tuning q for 730 ecm

[Bruce Plecan]

> I remember talking to Ed W. about this a long time back...he uses lock-up
> early to gain the extra speed. I kinda 'ways thought that you'd lose
> converter multiplication, but apparently his lock-up strategy works great.

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


> Lyndon.
>
> -----Original Message-----
> From: Bruce Plecan <nacelp at bright.net>
> To: gmecm at diy-efi.org <gmecm at 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 at aol.com>
> >> To: <gmecm at 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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