[Gmecm] '747 and multi=port

[Dave Harvey]

The 7747 is 160 baud. The Edelbrock mani is a single-plane, similar to 
the Torker II except the plenum & runner volumes are smaller and the top 
is machined for a TBI throttle body. In the Edelbrock MFI, the old 
throttle body is used with the TBI injectors removed. Runners are 
nowhere as long as TPI. I can't use my truck as a basis for comparison 
between the two FI systems because I went from a stock TBI 350 to an MFI 
383 w/ Vortec heads, tri-Y headers, and Isky 257/265 cam. BIG improvement.

-- Dave 

Nick Cooper wrote:

>does anybody have an opinion on the differences in performance between a
>factory tbi system and a tpi system set up with this ECM? If i'm
>interpreting this correctly, it'll control very similarly to the batch fired
>TPI.
>Does the 7747 have a baud rate similar to the SD TPIs (7727/7730)?
>I think the use of the longer TPI runners wil increase the torqe. Seems like
>a much better idea for a truck anyway.
>
>http://www.edelbrock.com/automotive/index.html, look for "Multi-point fuel
>injection", then look for "Multi-Point Fuel Injection for '87-95
>TBI-Equipped Chevys"
>
>-----Original Message-----
>From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org]On Behalf
>Of David Haggard
>Sent: Sunday, April 10, 2005 10:20 AM
>To: Dave
>Cc: gmecm at diy-efi.org
>Subject: RE: [Gmecm] '747 and multi=port
>
>
>This is great to know, as I was thinking about using bank fire multiport
>injectors on my next build, a 350. I can't use Edelbrock's PROM, just modify
>the one I already have. But if I could get their wiring harness for the
>injectors it would save a bunch of work.
>
>David
>
>[snip]
>  
>