Basic rundown:
Looking to be able to control a 1988 2.0L 122ci GM 4 cylinder OHV. TBI fuel (1 injector), speed density, 2 coils controlling spark. Transmission is manual so that is out, but I am looking to be able to turbocharge it as well.
Is there much information about 4 cylinder TBI engines on MS? I havent been able to find anything, yet. Dont need to do much, just need to be able to install a 2 bar MAP and pull timing/adjust fuel.
Thanks!
Question: 4 cylinder TBI + boost
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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.
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Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: Question: 4 cylinder TBI + boost
MegaSquirts come standard with a 2.5 bar MAP sensor. A 4 cylinder TBI motor is by itself no particular challenge. One problem I do see, however, is that GM's single injector TBIs don't have much fuel flow rate as they were designed to provide enough fuel for a 100 hp engine or less. I'd consider swapping on some type of multi-port manifold before going turbo.
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Six_Shooter
- MegaSquirt Newbie
- Posts: 18
- Joined: Wed Aug 18, 2010 6:27 pm
Re: Question: 4 cylinder TBI + boost
If you decide to stay TBI, you will need to bypass or ad an additional FPR, in order to raise fuel pressure in a 1:1 ratio with boost. I don't believe the OEM FPR will do this.
Also depending on which TBI you have, you might be able to either swap in a larger injector from another TBI application and/or make the injector adjustable.
Also depending on which TBI you have, you might be able to either swap in a larger injector from another TBI application and/or make the injector adjustable.