GM TPI tips for a newbie

[David Sagers]

In putting a TPI on a 406 the factory settings work just fine with the 28 lbs injectors, but a built motor is very different than a stock motor.

For a stock 406 28 lb injectors are all that's needed.  If it's built the perhaps a 30 lb.  Also consider finding a programable system so that you can dial in the fuel & ignition curves to match your cam, headers, etc...  I would look for a computer that can be programmed from a lap top while you drive.  Other members can tell you how to burn new chips.  It's your choice.


>>> Charles Brooks <cbrooks1 at mail.tqci.net> 01/13 4:30 PM >>>
Hi all, I joined the list to gain more info on EFI operations
and maybe a little knowledge, If I don't get lost too quickly!

I have a 1987 Monte Carlo SS as a pet project. I recently
installed a built 406 and I've been contemplating an EFI swap.
Well, I stumbled onto a TPI setup from a 1985 5.0 Camaro and
contemplation time seems to be over :)

The 406 flows A WHOLE LOT MORE AIR than the 5.0 so I know I
need to use larger injectors. My guess was 28-32 Lb units but
I'm not sure. I've spoken with a few places about a custom
chip for the ECM but everyone seems to carry "Off the Shelf"
chips instead of doing any custom work. I'm unsure of my
options at this point.

Charles