[1390]

i have been reserching and no one has brought up the issue of elevation? does anyone know if this will have an effect on the preformance of the itbs i live in colorado thoghts????

 

[1390]

a guy once told me i wont get the power that guys do at sea level of course but are the worth it in the elevation

 

[signalpuke]

You will have the responsiveness of ITBs, but as stated the power gain will not be as significant as at lower elevation.

 

[scmil95eg]

Well, the air has the same amount of oxygen with or without ITBs. Less oxygen = less power. Honda didn't bolt plenums on the IRL cars when they race(d) in CO.

 

[Texasnick]

Like scmil said, increased elevation will mean a lower concentration of oxygen, which means less power.

There was a thread on this site not too long ago about this very topic

http://k20a.org/forum/showthread.php?t=36621


I would imagine that ITB's would be harder to deal with at higher elevations because of the tuning they require.

If you live in CO, I would seriously consider F/I. We have the same issue here in Calgary. All motor doesn't cut it up here, really.

 

[Ekasey]

Ideally the percentage of the gain wouldn't be any different.

Nothing is harder to "tune" at altitude it's called a barometric pressure compensation as a function of injection

Mapping engines isn;t rocket science.

 

[chunky`]

Having a map sensor to adjust fuel trims is useful if you're between high/low altitutde frequently. If you're running off of a purely TPS based map, then you'll run rich at high altitude if you tune at low altitude and lean at low altitude if you tune at high altitude.

 

[Ekasey]

Having a map sensor to adjust fuel trims is useful if you're between high/low altitutde frequently. If you're running off of a purely TPS based map, then you'll run rich at high altitude if you tune at low altitude and lean at low altitude if you tune at high altitude.

It;s not just useful it's a basic necessity of a good fuel injection system. A properly mapped engine controller should run good in all weather/altitude conditions.

 

[chunky`]

It;s not just useful it's a basic necessity of a good fuel injection system. A properly mapped engine controller should run good in all weather/altitude conditions.

yeah, I personally wouldn't run an ITB setup without some kind of MAP compensation.