As many may already know, I converted my 94' Suburban to a TPI using the Speed-Density TPI system off of my 1991 Firebird GTA. Both vehicles are stock 5.7L engines. Click here to see the swap itself. This information is specifically for OBD-I ECMs.
The "Custom" chip I bought from Street & Performance was anything but "Custom". "Custom" is a joke! My $200 custom chip was nothing more than a stock Z28 AUJP bin; but had some minor changes to the VE tables, Spark Advance Tables, EGR and Fan-on temperature. A stock MEMCAL is like $80 at a GM dealer, and you can probably find them for $30-$40 on the internet.
For the price of some "custom" chips, you can invest in the equipment and software to read, change, and burn you own chips. By using a "flash" chip conversion like I did; it is easy, quick and can be done as many times as needed to customize the chip for your specific application. You can make changes and field verify how the engine and vehicle respond using real-time datalogging.
It is not as hard as you might think. Click here to see how I did it. Be sure to read the link to the article titled "Chips Know it All". It is the best summary I have come across when researching this topic.
Good luck with your "custom" chip tuning, Ed www.edgesz28.com
Did You Know?
The "Custom" chip I bought from Street & Performance was anything but "Custom". "Custom" is a joke! My $200 custom chip was nothing more than a stock Z28 AUJP bin; but had some minor changes to the VE tables, Spark Advance Tables, EGR and Fan-on temperature. A stock MEMCAL is like $80 at a GM dealer, and you can probably find them for $30-$40 on the internet.
For the price of some "custom" chips, you can invest in the equipment and software to read, change, and burn you own chips. By using a "flash" chip conversion like I did; it is easy, quick and can be done as many times as needed to customize the chip for your specific application. You can make changes and field verify how the engine and vehicle respond using real-time datalogging.
It is not as hard as you might think. Click here to see how I did it. Be sure to read the link to the article titled "Chips Know it All". It is the best summary I have come across when researching this topic.
Good luck with your "custom" chip tuning, Ed www.edgesz28.com
Did You Know?