Dyno Day Results - 8th November 2008

[GroundControl]

Great day, awesome weather, and good to catch up with people again :)

Overall I think most people were pretty happy with their results (especially Kenneth's Galant).

I got 182.7kW ATW at 13.4 psi, only mod is an Electronic Boost Controller. Hit fuel cut on the rollers at anything over that. Most happy with how it held the boost though, and the increase in torque and power through the mid range.

First pic is dyno graph, second pic is same graph overlaid on my 'stock' run from 2 years ago (red = today's run, blue = previous).

My photos are here: http://www.sam.net.nz/gallery/v/cars/dynoday-8nov2008/

[bradc]

My ST-R also beat a twin turbo Legacy, so that made me happy :)

I got 98.9kw, so close to my goal of 100kw. The graph did spike to over 100kw briefly, but they round the graphs and straighten them out quite a bit so I ended up with just under 100kw :(

[Goku]

Wait.... a TT legacy has less than 100kw atw ?

ahhhhahahahaha that makes me happy :D

[OnBoost!]

Yeah it was..but it had some problems..:laugh:

[GroundControl]

Haha you can hardly call that a legit victory Brad :p

The legacy was having fuelling issues, so the aborted the run.

[Kieran]

Interesting that with no other modifications, your AFR on boost doesn't go below 11.0.

Also... 182 KW at the wheels is 247bhp - That's very good for just an EBC! :afro:

[GroundControl]

Yeah I'm pretty pleased :)

Have added a link in the first post to some photos from my camera. Unfortunately I don't know whose some of the results are, so feel free to let me know and I'll fix up the captions (or if you want plates obscured, etc)

[Kenneth]

Yeah, I am deffinately happy!

191.9KW ATW will do me for now :D

[Kenneth]

My ST-R also beat a twin turbo Legacy, so that made me happy :)

I got 98.9kw, so close to my goal of 100kw. The graph did spike to over 100kw briefly, but they round the graphs and straighten them out quite a bit so I ended up with just under 100kw :(

Looks like the figure you are talking about is the raw, uncorrected power figure. When the correction factor was added you went below 100KW.

[Kenneth]

And Congratulations to William who won the years membership for the best power on the day by a member, beating Dave (Subaru ETA) by just 1KW!

:beerchug:

[Subaru ETA]

yes well done william and thanks for offering to split it with me! :)

yup i am very happy with my 183.5kw with 15.7psi.

i found it very interesting how many were hitting fuel cut around 14psi but mine sailed past that... well it didnt hold that much but yeah.

but as i say - im very happy since i havent spent much on it at all! 3 inch exhaust with decat, turbosmart MBC and k&n panel filter

[Subaru ETA]

o yeah - 2 of the top 3 results were Galants! :D :p

[bradc]

It isn't correction so much as it is flattening out the graph and making it look nice. But yeah, I'll be back without the cat to see how it goes.

[KiwiTT]

My stock standard 95-fueled only got 140kw.

Still that is enough for me.

[Kenneth]

It isn't correction so much as it is flattening out the graph and making it look nice. But yeah, I'll be back without the cat to see how it goes.

Are you sure about that? The graph with the spike in it is titled "Uncorrected Power and Torque.

The correction factor on the VR-4 on the final print out is set at 0.969, which when applied to the uncorrected power peak (estimated 198), gives the final peak of ~191

198*0.0969 = 191.9

I would put money on it.

[Kenneth]

My stock standard 95-fueled only got 140kw.

Still that is enough for me.

Didn't realise you were running 95.
Your power was spot on standard for ~8psi of boost, there is nothing to complain about there :)

[william]

Thanks for organizing a great day, it was good to catch up and meet a few new faces! Here is my Dyno sheet. Some will recall that my car made 148kw when dyno'ed the first time soon after I got it so I am very happy with the gains since then. It makes close to 180kw right from 4500 all the way to 6500rpm which is great for drivability of course!

http://www.clubvr4.com/forum/uploaded/1659/1226181495.jpg

[KiwiTT]

Yes I knew I was on 95. I was hoping some-one else who had a "Standard" car was running on 98 so I could do a compare.

[Ryan]

I had a great day as well guys - was good to see everyone again and meet some new faces as well (Onboost and Aidie) :)

I was somewhat disappointed with my results though as I was expecting a little bit more than that. It was my own fault though as I had probably wound the boost down too much as well (12.7psi).

I guess the next mod is a decent BOV so that it holds boost better. My torque curve just drops away after ~4250rpm.

It was a good learning exercise and it helps me point out what needs attention - I'll be back! :D

[GroundControl]

I wonder what the correction factor is based upon?

I notice on mine that it's 0.963 and William's is 0.974. The only difference I can see in the other figures is temp and relative humidity (17 deg, 43% for me, 16 deg, 45% for William).

So, if I take my 182.7kW, divide by 0.963, then multiply by 0.974, I get 184.8kW :D

[Subaru ETA]

i was expecting yours to do better than mine to be honest ryan. you have the same mods as me but you have down pipes - although i was running more boost...

could it just be power loss through the auto trans?

we also got more prof that cone filters are no good on these cars!

plus we proved that you dont have to spend crazy amounts of money on hard piping etc to make decent figures for these cars.

and as i said to Brad last night, i have a theroy as to way sams car has always done suprisingly well on the dyno - the extra ground clearence means there is more room between gaurd and rollers. thus there is greater amount of wind pressure as the wheel turns giving the roller a helping hand :p (for the guys who havent seen sams car, that thing has ground clearance a 4x4 hilux would be jealous of) :p :D

[GroundControl]

oh pish /pan :D

[bradc]

And at the engine:

Sam makes approx 242kw at 5700rpm and 475nm at 4500rpm
William makes approx 245kw at 5500rpm and just over 490nm at 4500rpm

[bradc]

Dave - Ryans car was 167kw, assuming we use an extra 7% loss that the UK dyno guys use, he'd have made about 180kw if it was a manual.

