Dyno Day

SpeedRacer · Postby **SpeedRacer** » Sat Mar 08, 2008 9:14

Jack ^^
Thats just mean... I hate you

I sold my car today its officially gone...

Bertha · Postby **Bertha** » Sat Mar 08, 2008 9:14

Thanks again guys!

I think it was Matt that I told, but us Mazda folk are a little more refined group and have our shit together, THAT's why you all were able to blow through all the cars so quick.

No-Coast-Punk · Postby **No-Coast-Punk** » Sat Mar 08, 2008 9:14

Just to clarify. All numbers today WERE corrected for ALTITUDE.

The atmospheric correction for today was 1.27. That means that the air was 27% less dense than it would be on a 70 degree day at sea level.

NA cars lose EXACTLY 27% of their power between here and sea level in this situation.

Turbo cars not so much. There is a bit of grey voodoo science involved in turbo pressure ratio efficiencies and what not...

What we have found is that taking the atmospheric correction and cutting it in half (then rounding down if we need to) yields very good approximate corrected numbers for most turbo cars. We have had several people test on our dyno, and then an identical dyno at sea level... and the correction math holds up very well.

NA cars need to take your final numbers and multiply by .73 to get your true uncorrected "in the room" numbers that your car put down to the rollers.

Turbo cars need to take your final number and multiply by .87 to get uncorrected numbers.

To get your dyno jet CORRECTED numbers... calculate your raw un-corrected power. Then multiply by 1.41

The 1.41 thing is a very accurate number from what we have found. Usually within 2% of a dyno jet.

The altitude corrected numbers that come off our dyno are approximately what a Dyno Jet (MAC) reads un-corrected. Most other dyno's out there read much higher than they should.

Take the numbers off our dyno, plug them into a 1/4 mile calculator with the weight of a vehicle and it will be VERY close to the real world trap speeds. Dyno jet numbers... not so much.

It was really great meeting everyone today. Always nice to see some fresh faces and answer tech questions.

You guys did have your shit together. I've never seen a dyno day go that smoothly. We're typically only able to do 15-20 cars in a day MAX... and the last few cars are in the dark.

I'm sad that nobody took a swing at beating my Forza ring time

Bertha · Postby **Bertha** » Sat Mar 08, 2008 9:14

So my 193.2 * .87 = 168.1
168.1 * 1.41 = 237hp? at sealevel?

193.2hp here
237 hp sealevel?

Colombia28 · Postby **Colombia28** » Sat Mar 08, 2008 9:14

Ah SWEET! Thanks very much for posting that about uncorrect and corrected ect. And thanks very much to you and your guys for an awesome day! It was a blast!

LM · Postby LM » Sat Mar 08, 2008 9:14

Totally...thanks guys...great day, great staff at your shop. See you again soon...

arctic_blue83 · Postby **arctic_blue83** » Sat Mar 08, 2008 9:14

What exactly did everyone put down? Post corrected numbers!

memphis · Postby **memphis** » Sat Mar 08, 2008 9:14

<div class='quotetop'>QUOTE (RX-7 Chris @ Mar 8 2008, 01:08 PM) [url=index.php?act=findpost&pid=30852]<{POST_SNAPBACK}>[/url]</div>

I hope the dyno went great. I was about to leave when I got a call from Jimmy saying you were finished. That really sucks because I wanted to see all of you.

Now you all want to go home and relax. I need to get out so I guess I will go for a drive by my lonesome. [/b]

Trust me, I feel your pain.. I busted my ass off today at work to get done fast just to drive all the way down there to find out that I was 3hrs late from everyone already gone and went home.. I was expecting it to last a bit longer than that, but guess not eh... Ohwell..

arctic_blue83 · Postby **arctic_blue83** » Sat Mar 08, 2008 9:14

Everyone who dyno'd today, if you can, post your graphs over here:

For NA cars: http://coloradomazdaclub.com/forums/index.php?showtopic=6

For Turbo/supercharged cars cars: http://coloradomazdaclub.com/forums/index.php?showtopic=5

Colombia28 · Postby **Colombia28** » Sat Mar 08, 2008 9:14

Josh (Bertha) has all of our dyno graphs and he is going to digi scan them in for us. When we all get them we will post'em up there.

I made 204whp and 250wtq.... graph to come soon.

Bertha · Postby **Bertha** » Sat Mar 08, 2008 9:14

They've been posted...

http://coloradomazdaclub.com/forums/index....ic=1311&hl=

lazarus · Postby **lazarus** » Sat Mar 08, 2008 9:14

Sorry it was short guys! We had no idea it would go that fast. Next time we're going to say we can do 25-30 cars and start at 10am

Here is a video montage i put together, sorry if i missed one or two of you guys.

http://www.youtube.com/watch?v=9_9MCpBM0Oc

Matt M.

zoomin MP3 · Postby **zoomin MP3** » Sat Mar 08, 2008 9:14

<div class='quotetop'>QUOTE (Bertha @ Mar 8 2008, 05:49 PM) [url=index.php?act=findpost&pid=30892]<{POST_SNAPBACK}>[/url]</div>

So my 193.2 * .87 = 168.1
168.1 * 1.41 = 237hp? at sealevel?

193.2hp here
237 hp sealevel?[/b]

No, the 193.2 is what you would put down at sea level on a 70 degree day. The 168 is what you actually put down this morning. And the 237 is the LIE that a dyno jet would give you to boost your ego. lol

Like mine was corrected to get 106 at sea level. This morning I actually only put down 77.4 hp at 6100 ft. So if I were to put my 77.4 hp beast on a dyno jet, it would most likely read 109.

SpeedRacer · Postby **SpeedRacer** » Sat Mar 08, 2008 9:14

Damn I'm good... I knew exactly where the MS3's would land..

GR-8 · Postby **GR-8** » Sat Mar 08, 2008 9:14

<div class='quotetop'>QUOTE (SpeedRacer @ Mar 8 2008, 03:54 PM) [url=index.php?act=findpost&pid=30872]<{POST_SNAPBACK}>[/url]</div>

Crazy what happ to ur car[/b]

Was that for me or Trish? Cause Trish answered it. Me I got starnded @ chilli's. Still havn't picked it up. Probably in a little bit. Just won't go into gear.

Dyno Day

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