Regearing?
Tuned
Joined: Sep 2014
Posts: 368
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From: Ventura, Ca
RPMs (same loaded/solo) at 65 MPH are 2230 (2400 RPMs at 70 MPH) with the current 4.88/35" combo. When it had the same lift but 32" tires with the 4.88 gears it turned 2430 RPMs at 65 MPH (2600 RPMs at 70 MPH).
On a rare Interstate highway solo trip last year I set the cruise at 65-ish and saw 12.5 MPG with the current 4.88/35" setup.
Just curious, did you do the BBK throttle body change by itself? And if so what performance/economy changes did you see from it?
On a rare Interstate highway solo trip last year I set the cruise at 65-ish and saw 12.5 MPG with the current 4.88/35" setup.
Just curious, did you do the BBK throttle body change by itself? And if so what performance/economy changes did you see from it?
the throttle response was the biggest change. I added it last after the headers, electric fans, free spin kit and lost about 1.5-2 mpg.
I switched back to the factory TB and got better mpg but It felt sluggish from a stop and low rpm's so it went back on.
the truck feels faster with it with my seat of the pants dyno
with the current 35.7" mt tires I'm at 12.4mpg at 65 on my ultra gauge. I need a good long trip to calculate it properly.
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