Re: Ok

The above is an advertisment. If it asks you to download software or create an account, please ignore it. Site News - 7/11: No New News Today | 5/10: Members: Log In to See Fewer Ads!

Performance Bulletin Board
[Subscribe to Daily Digest]

(Search Author's Posts: e.g. Keyword:username) *Members Only

[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: Ok Posted by vigge [Email] (more from vigge) on Mon, 3 Apr 2006 23:18:32

In Reply to: Ok, SteveW, Mon, 3 Apr 2006 16:31:38 Members do not see ads below this line. - Help Keep This Site Online - Signup

----------------
While not yet retracting that statement, I have been sitting here waiting for a call and did some research. The questions I raise are, does a boost gauge reference to a set load (like a spring), or to atmosphere? How does a MAP sensor reference? A MAF car does not relate to differentials, just airflow. If (again taking into account turbo capabilities) the most basic of turbo control systems just use a preset wastegate control, which is boost pressure against a spring, won't that car reach the same pressure at elevation?
----------
Usually a boost comprises of a membrane and a spring. One side of the membrane is open to atmosphere and the other is connected to the boost tap.

Preset wastegate on the other hand does not behave in the same manner, since the "other side" of the membrane is not open to atmosphere, it is sealed. A car with preset wastegate will run higher boost at altitude. This is due to the fact that the air pressure with in the wastegate clock is higher than ambient, so it reguires more boost to open it.

posted by 81.197.250...

Posts in this Thread:

how is boost measured?, LesH, Sat, 1 Apr 2006 14:22:01
- Power Loss at altitude, nikos, Sat, 1 Apr 2006 18:09:17
  - also intercoolers become less efficient, jak , Sat, 1 Apr 2006 21:22:51
    - keeping it simple, vigge, Sat, 1 Apr 2006 23:28:09
      - I would never argue how much is lost, jak , Sun, 2 Apr 2006 09:13:06
      - To add to the above, Vigge, Sun, 2 Apr 2006 08:32:25
    - Re: also intercoolers become less efficient, soneway, Sat, 1 Apr 2006 23:26:46
- Re: how is boost measured?, Dean, Sat, 1 Apr 2006 15:36:25
  - Less oxygen per volume..., John Williams , Sun, 2 Apr 2006 09:07:57
  - Re: how is boost measured?, Vigge, Sun, 2 Apr 2006 03:23:34
    - Re: how is boost measured?, Dean, Mon, 3 Apr 2006 23:03:04
    - short overlap :-), jak , Sun, 2 Apr 2006 21:13:34
    - Re: how is boost measured?, vigge, Sun, 2 Apr 2006 08:28:04
      - thats a valid point on pre turbine exaust pressure, jak , Sun, 2 Apr 2006 11:57:31
        oops, jak , Sun, 2 Apr 2006 11:59:46
        A good link about this, SteveW, Sun, 2 Apr 2006 16:12:00
        02 not constant by volume..., John Williams , Mon, 3 Apr 2006 08:17:06
        Finally a way to understand this oxygen per volume., John Williams , Mon, 3 Apr 2006 08:55:40
        Re: Finally a way to understand this oxygen per volume., vigge, Mon, 3 Apr 2006 12:13:55
        do you have the slip on this viggen at 5000 feet?, jak , Mon, 3 Apr 2006 20:35:00
        Re: do you have the slip on this viggen at 5000 feet?, vigge, Mon, 3 Apr 2006 23:20:55
        yeah I asked back trhen but never got them, jak , Mon, 3 Apr 2006 23:28:52
        I dissagree, SteveW, Mon, 3 Apr 2006 14:24:49
        Re: I dissagree, Vigge, Mon, 3 Apr 2006 22:47:36
        Ok, SteveW, Mon, 3 Apr 2006 16:31:38
        Re: Ok, vigge, Mon, 3 Apr 2006 23:18:32 <-- Viewing This Message
        Re: Finally a way to understand this oxygen per volume., John Williams , Mon, 3 Apr 2006 14:14:43
        Re: Finally a way to understand this oxygen per volume., vigge, Mon, 3 Apr 2006 23:26:31
        Ok Vigge, will you help me figure all this out?, John Williams , Tue, 4 Apr 2006 09:11:44
        Re: Ok Vigge, will you help me figure all this out?, Vigge, Tue, 4 Apr 2006 10:04:26
        Re: Ok Vigge, will you help me figure all this out?, John Williams , Tue, 4 Apr 2006 15:48:46
        Re: Ok Vigge, will you help me figure all this out?, vigge, Wed, 5 Apr 2006 13:35:56
        Re: Ok Vigge, will you help me figure all this out?, John Williams , Wed, 5 Apr 2006 14:07:39
        Re: Ok Vigge, will you help me figure all this out?, Vigge, Wed, 5 Apr 2006 14:20:01
        Well, I will say this, its hot!!!, John Williams , Fri, 7 Apr 2006 08:22:42
        Re: Well, I will say this, its hot!!!, vigge, Fri, 7 Apr 2006 12:23:30
        Re: Well, I will say this, its hot!!!, John Williams , Sat, 8 Apr 2006 06:07:04
        Re: Well, I will say this, its hot!!!, vigge, Sat, 8 Apr 2006 12:24:38
        Mid-way on delivery pipe is 142F, John Williams , Sun, 9 Apr 2006 13:03:59
  - absolute pressure, jak , Sat, 1 Apr 2006 21:11:16
    - Re: absolute pressure, TML , Mon, 3 Apr 2006 02:15:43
      - yeah I think you are rite pre98, jak , Mon, 3 Apr 2006 09:22:35

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.

Name: Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
E-Mail: (Optional)
Re-Enter E-Mail: (Confidential & Secure - Not revealed to other users!)
Note: Please check your spam folder for BB responses.

Subject:

Posting rules are simple - No for sale/wanted ads may be posted here - use the site classifieds.
You may not cross-post your message to multiple BBs.
Not permitted: political/religious topics and being disrespectful (personal attacks, insults, etc...).
Site Members do not see any red text, inline ad links, bottom of page anchor ads, box ads, or anti-spam check.

Message: (please no for sale/wanted classifieds - post those in the Saabnet.com Classifieds)
Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).

Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post above, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).
Optional Link: (e.g. http://www.saabnet.com/)
Link Title: (Optional)
Optional Photo/Image Link: (e.g. http://www.saabnet.com/img.jpg)
Photo/Image to Upload: (Please be patient while file uploads)

Prev by Date: Re: how is boost measured?, Dean, Mon, 3 Apr 2006 23:03:04
Next by Date: Re: do you have the slip on this viggen at 5000 feet?, vigge, Mon, 3 Apr 2006 23:20:55
Main Performance Bulletin Board

StateOfNine.com

SaabClub.com

Jak Stoll Performance

M Car Covers

Ad Available

The content on this site may not be republished without permission. Copyright © 1988-2025 - The Saab Network - saabnet.com.
For usage guidelines, see the Mission & Privacy Notice.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]

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!

The content on this site may not be republished without permission. Copyright © 1988-2025 - The Saab Network - saabnet.com. For usage guidelines, see the Mission & Privacy Notice. [Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]

The content on this site may not be republished without permission. Copyright © 1988-2025 - The Saab Network - saabnet.com.
For usage guidelines, see the Mission & Privacy Notice.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]