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Re: Congratulations MattW [Re: ] #649275
21/07/2008 09:13
21/07/2008 09:13
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Nottingham
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 Originally Posted By: MattW
 Originally Posted By: mattB
I'm sure they'd talk you through what the setting means and what difference it could possibly make if you ask them. Maybe there isn't a 5, just 4, 6 and 8?


After doing some searching for "dyno dynamics" it appears they dont have a 5 cylinder mode, been mentioned on here before.

does 314 at the flywheel sound about right when it's 266 at the wheels? sounds about right to me.


Hi Matt,

That's a fair comment and may be correct.

Jules

Re: Congratulations MattW [Re: Cyclone] #649340
21/07/2008 11:01
21/07/2008 11:01
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It should be run in 6 cylinder mode. Apparently neither is any more accurate, but it is the industry standard to do 5s in 6 mode for comparative purposeses.

More importantly, as I recall (I can't view from work) your dyno graph redlines at 5,900rpm. It appears that they haven't set the dyno up correctly (if this is the case) and you BHP figures will be out. You'd be better of posting up the torque curve and getting one of us to put the BHP up properly.

I think it will actually give a higher figure...


Sorry, I blame the work filter

Last edited by Trappy; 21/07/2008 12:47. Reason: Idiocy...

F****** b****** thing...
Re: Congratulations MattW [Re: Trappy] #649354
21/07/2008 11:11
21/07/2008 11:11

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MattW
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 Originally Posted By: Trappy
It should be run in 6 cylinder mode. Apparently neither is any more accurate, but it is the industry standard to do 5s in 6 mode for comparative purposeses.

More importantly, as I recall (I can't view from work) your dyno graph redlines at 5,900rpm. It appears that they haven't set the dyno up correctly (if this is the case) and you BHP figures will be out. You'd be better of posting up the torque curve and getting one of us to put the BHP up properly.

I think it will actually give a higher figure...


You looking at my graph there?

My graphs go to well over 6500rpm, if you take another look, and the torque curve is displayed \:\?

Re: Congratulations MattW [Re: Trappy] #649355
21/07/2008 11:11
21/07/2008 11:11

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test was done in 3rd gear???
Should be 4th in 5gear boxes and 5th in 6gear boxes, no?

Good results, spot on fueling, so who really cares if its 310 or 320!

V.

Re: Congratulations MattW [Re: ] #649363
21/07/2008 11:16
21/07/2008 11:16

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MattW
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MattW
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3rd gear was used, yes - most of the different coupe RR sessions that I've seen have been done in 3rd gear.

Re: Congratulations MattW [Re: ] #649366
21/07/2008 11:19
21/07/2008 11:19

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v.odd!

as far as I know they try to test with as close to 1:1 ratio and that's definitely not 3rd gear! I'm sure someone is going to correct me if not, but most Italian and Greek RR graphs I've seen and all the RR sessions I've been to were in 4th or 5th for the 6gear guys.

V.

Re: Congratulations MattW [Re: ] #649396
21/07/2008 11:51
21/07/2008 11:51
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It depends on what the max speed is that the rolling road can accurately calibrate too. For the Dyno Dynamics Dynomometers it is 150mph. Therefore the Coupe could be ran in 4th.

I tried running my old Cerbera in 4th on the Dyno Dynamics but from around 6000rpm the curve started to distort and gave a much higher figure than when we ran in 3rd, the car was running at over 150mph. On another brand of Dyno this my not be a problem.

Re: Congratulations MattW [Re: ] #650036
22/07/2008 11:45
22/07/2008 11:45

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Done better that mine there mate your fueling is alot better than mine looking at your graphs.

Congratulations m8!! Will have to look at sorting out my fuel and clutch still on a standard one at the moment

Re: Congratulations MattW [Re: ] #650091
22/07/2008 13:01
22/07/2008 13:01

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Cheers, clay, I've replied in your thread ;\)

Re: Congratulations MattW [Re: ] #650512
23/07/2008 00:50
23/07/2008 00:50

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MattW
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OK, what's going on?

More than one person has told me that my results are just plain wrong, inaccurate, try it on another rolling road, etc etc.

Nobody will tell me WHY they are wrong... \:\?

(apart from jules saying they shouldnt have run it in 4F - but 4F was fine on everybody elses car)

What else could bring anyone to that conclusion?

Re: Congratulations MattW [Re: ] #650573
23/07/2008 09:16
23/07/2008 09:16

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 Originally Posted By: MattW
OK, what's going on?

More than one person has told me that my results are just plain wrong, inaccurate, try it on another rolling road, etc etc.

Nobody will tell me WHY they are wrong... \:\?

(apart from jules saying they shouldnt have run it in 4F - but 4F was fine on everybody elses car)

What else could bring anyone to that conclusion?


Matt - give Steve a call at Dyno Demon. Explain what people on here are saying and ask him for his comments. I'm sure this can be brought to a successful conclusion. \:\)

Re: Congratulations MattW [Re: ] #650591
23/07/2008 10:14
23/07/2008 10:14

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I need a bit more than "I've been told theyre wrong"

I need "I've been told theyre wrong BECAUSE......." ;\)

Re: Congratulations MattW [Re: ] #650603
23/07/2008 10:27
23/07/2008 10:27
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The things that I can see are wrong are that it’s been run in 3rd gear when 4th would be more ‘normal’ and that the torque seems remarkably high for the level of boost you are running.


Death-rattle-tastic
Re: Congratulations MattW [Re: mattB] #650610
23/07/2008 10:37
23/07/2008 10:37

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Thanks mattb \:\)

I can explain the torque.

look at any other coupe running a GT28R.

