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Dyno Leaderboard Version III


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 lachlan said:

whats funny about that ?

just appears the engine has very good volumetric efficiency to me

boost is piled up un used air after all / in effect a measure of how restrictive an engine is

haha what I ment was it made good results on 22psi but bumpd it up to 26-27 just to make a meeesly 20kw
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 jazza said:

Talked to gcp and asked what the power curve was like after 6k amd he daid it kept climbing to over 300kw but didnt wanna compromise reliability from the injectors getting close to maxed out so only displayed the power to 6-6.5k. On 21psi too.

Weird how he tuned mine to the ragged edge then. On my setup the way it is it would benefit from injectors but mainly bring it back to being safe again.

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  • 3 months later...

lol wut?

The recommendation was put forward by Phil (club member) from Dynotech Industries himself and i would take his word over yours so um yea it is what it is.

Its not like i woke up one day and decided that ohh ill shall run 24 because i feel like it ::)

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 funkytown said:

Lol i know exactly what im talking about. Post your your iats and ignition advance logs and well see who knows what theyre talking about.

Muppets.

It doesn\'t have a Link so won\'t have IAT anyway :)

And as for internet willy-waving numbers - I call shenanigans. The ratio is wrong and it\'s using SAE correction rather than DIN. Also sad panda because it says more torque at the same time as mine which has a G4 and VF34.

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Just to clear a few issues up

- Car does have IAT sensor, which is built into MAF the sensor

- Customer choose to run 23 psi boost

- That run was done in 4th gear, so ratio is correct at 5.501

- SAE is the preferred correction method by Dynapack where air temps are under 40C (during the run temp started at 22C and raised to 24C at end)

- Car was tuned and run up in 5th gear at 4.111 ratio (customer has printout etc for thoose runs)

- Just because a car made "X" amount of power with "X" amount of mods (or ecu) doesnt mean it will make more torque or power than car "Y"

- A Dyno is a tuning tool and the number that people should be looking at is the overall gain (ie before and after)

- Most dynos will read different (apart from Dynapack which has less variables) due to varying conditions, temp, strap down method, tyre pressure and type etc

Regards

Dynotech Industries

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 kris_pran said:

lol wut?

The recommendation was put forward by Phil (club member) from Dynotech Industries himself and i would take his word over yours so um yea it is what it is.

Its not like i woke up one day and decided that ohh ill shall run 24 because i feel like it ::)

So you\'re now called into disrepute. Tuner says YOU choose 23psi.

I knew that wouldnt take long.

Agree boon.. few things seem a touch off. Pity if they wound out some boost would probably got a lot better too. I really want to see the iats for the luls. The fact its pappering to 16 would indicate its come on to strong too.

OP can you put up fhe boost curve please.

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 philr8 said:

Just to clear a few issues up

- Car does have IAT sensor, which is built into MAF the sensor

- Customer choose to run 23 psi boost

- That run was done in 4th gear, so ratio is correct at 5.501

- SAE is the preferred correction method by Dynapack where air temps are under 40C (during the run temp started at 22C and raised to 24C at end)

- Car was tuned and run up in 5th gear at 4.111 ratio (customer has printout etc for thoose runs)

- Just because a car made "X" amount of power with "X" amount of mods (or ecu) doesnt mean it will make more torque or power than car "Y"

- A Dyno is a tuning tool and the number that people should be looking at is the overall gain (ie before and after)

- Most dynos will read different (apart from Dynapack which has less variables) due to varying conditions, temp, strap down method, tyre pressure and type etc

Regards

Dynotech Industries

Thanks for weighing in on this - would be nice if a few more tuners would post on here from time to time.

My understanding/limited knowledge, as follows:

-IAT in the MAF doesn\'t tell us much about the turbo falling over beyond ~21psi (which they do) because it\'s pre-turbo. I dare say it would have pulled almost the same number at 21psi, I\'ve seen a couple of V7 STI\'s with VF34\'s that didn\'t gain a damn thing going beyond 21psi apart from more det and higher intake temperatures.

-I\'m about 90% sure that the 4th gear overall ratio for a MY01 6MT is 5.2494 - mine was dyno\'d with a ratio of 5.25 which would explain why the curve seems to have been nudged to the left in this instance

-The 2 plots on the graph he posted were obviously done in different gears, making the delta somewhat skewed.

