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Are these dyno numbers very low?

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It's probably close to right. If I saw the data log and the tune file I could comment on what I see and offer an opinion on what was done within the tune.


The truck probably still feels slow because you added headers to a truck with 3.08 gears. The headers shift the torque curve a little and those gears suck for everything but fuel mileage. Going to 3.73's would be a huge upgrade.

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The headers are fine. Wrapping stock manifolds wouldn't do anything, there isn't a worry about keeping heat in on a cast steel manifold.


A tru-trac is good idea along with different gears. Pretty much it needs different gears to feel faster or it needs a camshaft upgrade to make it faster.

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