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Senior Member
Joined: Sep 2010
Posts: 457
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From: California
e63s edition 1
Great job Keith.
Questions though.
1. Why did you run in 4'th gear? (is it because you change your final ratio?)
2. On your maps are you compensating for the loss of air during tuning on the dyno?
Those carpet dryers are a joke. I think the biggest I have seen is around 3,5k cfm (80kph) and they cover about 1/4 of the front.
You would need a 60K+ cfm to simulate you top runs down the track.
I am sure it would play an even bigger role for you having a RAM air setup.
Fantastic results none the less. Keep on pioneering..
We are all along for the ride
Questions though.
1. Why did you run in 4'th gear? (is it because you change your final ratio?)
2. On your maps are you compensating for the loss of air during tuning on the dyno?
Those carpet dryers are a joke. I think the biggest I have seen is around 3,5k cfm (80kph) and they cover about 1/4 of the front.
You would need a 60K+ cfm to simulate you top runs down the track.
I am sure it would play an even bigger role for you having a RAM air setup.
Fantastic results none the less. Keep on pioneering..
We are all along for the ride
Last edited by sighting; Feb 11, 2012 at 07:37 PM.
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MBWorld Fanatic!
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From: Central Florida
2014 Audi RS7
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Joined: Sep 2008
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From: Central Florida
2014 Audi RS7
Hey Guys,
Here are the full graphs corrected. I had to leave early and they got printed before I could look them over. Ignore the line and numbers in the middle of the graphs. The A/F looks very good on both. On the nitrous graph there is a dip in the graph and that could be from numerous things like a nitrous pressure drop, knock sensors, etc... and I don't have an answer. I would tend to think its a nitrous pressure drop since it went rich at that point in time and then came back up. Keep in mind that pull took less than 3 seconds.
The humidity was over 50% but the graphs show 8%. It always does for some reason but it was nearly 80 degrees in the shop.
Nitrous run.
We had an absolute blast and I can't wait to get to a local track.
The torque is over 400 N/A as low as 3000 rpms so we lost NO torque.
Here are the full graphs corrected. I had to leave early and they got printed before I could look them over. Ignore the line and numbers in the middle of the graphs. The A/F looks very good on both. On the nitrous graph there is a dip in the graph and that could be from numerous things like a nitrous pressure drop, knock sensors, etc... and I don't have an answer. I would tend to think its a nitrous pressure drop since it went rich at that point in time and then came back up. Keep in mind that pull took less than 3 seconds.
The humidity was over 50% but the graphs show 8%. It always does for some reason but it was nearly 80 degrees in the shop.
Nitrous run.
We had an absolute blast and I can't wait to get to a local track.
The torque is over 400 N/A as low as 3000 rpms so we lost NO torque.
Super Member
Joined: Oct 2008
Posts: 837
Likes: 25
From: seattle
1990 300ce supercharged and intercooled
That is bad ***. I have not run a lot of nitrous so just a question. Is it normal for it to flat line like that on the top end? Or is this a flow issue, limiter? With that much spray and hp you might need bigger primaries on your headers. Maybe 2-2 1/4. From what I can gather that is what nos cars do. Start compromising your n/a torque though.
Thread Starter
MBWorld Fanatic!
Joined: Sep 2008
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From: Central Florida
2014 Audi RS7
That is bad ***. I have not run a lot of nitrous so just a question. Is it normal for it to flat line like that on the top end? Or is this a flow issue, limiter? With that much spray and hp you might need bigger primaries on your headers. Maybe 2-2 1/4. From what I can gather that is what nos cars do. Start compromising your n/a torque though.
One other comment that IS significant is that all the runs we previously made were done with a 20% load applied and the dyno had power challenges and we couldn't run any load Saturday. That being said the numbers are low compared to what they should have been with a load. In my experience as much as 15-20hp with a 20% load applied. Even without the load, I can't stop smiling.
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Joined: Sep 2008
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From: Central Florida
2014 Audi RS7
Hey Mav,
I hate to disappoint you guys but there isn't much difference in the idle and driveabillity. With dual overhead cams you don't get that lopey idle. Its a little different but not much. The driveability is excellent. My car is stupid loud already with the race exhaust so a drive by won't show you much. You'll have to take my word that its really fast.
Not quite like a blower car but if you are used to N/A its a nice increase.
The car won't see nitrous except at the drag strip.
I hate to disappoint you guys but there isn't much difference in the idle and driveabillity. With dual overhead cams you don't get that lopey idle. Its a little different but not much. The driveability is excellent. My car is stupid loud already with the race exhaust so a drive by won't show you much. You'll have to take my word that its really fast.
Not quite like a blower car but if you are used to N/A its a nice increase.
The car won't see nitrous except at the drag strip.
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Joined: Mar 2007
Posts: 2,155
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From: Sydney, Australia
Vath ML63 Brabus C63 SL63 CLK63BS C63BS
Hey Mav,
I hate to disappoint you guys but there isn't much difference in the idle and driveabillity. With dual overhead cams you don't get that lopey idle. Its a little different but not much. The driveability is excellent. My car is stupid loud already with the race exhaust so a drive by won't show you much. You'll have to take my word that its really fast.
Not quite like a blower car but if you are used to N/A its a nice increase.
The car won't see nitrous except at the drag strip.
I hate to disappoint you guys but there isn't much difference in the idle and driveabillity. With dual overhead cams you don't get that lopey idle. Its a little different but not much. The driveability is excellent. My car is stupid loud already with the race exhaust so a drive by won't show you much. You'll have to take my word that its really fast.
Not quite like a blower car but if you are used to N/A its a nice increase.
The car won't see nitrous except at the drag strip.
Thread Starter
MBWorld Fanatic!
Joined: Sep 2008
Posts: 2,177
Likes: 14
From: Central Florida
2014 Audi RS7
I know she breathes better sitting still with the larger filters. I haven't been able to prove the ram air yet. That will entail multiple 60-130 runs with both set ups. That will require a private track rental, hopefully soon.
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From: North Jersey
2012 CTS-V
Thread Starter
MBWorld Fanatic!
Joined: Sep 2008
Posts: 2,177
Likes: 14
From: Central Florida
2014 Audi RS7
