Re: Saabines 281 hp is flywheel hp, not at wheels... - Saab Performance Bulletin Board - Saabnet.com
The banner above is an advertisment - if it asks you to download software, please ignore.
Site News -
[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: Saabines 281 hp is flywheel hp, not at wheels...
Posted by Eric (9-3 Hirsch) (more from Eric (9-3 Hirsch)) on Mon, 23 May 2005 13:13:49
In Reply to: Re: Saabines 281 hp is flywheel hp, not at wheels..., GM, Sun, 22 May 2005 12:43:55
Members do not see ads below this line. - Help Keep This Site Online - Signup
The dyno uses a rundown where the operator puches in the clutch and the dyno calculates the hp drag caused by the drivetrain up to the clutch. This loss is added to the wheel hp to give the flywheel hp. I can agree that it is probably not highly accurate but it is much better than simply saying x% loss for a given car. Heck, just by virtue of different grip levels, tires probably eat-up different levels of hp that actually turns into forward motion.
As you can see in my dyno plot from Hirsch, my car used 41.4 ps on the rundown. When added to the wheel hp of 200.6 ps, equals 242.0 ps at the flywheel. It was then corrected to standard atmospheric conditions to give 260.4 ps.
posted by 153.26.17...
9-3 Hirsch dyno
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
|
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!