Originally Posted by
typhoonss
OK I have spent about 5 hours reading posts over the past 2 days and I have changed the spark table, added a little more at idle and some to the 60-100 map in the 1800-3200 range. I also added a degree to the pe so it is at 3.52 now. I also changed the BPW from 110 to 120. I took a drive and datalogged and used the vortec ve excel sheet to correct the VE tables. It did not fall on it's face in the higher rpm but still stumbled a little. So I added a little more timing higher map and rpm then took another drive. Here is where I am at now. Idle a little high, I have been trying for a year now to get this down but nothing really seems to help, it is either high or it wants to die, maybe someone can give me a direction on what to try to change. WOT is almost perfect in first gear around 4800-5000 I get a little stumble but is good in second WOT. Just under WOT but over 3/4 throttle I get a little stumble in the higher rpm range 3000-4800. My second gear shifts in auto or D at 4800 in second. Additionally if anyone can take a look at the datalog and give any pointers if anything else looks odd or misconfigured as alot of you out there seem to know this system very well.
It's all about learning, testing, changing and over and over again till good.
CdeeZ - I have thought of going the route of upgrading the computer but my next step will be an after market throttle body system as this truck will eventually be for play and I would like to see 500hp, hopefully a year or 2 down the road. This is just a daily driver that I was looking for 350hp and hopefully still get decent gas mileage. At the present time I get around 14-15 depending on the driving situation.
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