Interesting Power Figures - Day On The Dyno

[privatealpha]

So this morning I had the skyline on the dyno.

Usual mods:

Hks2535 turbo

740cc injectors and walbro pump

Powerfc

All the expected bolt on mods for an average reasonably quick Skyline.

Running at about 17-18psi

Has been street tuned so I really wanted to know the power figure.

Disappointing to say the least, only 164kw atw

I have taken the car down the drag strip here in Townsville and have run times of 13.5 @ 111mph and my best of 13.3 @ 109 mph

Which I thought, while an average time, not a bad mph.

Thoughts?

Edited November 10, 2012 by privatealpha

[DVS JEZ]

Looks like it noses over a little

[privatealpha]

Not sure what that means?

Was really hoping to crack 200kw but fell short of that by a long way.

Car is pretty damn quick for only 164kw though....

[DVS JEZ]

Not sure what that means?

Was really hoping to crack 200kw but fell short of that by a long way.

Car is pretty damn quick for only 164kw though....

Well either the clutch is slipping, wheels spinning or the power dies off massively due to the tune

[DVS JEZ]

Not sure what that means?

Was really hoping to crack 200kw but fell short of that by a long way.

Car is pretty damn quick for only 164kw though....

Well either the clutch is slipping, wheels spinning or the power dies off massively due to the tune.

Edit: maybethe dyno operator has let the throttle off and let the power drop before ending the run.

[The Dan]

Where are the corrections and other run data?

[privatealpha]

12psi run - 130kw atw

www.youtube.com/watch?v=UITPXBKRLrE&feature=plcp

1st 18psi run

www.youtube.com/watch?v=HWTNCefhkS0&feature=plcp

2nd 18psi run

Makes a whole lot of noise for not much haha.

The 3 dyno papers is all I got.

Edited November 10, 2012 by privatealpha

[The Dan]

Your mph says you've got 300hp (~220kw)

[methz]

111mph isnt 164kw at wheels haha. id say low reading dyno or something along those lines.

[privatealpha]

I like to think of it as a really strong 164kw atw

Interesting enough, on another dyno

12psi is 180kw and on 14psi made 199kw atw.

You can see why I was really hoping to crack 200kw especially with a bit more boost.

Ahh the dissappointment.

Edit:

Actually just checked, 10psi made 180kw and 12psi it made 199kw.

6psi more boost and made less than what I started out at.

Edited November 10, 2012 by privatealpha

[skylinecouple]

The evidence is there. Sometimes the answer is so simple you get confused thinking about it. I'll bet if you go back to the same dyno that showed a low figure and had someone that knows how to set it up correctly actually using it the results would be a whole lot better.

[jet_r31]

lol, low reading dyno, its 210-220rwkw ish in a R31 for that mph

[privatealpha]

This may seem silly. But my car has a vtec controller, which I suspect is for the VCT. Car is using an rb20 ecu.

Its just set to max, didnt have enough time on the dyno to play around with it to see where it should have been set.

Anyone ever connected a vtec controller to their 25's?

[paulr33]

what gear was it done in and what diff gear ratio?

my 33 with 192rwkw ran 13.5 @ 105mph for comparison

[hypergear]

I've made an identical turbocharger for the development of our SS1PU turbocharger last year. I've made 248rwkws it didn't produce much of a nice curve with noise dive after 6000RPMs. I believe the comp wheel is too small for a Rb25det, how ever would be a ok turbo for a Rb20det.

[privatealpha]

4th gear and 3.89 (automatic diff)

My car with (263hp) 196kw ran 13.4 @ 104mph, very similar times and similar power.

Here it is racing a VE ute which smoked me...I need more cylinders.