Hello Everyone, I have a 2000 S 10 4x4 I put a New Marine 4.3 vortec engine from Mabco Engine rebuilder. In Texas.
it has shorty headers and a custom built cold air system, Over sized three core radiator with two electric fans. designed for a C 10 chevy truck.
This motor came with an aftermarket cam 468 intake 472 exhaust 268 intake and 272 exhaust duration 110 lobe sep. . I have been working on a tune for this over a year, I spent money on after market tune by Texas tunes, and was sorely disappointed. The tune he sent back had only base spark tables advanced
I emailed and tried to get him to fix this tune but no replies. So I did this myself from the stock Tune. I need some help verifying if I am on the right track with my tune, (300.00 spent on bs advertisement about how good this fellow ishttps://forum.hptuners.com/images/smilies/mad.png) I started with Greg Bannaks book then the Master Efi Tuner I purchased on line, and followed their instructions as much as possible, I recurved the Maf table, I added to both Ve tables added to spark table disabled close loop and tuned in open loop. This is my latest scan. I also added to my EOIT to ad crispness to throttle and stop the annoying surging at cruise due to cam overlap. This is the scan let me know what you think. Thanks.