Learn the basics of tuning your own TBI/TPI/LT1/LS1 PCM, including timing, fuel curves and more; or just send your PCM to me for an inexpensive tune!
This website is dedicated to helping you learn how to tune your own LT1 car computer (PCM), using the popular and inexpensive TunerCat software as the model.
Start with the basics, like removing the skip-shift for you six-speed owners, or accommodating for the larger wheels or different rear gear ratios you've installed.
Then we'll progress to altering the timing and fuel curves, to get better throttle response, torque, and even MPG! Click Free Tips to see what I have so far! Much of it can be applied to other engine/PCM types, including TPI and LS1.
If you don't have the time, money or desire to do this on your own, but would still like some changes made to your PCM, I also offer a very inexpensive tuning service for the 1986-2003 OBDI/OBDII TBI/TPI/LT4/LT1/L99/LS1 PCMs.
This includes the Camaro IROC/Z28/SS, Firebird Formula and Trans Am, Corvette, Chevy Caprice & Impala SS, Cadillac Fleetwood, and Buick Roadmaster (including the 4.3L L99 engines)! Just click the Get Tuned! button above to learn more!
If you have no ability to tune yourself, my main service allows you to postal mail me your PCM for tuning, for just $75 OBDI LT1 / $85 OBDII LT1 / $90 LS1 for basic changes, or only $135 OBDI LT1 / $145 OBDII LT1 / $180 LS1 for power, MPG and/or auto transmssion tuning, or for your '92-'93 LT1, have me mail you a new tuned chip for $65 or $115. All prices include free USPS Priority Mail return shipping and one free retune!
But, if you have your own tuning software, and are looking for help or a place to start, I also offer tuning via email, using your own PCM image, for only $85 OBDI / $95 OBDII / $110 LS1, including three free fine-tunes!
Lastly, for 1994-2003 flash-based PCMs, I can loan you a kit to load my tunes yourself as well as data-log your vehicle while driving, so that I can tune it completely through email, for one week: 1986-1993 TPI/TBI/LT1 PCM ($200), 1994-1995 LT1 PCM ($180), 1996-1997 LT1 PCM ($190), and 1997-2003 LS1/Vortec PCM ($225).
Now I only have to press on the gas pedal and accelerate without flooring the pedal. Gas MPG upped to 18 around town now. Maybe 20 on long trips. Good for a 9C1 car with 3.23 gears.
Emails Not Arriving! I have received several reports of people emailing me over the last month or so, without me ever receiving them. If you contacted me within that time period, and did not receive a reply, please do not think I am ignoring you! Please use my contact form to try again, or if you are on Facebook, like my page and contact me from there to ensure I've received your message. Thank you for your understanding!
Do you need a good tune, but cannot afford the down-time of mailing your PCM to me? Do you not have any interest in long-term tuning where you would need to buy your own equipment and tuning software? Now I can loan you one of my tuning kits to allow me to fine-tune your 1986-2003 PCM to match your individual setup, without you needing to send me your PCM. No more downtime, and a fully tuned vehicle!
You can now have the same tuning tips on my website in a handy, printable PDF format, for easy offline reference (over 20 full pages!).
If you decide you like the idea of tuning on your own, visit TunerCat and purchase the C.A.T.S. Tuner software to get started ($69.95). For working on your '94 or '95 LT1 PCM, you'll also need the $EE definition file ($19.95).
Then just get yourself an OBDI ALDL cable and compatible computer, and you're ready! Use my free "Tips" page or buy the PDF version for a small fee, and get started!