and tire size shouldn't matter, as it's supposed to be a measurement of power. Lower gears will have more power loss, but it should be negligible. Same with larger tires.

I have to disagree with this: short answer. HP is derived from torque reading, and torque measurement at the wheel is directly affected by gear ratio and tire diameter.

Cassis dynos are notoriously inaccurate, as they rely on correction factors and the skill of the operator. Great for comparing before and after, not so good at comparing different cars on different dynos.

However, they did have the same powertrain/gear/tire combo on the XJ as the runs they did before the rebuild/stroke. From from that perspective, 40hp up to 130 is a sizable increase.