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Highest HP From 243 Heads?

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Old Dec 7, 2024 | 06:20 PM
  #161  
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Originally Posted by HioSSilver
hard to say. I know a auto will eat some power. Richard Holdener has some vids of engine dyno and then that engine going into a car. I figure my 5.7 is somewhere around 620- 630 crank.
Well 53x SAE would be about ~600 flywheel given a 12% drivetrain loss.
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Old Dec 7, 2024 | 09:27 PM
  #162  
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Originally Posted by 4visking
I think Doug might understand it 🤔
He probably does. There’s only one person in here acting like the numbers are uncorrected tho.
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Old Dec 7, 2024 | 10:16 PM
  #163  
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Originally Posted by sxc Z28
He probably does. There’s only one person in here acting like the numbers are uncorrected tho.
Who is that? It certainly isn’t me.

If you have a complete understanding of how a Dynojet works then you would understand my request.

I may be wrong and if I am I will tip my hat. However, the fact that he refuses to give the information and is beating around the bush only makes it more suspicious.
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Old Dec 8, 2024 | 06:00 AM
  #164  
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Historical weather data is pretty easy to find. Just need a date, time and location.
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Old Dec 8, 2024 | 09:01 AM
  #165  
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Originally Posted by Keith
Historical weather data is pretty easy to find. Just need a date, time and location.
That is correct.
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Old Dec 8, 2024 | 09:04 AM
  #166  
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Originally Posted by 4visking
Who is that? It certainly isn’t me.

If you have a complete understanding of how a Dynojet works then you would understand my request.

I may be wrong and if I am I will tip my hat. However, the fact that he refuses to give the information and is beating around the bush only makes it more suspicious.
When you see a correction factor that means it has predetermined weather data already baked into the equation. Anyone can make more or less if the outside weather is different than those baked in numbers. Even in the most extreme cases, on a na car like this, you won’t see but a 10hp difference max one way or the other. Lastly, the car was on a well respected dyno at Keith’s Pit Stop nothing suspicious about it.
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Old Dec 8, 2024 | 09:11 AM
  #167  
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Originally Posted by sxc Z28
When you see a correction factor that means it has predetermined weather data already baked into the equation. Anyone can make more or less if the outside weather is different than those baked in numbers. Even in the most extreme cases, on a na car like this, you won’t see but a 10hp difference max one way or the other. Lastly, the car was on a well respected dyno at Keith’s Pit Stop nothing suspicious about it.
You fail to see my point.

All I am asking is to see if the weather that day matches the weather data on his dyno sheet.
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Old Dec 8, 2024 | 09:45 AM
  #168  
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Originally Posted by 4visking
You fail to see my point.

All I am asking is to see if the weather that day matches the weather data on his dyno sheet.
You fail to see common sense. STD is the correction factor you can’t just plug in whatever weather data you want unless it’s uncorrected. STD and SAE already have the weather data baked. It’s automatic so you don’t even know what you’re talking about.
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Old Dec 8, 2024 | 10:08 AM
  #169  
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For sure he does not
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Old Dec 8, 2024 | 10:11 AM
  #170  
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Originally Posted by sxc Z28
You fail to see common sense. STD is the correction factor you can’t just plug in whatever weather data you want unless it’s uncorrected. STD and SAE already have the weather data baked. It’s automatic so you don’t even know what you’re talking about.
Yes, if nothing shady went down then the weather data should match. You are the one who is confused.
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Old Dec 8, 2024 | 10:22 AM
  #171  
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Originally Posted by 4visking
Well 53x SAE would be about ~600 flywheel given a 12% drivetrain loss.
12% is likely low especially going through a 9" with oe brakes, solid axles, no lightened or polished gears, true trac diff, t56


at about 3:35 this guy splains his whp and crank hp. He's running through a race trans, most likely spool, hollow axles at a minimum. Could be lightened and polished gear set......most likely is and some fancy bearing possibly. He makes less at the wheels than my 5.7 and claims the same crank numbers.....I went off his numbers a little because I figured they were close and I would still be conservative. Maybe you should email him and ask his weather data because he clearly didn't state it. Tell him he's likely over stating his crank hp. You need to get that dude straight mang.
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Old Dec 8, 2024 | 10:24 AM
  #172  
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Originally Posted by HioSSilver
For sure he does not
Everybody sees it BUT him....
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Old Dec 8, 2024 | 10:27 AM
  #173  
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Weather correction factor only reduces hp and tq by a minimal amount so I don't see the point but if it makes you feel better to see a comparison here's a dyno pull on an LSX427 that shows the WCF.

