I have an old 71 muscle car that runs great. It gets about 16 - 18 MPG overall. Not bad for a beautiful, original, old car with a 350 automatic, 4 bbl and points (Kettering) ignition system. Gas was cheap back then. My wife uses this for car shows and she likes to enter the “Best Stock, original†class. But she wants better mileage, so I’m going to install a TBI from a ’92 454 on it, to see if I can improve the mileage and keep the power. This will be easy to R&R the TBI back to the carburetor for the shows, it’ll take about 2 hours, tops.
OK, for you guys just getting started, I haven’t got an MSQ for fuel, yet. But I do for spark. It was easy. I just followed the Hall style ignition triggering setup with a little help from Lance and the forum, and sent it out to the stock coil for ignition triggering. I locked out the dizzy by removing the weights and just putting the springs back on. I checked this out on another Chevy and it locks it down pretty well, for a daily driver. I used the standard MegaTune spark advance table for this table.
Here’s the good part, to help people out, I thought I’d post my baseline numbers for MAP and RPM and AFR, from a good running carbureted car, so they have a target they can head towards. This is with the MS-II doing the spark and taking the MAP, RPM and AFR measurements. Remember, they are from the original car with MS2 spark table. I’ve installed an Innovate #3769 LC-1& O2 sensor (WB O2). The setting I used was “# set INNOVATE_LC1_DEFAULT "Innovate LC-1 default, 0-5v = 0.5-1.5 lambda"†in the “settings.ini†in my “chevy\mtcfg†folder. I believe this is correct. If I have set the wrong WB O2 sensor, please let me know! Thanks.
These are my cruising values.
- IDLE in gear-----Speed 45 MPH-------Speed 65 MPH;
700-750 RPM------1700 RPM-------------2200 RPM;
MAP 53 kPa--------44 kPa----------------46 kPa;
AFR 16.5:1--------15:1-------------------15:1;
Well, here’s to ya.
Happy tuning
Baseline tuning for a Chevrolet Chevy 350
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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). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
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.
Re: Baseline tuning for a Chevrolet Chevy 350
this is about as baseline as it gets.
http://www.msruns.com/viewtopic.php?f=84&t=22734
bone stock 1994 350 TBI
http://www.msruns.com/viewtopic.php?f=84&t=22734
bone stock 1994 350 TBI