Can they hold 1.4 bar to 5000rpm?

No, it drops off to 1.2 bar at 5000rpm. limitations of the turbo.

My maximum torque is 300lb/ft at 5000rpm at 1.2 bar. SAME AS ALL THE OTHERS \:\)

If I was running 1.4 bar I would get the same or similar peak torque at 5000rpm becauser it would have dropped to 1.2 by then, but it would beef up the midrange more below 5000rpm.


Next time, I will ask them to run it in 4th gear.

Re: Congratulations MattW [Re: ] #650680
23/07/2008 12:00
23/07/2008 12:00

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suba
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 Originally Posted By: MattW

No, it drops off to 1.2 bar at 5000rpm. limitations of the turbo.



What? You can almost hold that at the redline!??!?!?!?

Re: Congratulations MattW [Re: ] #650690
23/07/2008 12:13
23/07/2008 12:13
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The other disadvantage about running in 3rd gear is your boost will come in later by a few 100rpms. You will also get slightly higher wheel power although this will have no bearing on the flywheel calculation as long as the dyno was setup for 3rd gear and ran in 3rd gear.

Anyway, nice results \:\)


[Linked Image]

Re: Congratulations MattW [Re: ] #650703
23/07/2008 12:27
23/07/2008 12:27

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MattW
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 Originally Posted By: suba
 Originally Posted By: MattW

No, it drops off to 1.2 bar at 5000rpm. limitations of the turbo.



What? You can almost hold that at the redline!??!?!?!?


Nope, not even close!

When I went in Ross' car just after he had upgraded from the GT28R to the RSR he was saying it was definitely holding more boost than the R, it was holding 1.2 bar past 6k rpm ;\)

Last edited by MattW; 23/07/2008 12:39.
Re: Congratulations MattW [Re: ] #650712
23/07/2008 12:41
23/07/2008 12:41
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Oh and upload your graph ;\)


[Linked Image]

Re: Congratulations MattW [Re: ] #650714
23/07/2008 12:42
23/07/2008 12:42

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;\)

 Originally Posted By: MattW
1. High setting - Flywheel Power and Torque
GRAPH

2. Low setting - Flywheel Power and Torque
GRAPH

3. Both settings - Boost and Fuelling (top right shows power at the wheels on low setting - high was 266)
GRAPH

Re: Congratulations MattW [Re: ] #650716
23/07/2008 12:43
23/07/2008 12:43
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No, to your TS page \:\)


[Linked Image]

Re: Congratulations MattW [Re: Flea] #650718
23/07/2008 12:44
23/07/2008 12:44
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Oh and list your mods while you are at it \:D


[Linked Image]

Re: Congratulations MattW [Re: Flea] #650719
23/07/2008 12:45
23/07/2008 12:45
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mattB Offline
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Why cant you get more than 1.2 bar at 5k rpm? I can hold more than that on my GTi-R.


Death-rattle-tastic
Re: Congratulations MattW [Re: Flea] #650720
23/07/2008 12:45
23/07/2008 12:45

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oh right!

OK \:\)

Re: Congratulations MattW [Re: mattB] #650722
23/07/2008 12:47
23/07/2008 12:47

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 Originally Posted By: mattB
Why cant you get more than 1.2 bar at 5k rpm? I can hold more than that on my GTi-R.


I think I could hold a little bit more, perhaps, if it was set up properly to hold it.

GT28R isnt bigger than GTiR is it?

Re: Congratulations MattW [Re: ] #650730
23/07/2008 12:56
23/07/2008 12:56

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suba
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yep

Re: Congratulations MattW [Re: ] #650732
23/07/2008 13:02
23/07/2008 13:02
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mattB Offline
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Here's my boost graph from last weekend, so I'd say you should be able to run a fair bit more boost, or at least hold it for longer (if you have sufficient fueling);

http://i50.photobucket.com/albums/f312/bryce_matthew/HiboostBoost.jpg


Death-rattle-tastic
Re: Congratulations MattW [Re: mattB] #650736
23/07/2008 13:10
23/07/2008 13:10
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So your boost goes over 1.5bar then tails off to 1.3??
Am i right in thinking 1 bar is 14psi???
Lot of boost isn't it??

Nick

Last edited by mattB; 23/07/2008 13:13. Reason: Sig pic too big
Re: Congratulations MattW [Re: nick_d] #650738
23/07/2008 13:14
23/07/2008 13:14
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mattB Offline
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It is a lot, but the point I'm trying to make is that MattW's turbo is capable of making more boost than he is currently running.


Death-rattle-tastic
Re: Congratulations MattW [Re: mattB] #650741
23/07/2008 13:19
23/07/2008 13:19

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MattW
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 Originally Posted By: mattB
It is a lot, but the point I'm trying to make is that MattW's turbo is capable of making more boost than he is currently running.


I think youre right actually, if I ran more in the midrange then it would be able to sustain it for longer. it only drops by a few PSI, just like yours and everyone elses.

It made 322bhp at 1.3 bar so that's what must have happened there.

The most important thing for me... what I want to know is:

300lb/ft at just over 1.2 bar at 5000rpm - is that "too much torque to be correct" ??

Last edited by MattW; 23/07/2008 13:21. Reason: added a bit
Re: Congratulations MattW [Re: ] #650822
23/07/2008 14:39
23/07/2008 14:39

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suba
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It's more than I would have thought - mine make just under that but peaks at 5,500 but on a flowed engine.

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