Newbie questions

[Bruce Plecan]

-----Original Message-----
From: Jim Yeagley <jimyeagley at stratos.net>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Thursday, February 04, 1999 8:51 PM
Subject: Newbie questions


snip
>
>What (if any) is the difference between Chevy car systems and truck
systems?

Cars usually use a Air Temp Sensor.  Trucks might be considered
high torgue applications.

>If I use a  late model Ford fuel pump, frame mounted, is the regulator in
>the throttle body?

Don't know

>Will a 305 throttle body have enough cfm for my 400?

Not really, but the throttle body off of a Big Block Chevy Truck would.
>
>I've been reading here about different software/hardware for communicating
>with the car's computer, but I admit I haven't been able to pick up much.
I
>have a little experience with OTC Monitor 2000 and 4000, but they couldn't
>change any settings.  Can someone explain the basic idea behind changing
>(and figuring out the changes needed) the prom?

You have to make changes in the prom to change the timing or
fueling.

>>From what I can tell, there's a program that allows you to hook up a
laptop,
>kind of intercept the signals and change them between the cars computer and
>the engine, test the changes, then save them.  Does this sound right?

Ther is a device called an emulator that goes where the prom goes
that you can edit things (using a laptop), and then burn a prom.

  Then,
>how do you get these changes into a new prom?
>
>Geez, that's enough for now.  Thanks for your patience and answers, or at
>the least the entertainment from reading all the posts to this list.
>
>Jim Yeagley
>
>