This is a thread for everyone who is running and/or interested in running Megasquirt to share with the rest of the forum their experience, tuning tips, fuel and spark maps, various settings, etc with the rest of the forums in order to help everyone who is interested in making Megasquirt run on their car an easier process.
How this works.
Post up your fuel maps, spark maps, anything else you might think is useful. Then post up any kind of wiring mods, intake, sensor, etc mods that you did. Then finally post up engine mods so that people can get a good idea of matching up what they have to already running maps.
The goal here isn't to provide ready to go maps for people, it's to give people ideas of what they will need to do to make their particular setup run well. A
This thread does not replace reading, understanding, reading again, comprehending, and then re-reading the Mega manual. Neither Celica-GTS.com or the individual members of this board are responsible for bad tuning practices, not researching a feature enough, or other faults in *your* build that lead to a damaged motor and ego.This is not meant to be a step by step guide, this is meant as a place to get tips and ideas, not a thread to get your car from start to finish. MS is a DIY system, with an emphasis on the
Yourself part.
I'll start out with my stuff:
GM clip on air temp sensor out of a mid 90's Pontiac van with hacked out AFM connector:
The wiring direction doesn't matter, wires go to the pins on either end of the AFM connector. Match up with the THA pin back at the ECU. The red wire controls the fuel pump using the stock wiring. Solder a loop between the E1 pin and the Vc pin, match the Vc wire back at the ECU to the fuel pump input on MS.
Sensor by itself.
Sensor clipped in intake tube.
Early EFI harness to late TPS adapter. Just hack the backing plate from an early TPS and use the connector. The wiring is up to you, autoshop101.com has the pin outs for both TPS in their EFI Inputs tech article.
Adapter harness I made to go between MS and the stock harness already in the car, if I ever had to go with the stock ECU. It's a connector hacked out of the stock ECU with the wires soldered to the back. Works very nicely.
I'm not using ignition control yet, just using the stock distributor with an MSD 6A box. The stock dizzy VR sensor controls the MSD box, which sends a tach signal to MS through the stock wiring to the ECU.
Here's my fuel map:
You will want to raise the lower part of the map (below 72 kPA) by at least 5 from 1800 RPM+. That part of the map is tuned for 16:1 on my car, and may result in an overly lean condition in your car causing pinging or detonation.
AFR map. Only for use with a wideband O2 sensor.
Accel Enrichment
After Start Enrichment.
Engine mods:
Stock early cylinder head
bored .020" over
TRD Stage 2 cam
5MGE 60mm TB
Doug Thorley header
4AGE 210cc/min injectors
