you are also wrong ..... - Saab 900 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]
....... regarding same boost, same engine, diff turbos. You are right in that a ported engine will produce more hp then stock, for a given turbo and boost.
A proper turbo upgrade will give more cfm and hp than the smaller, for a given high boost, and engine, and high rpm. It is for these reasons.
1) the larger turbo will have less back pressure, esp if one is pushing for 30% more hp than stock. This backpressure is due to basic restricions of the smaller turbine, and also the fact that the small turbo creates more heat energy in addition to the pressurised flow, so it works harder. This means the VE of the engine increases, since less exh gas is left in the chambers when the intake opens, so more cfm is possible. The reduced back pressure also means less pumping losses, so more hp goes to the wheels.
2) the bigger turbo will be compressing the air more efficiently. So the boosted air will be more dense, providing more engine hp (and less chance of detonation) at the same boost.
So for the same boost, you get more cfm of cooler air, with less hp losses related to pumping out the exhaust and compressing the intake charge.
Posts in this Thread:
- how much boost can the stock turbo put out?, Jordan, Tue, 3 Oct 2000 23:02:34
- Re: how much boost can the stock turbo put out?, Seth Strait, Wed, 11 Oct 2000 21:23:29
- Anyone noticed the elimination of lag on 9000's..., cutic, Wed, 4 Oct 2000 20:30:48
- Max PSI isn't as important as tuned PSI----->>>, Physh, Wed, 4 Oct 2000 20:05:05
- You guys don't seem to understand..., Bond, Wed, 4 Oct 2000 14:57:59
- (Super Long), Jeff Cunningham\, Wed, 4 Oct 2000 10:20:20
- Re: how much boost can the stock turbo put out?, GM, Wed, 4 Oct 2000 00:32:04
- Re: how much boost can the stock turbo put out?, Kevin K
, Wed, 4 Oct 2000 00:15:07 - You're Crazy, Kodiak, Tue, 3 Oct 2000 23:08:28
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!