Forum Discussion
Huntindog wrote:
Perhaps the hood scoop is the reason the Dmax didn't dyno well.
A scoop would be pretty ineffective on a dyno.
It is very strange that the so called power loss is so high due to "drivetrain loss".
This is an area where the Dmax has always shined.
doubt the hood scoop had any effect. since duramax HP is the SAE certified spec, it is done with the engine stationary on a stand so any ram effect from speed isn't taken into account.- Perhaps the hood scoop is the reason the Dmax didn't dyno well.
A scoop would be pretty ineffective on a dyno.
It is very strange that the so called power loss is so high due to "drivetrain loss".
This is an area where the Dmax has always shined. FishOnOne wrote:
06Fargo wrote:
The altitude should not matter with turbocharged/intercooled engines.
It could be the special transmission programming, explained here:
Clicky
It does matter... Less oxygen in the air means less power. If you noticed on the video they even input a fudge factor due to the altitude/less oxygen.
very very true. doesn't make as big a difference as it does with a normally aspirated engine, but altitude still has an effect. Dyno numbers need to be corrected to STP (standard temperature and pressure) and for humidity. and it WILL affect real world performance as altitude increases.06Fargo wrote:
The altitude should not matter with turbocharged/intercooled engines.
It could be the special transmission programming, explained here:
Clicky
It does matter... Less oxygen in the air means less power. If you noticed on the video they even input a fudge factor due to the altitude/less oxygen.Turtle n Peeps wrote:
4x4ord wrote:
One truck can put 10,000 lb ft of torque to the rear axle and a second truck can put 20,000 lb ft of torque to its rear axle...Who is faster up the hill? There is no way of even guessing without knowing the rpm (or power). Now if we know the first truck has a 400 hp engine and the second truck only 200 we can have a high level of confidence that the 400 hp truck wins.
Someone gets it for once on this site!
Someone please make this post a sticky at the top and make it mandatory to read it before they can sign up! :B
LOL... :B4x4ord wrote:
One truck can put 10,000 lb ft of torque to the rear axle and a second truck can put 20,000 lb ft of torque to its rear axle...Who is faster up the hill? There is no way of even guessing without knowing the rpm (or power). Now if we know the first truck has a 400 hp engine and the second truck only 200 we can have a high level of confidence that the 400 hp truck wins.
Someone gets it for once on this site!
Someone please make this post a sticky at the top and make it mandatory to read it before they can sign up! :BFishOnOne wrote:
2001400ex wrote:
This one shows 404 and 880 for the Duramax a couple months ago. Wonder why the huge difference.
https://youtu.be/8TdzB4-15d8
Different dyno
Different driver
Different altitude
I expect that to about for differences of 5-10. Not 80.2001400ex wrote:
This one shows 404 and 880 for the Duramax a couple months ago. Wonder why the huge difference.
https://youtu.be/8TdzB4-15d8
Different dyno
Different driver
Different altitude- This one shows 404 and 880 for the Duramax a couple months ago. Wonder why the huge difference.
https://youtu.be/8TdzB4-15d8
