adjusting timing on boosted lt1

[mekkis]

that seems like it would cause far more problems than just barometric calcs.

Yeah, I suggest Holley HP/Dominator, but I don't choose what comes on or is done with 95% of the cars I work on.

Anyway, if you've not seen it before: http://www.camaroz28.com/forums/comp...uction-560089/

[delcowizzid]

i normally drop 1 degree-1.5 degrees per psi off my 100kpa timing curve but it depends on your fuel ratio i run 11.8:1 fueling on boost .if your real rich it will handle more timing but rich costs power.i could run way leaner and make more power but i like to stay a little rich just to cover any cylinders that may be running leaner than others since fuel ratio measured in the pipes is an average of all cylinders and one could be rich and one could be lean and still give you good a/f readings.

[MYLTWON]

Could someone please explain to me how lowering the baro update update gives you a bigger range to measure in the computer?

[RobertISaar]

that alone doesn't. modifying when the baro value can be calculated prevents the PCM from adjusting baro up to whatever boost you're running in the real-world while it thinks it is actually still in the 1BAR range. expect other "funny" things to happen though, considering in a normal situation, the PCM will be calculating somewhere along the lines of 50kPa barometric.