Search found 4 matches

by zerofloat
Thu Apr 29, 2010 8:05 pm
Forum: General Motors
Topic: GMC motorhome Olds 455 multiport
Replies: 8
Views: 4126

Re: GMC motorhome Olds 455 multiport

woodwright wrote:Do you still get the "Q-jet sound" When you get on it?
Yes it still sounds like a Q-Jet
by zerofloat
Thu Apr 22, 2010 12:26 pm
Forum: General Motors
Topic: GMC motorhome Olds 455 multiport
Replies: 8
Views: 4126

Re: GMC motorhome Olds 455 multiport

TPI 85 Blazer wrote:What did this do to the fuel economy?
Better by maybe 1/2 mpg. It runs WAY better.
by zerofloat
Mon Sep 21, 2009 1:42 pm
Forum: General Motors
Topic: GMC motorhome Olds 455 multiport
Replies: 8
Views: 4126

Re: GMC motorhome Olds 455 multiport

Very nice work. I love the injector rails. What did you have to do to the gjet to make it work as a throttle body? That shaper is awesome. Dave Dave, Basically the q-jet needed a tps attached and all the unneeded vacuum holes plugged. I removed the choke plate, secondary flap, and the venturis. The...
by zerofloat
Mon Sep 14, 2009 5:10 am
Forum: General Motors
Topic: GMC motorhome Olds 455 multiport
Replies: 8
Views: 4126

GMC motorhome Olds 455 multiport

We have squirted a Olds 455 in a GMC motorhome and are very pleased with the results. Modified a stock cast iron manifold by brazing in injector bungs. Using a gutted q-jet with a TPS fitted for the throttle. Pics here
http://www.gmcmhphotos.com/photos/showg ... p?cat=4895