Dyno Sheet
[Edited on 2-3-2004 by Craig Torrens]
Craig Torrens 6 times Australian, 7 times State Hillclimb Class Champion
8,040 posts · joined Jan 2003 ·
xx
MickH Hairy Gutted Sloth
3,389 posts · joined Sep 2003 ·
!!!!!!!!😀
tssnq.com.au
wibble Freakinbuggied
404 posts · joined Jan 2003 ·
is that rear wheel or flywheel??
HotRodMatt If it\'s old or rare - cut it!
3,616 posts · joined Sep 2002 ·
At the wheels.
56astro Custom Title Time!
1,772 posts · joined Aug 2002 ·
I love that sort of talk!wibble wrote:is that rear wheel or flywheel??
😎
VW car, VW engine ...... keepin it "real"
35MPG on 101.3kPa
Gracey Wolfsburg Wizard
511 posts · joined Feb 2003 ·
Thanks Craig, I was just about to ask you if you had it yet.😀
I must say that looks like a Honda torque curve...........very flat:thumb:thumb
Andrew Grace
I must say that looks like a Honda torque curve...........very flat:thumb:thumb
Andrew Grace
Cam Custom Title Time!
1,535 posts · joined Aug 2002 ·
AMG beat you all :P
56astro Custom Title Time!
1,772 posts · joined Aug 2002 ·
where has the dyno sheet gone??
VW car, VW engine ...... keepin it "real"
35MPG on 101.3kPa
Desert Moose Cut Cut Cut
2,098 posts · joined Mar 2004 ·
What this one ......lol56astro wrote:where has the dyno sheet gone??
Alex Holzl 2332cc of pure BALLZ!!
1,550 posts · joined Jan 2004 ·
gotta bigga one
Desert Moose Cut Cut Cut
2,098 posts · joined Mar 2004 ·
I will try again................ yes its bigger but it fuzzy :cry
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pete wood 23 Windows of Awesome
6,828 posts · joined Jan 2004 ·
So what does craig's slip look like?
Doesn't show up on my puter screen 🙁
Doesn't show up on my puter screen 🙁
"stoopid is stronger than axles"
http://drivingnotpolishing.blogspot.com.au/
http://drivingnotpolishing.blogspot.com.au/
fullnoise Fahrvergnugen
964 posts · joined Sep 2002 ·
Deja vu. I have a headache.:cry
esratrams
gayanne Officially Full-On Dubber
307 posts · joined May 2004 ·
MickH Hairy Gutted Sloth
3,389 posts · joined Sep 2003 ·
You will lose power through the gearbox. If the engine had 200hp at the flywheel it would not have the same at the rear wheels.
tssnq.com.au
Gracey Wolfsburg Wizard
511 posts · joined Feb 2003 ·
Even motorcycles experience HP loss through their drivetrain and they one of the most efficient. Around 5% for chain and sprockets.
HotRodMatt If it\'s old or rare - cut it!
3,616 posts · joined Sep 2002 ·
All gearboxes reduce HP.
Just need to look at all the work that Dyno Dynamics have done testing hundreds of engine/trans so that their chassis dynos can provide a calculated back to the flywheel figure if desired.
Even the direct drive of a Top Fueler looses HP through the clutch.
Just need to look at all the work that Dyno Dynamics have done testing hundreds of engine/trans so that their chassis dynos can provide a calculated back to the flywheel figure if desired.
Even the direct drive of a Top Fueler looses HP through the clutch.
AdrianH Officially Full-On Dubber
257 posts · joined Mar 2004 ·
Work on about 15% loss, so 121@wheels = 140@the fly...
Think about that 80 weight oil being squeezed outta teeth, theres a reason it gets hot... friction
Think about that 80 weight oil being squeezed outta teeth, theres a reason it gets hot... friction
gayanne Officially Full-On Dubber
307 posts · joined May 2004 ·
Lots of expert opinions and all constructive,it still comes down to diff ratios working threw Gboxes and tyres.Percentage Hp for rear engines is 5% to10% this info comes from Goodman Race Engines ,gives us somthing to think about when doing Dyno runs to Track runs.JVLRacing
[Edited on 30-6-2004 by gayanne]
[Edited on 30-6-2004 by gayanne]
Desert Moose Cut Cut Cut
2,098 posts · joined Mar 2004 ·
I want Goodman to build me a transaxle. yahoo only 1%Craig Torrens wrote:What drugs are you on !!!gayanne wrote:
And NO, Stan would not agree.
And if Goodman engines think that you only loose 1% of your horsepower through a gearbox well........................
humpty Bishop of Volkswagenism
3,336 posts · joined Sep 2002 ·
Any spec on the Pobjoy donk or are we liven a dream?
As for loosing power through the trans...Gene Berg told me 15 years ago that you can expect around 15% loss, minimum.
My little 1776 made a best quarter of 14.8 and no special trans ratios....
So what can I expect for HP.
Never dyno'd it, may have to some day!
Keep in mind my engine is now over 10 years old!
