Does anyone know what a stock Porsche 911 (997) Turbo dyno's up at Colorado altitude? If you know of any dyno results, please let me know the dyno, CF, conditions, etc.

TIA
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No one?

 

I live in denver but I don't know what my car dyno's is

 

You should take it to MAC Autosport for baseline! Only $60.

 

I assume you are just interested in determining how much of a HP loss you are experiencing due to the thin air. Your best bet (free) w/o performing a dyno is to use a relative HP calculator. Here is one;

http://www.csgnetwork.com/relhumhpcalc.html

 

The problem with those calculators is it calculates the % for naturally aspirated cars, not turbo'd cars. Thanks though.

 

Good point, maybe someone can factor that in and do a seperate turbo compression calculation...

 

Depends if boost is controlled by gauge pressure or absolute. The new GTR runs a torque model that marginally increases boost at high altitude to ensure that power remains the same.

 

Yeah, it's been an on-going debate in terms of how much altitude impacts forced inducted cars (especially by people up here at Colorado altitude). I've seen it fluctuate between 12.5 - 18%. Obviously, the challenge is that we'll never have the exact same dyno in two different locations.

 

I spent 5 years in Colorado and I may come back in 2 years. In fact, I took my TT here & dyno when I had iA Stage 3 there at MAC.

The usual rule is that a NA car loses app. 4% for each 1,000 feets, SC 2.5-3% for each and a Turbo 1% app....but if you do a search you will see that even GT700 ot GT750 can not run super well at 5,280+ ...thus in Colorado the rule changes and is more than 1% ...it isn't a linear rule I supect

Well here is my iA Stage 3 at MAC:

 

You got to be kidding. Why do you spend so much time on a Porsche forum?

 

Why does heavychevy spend so much time on a GTR forum?


I was just trying to answer the question.