https://ls1tech.com/forums/dynamomet...yno-pulls.html
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Old Dec 8, 2024 | 10:48 AM
  #174  
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Originally Posted by 01CamaroSSTx
Weather correction factor only reduces hp and tq by a minimal amount so I don't see the point but if it makes you feel better to see a comparison here's a dyno pull on an LSX427 that shows the WCF.

https://ls1tech.com/forums/dynamomet...yno-pulls.html
You are also confused. Also MD is worthless for comparison sake.
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Old Dec 8, 2024 | 10:50 AM
  #175  
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Originally Posted by G Atsma
Everybody sees it BUT him....
Yeah because a group of people have never been wrong before.
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Old Dec 8, 2024 | 10:58 AM
  #176  
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Originally Posted by HioSSilver
12% is likely low especially going through a 9" with oe brakes, solid axles, no lightened or polished gears, true trac diff, t56

https://youtu.be/7K2HJM0pWi8?si=tane9FE7mMvQAxgt

at about 3:35 this guy splains his whp and crank hp. He's running through a race trans, most likely spool, hollow axles at a minimum. Could be lightened and polished gear set......most likely is and some fancy bearing possibly. He makes less at the wheels than my 5.7 and claims the same crank numbers.....I went off his numbers a little because I figured they were close and I would still be conservative. Maybe you should email him and ask his weather data because he clearly didn't state it. Tell him he's likely over stating his crank hp. You need to get that dude straight mang.
Ok so he is wrong as well. You are making about ~600 crank HP.
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Old Dec 8, 2024 | 11:19 AM
  #177  
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Originally Posted by 4visking
Yes, if nothing shady went down then the weather data should match. You are the one who is confused.
You can’t change the weather data inputs with a correction factor. How can I make that more clear? It’s clear you aren’t adding much here.
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Old Dec 8, 2024 | 11:21 AM
  #178  
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Originally Posted by sxc Z28
You can’t change the weather data inputs with a correction factor. How can I make that more clear? It’s clear you aren’t adding much here.
You can change the “weather”. Not hard to understand. You are arguing beyond your depth.
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Old Dec 8, 2024 | 11:35 AM
  #179  
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Originally Posted by 4visking
Ok so he is wrong as well. You are making about ~600 crank HP.
Even at 600hp with a 346 that would still be 1.7 horsepower per cube.

Most optimized combos go make around 1.5 or so horsepower per cube on pump gas and a hydraulic roller. Most of these builds go spin under 7200 rpm or so and go be under 11.7 compression.

Take the most known LS stroker motor of all time which is the 408ci setup. Most/Alot go make 600 horsepower no matter the head, cam and intake.

Things start changing with high compression, race gas or E85, solid rollers cams and spinning the motor to the sky not to metioned the gains a good oil control on engine can make a difference. The little things makes a big difference in the end.
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Old Dec 8, 2024 | 12:03 PM
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Originally Posted by 4visking
Yeah because a group of people have never been wrong before.
Or maybe you're the wrong one.

Originally Posted by 4visking
Ok so he is wrong as well. You are making about ~600 crank HP.
Maybe.....or you're wrong. I can definitely see his being over estimated vs mine tho. You should contact him and tell him all about it. He would likely be very appreciative with your immense knowledge and background.

Originally Posted by sxc Z28
You can’t change the weather data inputs with a correction factor. How can I make that more clear? It’s clear you aren’t adding much here.
Oohh he knows how to cheat the dyno. You can tell by the power claims he's made. That's why when the cheated numbers he was so proud of got whipped bad he assumes someone else is cheating.

Originally Posted by 4visking
You can change the “weather”. Not hard to understand. You are arguing beyond your depth.
you see
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