[Diy_efi] TPS Specs / PN's
clair.davis at charter.net
Fri Dec 29 13:54:10 CST 2006
I guess at some point, I'd do myself a favor if I learned something about op
amps and other little electronic widgets I could make myself, but I know
squat about them at the moment. I still have my "Principles & Applications
of Electrical Engineering" text, but only because it was so full of errata
that the bookstore wouldn't buy it back after that semester...
I'd really prefer to have a PN/application that I could ask for at any given
parts store should the thing fail out in BFE.
----- Original Message -----
From: "Mike" <niche at iinet.net.au>
To: <diy_efi at diy-efi.org>
Sent: Thursday, December 28, 2006 12:55 AM
Subject: Re: [Diy_efi] TPS Specs / PN's
> an LM 324 op amp would do it, few app notes on that around the
> web, its a 14 PIN ic with 4 x opamps, select resistors for multiply
> by 5/3.8 and use one as buffer amp at front end for 1:1, that and a
> zener regulator would be all you need... cheers
> At 12:50 PM 12/28/06, you wrote:
> >I've run in to an issue with my TPS that may become a problem in the near
> >future. I'm using a Mopar Performance billet 4V 1000cfm throttle body
> >came with Mopar-type sensors (MAP, IAC, TPS) as it is the "off-road"
> >replacement for the Magnum V8 throttle body. Although the MAP and IAC
> >to be pretty straight forward, the TPS is both non-adjustable, and
> >seem to reach full voltage at WOT. By relocating the mounting holes, I
> >able to achieve 0.5V at idle, but I can now only get about 3.8V at WOT.
> >not sure how the Magnum trucks dealt with this issue, but I don't think
> >'7730 is going to be happy as-is.
> >I suspect that I may be able to program around the WOT voltage limit, but
> >I'd prefer not to if at all possible. This now brings me to my
> >is there a resource out there that discusses the various options for
> >I'd like to see if there is something out there that will give +/- 5.0V
> >WOT and still give 0.5V at idle, AND be correctly "handed" for my
> >application. I would estimate that the throttle shafts turn about 80-85%
> >the GM TB I have in the garage when at WOT. I've got a catalog on TPS
> >made by Tomco.com, but it doesn't get in to the guts of the specs, just
> >and ID photos.
> >Any help greatly appreciated, especially now that the critter is running.
> >Idles OK (needs IAC tweaking), throttle response is nice (not moving
> >but I want to make sure it KNOWS that it's at WOT when it is.
> >69 Valiant 340/'7730
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