Mileage with a Motor Home

[Steven Gorkowski]

HI

The trick on getting the paper you want, is look for a Sae conference
near you and look at the papers and books in person at there book store.
I will go to the Motor sports one in the fall.

Steve

Bernie Jacobsen wrote:

> -----Original Message-----
> From: Eric Elliott <eelliott at arkansas.net>
> To: diy_efi at efi332.eng.ohio-state.edu
> <diy_efi at efi332.eng.ohio-state.edu>
> Date: Monday, March 30, 1998 9:05 PM
> Subject: Re: Mileage with a Motor Home
> >All fuel, HP, torque and BSFC curves that I have been able to find
> specify
> >operation @ WOT. No curves ever describe part throttle operation.
> WHY?
>
> It seems to me that for a gasoline engine to have a meaningfull part
> throttle BSFC curve, there would need to be a SET of curves for that
> engine
> i.e.  WOT, 2",4",6",8".....16".... Does this exist?  I've searched the
> web
> and only found the SAE site with its unending lists of seemingly
> random
> papers... that seems a little too harsh, I do respect the SAE, I was
> just
> alittle frustrated.  In the end, I still didn't find anything.
>
> >
> >Cummins sales sheets show their 5.9 L engines from 160 to 300 HP all
> get
> >best BSFC near 1100 RPM. Even a short drive in the ram will show the
> turbo
> &
> >torque happen at 1900. Go figure.
>
> In your short drive, you probably felt a combination of torque and
> HP.  I
> haven't looked at the 5.9L curves, but I'm guessing the HP has a very
> steep
> rise between 1100 RPM and 1900.  Also, it wouldn't surprise me if the
> motor
> in the pick up doesn't match 100% to the Cummins 6BT sales sheet
> (changes
> for emissions: cam, timing....) Just a guess.
>
> ^Bernie