The banner above is an advertisment - if it asks you to download software, please ignore.
Site News -
7/1: Members: Log In to See Fewer Ads! |
5/28: SAAB Evolutions/TSN T-Shirts $14
[General |
Members |
C900 |
9000 |
NG900 & OG93 |
93 |
95 |
NG95 |
99 |
Sonett |
Vintage Models |
Clubs |
Other Cars |
FAQs |
Gifts |
Member Photo Galleries |
Member Directory |
Classifieds |
Manuals |
*Buddy Registry |
*Mileage Registry |
Polls |
What's New |
Raffle |
Photo of the Month |
Sponsors]
[Main Performance Bulletin Board | BBFAQ |
Prev by Date | Next by Date | Post Followup ]
Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Re: T-7 High Altitude Upgrades? Any experiences?
Posted by Dean (more from Dean) on Tue, 18 Jan 2005 08:50:54
In Reply to: T-7 High Altitude Upgrades? Any experiences?, Mark in C-Springs, Mon, 17 Jan 2005 14:39:28
Members do not see ads below this line. - Help Keep This Site Online - Signup
The ECU mods that require that you change the stock 3.0 BAR FPR for a 3.5 BAR unit (Nordic) might have some mixture implications that are worth understanding.
With a T7, the ECU will try to compesate for thinner air by working the turbo harder to achieve the same target charge air flows. So the waste gate will be more closed and the back pressure on the turbine, which can be well over 30 PSI, can be even higher. So the temperature of the compressor discharge will be quite high and the intercooler will have a bigger job to do, but the temperatures can be lower in the mountains and that will help. The amount of residual hot gas in the combustion chambers increases which will make the valves, pistons and plugs hotter. That increased octane demand and speaks all the more to a rich mixture. You wull need to run BPCR7ES11's. Clean injectors will help too. Techron Concentrate will also remove some CC deposits which create hot spots that also increase octane demand.
You should be able to specify that the vehicle lives at high altitude and perhaps get an adjusted software load that will help. Note that Hirsch is based in the Alps, so they know all about these things.
posted by 68.91.152...
Posts in this Thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup
Post a Followup
No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.
StateOfNine.com
![](/tsn/xyz/stateofninebutton.gif) |
SaabClub.com
![](/tsn/xyz/scnabutton.gif) |
Jak Stoll Performance
![](/tsn/xyz/jakstollbutton.gif) |
M Car Covers
![](/tsn/xyz/mcarcoversbutton.gif) |
Ad Available
![](/tsn/xyz/buttonavailable.gif) |
![](/tsn/images/tsnmap.gif)
Random Saabnet.com Member Gallery Photos (Click Image)
This is a moderated bulletin board - Posting is a privilege, not a right.
Unsolicited commercial postings are not allowed (no spam). Please, no For Sale or Wanted postings, SERIOUSLY.
Classifieds are to be listed in The Saab Network Classifieds pages.
This is a problem solving forum for over 250,000 Saab owners, so expect to see
problems discussed here even though our cars are generally very reliable. This is not an anything goes
type of forum. Saabnet.com has been a moderated forum since 1988. For usage guidelines, see the
Saabnet.com Mission and Purpose Page. Please remember that you are
not anonymous. Site Contact | Site Donations | Other Sites by SP -
Poverty2Prosperity.org | Run Club Menlo Park | ScreenBot
Site Members do not see red text instructions, bottom of the page anchor ads, or box ads.
Click here to see all
the Site Membership Benefits!