More Aussie Dyno Figures

[Caduceus]

I went and had my 135 dyno'd this morning in Brisbane. The car has JB3 installed and zero other engine performance modifications. Unfortunately, I did not get a pre-JB3 run as a baseline but I understand Mattyv had one done on his car in Toowoomba a few weeks ago and got 198rwkW on a totally stock setup.

Air temp 24 deg C at sea-level. I don't have a density altitude but it is very humid today. Petrol is Caltex Vortex 98 RON. I think the operator may have forgot to turn the aircon off - oops!

Peak power was 238.2 rwkW at 5500 rpm and peak torque was 458 Nm. The torque curve isn't really a curve at all - dead flat line at 458 Nm all the way from 2000 - 4000 rpm and then a gradual taper after that.

That's a significant gain from stock. Figure a 40kW gain on the dyno so the car is probably making close to 275kW at the flywheel.

There is a dip in the torque curve and a temporary flattening of the power curve between 4000 - 4300 rpm. The dyno guy says that is usually caused by VANOS transition. I can't say I notice it when driving - power delivery "feels" linear.

.

Greg.

[MikeVictor]

Originally Posted by Caduceus

I went and had my 135 dyno'd this morning in Brisbane. The car has JB3 installed and zero other engine performance modifications. Unfortunately, I did not get a pre-JB3 run as a baseline but I understand Mattyv had one done on his car in Toowoomba a few weeks ago and got 198rwkW on a totally stock setup.

Air temp 24 deg C at sea-level. I don't have a density altitude but it is very humid today. Petrol is Caltex Vortex 98 RON. I think the operator may have forgot to turn the aircon off - oops!

Anyway, I have yet to scan the printout but I was pleased with the results. Peak power was 238.2 rwkW at 5500 rpm and peak torque was 458 Nm. The torque curve isn't really a curve at all - dead flat line at 458 Nm all the way from 2000 - 4000 rpm and then a gradual taper after that.

That's a significant gain from stock. Figure a 40kW gain on the dyno so the car is probably making close to 275kW at the flywheel.

There is a dip in the torque curve and a temporary flattening of the power curve between 4000 - 4300 rpm. The dyno guy says that is usually caused by VANOS transition. I can't say I notice it when driving - power delivery "feels" linear.

I'll get the scan up when I can.

Greg.

Nice results, Greg. Yep, mine was 198KW ATW.

My result was gained on a day with 34C temp and low (around 24%) humidity, both of which aren't conducive to high readings.

[WAY]

Nicely done! Would have been better if you had a pre-dyno figure too but 40kw gain is nice however you look at it!

[Yep 135]

thats great info, thanks.
JB3 is certainly the tune of coice at the moment. Great vaue for money it seems.
Yep.

[Kris]

Nice, my figure was also 200rwkw stock and I got a 50rwkw gain using a JB3 so the results are the same

Are you using JB3 v1.1? Because you should notice some big torque spikes around 3k. Not overly great but thats how the 1.1 over the older beta version. It gives far more midrange punch instead of the top end hit I used to get..

[WAY]

He only got 40kw gain Kris but that could just be the difference in dyno...

[Kris]

Doubt it. The difference between stock and chipped should remain the same, I'd say its more likely due to temperatures or heat soak. 3 WOT runs in hot weather and the stock IC is toast, I know because we've tested it on the dyno! The poster noted it was a humid day!

[WAY]

True. Heat soak is a real issue in our cars. I wonder how much power will humidity rob us of? Not looking forward to summer track days!

[Kris]

I can tell you my power dropped from 254 to 243 after 2 runs on a dyno due to heat.

[Caduceus]

Dyno printout image added.

[Caduceus]

Originally Posted by Kris

Are you using JB3 v1.1? Because you should notice some big torque spikes around 3k. Not overly great but thats how the 1.1 over the older beta version. It gives far more midrange punch instead of the top end hit I used to get..

Kris,

I've updated the original post with the graph included. No torque spikes at all. Dead flat up to 4000 rpm.

This is JB3 v1.1 high boost map.

Greg.

[Zuzu]

Originally Posted by Caduceus

Kris,

I've updated the original post with the graph included. No torque spikes at all. Dead flat up to 4000 rpm.

This is JB3 v1.1 high boost map.

Greg.

You sure you have the V1.1 JB3.. Curve seems a bit odd for that High boost map..:iono:

Do you have the 3 map switch and if so, is it set on dead centre??

[Yep 135]

How much time did you give the JB3 for adaptation?

[Caduceus]

Originally Posted by Zuzu

You sure you have the V1.1 JB3.. Curve seems a bit odd for that High boost map..:iono:

Do you have the 3 map switch and if so, is it set on dead centre??

1. Yes. The JB3 came from Terry with V1.1 written with a black marker pen on the bottom of the control unit.

2. The switch is in the centre position - high boost map.

Can you qualify what looks "odd" about it? I sent a copy to Terry and he seems to think it "looks good".

Adaptation time - I'm on my second tank of petrol since installing it so probably about 3 or 4 hundred k's. It has seen a number of roll-ons to redline at WOT in 3rd gear (on a private road of course ;-)), as per instructions to let it adapt. Perhaps the best is yet to come? In any case, I'm happy with it.

Greg.

[Swift135]

The temp is the limiting factor with this JB3 graph, the boost will be cut down quick smart as the IAT rises, if you did the same dyno at 18 deg c. I would bet you would see another 20-25 KW. The torque curve is flat like stock curve because the temp has restricted the boost as the RPM rise, the classic JB3 torque curve climbs more as the RPM's increase, that curve looks like a SSTT curve (torque) as the SSTT just increases the boost by about 3 psi accross the board.
With the same conditions I doubt stock you would have pulled 200KW so I would say you have made more than 40kw, the air-con would not have mattered is it turns off if you go WOT.

[Zuzu]

Odd in the same sense as what Swift has described..

Kris's torque curve on the dyno last week on the first two runs had a more steeper torque rise at a lower rpm than yours, but that can be either the temp or just diff dyno/dyno operators.

Didnt mean to alarm to you mate..:wink:

[professor]

greg, thanks for posting. did you get boost and AFR figures as well? to me those are the most interesting control factors, without which hp/torque debates are misleading.

[Kris]

Originally Posted by Swift135

The temp is the limiting factor with this JB3 graph, the boost will be cut down quick smart as the IAT rises, if you did the same dyno at 18 deg c. I would bet you would see another 20-25 KW. The torque curve is flat like stock curve because the temp has restricted the boost as the RPM rise, the classic JB3 torque curve climbs more as the RPM's increase, that curve looks like a SSTT curve (torque) as the SSTT just increases the boost by about 3 psi accross the board.
With the same conditions I doubt stock you would have pulled 200KW so I would say you have made more than 40kw, the air-con would not have mattered is it turns off if you go WOT.

Cant wait to dyno my car in winter with a Intercooler