Speed density and altitude change
Thread Starter
On The Tree
Joined: Jan 2016
Posts: 100
Likes: 0
From: Colorado
Speed density and altitude change I've done some research and I can't seem to find any supported answers or anything. So figured I would post a thread and see if anyone has some info on it.
SD is more sensitive to altitude changes than MAF but not a big difference.
The problem is (and the same happens with MAF) when the car is tuned at high altitude, it will not hit the lowest part of the VE table. For example in my city we have 85 KPa at WOT, can't tune 90 and higher MAP values.
When you drive the car to a lower altitude it will see higher MAP at WOT, those untuned cells may be rich or lean depending on the tuner.
OLSD is the more sensitive to altitude changes, but it works good. As long as it was properly tuned you won't see a difference. There are millions of cars running SD from factory.
The problem is (and the same happens with MAF) when the car is tuned at high altitude, it will not hit the lowest part of the VE table. For example in my city we have 85 KPa at WOT, can't tune 90 and higher MAP values.
When you drive the car to a lower altitude it will see higher MAP at WOT, those untuned cells may be rich or lean depending on the tuner.
OLSD is the more sensitive to altitude changes, but it works good. As long as it was properly tuned you won't see a difference. There are millions of cars running SD from factory.
Thread Starter
On The Tree
Joined: Jan 2016
Posts: 100
Likes: 0
From: Colorado
Ohhh okay right on. I was curious because I live in Colorado and was maybe taking a trip to California and didn't know if I would get halfway there and it start running like poo. Thanks for your reply!
