Need help with tuning cammed LS3... please! Will paypal you a TIP! $$

[n8dogg]

If you don't get this sorted out by early next week (I have no time to look at this until then) - PM me your email address - could send you a tune that should get you started.

Hopefully you gents get it sorted out ...

Hey Taz,

Any chance you can give me a hand on my tune file? I'll have the car back in a couple of days. It's running pretty good now, I feel like there is still a little surging at light throttle application, but customer says he doesn't notice it. After the most recent re-tune, his complaint is decrease in power at higher RPM's. I didn't change any spark or fuel tables up top, not sure how that would have changed. I have the tune running in MAF operation only. Here is the current tune file: 2008 Corvette G6X3_0000.tun

[n8dogg]

Or anyone for that matter :X

[Taz]

n8dogg,

Sounds like you are close enough for the customer, and nearly close enough for yourself. Any base tune that I could send you would mean a partial rework of what you have already done. Not about being right or wrong, merely different avenues to arrive at a similar end.

Regarding the minor surging / bucking you described ..... log RPM, air per cylinder, spark advance, and knock retard (plus any other PIDs you wish) during these events. If your airflow (MAF or VVE) is close, then often the solution is as simple as adding a few degrees of spark advance in the low RPM / light load areas where this anomaly typically occurs.

The changes to spark advance in the appropriate cells will typically look like a "bell" curve ... perhaps 1 to 3 degrees on either end, with as much as 10 degrees in the middle (if beginning from stock spark tables on a cammed vehicle).

EDIT: forgot to explicitly state - change the High Spark table only during this exercise