1st Dyno sheet!!!

Raksj04 · 10-02-2012, 09:53 PM

The sheet also read the Temp at 95F. I wonder what power I would make with it a little bit cooler.

The Dyno had my car reading 1700 rpm at idle when it is closer to 700 to 900 rpm. I asked about the 85Ft/lbs as the guy running it handed me the sheet, he said it was because of the RPM being off.

RETed · 10-03-2012, 04:57 AM

I wouldn't worry about the absolute numbers...

What's good is:
1) the HP # is about right for the mods, and
2) that's a nice, almost ruler-flat torque curve.

It would've been nice to get an RPM scale underneath, but they didn't because of the RPM problem in the first place.

It looks like the secondary fuel injector transition could be tuned a little better.
How high did you rev the engine till?
It looks like a little wiggle up there, but it could be that you're banging off the rev limiter?
This top end RPM power isn't that important, because you spend very little time revving the engine up there.

-Ted

Raksj04 · 11-10-2012, 09:23 PM

I went to another Dyno day. this dyno guy was a lot better at running the dyno. peak HP was 213.62 and TQ was 192.93.

Quote:

Originally Posted by RETed

I wouldn't worry about the absolute numbers...

What's good is:
1) the HP # is about right for the mods, and
2) that's a nice, almost ruler-flat torque curve.

It would've been nice to get an RPM scale underneath, but they didn't because of the RPM problem in the first place.

It looks like the secondary fuel injector transition could be tuned a little better.

-Ted

This confrims what you were saying and the transition.

Libor · 10-03-2012, 02:41 PM

Quote:

Originally Posted by Raksj04

The sheet also read the Temp at 95F. I wonder what power I would make with it a little bit cooler.

If the dyno number would be SAE corrected, it would show about 196 HP. Temperature is higher, but so is pressure against standard, in this case their effects on air density almost cancel each other out.

Correction for temperature only, from 35°C to 25°C would bring us to 206 HP based only on density difference. But turbocharged engine is complex device, different temperature and pressure will have effect both on turbo and intercooler operation to such extend, that corrections can be way off.

IMHO uncorrected numbers with notes for ambient conditions are the right way for turbocharged engines tested on chassis dynos, it would save us many dramas that accompanies internet forums

10-02-2012, 09:53 PM	#1
Raksj04 I have Ultra power in me. Join Date: Sep 2011 Posts: 457 Rep Power: 15	The sheet also read the Temp at 95F. I wonder what power I would make with it a little bit cooler. The Dyno had my car reading 1700 rpm at idle when it is closer to 700 to 900 rpm. I asked about the 85Ft/lbs as the guy running it handed me the sheet, he said it was because of the RPM being off.