Re: tuning q for 730 ecm

["Programmer" <nwester@eidnet.org>]

Yes, when coupling phase occurs and the stator unlocks, rotary flow is high
and vortex flow is low, you're at maximum torque transfer and multiplication
is gone. You may as well be locked at that point, I guess...

Lyndon.

>A vast majority of the multiplication is ocurring below the stall speed of
>the converter, once you'r 500 rpm over stall speed, all your taking about
is
>slippage (in a practical sense).
>Bruce

Message-----
>> From: Bruce Plecan <nacelp@bright.net>
>> To: gmecm@diy-efi.org <gmecm@diy-efi.org>
>> Date: October 17, 2000 7:03 PM
>> Subject: Re: tuning q for 730 ecm
>>
>>
>> >
>> >I think tis easier then that.
>> >Autos give you addition torque multiplication (via converter), but the
>down
>> >side is slippage (slippage is a waste of heat energey).
>> >Not wasting this heat energy gives ya some HP.
>> >Depending on converter, this slippage can be 7-15%.
>> >Down side, is all that more inertia to change speeds SUDDENLY during a
>gear
>> >change.
>> >Bruce
>> >
>> >
>> >
>> >
>> >
>> >> Heres what I think the reason is it works for some and not others:
>> >>
>> >> TCC lock at the track works to better the ET if your setup makes more
>> >> average power at RPM's BELOW your normal auto shift point with TC
>> unlocked
>> >> (or if your setup makes more average power below where you MANUALLY
>shift
>> >> your auto trans and you didn't realize it.). If you can lock the TC at
>> >your
>> >> peak power it serves to extend or flatten the power curve as it holds
>> peak
>> >> RPM for a longer period. Think of it as a switch that changes your
>3.73's
>> >> into 3.42's (well, to illustrate anyway). Use the 373's for takeoff
and
>> >> switch to 342's to keep your 1/4 mi RPM's from extending too far above
>> >> average peak power.
>> >>
>> >> If yer gonna lock it, Dont lock it at too low a RPM if you make more
>> power
>> >> in the upper range.... you're just delaying the good R's arrival.
>> >>
>> >> Locking it is cheating.. whereas N2O, for example is "natures" mod
LOL
>> >;-)
>> >>
>> >> My $0.015 Now back to your regularly scheduled EFI content.
>> >>
>> >> ----- Original Message -----
>> >> From: <ECMnut@aol.com>
>> >> To: <gmecm@diy-efi.org>
>> >> Sent: Tuesday, October 17, 2000 4:54 PM
>> >> Subject: Re: tuning q for 730 ecm
>> >>
>> >>
>> >> > Sorry for the earlier blank reply..  The TC lockup works for my
>> syclone.
>> >> > good for about a tenth in a 12 second truck with stock trans &
>> >convertor.
>> >> > I have a drawing for which adld pins to short.
>> >> >   http://www.enzoco.com/mike/syclone/lockup.htm
>> >> > Crappy sketch, but someone from the F-Body list must have liked it,
>as
>> >> > he scarfed it and put it on his own page.  Very simple.. You just
>short
>> >> the
>> >> > outside top row pins on the aldl connector together..  The TCC locks
>in
>> >> > any gear but first.  It unlock if youtrip a brake pedal switch, or
>> >return
>> >> to
>> >> > firsr gear.  If you like boost, this tends to shorten TC clutch
life.
>> >> > Cheers,
>> >> > MV
>> >> >
>> >> > >  I think that its hit or miss whether you lock the TC or not for
>> track
>> >> use.
>> >> > >
>> >> > >   A LOT of GN guys lock the TC.  This is why Precision Industries
>> >> created
>> >> > >  TC's with multi-clutch designs.  There's a group of people who
>will
>> >> swear
>> >> > >  that they gain 0.1 and 1mph for locking up the TC in all gears
>above
>> >> > first.
>> >> > >   So - when the car hits second the TC locks.  Some people have
>tried
>> >> this
>> >> > >  'trick' and not seen anything.  There's even a couple magazine
>> >articles
>> >> > >  which show car gaining a tenth by manually locking the coverter
>> above
>> >> > first
>> >> > >  gear.  I personally have never tried it.  However, I might try it
>> >this
>> >> > > weekend
>> >> > >  for shits and giggles to see if it works.
>> >> > >
>> >>
>>
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