.....this doesn't work for turbo. that works for S/C etc. FI but turbo's will just spool harder to make the same pressure. I'm not very familiar wit the centrifugal super charger setup and how they regulate boost. For all other SC systems this info is true. I'm making the assumption it is for centrifugal as well as they lack a waste gate and have a direct crank drive system.


of course ....when ur off the boost it'll be slower of course, and the lag will be increased to the turbo as the natual compression is lowered at the same rates ur math works to.

I guess my point is that FI motors dont do better in altitude as turbo motors do because we rely on a wastegate spring which is consistent regardless of altitude.

I can tell you i feel NO change from 0-5000ft. Other then some off boost and some extra turbo lag. However my friends with the CT and Vortech feel the pain of the altitude.


FOR ur question.... ur the aem ems like me... plug ur laptop in and check your knock sensors if you want to see with your own eyes. The best way to determine it quickly by bench is in hp output estimations. Not sure what u payed for that 5 gallons, never played with the stuff, but i know i can purchase 110 octane leaded fuel at the pump for $5.50 a gallon 2 weeeks ago down the street, probably expect a recent gas price drop.

 

I didn't mean to tune on 93 octane at low altitude (for max power in the absolute sense). I meant tune at the higher elevation on whatever gas is available there. Tune for the max safe power under the conditions you will run at. Let the knock sensors handle a bad batch of gas (relative to what you normally get there). But the richer A/F ratio due to increase in elevation is causing a loss of power at your current conditions that you don't need to live with.

 

AGREED. however...richer= safe as long as its a reasonable amount, not a plug fowling ridiculous amount.