Hi..Just to introduce myself. I have been a shade tree mechanic for a long time. A Jack of all trades, master of none. I try to fix everything myself and have to be tortured a little bit before I submit to a "professional". I am lucky enough to have an acquaintance that is a mechanic, however his youthful knowledge is geared toward the newer cars and computers. Which brings me here.

I have a 1995 Camaro Z28 LT1 6 speed that I am trying to Tune after a pretty much stock engine rebuild. I picked it up with 40,000 miles and two spun bearings, and metal everywhere. I pulled the engine and was going to just swap it when I ran into a race engine rebuilder who took pity on me and tore it completely down. Everything was replaced with better that stock parts, however the only major "change" was a .40 overbore.

This was mostly due to the lack of OBD1 tuners anywhere near me, and my initial fear of computers (I don't think these things will catch on.)

But now here I am. I recently had some time to research tuning it myself and bout a cable and this used laptop. I downloaded Cats winflash and TunerCat RT.
Pulled the stock code, changed cylinder volume, turned off VATS and CARS. But now have a minor issue.

Prior to my ownership the previous owner upgraded the wheels/tires. They are now 255 40 18. I'm trying to change the speedometer. I know it's minor but I am gradually trying to do more with the tuner capabilities. I found the spreadsheet that figures the speed scaler, fraction scaler and speed scan tool settings, but read that I need to change the "time between pulses for 'stop'". I have no idea what this is or how to figure it out.

Anyone out there able to lend a hand? And any other basic tuning advise would be appreciated as well.

Thanks again for the add. I hope to read and use these pages often as they appear to cover a wide range of topics.