Well, I was messing around a little today getting the G readyfor my trip this week.  Loading the top tent on, the drawers for camping stuff and the Engel frindge in the rear, did a valve lash, etc.

I also decided to take the lever off my old 280 shifter and swap itover to the shifter I have in the G now.  The shifter I modifided for the 5-speed box is the one off the 300GD parts truck and for some reason the shift lever on it is quite short.  It's like the black one in AMZ's pictures.  The lever on my old 280 shifter must be at least 2" longer, and has a little dog leg in it so I thought it would result in easier shift throws.  So far so good.  Much more natural to me.  I don't know if I'll bother changing the shifter at all.  But I might mess around with it a little more eventually to arange the gating so I don't have to lift up to get first, and still keep the lockout to reverse.  We'll see.

-Dave

I'm sorry Michele, but something is wrong in the scaling of the graphs or something.  There's just no way that some "banana pipes" (or even lumping in the new cam)  increase your torque by a factor of 4x (75-275).  The pipes and cam can increase filling efficiency, but no matter what, a normally aspirated (no forced induction) is always less than 1.  Really good ones are on the order of 0.8 efficiency.  Adding forced induction of a turbo brings that efficiency up to something like 1.5.  So even with super cool pipes, cams, what have you, for a like displacement engine, there's just no way that the graphs can be taken at face value as a before and after comparison.  We should dig a little deeper.

-Dave G.

Loki gets the whole story here then.  These graphs aren't "...before/after headers..." but before/after engine. :^)))

Still seems pretty incredible to me.  Are these rear wheel hp/torque, or with some "correction factors" applied to move the measurements from the place they can take them (wheels) to get a figures at the crank (impossible to measure w. engine in truck)?  I've seen some pretty generous correction factors.

And for what it's worth, here are the factory comparisons of torque and hp at the crank done by MB engine dyno.  Torque is the lower set of curves read from the scale on the right, and hp is the tall set of curves and you look to the numbers on the left side of the graph.  The red line for torque of the M110 is one I penciled in from a separate graph in my M110 motor manual.

-Dave G.

(MB power curves.jpg)

MB power curves.jpg (20KB - 6 downloads)