Hey everyone.
I'm turbocharging my 90 Sambar KS4 pickup and have a question about the TBI assembly I chose (from a scrap yard).
I pulled the TBI assy. off a 91 Chevy Sprint 1.0L TBI. According to my research, the injector is there should be rated at 59.15 lbs/h @ 43.5 psi... which should provide more than enough fuel for what I'm doing.
Here's the thing; the engine in the Sambar is mounted on it's side. For me to have the TBI unit sitting "face-up" (like how it sat in the Sprint) I would have to make an adapter with a 90 degree bend in it before it gets to the intake manifold. Not only would this eat up space, but the fuel and charged air won't like all the bends.
Can it be mounted on it's side and still function properly?
Also, I have a vacuum operated fuel pressure regulator specifically for turbo applications. I read on the DIYAutoTune site that GM TBI units have a built in fuel pressure regulator, is this true? Should I install the vacuum operated one just to be sure?
Any help/knowledge is greatly appreciated.
Can I mount/run my TBI on its side?
Forum rules
Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
-
Bernard Fife
- Master Squirter
- Posts: 475
- Joined: Thu Oct 29, 2009 12:54 pm
Re: Can I mount/run my TBI on its side?
WELDER,
Yes, you can run the GM TBI's on their sides - I have done this with 2 TBI units on my Honda 4 cylinder. A very small amount of fuel will 'spit back' from the throttle blades, but this will be captured by the air cleaner and reintroduced into the air. There are absolutely no issues otherwise.
The GM TBI have a built in regulator, and these work fine. I have never felt the need to use another regulator with them. In fact Holley copied the GM design on their TBI injection units.
Lance.
Yes, you can run the GM TBI's on their sides - I have done this with 2 TBI units on my Honda 4 cylinder. A very small amount of fuel will 'spit back' from the throttle blades, but this will be captured by the air cleaner and reintroduced into the air. There are absolutely no issues otherwise.
The GM TBI have a built in regulator, and these work fine. I have never felt the need to use another regulator with them. In fact Holley copied the GM design on their TBI injection units.
Lance.
"Never wrestle with pigs. You both get dirty and the pig likes it.” - George Bernard Shaw
Re: Can I mount/run my TBI on its side?
Thanks Lance.
Do I need to run a vacuum line from the TBI unit to the intake, or does it have an internal meter?
Do I need to run a vacuum line from the TBI unit to the intake, or does it have an internal meter?
-
Bernard Fife
- Master Squirter
- Posts: 475
- Joined: Thu Oct 29, 2009 12:54 pm
Re: Can I mount/run my TBI on its side?
WELDER,
That's one of the nice things about the GM TBI - the regulator passages (vacuum and fuel) are internal, so you don't need add do any lines, etc..
The other nice thing is the built-in stepper motor IAC that makes warm-up idle easy.
Lance.
That's one of the nice things about the GM TBI - the regulator passages (vacuum and fuel) are internal, so you don't need add do any lines, etc..
The other nice thing is the built-in stepper motor IAC that makes warm-up idle easy.
Lance.
"Never wrestle with pigs. You both get dirty and the pig likes it.” - George Bernard Shaw
Re: Can I mount/run my TBI on its side?
Lance, you have all the answers.
Haha, thanks yet again.
Haha, thanks yet again.