There is always more to it than money... long - Saab Performance Bulletin Board - Saabnet.com
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
There is always more to it than money... long
Posted by Dean (more from Dean) on Sun, 15 Sep 2002 19:09:36
In Reply to: Re: Why did Saab switch from Garrett to Mitsubishi on Aero?, StanleyB, Sun, 15 Sep 2002 15:41:52
Members do not see ads below this line. - Help Keep This Site Online - Signup
It is always about money, but sizing and turbo efficiency are important factors too. With the HP being increase beyond 185, the limits of the T25 were probably getting painfully obvious. See my other LONG post in this thread for my thinking about the T25's limitations. And after 5 or 6 years, there would have been advances in turbo chargers to take advantage of too. And what turbo charger manufacturer would not compete on price to supply Saab which has been producing turbo charge vehicles for over 25 years? The Mitsu model might have presented a turbo sizing sweet spot too.
But with the VTN turbos coming on with the new 2003 models, the variable geometry turbine trim really turns the whole sizing issue on its head as these turbos have much broader efficiency curves. This is definately not about money. The VTN turbos are not cheaper! They allow for fast turbo spin up from idle and much better efficiencies at high CFM's. A waste gate type turbo can't do that! Did you know that a VTN turbo has no wastegate? It is about time that Saab intro'd this turbo technology. It has been around for quite a while now. Don't think that you can adjust the VTN actuatator rod! With some known implementations, to get the low RPM boost, the turbos are dancing on the edge of severe compressor surge. Some VTN's, not re-adjusted, on vehicles with other engine performance mods have grenaded. Operation at higher altitudes seems to make this more of a risk.
posted by 65.68.10...
Posts in this Thread:
- Why did Saab switch from Garrett to Mitsubishi on Aero?, J, Sun, 15 Sep 2002 14:34:49
- Re: Why did Saab switch from Garrett to Mitsubishi on Aero?, sean, Sun, 15 Sep 2002 19:54:24
- Re: Why did Saab switch from Garrett to Mitsubishi on Aero?, StanleyB, Sun, 15 Sep 2002 15:41:52
- the TD04 is better than the T25, nickR, Sun, 15 Sep 2002 14:53:03
- Not "better" but capable of higher boost, Alex, Sun, 15 Sep 2002 17:11:08
- TD04 laggier than T3?, gorper, Mon, 16 Sep 2002 01:59:43
- T3 Aero?, Kevin K , Sun, 15 Sep 2002 21:20:13
- Re: Not "better" but capable of higher boost, Roger Wilco, Sun, 15 Sep 2002 20:55:57
- thanks ... I won't give out the site to search engines, J, Sun, 15 Sep 2002 18:49:26
- Technically true but..., nickR, Sun, 15 Sep 2002 17:33:08
- ... capable of producing higher boost?, J, Sun, 15 Sep 2002 14:55:49
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
|
SaabClub.com
|
Jak Stoll Performance
|
M Car Covers
|
Ad Available
|
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!