Well, the Fastchip I had sitting aroung for two months finally got installed in my truck yesterday. I had to change to a 160 degree thermostat and have to use premium fuel, but the improvements are very noticable.
I took it out for a drive after letting it idle for 15 mins to let the computer take a look at the chip and kind of babied it until I had a place to light it up. Felt the same in normal driving except it pulled in fourth gear where the truck would have leveled out before. When I jumped on it though, it let a scream out of the rear wheels and took off, barely chirped second and pulled like a beast. Had to shut it down for a stop sign right after the shift to third. Haven't had a chance to wind up third, but I bet it'll keep on screaming.
Downfall: My transmission shifts a lot lighter than it did before the chip. I used to be able to bark the hell out of second and almost get third. If I manually shift from first to second (I have a B&M Megashifter) it still squeals the hell out of second, but it barely does it on its own. I know this will save my drivetrain, but I liked the chiropractor feeling on in town shifts.
Anyhow, I can truley recommend this chip. Go to www.fastchips.com
. They only work on GM chips and do any sort of special programmin you can think of. Ed Wright is the owner and programmer.
'89 K1500 350/700r4