Supermodel Dyno
#61
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That dyno chart looks a lot like mine. Woody's has more boost and a bit more torque.
post 173
https://rennlist.com/forums/showthre...&page=14&pp=15
post 173
https://rennlist.com/forums/showthre...&page=14&pp=15
#62
Racer
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Sniper,
That's the point. Nobody was trying to decieve anyone. The first dyno had some strange numbers, so I went to another dyno. In the end, there was only a 10rwhp difference.
That's the point. Nobody was trying to decieve anyone. The first dyno had some strange numbers, so I went to another dyno. In the end, there was only a 10rwhp difference.
#64
Three Wheelin'
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Originally Posted by all4woody
Lagavulin,
I originally posted my dyno sheet on this board to get some positive feedback and some backslaps from my "friends" in the Porsche community.
It seems all you did was figure out ways to discredit my hard work, instead of giving helpful suggestions to correct the problem (which I expect from this forum).
I originally posted my dyno sheet on this board to get some positive feedback and some backslaps from my "friends" in the Porsche community.
It seems all you did was figure out ways to discredit my hard work, instead of giving helpful suggestions to correct the problem (which I expect from this forum).
One last time. There is no way a second dyno run can come close to an initial dyno run whose SAE Correction Factor was 1.16. Look at the atmospheric readings and SAE Correction Factor of your initial baseline run versus your 'after' run.
Go back and do the calculations yourself, that is why I always post the simple formulas so that anyone can take them and experiment with whatever numbers they choose. The numbers themselves do not lie, and the 1.16 CF stands out like a sore-thumb to those who can 'see'.
At the very least, you will learn more than you counted on prior to your post!
#65
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Wow,
Woody Says "That's the point. Nobody was trying to decieve anyone. The first dyno had some strange numbers, so I went to another dyno. In the end, there was only a 10rwhp difference."
That says it all!
We now have folks on the list who defy the physics of the day ... Jim H, Woody and ..... who is next??
Have fun guys.
Woody Says "That's the point. Nobody was trying to decieve anyone. The first dyno had some strange numbers, so I went to another dyno. In the end, there was only a 10rwhp difference."
That says it all!
We now have folks on the list who defy the physics of the day ... Jim H, Woody and ..... who is next??
Have fun guys.
#66
Racer
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Lag,
There you go again cutting and pasting only what you want people to see. This puts a slant on things. Why not past my second sentence "There were some indiscretions with the dyno setup".
Anyone else, read my post on the previous page. I'm done with this BS. Woody.
There you go again cutting and pasting only what you want people to see. This puts a slant on things. Why not past my second sentence "There were some indiscretions with the dyno setup".
Anyone else, read my post on the previous page. I'm done with this BS. Woody.
#67
Three Wheelin'
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Originally Posted by all4woody
Lag,
There you go again cutting and pasting only what you want people to see. This puts a slant on things. Why not past my second sentence "There were some indiscretions with the dyno setup".
Anyone else, read my post on the previous page. I'm done with this BS. Woody.
There you go again cutting and pasting only what you want people to see. This puts a slant on things. Why not past my second sentence "There were some indiscretions with the dyno setup".
Anyone else, read my post on the previous page. I'm done with this BS. Woody.
Here is a dyno-sheet of THE BEST 928 twin-screw installation on the planet as of today, running 9lbs of boost:
http://members.rennlist.com/v1uhoh/perfnumbers.htm
Firstly, note the 'normal' SAE Correction Factor of 1.05.
Now look at the power output at 9 psi: 402 rwhp.
Tony's running an automatic, so what would he theoretically do if he had a manual?
Using 80% drivetrain loss for auto:
chp = rwhp / .80
chp = 402 / .80 = 502.5 crank hp, a very gain over stock
Now, what would the rwhp be with a manual using 85% loss?
rwhp = (crank hp) x (drivetrain loss)
rwhp = 503 x .85 = 427.6 rwhp
So somehow, you put out more power with 7.5 psi than Tony's car at 9 psi!
Taking this one step further, let's do the calcs I did earlier with your numbers using Tony's results, again, to make it simple, we'll ignore thermal losses.
First we find the Pressure Ratio (..PR)
PR = (boost + 14.7) / 14.7
PR = (9psi + 14.7psi) / 14.7psi = 1.6
Using the PR, we'll find the Forced Induction horsepower (..FI-HP)
FI-HP = (crank hp) x PR
FI-HP = 320 chp x 1.6 = 512 chp (..does that number look vaguely familiar?)
Finally, the rwhp with both an automatic and a manual:
rwhp = (crank hp) x (drivetrain loss)
rwhp = 512 chp x .85 = 435.2 rwhp for a manual
rwhp = 512 chp x .80 = 409.6 rwhp for an automatic
The bottom line: Tony's dyno clocks in with what the numbers say it should. The optimistic 410 rwhp is a near dead-ringer for his listed 402 rwhp. On the other hand, your numbers are not even close.
Concluding, it looks like we have a DYNO-GATE on our hands!
"There were some indiscretions with the dyno setup".
#68
Drifting
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Lag,
Tony's system is the best looking, I'll give you that. Tony's setup is the best for you because it puts out lower HP per psi boost than any of my setups that have been dynoed. So I am sure you love it for that reason. I put out as much HP with The Jag/Eaton system at 8.5psi on my car as Tony's setup did. Could be his transmission, or something else.
So once again you try to use twisted information to support your belief that you you are more intelligent and superior.
For a small consulting fee you can get the proper information about the thermal efficency of the twin-screw from Corky Bell. Please do this before you develop health problems worrying about how the twin-screws can support as much power as they do.
You need to point out where I threatened you over on the other thread too.
Sincerely,
Andy Keel
Tony's system is the best looking, I'll give you that. Tony's setup is the best for you because it puts out lower HP per psi boost than any of my setups that have been dynoed. So I am sure you love it for that reason. I put out as much HP with The Jag/Eaton system at 8.5psi on my car as Tony's setup did. Could be his transmission, or something else.
So once again you try to use twisted information to support your belief that you you are more intelligent and superior.
For a small consulting fee you can get the proper information about the thermal efficency of the twin-screw from Corky Bell. Please do this before you develop health problems worrying about how the twin-screws can support as much power as they do.
You need to point out where I threatened you over on the other thread too.
Sincerely,
Andy Keel
Last edited by GoRideSno; 07-21-2005 at 12:42 AM.
#71
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>Next year, NC...
Already have a portable DynoJet arranged for next years Sharks in the Mountains :-)
Already have a portable DynoJet arranged for next years Sharks in the Mountains :-)
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#72
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Originally Posted by marc@DEVEK
Tony has lower compression with his setup. He machined his pistons ...quite nicely I must add!
Marc
Marc
#73
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Beating a dead horse. Is the discussion that 460rwhp can't be made, or that it can't be made by a twin-screw? The Murph kit, which was one of my other choices, put down 463 with the same setup as mine.
#74
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I made over 460 with a twin screw and have the dyno sheet to prove. Your sheets, however, are doctored
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Originally Posted by all4woody
Beating a dead horse. Is the discussion that 460rwhp can't be made, or that it can't be made by a twin-screw? The Murph kit, which was one of my other choices, put down 463 with the same setup as mine.
Last edited by Jim_H; 07-21-2005 at 02:34 AM.