I had my 2005 MCS dyno'd this Tuesday on a 248 Dynamometer.

Conditions:

Ambient temp 95 deg F
Car cooled down for 30 min with damp rags and ice bag on IC
Octane 95 (mixture of 100 and 91)
2005 MCS with 15% pulley, CAI, 62 mm TB, MTH, one-ball exhaust

Results

194 WHP at 7100 rpm
176 ft-lbs torque at 3700 rpm
A/F ratio between 4000 and 6000 rpm = 11-13

 

Nice run, need pics of your car

 

Those are great numbers. We need some experts to chime in, but I'd like to see those a/f numbers - 13 is a bit too close to leaning out, especially at higher RPM's.

 

Is the dyno the only way to get a/f numbers?

 

I've become one of those that puts little faith in any dyno results as I've seen my car as high as 201 whp on one dyno and as low as 167 on another. I would really doubt that you are getting 194 hp with all the info you just gave us. Maybe 194 at the crank, but I find that doubtful also. Your mods are minimal, your fuel is poor and the temp is way high.

Are 2005s that strong? What am I missing here?

 

"Your mods are minimal, your fuel is poor and the temp is way high"

Sounds like the story of my life ...

 

The fuel was 95+ Octane

 

No, the fuel was 91 + 100. Not sure if you put exactly equal parts of each into an empty tank and then drove around for a while.
Does 100 + 91 in equal parts actually equal 95?
No matter, even if you put in all 100 octane, it would make very little difference in HP gains on a dyno, if in fact any at all.
Your numbers are just to high. I'm not trying to burst your bubble here at all.

 

So it sounds like to settle this it would help to see the actual Dyno run graphs.

 

No, I have no doubt that you are 100% honest here about what the dyno results were. It's not you I have an issue with, it's all Dynos in general.
As I have said, I have experience in this as I have dynoed on more then one. When I was handed my printout of 234 hp at the crank, I knew it was just not right. It's fun to show off of course, but anyone who really knows the Mini S, knows that with the mods I have, it's just not right.
Did I feel better when I was handed one a few weeks ago that said I was getting 167 at the wheels? No. It was certainly more fun to think that maybe I was getting around 210 from the other dyno.

 

Baseline, baseline, baseline.

 

I don't have a baseline before mods but my last run (one month ago) yielded 174 WHP and 164 ft-lbs of torque. The following was different during the most recent run:

1. Approx 95 octane gas (empty tank put in 6 gal of 91 and 4 gal 100)
2. I cooled down the IC with an ice bag - Could have dropped the IC temp 63 deg F (Ambient 95 deg F - 32) I don't know Intake air temp
3. Revised MTH remap with more optimum A/F ratios

Doesn't it seem possible that I could have 5 WHP from ECU remap, 5 from gas and 10 from much colder air charge?? My friend saw a large WHP increase on his JCW by just cooling the IC with ice.

 

I think the main thing we all get from our dyno runs is to confirm, when comparing with our baseline runs, that we have spent our money wisely on our mods. The main concensus on dyno runs seems to be they are not very accurite due to many variable factors, ie wheel slippage, temps, humidity, fuel quality, the idiot conducting the run etc. etc. etc.

04 MCS, sport pkg, leather, 15% pulley, Alta CAI, Milltec exhaust, densos and, yes, dynoed at 179 WHP/159 baseline.

 

Share some info on the a/f numbers between 4-6000 rpm mentioned in your post. 13 is too lean, especially if it's happening at the upper range. You can produce more hp with a leaner condition, but it's not a good way to go.

 

The A/F ratios from my latest run: 194 WHP 176 ft-lb Torque

RPM A/F Ratio

4000 13.4
4500 12.3
5000 11.8
5500 11.4
6000 11.0
6500 10.3
7000 11.8
7200 Rev limit per MTH ECU REMAP

If anyone would like a copy of the dyno chart please send me a PM with your FAX number.

Thanks