Even More TPI questions

[John Hess]

----------
From: 
 txhartma at spdmail.spd.dsccc.com[SMTP:txhartma at spdmail.spd.dsccc.com]
Sent:  Wednesday, January 15, 1997 9:14 AM
To:  diy_efi at coulomb.eng.ohio-state.edu
Subject:  Re: Even More TPI questions

>
> > Ok - lets say that I have an '87 TPI - basically stock.  Can I
                                          ^^^^^^^^^^^^^^^^^^
> > just swap out a PROM for the '89 TPI to eliminate the cold-start
> > injector
> > on my '87??  IOW, is there a hardware(wire harness) difference
> > that would prevent this (other than the cold-start injector 
wiring)
> > (this may lead to more questions ;)  )
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>
> Yes!  You can do exactly that!.  It is generally recommended that 
you
> disconnect the lead to the existing cold-start valve and, in fact,
> completely remove it and plug up the hole in your manifold and fuel 
> rail.  I have not accomplished that, yet, but DID disconnect the 
lead.
>  JAH

Great - that's good to know.  As predicted, I have more questions 
now....

Let's say I wasn't quite honest when I said "basically stock".

Let's say that I have a Vortech supercharger and that I know that
I'm a little lean in the upper rpm range where it's starting to
really put out some boost....  (uh oh - detonation!)

Is there an easy way to use this 9th injector(the cold-start one)
to help keep me out of detonation - mainly as a crutch for
too small factory injectors??  I know I don't want to keep
raising the fuel pressure because the injectors don't last
long under 80+psi right??    So maybe use an rpm activated
switch to trigger this injector at say 3500rpm???  Is this
feasible??

It is probably feasible;  but, it would make much more sense to get 
with someone like Steve Cole at TTS and remap the PROM.  Also, have 
you considered larger injectors?

TTS Power Systems
1280 Kona Dr
Compton, CA  90220

Telephone (310) 669-8101


thanks again for any insight!

T.
--
Terry Hartman           voice:(972) 519-2920           ,,,
txhartma at spd.dsccc.com                                (o o)
DSC Communications Corp. 
  -----------------------oOOo-(_)-oOOo------------|
Plano, Texas 
 -------------------------------------------------------------|