Walnut blasting dyno results
- Thread starter Tommiee
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What was the Odometer (Kms) reading up to this point?
And what was the owner's driving style to get those deposits? Gentle or aggressive? etc?
And what was the owner's driving style to get those deposits? Gentle or aggressive? etc?
gathermewool
Site Donor 2023
Why calculate CHP when you can simply show us the exact WHP measured by the dyno?
How many runs did you do before and after? Were the conditions exactly the same for the before and after runs?
How many runs did you do before and after? Were the conditions exactly the same for the before and after runs?
@gathermewool
We always use crank hp. The superflow always corrects to 1000mbar ambient pressure and 20 degrees celsius so yes the conditions are always thesame. Is was measured 1 day after eachother and the weather was thesame as the day before.
The power was reproducable every time again so it was a fair measurement.
We always use crank hp. The superflow always corrects to 1000mbar ambient pressure and 20 degrees celsius so yes the conditions are always thesame. Is was measured 1 day after eachother and the weather was thesame as the day before.
The power was reproducable every time again so it was a fair measurement.
Mileage was 115k kilometers / around 70k miles
Originally Posted By: DriveHard
cool pics, some of the worst valves I have seen!!
Back in the days of pushrod engines and carburettors, I've seen intake valves so carboned up the engine would hardly get off idle. We would chip it off using another valve, and finish on the wire brush...with the sweet taste of lead in your mouth. Um...even chipped them off in place, I can admit that 35 years later. So not new, and not restricted to GDI.
cool pics, some of the worst valves I have seen!!
Back in the days of pushrod engines and carburettors, I've seen intake valves so carboned up the engine would hardly get off idle. We would chip it off using another valve, and finish on the wire brush...with the sweet taste of lead in your mouth. Um...even chipped them off in place, I can admit that 35 years later. So not new, and not restricted to GDI.
Originally Posted By: i_hate_autofraud
What was the Odometer (Kms) reading up to this point?
And what was the owner's driving style to get those deposits? Gentle or aggressive? etc?
Driving style i don't know. My dad just recently bought it. But its a PSA/BMW engine that is known for intake deposits.
What was the Odometer (Kms) reading up to this point?
And what was the owner's driving style to get those deposits? Gentle or aggressive? etc?
Driving style i don't know. My dad just recently bought it. But its a PSA/BMW engine that is known for intake deposits.
Originally Posted By: Alex_V
Buy a new car that's more efficient and powerful thanks to the technology of direct injection... for the first 30,000 miles.
My 158k mile MS3 performed the same(based on in-gear acceleration runs) as it did at 30k miles.
Buy a new car that's more efficient and powerful thanks to the technology of direct injection... for the first 30,000 miles.
My 158k mile MS3 performed the same(based on in-gear acceleration runs) as it did at 30k miles.
gathermewool
Site Donor 2023
Originally Posted By: Tommiee
@gathermewool
We always use crank hp. The superflow always corrects to 1000mbar ambient pressure and 20 degrees celsius so yes the conditions are always thesame. Is was measured 1 day after eachother and the weather was thesame as the day before.
The power was reproducable every time again so it was a fair measurement.
Thanks for the reply.
Sounds like you guys did everything right, if the results were repeatable (I assumed a single-run-to-single-run comparison - sorry). This shows a massive change! Some guys spend hundreds just to tune their ECM/ECU for this kind of gain. It seems almost inconceivable how such little carbon buildup in a forced-induction engine can have such a drastic effect on output.
I'm still not understanding why you guys use CHP over WHP. Why calculate drive-train losses when the rollers and measuring equipment can simply measure what the wheels are outputting (i.e., what you're actually producing for usable power, to the road)? Is CHP a European thing or just where you are (I guess it could be big here, for all I know - I'm not super knowledgeable, which is why I'm asking)? Seems like it's only good for bragging rights, whereas WHP will offer numbers for direct comparison to other vehicles (e.g., one car COULD BE faster than another, if the area under the usable curve is better suited for a specific type of driving and it does not weigh more or have some other detractor, such as AS tires vs super stick Summers, etc.)
Finally, I'm not familiar with dyno software correction tables, but I've seen some instances in other fields where it's best to maintain conditions as close to the same as possible, because a significant amount of error could be introduced from converting using correction factors. Any idea of the practical error in dyno correction factors?
@gathermewool
We always use crank hp. The superflow always corrects to 1000mbar ambient pressure and 20 degrees celsius so yes the conditions are always thesame. Is was measured 1 day after eachother and the weather was thesame as the day before.
The power was reproducable every time again so it was a fair measurement.
Thanks for the reply.
Sounds like you guys did everything right, if the results were repeatable (I assumed a single-run-to-single-run comparison - sorry). This shows a massive change! Some guys spend hundreds just to tune their ECM/ECU for this kind of gain. It seems almost inconceivable how such little carbon buildup in a forced-induction engine can have such a drastic effect on output.
I'm still not understanding why you guys use CHP over WHP. Why calculate drive-train losses when the rollers and measuring equipment can simply measure what the wheels are outputting (i.e., what you're actually producing for usable power, to the road)? Is CHP a European thing or just where you are (I guess it could be big here, for all I know - I'm not super knowledgeable, which is why I'm asking)? Seems like it's only good for bragging rights, whereas WHP will offer numbers for direct comparison to other vehicles (e.g., one car COULD BE faster than another, if the area under the usable curve is better suited for a specific type of driving and it does not weigh more or have some other detractor, such as AS tires vs super stick Summers, etc.)
Finally, I'm not familiar with dyno software correction tables, but I've seen some instances in other fields where it's best to maintain conditions as close to the same as possible, because a significant amount of error could be introduced from converting using correction factors. Any idea of the practical error in dyno correction factors?
gathermewool
Site Donor 2023
Test.
On my phone and laptop I see my post as the last post of page 1 (post % 4672950). When I click on page 2, it shows nothing; a blank page...
Edit: now I see this post as the last post of page 1, with nothing on page 2...weird.
On my phone and laptop I see my post as the last post of page 1 (post % 4672950). When I click on page 2, it shows nothing; a blank page...
Edit: now I see this post as the last post of page 1, with nothing on page 2...weird.
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Thank you for posting pictures and DATA! There is so much conjecture and opinion going around that it's refreshing to have some real facts.
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