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GalantVR4.ORG Dyno Shootout

RedTwo

Well-known member
Joined
Jul 16, 2008
Messages
1,917
Location
New Zealand

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Updated 02/04/2011
 
Last edited:

RedTwo

Well-known member
Joined
Jul 16, 2008
Messages
1,917
Location
New Zealand
The official merchandising tie-in for the GalantVR4.ORG 1/4 mile leaderboard!

GVR4.ORG Dyno Shootout FAQ:

1) My mate's car isn't on here? How does he get on?
To get on this list you must comply with all of the following:
a) Must have a galantVR4.org user account.
b) Must be your car (or teams car in the case of race teams).
c) Must be a Mitsubishi car with a E3XA chassis code.
c) Must be actual measured values from a dynamometer, not an estimated or calculated values.

2) Ok, I've checked all the right boxes, how do I get on there?
There are a few ways to get on the list:
a) Send me a PM with your dyno data - the more numbers the better /ubbthreads/images/graemlins/laugh.gif
b) Make a new topic about your latest dyno escapades.
c) Post your run data in here (links to images is better than an embedded photo)

3) What kind of gas is 93? My petrol station only sells 98!
Fuel used is measured in AKI, which is a mean rather than a hopeful maximum - AKI is generally 4-5 points lower than the same RON; 98 RON = 93 AKI.

4) Oh Noez! You've got something wrong!
If you spot a mistake, typo or otherwise incorrect or missing information please let me know so I can fix it up.

5) Your layout is pretty rough/messed up/looks like dogs balls...
Yes, UBB doesn't like tables unlike HTML, but my xoom.com webpage is down at the moment...

6) Hey, where are all my old dyno runs?
To prevent cluttering and smothering the shootout, people will only have their best engine output listed. However, I am still recording all dyno runs for shits and giggles.

7) If you're recording everything, can you tell me what the record with xxx is?
Sure, drop me a PM with what you're after and I'll try and provide an answer.

8) Where do I go if I click on these links in the leaderboard?
If available, clicking the badge number will take you to the members ride page, the chart to a dyno plot and the sound board with a green dot to a video of the dyno run.

9) FWD? I thought VR4's were AWD!?
a) 4WD dynos are not available in all areas. Also, a dyno run in FWD should produce a slightly higher power figure at the wheels due to less drivetrain loss.
b) Some cars are 2WD (Yes, not just FWD!)

10) Why is the type of dynamometer important?
Simply put, each brand has a different method of measuring engine output, be it directly from the drivetrain (hub dyno) or from rollers driving the wheels (rolling road dyno), which may lead to differences in measured output. Oh, and people swear black and blue that one brand 'reads low' compared to another.
 
Last edited:

Chim55117

Well-known member
Joined
May 7, 2007
Messages
429
Location
Little Canada, Minnesota, United States
Update here. Last dyno I did was 25PSI on my 20G setup with 46/1000, 388WHP and 344TQ on a Dynojet.

Looks nice though! Thanks for doing this!
 
Last edited:

1192/2000 just put down 330whp and 300tq on boomba's mustang dyno with a 2.0L and a pte 32/55e turbo on 93oct at 20psi.
 
Last edited by a moderator:

H05TYL

Well-known member
Joined
Jun 9, 2007
Messages
752
Location
Wgtn, NZ
Could I get an edit please?

H05TYL | JDM VR4 | 2.0 | 93 | 16G | 15 | 253 | 5750 | 597 (at teh wheels not flywheel) | Dynojet | 04/09/2010
 

turbowop

Well-known member
Joined
Apr 29, 2001
Messages
11,971
Location
Yakima, WA
Quoting H05TYL:
Could I get an edit please?

H05TYL | JDM VR4 | 2.0 | 93 | 16G | 15 | 253 | 5750 | 597 (at teh wheels not flywheel) | Dynojet | 04/09/2010




253whp and 597 torque? /ubbthreads/images/graemlins/rofl.gif

Am I reading that wrong or did you make a typo?
 
Last edited:

Nartanian

Well-known member
Joined
Jan 14, 2009
Messages
611
Location
Richfield, MN
Nope, vtech kicked in.
 

RedTwo

Well-known member
Joined
Jul 16, 2008
Messages
1,917
Location
New Zealand
Quoting turbowop:
Quoting H05TYL:
Could I get an edit please?

H05TYL | JDM VR4 | 2.0 | 93 | 16G | 15 | 253 | 5750 | 597 (at teh wheels not flywheel) | Dynojet | 04/09/2010




253whp and 597 torque? /ubbthreads/images/graemlins/rofl.gif

Am I reading that wrong or did you make a typo?



That seems a little high - I think he left off the '1' in front of the '253' /ubbthreads/images/graemlins/laugh.gif
 

H05TYL

Well-known member
Joined
Jun 9, 2007
Messages
752
Location
Wgtn, NZ
Quoting turbowop:
Quoting H05TYL:
Could I get an edit please?