[Gly]

I got 98.9kw, so close to my goal of 100kw.


only 7.1kw more than the 25st did,
so not to bad a loss on having a auto

[GroundControl]

William was also pushing 14.5 psi boost, but I was getting fuel cut anything over about 13.4.

What would help there? A more free-flowing exhaust?

[bradc]

Your AFR was steady around 12:1 the whole way through, mine stayed around 13:1 for most of it, started to drop off at 5500rpm and was at 12:1 at 6500rpm. At that stage I remember your ST had a pod filter and hard pipes for the intake, what sort of exhaust did you have and did you have the cat still in?

[bradc]

Sam - might be the way that your boost was ramping up compared to his. The next mods I would suggest for you though would be an intercooler and exhaust.

[Ryan]

So Brad, how much engine power and torques am I making? (according to the Dyno graph anyway).

I don't really know how to convert it.

[bradc]

Post up your graph :)

[Ryan]

Post up your graph :)

It's in Sam's pics :)

http://www.sam.net.nz/gallery/v/cars/dynoday-8nov2008/DSC_2307.JPG.html?g2_imageViewsIndex=1

From what that picture tells me, there is no point in pushing the car past about 5700rpm or so as power just drops off from there

[Subaru ETA]

just comparing my graph to sam and williams -

sam had 13.4psi peak at around 4300RPM
william had 14.5psi at around 4400RPM

mine had 15.7psai peak at just over 300RPM

those 2 gradually built up to it whereas mine was there veery quick. however mine was at aprox 13psi by around 4300RPM and slowly dropped off to around 10psi by 6500RPM.

Just goes to show the difference between an EBC and a boost tap. I have run it at higher boost than that but i turned it down coz i didnt want it to hit cut on the rollers!

[GroundControl]

With the electronic controllers you can adjust the gain which should control how quick they come on boost, mine was set fairly low (3%) as I didn't want to overshoot and spike too much (plus was still getting to grips with configuring it all).

[bradc]

I make it around about 450nm at 4250rpm and 238kw at 5600rpm

[Ryan]

I make it around about 450nm at 4250rpm and 238kw at 5600rpm

Thanks Brad :)

[Oblivion]

Hey everyone, a bit slow gettin back on here after the weekend lol. Thanks for organising the great day! Good to see some of you again and put some new faces to the names :) A great learning experience too.
Sorry I dont have a scanner to put up my graph... for those of you wanting to know I made 167kw at 5700rpm and looks like about 800Nm torque at around 4500 rpm (both at the wheels of course :P).
EDIT I just realised I can just take a photo of it haha. There was some awesome results by the way, William and Ingletor to name a couple.

[Oblivion]

Hope you dont mind, I just stole this photo instead :iloveyou: uploaded/50105/1226223550.jpg
Interesting to note theres more torque at the front than the rear wheels for everyone (I think).

[Nick Mann]

800NM??????

Forgive me for being sceptical, but that sounds far too high, especially when combined with 167kW?

Good to see some good numbers again in NZ. I'd love to see a direct comparison between NZ and UK figures. You always seem to get better results for the same mods as us. One day when I have made my millions I'll bring the car over and see how it does there! :thumbsup:

[Subaru ETA]

yea i dont know how they get there torque figure... i got just over 1000NM with 183.5ATW KW and 15.7psi!

to me it sounded abit on the high side but ill take it!

[Oblivion]

Hmm yeah that what it says..... I'm sure there's more people that have more than me too :thinking:
I suggested before how about something like the 1/4 mile showplace but for dyno results? Would be easy to compare people's results there.

[Kieran]

Regarding the stupidly high torque figures.... Where these all recorded on Automatic VR-4s, perchance?

[GroundControl]

No, autos and manuals - I'm not sure exactly how that figure (presumably ATW) relates to engine torque.

[dickytim]

800NM??????

Forgive me for being sceptical, but that sounds far too high, especially when combined with 167kW?

Good to see some good numbers again in NZ. I'd love to see a direct comparison between NZ and UK figures. You always seem to get better results for the same mods as us. One day when I have made my millions I'll bring the car over and see how it does there! :thumbsup:

There is a calculation where you multiply/devide diff ratios, gear ratio's etc to get the engine torque figure.

[bradc]

It's due to gearing and stuff Nick. They do the runs in 3rd gear which affects things.

What you can do however is look on the graphs for the max torque figure, in Oblivions case it is at about 87kmh, and at that point the car makes about 147kw at the wheels. 87kmh is 4300rpm in a manual VR-4.

First of all we need to convert the power to at the engine. The standard figure we've been using in the club for a bit now is 24% loss, we get 195kw at the engine.

Then we apply the formula on this website http://www.indmeas.co.uk/about_torque_conversion_table.php

195*9550/4300 = 433nm

If we apply the same loss figure for power we get 221kw at 5500rpm.

Interestingly, the Japanese EVO X is rated at 221kw and 422nm, albeit at 6500rpm and 3500rpm. Oblivions car is very close though.

[Adie]

Just wanted to say thanks guys for organizing such a great day, it was good to finally meet you guys and put faces to the names, I have to say it was good learning curve and pointed out the areas that need attention on the legnum.

It was really surprising to see just how much a pod can effect these cars

[GroundControl]

Here's quite an interesting page regarding calculation of the correction factor on a dyno.

http://wahiduddin.net/calc/cf.htm

And also correction factor calculator (among various other calculators)

http://wahiduddin.net/calc/calc_cf.htm

[ianb]

I would be interested to see benh's comments on these power & torque figures.