93 S10 Reading Jet Chips

[donf]

Sure 1993 S10 4.3 4l60e BCFZ

[In-Tech]

Thanks, didn't have that one. There's the scan id at 4000,1 Scan id = 1651 = 0673h
-Carl

[donf]

The tune was pretty successful. We did a few logs on the street over the last few weekends to get the trucks street manners dialed in with the wideband. Its not a very wild build, just a rebuild 4.3 with a comp cam 260 @ 108lc and some shorty headers. The customer was particular, the biggest complaint was the very slight rough idle. When I explained that aftermarket cams usually do that, he wanted the idle speed raised to smooth it out. Lots of little stuff like that. Once it was all fixed up we put it on the dyno. Customers reading forums can be a hard thing. He read somewhere that 35 degrees was the ideal advance for max hp on the 4.3. We already had a smoothed and raised spark table but it was conservative, but I made a deal with him that we would do WOT runs and slowly raise the advance from that side of the spark table until power started to flatten or drop. It actually gained a lot, much more than I was expecting but we still never hit 35. Ha ha 27 from a starting point of 22 was where we ended up. The runs shown were changes to the main spark table only. The runs time wise, are from top to bottom. The first two runs were unchanged for a baseline. The second run HP drop was because I did not let the truck cool back down. From then on I watched the temp closely to make sure the data would not be skewed. This dyno does read lower than some. I cant control the calibration on others machines. Mine, I know is accurate. Its not so much the number but the difference you need to look at. We did not do a pull with the stock programming as that would be awful. The second to last run was over advanced so we went back to the previous settings. Notice the torque peak number is the same on both runs.

LAWRENCE.jpg

LAWRENCE3.jpg

[brian617]

Good looking spark table. That's nice and smooth like I make mine.