H05TYL | JDM VR4 | 2.0 | 93 | 16G | 15 | 253 | 5750 | 597 (at teh wheels not flywheel) | Dynojet | 04/09/2010




253whp and 597 torque? /ubbthreads/images/graemlins/rofl.gif

Am I reading that wrong or did you make a typo?



Like I said, tis torque measured at the wheels (or tractive effort if you prefer), I'll take a photo of the sheet and post it up tomorrow if you like.
You could work out torque at the engine if you really wanted to - you divide the wheel torque by the overall reduction ratio. The overall reduction ratio is found by multiplying together the primary reduction ratio between the crankshaft and the transmission's input shaft, the final reduction ratio between the transmission's output shaft and the rear wheel, and the transmission ratio that depends on the specific gear that was used during the dynamometer run.
I think the run was done in 4th, but I can't remember for sure.

It'll still seem on the high side though, because boost was hitting 18psi then dropping off - peak torque was made with 18psi, peak power with only 15psi.
 

turbowop

Well-known member
Joined
Apr 29, 2001
Messages
11,971
Location
Yakima, WA
Oh wait...so you're serious? There's no way that's an accurate torque reading. /ubbthreads/images/graemlins/confused.gif Especially for a 16g at 15psi.
 
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turbowop

Well-known member
Joined
Apr 29, 2001
Messages
11,971
Location
Yakima, WA
Quoting 4thStroke:
Where's 1051?

Mark, bring the car out for Luke's dyno day next month.



Unlikely. I'll probably still be skiing. That, and I'd rather go when it's not a rush to get the car on and off the dyno due to so many others waiting to get on. It's kind of a circus with that many people trying to dyno in one day. One of these days I'll dyno my heap.
 

slugsgomoo

Well-known member
Joined
Oct 16, 2003
Messages
3,776
Location
Tacoma, WA
correct me if I'm wrong, but dyno with a dsm gearbox should be done in 3rd since it's closer to 1:1 (not significantly overdriven like 4th) not to mention 4th gear is the weakest, and most sensitive to power + heat related destruction.
 

H05TYL

Well-known member
Joined
Jun 9, 2007
Messages
752
Location
Wgtn, NZ
Quoting turbowop:
Oh wait...so you're serious? There's no way that's an accurate torque reading. /ubbthreads/images/graemlins/confused.gif Especially for a 16g at 15psi.



Can't believe you can't get your head round the fact it's torque measured at the wheels, thus engine torque multiplied by the total final drive ratio.

DSCF1814.jpg


Here's one from a 362whp skyline...
LITHGT30R.jpg


and here's an example of the differing torque at the wheel in each gear from a motorbike (commonly refered to as thrust curves, not very often done with cars as most dyno's can't cope with the sort of torque produced in lower gears).
Thrust.jpg
 

FCR

Well-known member
Joined
May 17, 2008
Messages
121
Location
Orlando, FL
My info

badge 1352/200
litre 2.3
fuel 93
turbo 3082r
psi 20
whp 440.7
rpm 7200
ft/lbs 435.8
dyno dynojet
date 12/17/2008
video click
 

turbowop

Well-known member
Joined
Apr 29, 2001
Messages
11,971
Location
Yakima, WA
Quoting H05TYL:
Quoting turbowop:
Oh wait...so you're serious? There's no way that's an accurate torque reading. /ubbthreads/images/graemlins/confused.gif Especially for a 16g at 15psi.



Can't believe you can't get your head round the fact it's torque measured at the wheels, thus engine torque multiplied by the total final drive ratio.






I guess I don't get it then. /ubbthreads/images/graemlins/confused.gif Everybody that posts dyno sheets usually show roughly the same differences when it comes to the correlation between WHP/torque. I assume that when people post WHP numbers, the torque is measured at the wheels as well? And usually the torque is less than the WHP number or right near it. Yours is waaaaaaay off, hence my confusion. /ubbthreads/images/graemlins/dunno.gif
 
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H05TYL

Well-known member
Joined
Jun 9, 2007
Messages
752
Location
Wgtn, NZ
Here's an old sheet of mine showing Flywheel torque.

DSCF1815.jpg


Convert the numbers into hp and ftlbs and they are about even.


If you look at the 2nd graph I posted before (for the skyline) you'll see it's labelled torque at the wheels, and the number is HUGE.

It would appear that a lot of dyno's convert the torque to a flywheel figure even when the hp is displayed as an at the wheels figure? Something to ask a dyno guy about perhaps?
 

4thStroke

Well-known member
Joined
Oct 22, 2007
Messages
1,864
Location
Vancouver, WA
Most dynos give you both (horsepower and torque) readings at the wheels.

The value of the 2nd graph would be even larger if it was a flywheel rating.
 
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