Re: pcm controlled nitrous

["nacelp" <nacelp@bright.net>]

I'd think a Kluge would be the way to go.
Use the injector pulse as a "refernce",  Then the VSS for a time delay, and
TPS to execute.  Meaning,  from a roll over 10 MPH (give or take) you can
add the Nos lots faster since the tires are hooked up.  Use the reference
pulse with a 555 for a time add for triggering the solenoid, and then the
TPS for the actual turn on.
   I'd be sure to run two Nos solenoids.  Heard rumors, that pulsing them
can cause a short life, with 2 use one for just on and off then the other
for pulsing.
   You'd have to play some with a solenoid for pulse widths, and be careful
with the Power MOSFET. But I don't see where you could wrap more then $30 in
it.
   Get a copy of all the Forest Mimms stuff you can, he shows how to do
little EE things
Grumpy





> I was thinking strictly dragstrip.
> I think everybody dragraces at WOT :-)
>
> If you set the RPM range where you would normally just "push the button"
it
> would automate the process and prevent you from getting carried away. I'm
> just trying to improve on the button to finger interface without spending
> several hundred bucks.
>
> Decaf is the work of the devil,
> Kelly
>
>
> >From: Scott Parkhurst <ScottP@mcmullenargus.com>
> >Reply-To: gmecm@diy-efi.org
> >To: "'gmecm@diy-efi.org'" <gmecm@diy-efi.org>
> >Subject: RE: pcm controlled nitrous
> >Date: Fri, 19 May 2000 11:09:32 -0700
> >
> >Switch to decaf. Most nitrous systems use an arm and fire switch, based
on
> >fuel pressure and WOT. The programmable systems allow much more accurate
> >tailoring of the nitrous curve, but you've still got to be at WOT for
them
> >to enable and operate the computer program. You wouldn't want to half-ass
> >this setup, as nitrous and fuel ratios must be kept constant (and a
little
> >rich) to ensure no damage occurs to the engine. I setup a system like
this
> >on a 99 TA/LS1/4L60E, and it works flawlessly on both the dragstrip and
the
> >road race course. Once the throttle is at 100 percent, the computer
begins
> >the program, waiting .2-second, starting the nitrous flow at 65 percent,
> >then going to 100 percent within another.25-second. All of these numbers
> >are
> >variable via the NOS programmer. The car has all SLP bolt-on suspension
> >goodies and Eibach spring/shock upgrades, and 18-inch wheels with Toyo
> >Proxes tires. When the juice hits coming off a corner, you can't feel it
> >shock the tires, so they stick. You do feel the dramatic addition of
100hp
> >in the straights, and I went through a 12.5-pound bottle in a single
> >15-minute session at Buttonwillow (CA) raceway. Too much fun! Safe, sane,
> >and serious.
> >
> >Scott Parkhurst
> >Tech Editor
> >Popular Hot Rodding Magazine
> >
> > > -----Original Message-----
> > > From: Kelly Parker [SMTP:bigblockfw@hotmail.com]
> > > Sent: Friday, May 19, 2000 10:36 AM
> > > To: gmecm@diy-efi.org
> > > Subject: pcm controlled nitrous
> > >
> > > While I was gettin' hopped up on coffee this morning I began to wonder
> >if
> > > there was a way to control nitrous injection with the pcm.
> > >
> > > What I'm thinking is......As I recall the commercial nitrous
> >"controllers"
> > >
> > > allow you to set when and how long the gas is injected.
> > > Since the EGR valve wouldn't fit in my engine compartment :-) I
removed
> > > it.
> > > The control is still in the pcm along with the wiring, The pcm allows
> >for
> > > egr min RPM and max RPM, it seems to me you could replace the EGR
> >solenoid
> > >
> > > with a nitrous solenoid. Since nitrous has an "arm" and an "inject"
> >switch
> > >
> > > (arm is a toggle switch, inject is a momentary)
> > > it seems like you could just switch off the toggle to keep it from
> >blowing
> > >
> > > your shorts off when you were just cruising. When you wanted to hurt
> > > somebody just arm it and go.
> > >
> > > Has anybody tried this?
> > > Does it make sense?
> > > Should I switch to DECAF?
> > >
> > > Kelly
> > >
> > >
________________________________________________________________________
> > > Get Your Private, Free E-mail from MSN Hotmail at
http://www.hotmail.com
> > >
> > >
>
>--------------------------------------------------------------------------
> > > --
> > > To unsubscribe from gmecm, send "unsubscribe gmecm" (without the
quotes)
> > > in the body of a message (not the subject) to
> >majordomo@lists.diy-efi.org
>
>---------------------------------------------------------------------------
-
> >To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> >in the body of a message (not the subject) to majordomo@lists.diy-efi.org
> >
>
> ________________________________________________________________________
> Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com
>
> --------------------------------------------------------------------------
--
> To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> in the body of a message (not the subject) to majordomo@lists.diy-efi.org
>

----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo@lists.diy-efi.org