High-altitude tuning question

Syncrogreg said:

Hello I'm headed to pikes peak with my TDI bug and I was wondering if there is a genius out there that would know some rough numbers on how many degree timing it takes per thousand feet???
I have punched some numbers approximately in my ECU bit I know they are not correct.... More of an eyeball .
Let me know.
Greg

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I'm not sure I see the point of adjusting the timing, the ECU can dial up as much boost as it wants and injection timing will be based on the air mass and temp of the air delivered to the cylinder, the atmospheric pressure before the air was compressed by the turbo is largely irrelevant.

Boost pressure does vary some based on altitude, it increases slightly up top 4500 feet and then boost pressure is decreased as altitude increases above 4500 to prevent turbo overspeed, but at anything other than full throttle the ECU can dial up as much boost as it "needs" to produce the power requested.