Hi Gary
The kit is documented in the GMC performance catalog. You can download it
from
http://www.gmgoodwrench.com/parts/performance_main.htm
the section of the catalog you want is pages 27-33
http://www.gmgoodwrench.com/parts/pdf/027-033.pdf
There is a complete parts list for the kit and the engine including the new
PROM. This PROM would probably be OK for the 502 in a GMC, I don't know
about using it with the 455. The ECU computes the mixture based on
volumetric efficiency not engine size alone. The 455 may be substantially
different then the Vortec 454/502. A non Vortec 454 may be an appropriate
starting point. Does Howell or someone offer a PROM for the GMC 455?
You may want to read the following page for some insight into the tuning
process
http://efi332.eng.ohio-state.edu/diy_efi/oem/gm/tunetip.html
Dave
- ----- Original Message -----
From: "Gary J Zingle"
To: "GMC mailing list"
Sent: Sunday, November 28, 1999 7:51 AM
Subject: GMC: Electronic Ignition Kit from GM for 454
>
> "Although GM does not recommend fuel injection for the HT 502 they supply
> it
> in a kit to be used as a 454 replacement in trucks. The kit includes a new
> PROM for the electronic fuel injection."
>
> Dave, if this is throttle body fuel injection it might be a way to get a
> system with enough capacity for a 455.
>
> Do you have the kit number?
>
> Regards
>
> Gary Zingle
>
