I live here in Reno, NV at about 4800' feet, I am planning on getting 272's. Will the altitude make the loopy idle even worse? I will have to wait a bit between getting the 272's installed and flashed, or EMS. Other than power loss, what other problems am I suffering with due to the altitude.

 

Bump

 

You shouldn't have any problems with idle at those altitudes other than the same problems you would have at sea level. I know several Evos with those cams at 4500 ft elevation levels without any problems. I have been to the track at thos elevations with 272s and I could not detect any discernable difference in idle.

 

I ran 272's in Denver and didn't have any problems. Besides power loss you'll also experience more turbo lag due to altitude.

 

I hate turbo lag, would 264s be a better choice? My goals are 500whp at sea level.

 

The lag is a result of altitude not cam choice. Again, I had no problem with my 272's.

 

loopy idles are crazy

 

i was told by someone in denver that 264s are best for high elevation areas. how was your experience with the 272s? also, i will probably PM you about turbo choices for high elevation, i still cannot make my mind up and your the only one that i know who has experience with high elevation and turbos.

 

I have 272's and ran them on the stock turbo and GT3076R, no problems with idle at all. I even run them without cam gears.

 

have you been in an evo that has 264s? if so, how does it compare? would 280s be too much?

 

I have been in a car with 264's, obviously not as torquey but much better top end. I might switch to 280's with my new setup, we will see.