[Edited on 30-6-2004 by humpty]
As for loosing power through the trans...Gene Berg told me 15 years ago that you can expect around 15% loss, minimum.
My little 1776 made a best quarter of 14.8 and no special trans ratios....
So what can I expect for HP.
Never dyno'd it, may have to some day!
Keep in mind my engine is now over 10 years old!
[Edited on 30-6-2004 by humpty]
seagull Compulsive Aussie Vee Dubber
4,979 posts · joined Dec 2003 ·
Simon may be perth should have a vw dyno day ??
Looking for that special lady : PM me for coffee & cake
humpty Bishop of Volkswagenism
3,336 posts · joined Sep 2002 ·
I know Myaree Dyno tune have dyno days from time to time. Everyone turns up, big blocks to cosworths....Be nice to see a certain red Notch there!, Maybe my bug too!
Desert Moose Cut Cut Cut
2,098 posts · joined Mar 2004 ·
What a top idea !!! who in perth has a Dyno Dynamics dyno..:thumbseagull wrote:Simon may be perth should have a vw dyno day ??
[Edited on 30-6-2004 by Desert Moose]
Peter Leonard Moderator Volatile
1,456 posts · joined Apr 2003 ·
humpty, first we need to know what the car weighed.
let sleeping dubs lie
gayanne Officially Full-On Dubber
307 posts · joined May 2004 ·
Craig Torrens wrote:What drugs are you on !!!gayanne wrote:
And NO, Stan would not agree.
And if Goodman engines think that you only loose 1% of your horsepower through a gearbox well........................
AdrianH Officially Full-On Dubber
257 posts · joined Mar 2004 ·
Not trying to start a shit fight, but is it possible to have a look at the specs on a Pobjoy ? Cam ? compression ? etc... or do you have to sign a confidentiality agreement or something before buying one??
Ive picked up little tidbits of info, looking for some substance !!!
Ive picked up little tidbits of info, looking for some substance !!!
Craig Paton Wolfsburg Wizard
620 posts · joined Apr 2004 ·
Me to Adrian!!
These Dynamic Dyno's do they take into account horsepower sapping high altitude??
Craig P.:bounce
These Dynamic Dyno's do they take into account horsepower sapping high altitude??
Craig P.:bounce
Baja Wes V6 Baja Pioneer
3,119 posts · joined Aug 2002 ·
RE: gearbox losses.
as others have said, use 15% as a minimum.
Most dyno operators will use about 17%. This is right for most modern vehicles, and mainly front wheel drives. FWD cars has efficient gearboxes as each gearset is parallel to the next.
VW's are older designs, and has a ring and pinion, which is not very efficient. Kombi gearboxes are less efficent than beetle gearboxes. VW gearbox'es seem to be losing somewhere between 20 and 25%.
It the helical gears that suck the power. The helix angle forces some of the torque to be transmitted, and some of it to be wasted in a thrust force.
This is why race cars use striaght cut gears in their gearboxes. They don't have the inefficency problems of helical gears.
Motorcycles almost always use straight cut gears, that is why they are much more efficient.
as others have said, use 15% as a minimum.
Most dyno operators will use about 17%. This is right for most modern vehicles, and mainly front wheel drives. FWD cars has efficient gearboxes as each gearset is parallel to the next.
VW's are older designs, and has a ring and pinion, which is not very efficient. Kombi gearboxes are less efficent than beetle gearboxes. VW gearbox'es seem to be losing somewhere between 20 and 25%.
It the helical gears that suck the power. The helix angle forces some of the torque to be transmitted, and some of it to be wasted in a thrust force.
This is why race cars use striaght cut gears in their gearboxes. They don't have the inefficency problems of helical gears.
Motorcycles almost always use straight cut gears, that is why they are much more efficient.
Wes - www.offroadvw.net - 200HP Quad Cam V6 in a VW Baja - with climate control... 🙂
www.taylorcycles.com.au - My DH MTB racing brothers shop.
www.taylorcycles.com.au - My DH MTB racing brothers shop.
gayanne Officially Full-On Dubber
307 posts · joined May 2004 ·
TextWell said baja wes you have done your homework top stuff and i should of explained myself better.Talking Racecars to standard cars is a lot different.Thanks JVLRacingBaja Wes wrote:RE: gearbox losses.
as others have said, use 15% as a minimum.
Most dyno operators will use about 17%. This is right for most modern vehicles, and mainly front wheel drives. FWD cars has efficient gearboxes as each gearset is parallel to the next.
VW's are older designs, and has a ring and pinion, which is not very efficient. Kombi gearboxes are less efficent than beetle gearboxes. VW gearbox'es seem to be losing somewhere between 20 and 25%.
It the helical gears that suck the power. The helix angle forces some of the torque to be transmitted, and some of it to be wasted in a thrust force.
This is why race cars use striaght cut gears in their gearboxes. They don't have the inefficency problems of helical gears.
Motorcycles almost always use straight cut gears, that is why they are much more efficient.