Turbo and Injected 270 - 11/12/16 01:21 PM
Hello Inliners, last year I made a post as I was hoping to begin work on rebuilding, for a second time, my 1946 GMC. I have finally been able to carve out some time and money to work on my project. Here is what I have so far:
270 GMC with small port head
Lakewood bell housing with 10.5" clutch and lightweight flywheel
Saginaw 4 speed with overdrive conversion
GM 10 bolt axle either 3.43 (65mph@ 1900 rpm) or 3.73 (6 mph@ 2050 rpm)
Intercooler
My primary goal is something that is very drive-able with good fuel economy.
I fabricated the manifold below with a 70mm throttle body and planned to run 3 injectors fired in a batch. I understand with the Siamese intake ports there is some difficulty. Would it work to but an injector in every runner and fire them all together or will there still be a lean/rich condition? I would like to use the manifold setup as shown just to make the plumbing much cleaner as the output of the intercooler can plumb directly into the throttle body without additional bends in the pipes. An alternative would be to run two 115 lb injectors right behind the throttle body. I have several questions, but thought I would start with the injection layout first and go from there.
270 GMC with small port head
Lakewood bell housing with 10.5" clutch and lightweight flywheel
Saginaw 4 speed with overdrive conversion
GM 10 bolt axle either 3.43 (65mph@ 1900 rpm) or 3.73 (6 mph@ 2050 rpm)
Intercooler
My primary goal is something that is very drive-able with good fuel economy.
I fabricated the manifold below with a 70mm throttle body and planned to run 3 injectors fired in a batch. I understand with the Siamese intake ports there is some difficulty. Would it work to but an injector in every runner and fire them all together or will there still be a lean/rich condition? I would like to use the manifold setup as shown just to make the plumbing much cleaner as the output of the intercooler can plumb directly into the throttle body without additional bends in the pipes. An alternative would be to run two 115 lb injectors right behind the throttle body. I have several questions, but thought I would start with the injection layout first and go from there.