MRC Motorsports: Presents Rome wasnt built in a day...
Registered User
iTrader: (4)
Joined: Mar 2005
Posts: 2,880
Likes: 3
From: EveryWhere & yet... NoWhere
CONGRATS ROMEY... 
That is looking like some AWESOME power and the graph is smooth too..
Enjoy man, but be safe this winter... Cold tires and wet/icy roads are not good for us guys will summer tires and gobs of power.....
That is looking like some AWESOME power and the graph is smooth too..
Enjoy man, but be safe this winter... Cold tires and wet/icy roads are not good for us guys will summer tires and gobs of power.....
Nice powerbad. I'm interested in seeing how that will stack up with a built/sleeved APS TT.
About "smoothness" of graphs... anyone that's seen raw dyno data with no smoothing will tell you it's very rough and jagged. Some dyno brands seem to be prone to providing smoother readout than others as well.
About "smoothness" of graphs... anyone that's seen raw dyno data with no smoothing will tell you it's very rough and jagged. Some dyno brands seem to be prone to providing smoother readout than others as well.
Im sure the car is a blast to drive. I understand trying to play and safe and all, but I wouldnt think that something closer to 500whp, would be that much more abusive with your setup. Perhaps a couple different maps would be cool so atleast you can run more boost when you want.
Originally Posted by bacalhau16
Im sure the car is a blast to drive. I understand trying to play and safe and all, but I wouldnt think that something closer to 500whp, would be that much more abusive with your setup. Perhaps a couple different maps would be cool so atleast you can run more boost when you want.
The DD has no "smoothness" function to it, or a way to adjust it. It has really tight and fast sampling rate, which makes it all the more challenging to get a smooth graph. It picks up blips that other dynos will not.
The DJ has smoothing, and its usually listed in the upper left hand corner, as a value between 0 and 5. 0 is no smoothing, and 5 is max smoothing.
The dyno that has the capability to do HUGE smoothing is the Mustang Dyno. The filter value can be set to a mind-numbing level, so that only the most massive change in power will show a blip. With the filter level set very high, the graphs all look like they were drawn by a steady hand.
The DJ has smoothing, and its usually listed in the upper left hand corner, as a value between 0 and 5. 0 is no smoothing, and 5 is max smoothing.
The dyno that has the capability to do HUGE smoothing is the Mustang Dyno. The filter value can be set to a mind-numbing level, so that only the most massive change in power will show a blip. With the filter level set very high, the graphs all look like they were drawn by a steady hand.
Originally Posted by Sharif@Forged
The DJ has smoothing, and its usually listed in the upper left hand corner, as a value between 0 and 5. 0 is no smoothing, and 5 is max smoothing.
+1 id be nice to always see 0 smoothing or at least show if its used or not
Originally Posted by IIQuickSilverII
+1 id be nice to always see 0 smoothing
We have the lowest reading dyno, and the most unforgiving when it comes to graph smoothness.
Originally Posted by Sharif@Forged
The DD has no "smoothness" function to it, or a way to adjust it. It has really tight and fast sampling rate, which makes it all the more challenging to get a smooth graph. It picks up blips that other dynos will not..
question.. would adding alot of timing on the top end cause the high RPM section of the graph to look like the colorado rockies? i am curious if the car was pulling timing it would cause that? just curious
Originally Posted by doug
so if i get this right.. if shop A's dyno looks like the colorado rockies with DJ and shop B's dyno looks like a baby a$$ with DD.. it has nothing to do with software, but has to do with the tune ...
question.. would adding alot of timing on the top end cause the high RPM section of the graph to look like the colorado rockies? i am curious if the car was pulling timing it would cause that? just curious
question.. would adding alot of timing on the top end cause the high RPM section of the graph to look like the colorado rockies? i am curious if the car was pulling timing it would cause that? just curious
Originally Posted by MRC Motorsports
DD raw dog..
My dyno reads about 7% higher than FP in GA due to the altitude and atmosphere.
My dyno reads about 7% higher than FP in GA due to the altitude and atmosphere.
Elevation in Spotswood, NJ is about 40 ft above sea level.
Elevation in Marietta, GA is about 1100 ft above sea level.
I believe there is a 1 psi pressure drop for every 2000 ft of elevation. So air density is actually less in GA by 1/2 psi.
Humidity is higher in GA. And this should serve to increase power output (I think) since increased humidity acts like increased pressure. I would think this serves to negate the elevation but I don't know by how much.
Anyway just curious how much data substantiates this 7% figure and if Sharif concurs. I would have hoped that two DD dynos would have read much closer, even uncorrected.
* The power curves look really good - kudos for time spent getting that kind of result.
Originally Posted by rcdash
How do you know?
Elevation in Spotswood, NJ is about 40 ft above sea level.
Elevation in Marietta, GA is about 1100 ft above sea level.
I believe there is a 1 psi pressure drop for every 2000 ft of elevation. So air density is actually less in GA by 1/2 psi.
Humidity is higher in GA. And this should serve to increase power output (I think) since increased humidity acts like increased pressure. I would think this serves to negate the elevation but I don't know by how much.
Anyway just curious how much data substantiates this 7% figure and if Sharif concurs. I would have hoped that two DD dynos would have read much closer, even uncorrected.
* The power curves look really good - kudos for time spent getting that kind of result.
Elevation in Spotswood, NJ is about 40 ft above sea level.
Elevation in Marietta, GA is about 1100 ft above sea level.
I believe there is a 1 psi pressure drop for every 2000 ft of elevation. So air density is actually less in GA by 1/2 psi.
Humidity is higher in GA. And this should serve to increase power output (I think) since increased humidity acts like increased pressure. I would think this serves to negate the elevation but I don't know by how much.
Anyway just curious how much data substantiates this 7% figure and if Sharif concurs. I would have hoped that two DD dynos would have read much closer, even uncorrected.
* The power curves look really good - kudos for time spent getting that kind of result.
Originally Posted by rcdash
Looks like 23.5 millibars from CWOP data over the last 26 weeks.
I take that back - it was the mean error from one of their recording stations - kind of useless - oops - hang on.
All I can get is current 30.1 in in Atlanta and 30.2 in today in Newark. Not much difference there.
EDIT: Anyway I thought I remember you saying someone had dyno'd at the two places (obviously at diff times) and it read lower, but I can't find that thread. Bottom line is that based on a single data point? (Fine if it is, not contradicting since I have 0 data points )
All I can get is current 30.1 in in Atlanta and 30.2 in today in Newark. Not much difference there.
EDIT: Anyway I thought I remember you saying someone had dyno'd at the two places (obviously at diff times) and it read lower, but I can't find that thread. Bottom line is that based on a single data point? (Fine if it is, not contradicting since I have 0 data points
)
Last edited by rcdash; Dec 12, 2007 at 02:35 PM.
