lb/hr calculation in ERROR (TunerCat vs. WinBin)

["trax" <trax@frederickmd.com>]

Guys,

There HAS to be a discrepency between using WinBin with the 7730v3.ecu file
and using TunerCats.

I have a .bin that I created in TunerCats to have an injector flow rate of
24.1lb/hr.  Using WinBin with the 7730v3.ecu file available at
ftp://ftp.diy-efi.org/incoming/ shows an injector flow rate of 2.56
grams/sec. which equates to 20.3lb/hr.

So, I loaded the stock AUJP .bin into WinBin along with the 7730v3.ecu file.
It reports 2.79 grams/sec which equates to 22.1lb/hr (which is correct).
WinBin with the stock AUJP .bin and the 7730v3.ecu file has the correct
values.  But, modified injector flow rates appear to be wrong.  This is an
important issue which should be addressed ASAP for those of you guys who are
using WinBin.  I am using TunerCat and everything appears to work great with
TunerCat.

FYI - I tried these calculations in the REVERSE order too.  I loaded a
standard copy of the AUJP .bin file into WinBin with the 7730v3.ecu file.  I
changed the stock injector flow rate from 2.79 grams/sec (01CC) to 3.03
grams/sec (01F4) in order to produce a new injector flow rate of 24.1lb/hr.
I saved the .bin and loaded it into TunerCat.  TunerCat now shows 20.3lb/hr
for the injector flow rate.

Somebody is obviously wrong here.  My bet is either WinBin or the .ecu file.

Tim


>-----Original Message-----
>From: owner-gmecm@diy-efi.org [mailto:owner-gmecm@diy-efi.org]On Behalf
>Of rr
>Sent: Tuesday, June 13, 2000 8:11 PM
>To: gmecm@diy-efi.org
>Subject: Re: lb/hr calculation
>
>
>
>Wow, I'm having trouble following you guys. However, I think I see the
>discrepancy. Tim, your equation below is a correct conversion from
>gms/sec to lbs/hr.
>
>Looking at the anht hac, location 41c is in sec/gms, not gms/sec. This
>appears to be the sticking point. That hac has 460 in that location
>for 22# injectors.     ARG = ((SEC/GRAM * 256) * 5). The bigger
>the injector, the smaller the number.
>
>BobR.
>
>
>trax wrote:
>
>> Could someone here please post why my calculation is wrong (or if it is
>> correct).  I just want to make sure that my new .bin will have the
>> appropriate setting:
>>
>> 2.56g/s * 1lb/454g * 3600sec/Hr = 20.299559lb/hr
>>
>> Tim
>>
>> >The calc I posted matches the aujp bin, so I accept it to work.
>> >It also matches the 38# setting
>> >in the new "custom" chip I just wasted money on.
>> >
>> >I'm not a math wiz, so I can't twist it around like yours, but i'm
>> >pretty sure yours is incorrect.
>> >
>> >Squash
>> >p.s. I seem to recall that this calc is the same for the 7747, and
>> >that is where I got it.  It
>> >seems to jive in my head?
>> >
>> >--- trax <trax@frederickmd.com> wrote:
>> >> Calculations:
>> >>
>> >> 2.56g/s * 1lb/454g * 3600sec/Hr = 20.299559
>> >>
>> >> Am I missing something?
>> >>
>> >> >1/(#hr/3600*453.59237)*1280  --  use this to get your value.  261
>> >> >(dec) = 38 #/hr according to
>> >> >this, and 462 = 22#, 423 = 24#
>> >>
>> >> Tim
>> >>
>> >-------------------------------------------------------------------
>>
>
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