Some interesting information on dyno's, educate yourself!

Reply Subscribe

Thread Tools

Search this Thread

Nov 26, 2008 | 01:15 AM

#16

cvt

Registered User

Joined: Apr 2006

Posts: 1,499

Likes: 8

From: Los Angeles

Quote:

Originally Posted by sharif@forged

It's the delta that is important, and the area under the curve.

+1

this is the whole point of the dyno..somewhere along the line it became a ***** measuring stick...thank God for that as it clearly shows who the newbs are.

Nov 26, 2008 | 07:56 AM

#17

w0ady

Registered User

iTrader: (1)

Joined: Apr 2006

Posts: 4,563

Likes: 0

From: jacksonville, fl

Quote:

Originally Posted by sharif@forged

Anyone know German?

I have always told my customers, that the absolute number means very little. It's the delta that is important, and the area under the curve. Our dyno reads retarded low, but we dont care..it's great for steady state tuning, and our cars are faster.

yup gains are what matters. which is why its best to do a baseline and dyno after each mod if possible.

Quote:

Originally Posted by cvt

+1

this is the whole point of the dyno..somewhere along the line it became a ***** measuring stick...thank God for that as it clearly shows who the newbs are.

highly agreed.

Nov 26, 2008 | 09:31 AM

#18

jnifong

Registered User

Joined: Nov 2007

Posts: 81

Likes: 1

...and until someone, somewhere comes up with a dyno protocol that everyone follows, it's not realistic to compare one car to another since lots of people dyno different ways. i.e. pulling in different gears on different dyno machines looking for which one gives them the best numbers to brag about. Until then, dynos are really best to measure personal gains and are only truthful when tested while all other vairables are the same such as the same dyno, from the same gear, ideally at the same temperature (although not always possible), altitude, etc. If you bolt on a part, and keep doing pulls different ways to find the gain you want, you're cheating yourself. But we is smart people and we be knowing that already

Jon

____________________________
'08 G37S Black/Black 6MT | Navi | Premium

Get your wrong on:

http://www.sheepholetees.com/main.php

Dec 3, 2008 | 04:21 AM

#19

AZg37

Thread Starter

Premier Member

iTrader: (17)

Joined: Apr 2008

Posts: 1,357

Likes: 46

From: Peoria, AZ

MaHa dyno sheet

http://www.goodspeedperformance.com/...g37%20cobb.pdf

my drivetrain loss is 81HP!!! Damn! I don't know about the other number because they are uncorrected. I don't even know what a stock G would make for a comparison, or what my G made before the partial cobb tune. I really have no answers, just this cool dyno sheet that reads lightyears lower then any other dyno I've ever been on. Oh Well

Last edited by AZg37; Dec 3, 2008 at 04:24 AM.

Dec 3, 2008 | 08:53 AM

#20

matrix311

Registered User

Joined: Mar 2008

Posts: 32

Likes: 0

Quote:

Originally Posted by AZg37

hey atleast you know your numbers are truly accurate and ouch on the drivetrain loss, thats AWD numbers right there for loss.

Dec 3, 2008 | 05:46 PM

#21

shabbo

Registered Member

Joined: Dec 2007

Posts: 324

Likes: 0

From: Miami

Quote:

Originally Posted by AZg37

AG I think your Maha dyno HP #s should be ~10% higher because the dyno only shows HP peak at 6900 rpm when you can go to 7600+ rpm with your mods.

The parasitic losses calculated could also be accurately recorded with Automatics vs Manual Transmissions.

These results look very convincing. I also like the way the results show rotating mass values! Thanks for the write up!