-And you\'re entirely correct, a dyno realistically is only useful for examining gains/effects from changes on the same car run on the same dyno... which is why I said it\'s all about internet gentleman-sausage-waving anyway. Respect for not fudging the TCF like some places do to dial-a-score - and if it was run with a 5.25 ratio it would have pulled a higher number, which would consequently have made my internets-willy fall off.

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 funkytown']

[quote name='kris_pran said:

lol wut?

The recommendation was put forward by Phil (club member) from Dynotech Industries himself and i would take his word over yours so um yea it is what it is.

Its not like i woke up one day and decided that ohh ill shall run 24 because i feel like it ::)

/quote]

So you\'re now called into disrepute. Tuner says YOU choose 23psi.

I knew that wouldnt take long.

Agree boon.. few things seem a touch off. Pity if they wound out some boost would probably got a lot better too. I really want to see the iats for the luls. The fact its pappering to 16 would indicate its come on to strong too.

OP can you put up fhe boost curve please.

jz790m.png

Please see above the email from Phil himself. I chose 23 after the recommendation put forward

Boost will fall on top rpm, My V8 STI did the same 22psi peak tapering to 16.

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Doesnt boost vary a tad with compression etc anyway so real world arse feeling is where its metered? Dynos are all over the show regardless of what people claim so if someone reads higher than average it turns into a witch hunt. Even factory cars have diff comp when they are theoretically identical. This is all a bit he said she said lets just say cool and move on?

On another note what causes the taper on the boost curve? Ive never had it running 10-20psi on TD04/VF22/23 mbc or ebc and everyone else complains of it.

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 kris_pran']

[quote name='kris_pran said:

lol wut?

The recommendation was put forward by Phil (club member) from Dynotech Industries himself and i would take his word over yours so um yea it is what it is.

Its not like i woke up one day and decided that ohh ill shall run 24 because i feel like it ::)

/quote]

So you\'re now called into disrepute. Tuner says YOU choose 23psi.

I knew that wouldnt take long.

Agree boon.. few things seem a touch off. Pity if they wound out some boost would probably got a lot better too. I really want to see the iats for the luls. The fact its pappering to 16 would indicate its come on to strong too.

OP can you put up fhe boost curve please.

Please see above the email from Phil himself. I chose 23 after the recommendation put forward

Boost will fall on top rpm, My V8 STI did the same 22psi peak tapering to 16.

So Funkytown are you avoiding this thread like the plague?

Could you also expand on what you ment when you said it wouldn\'t take long? Implying that what i said earlier was a lie perhaps. ::)

You need to watch your tone when you\'re addressing someone else on the forum. Sound like the typical keyboard warrior who wouldn\'t have the balls to display that sort of behaviour face to face.

VF30 past 21psi out of efficiency range = myth

As for ratios refer to first post - http://forums.nasioc.com/forums/showthread.php?s=&threadid=513584&highlight=dyno+gear

evowrx - A generic map was flashed onto the car and it made 200ishkw on 21psi. Made said power on the dyno sheet printout on 23psi tapering to 16psi. Did about 5 runs on 23psi and power output was same throughout. Holds 23 till 6k from what i can recall.

It definitely pulls harder then my v8 sti which was also making 221kw 22psi tapering to 16psi. Im not to sure about why the boost drops all of a sudden on the stock turbos but this has happened with me multiple times. My old evo 8 was tuned to 24psi but tapered to 18 as well, maybe the stock units just cant sustain that sort of boost on the higher rpms.

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 kris_pran said:

It definitely pulls harder then my v8 sti which was also making 221kw 22psi tapering to 16psi. Im not to sure about why the boost drops all of a sudden on the stock turbos but this has happened with me multiple times. My old evo 8 was tuned to 24psi but tapered to 18 as well, maybe the stock units just cant sustain that sort of boost on the higher rpms.

Boost is most likely dropping because it\'s reached the choked flow point of the compressor map. Which also doesn\'t mean that using a higher pressure ratio through the middle of the map is out of the efficiency range of the turbo either? Would be interesting to see if anyone actually has a compressor map for a VF30. Otherwise both sides of the argument have the same amount of facts thrown in ;)

Peaking to 23psi then dropping off in the higher rpm range would give it a fatter torque spread and make good use of a smaller turbo IMO.

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