996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

Do you really need big heads/valves for nearly 1000hp?

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Old Oct 10, 2009 | 08:50 AM
  #31  
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Originally Posted by vrybad
I totally agree, these cars are extremely close.
The power curves are nearly identical, the only difference being in the upper rpm range.
IT will definately come down to driver between these two cars. I dont think the 100 lbs of pig iron that I put in his fender wells will have any effect at all
 
Old Oct 10, 2009 | 08:57 AM
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Originally Posted by cjv
Yes there can very well be a loss between two dyno runs. If you have heat sink in your induction air and intercoolers you will see a pronounced difference.

That was why I mentioned additional parasitic losses.

Let me put my thoughts this way.
What does a stock 996tt lose on a dyno pull, maybe 80hp based on rw to fw numbers?
If you double the fwhp to 800, will there be double the drivetrain loss, all things being equal-reasonable iat's, similar coolant temps, similar ambient temps, etc?
I just have a difficult time believing, because it has never been proven to my knowledge, that there is a fixed percentage of loss through any drivetrain, again, all things being equal other than power output of the engine.

That's all I'm saying, and the reason I couldn't care less about flywheel estimates!
 
Old Oct 10, 2009 | 08:59 AM
  #33  
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Originally Posted by KPG
IT will definately come down to driver between these two cars. I dont think the 100 lbs of pig iron that I put in his fender wells will have any effect at all
Did you already do it, or will we have to distract him at the mile?
 
Old Oct 10, 2009 | 09:00 AM
  #34  
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Originally Posted by KPG
Thanks! Hopefully you can get your car to the mile in the future. I think it would be a great selling point for Mark. Hope the weather improves and you can get the track rental in before it too bad up there
Oh i am trying my hardest to get out!
I hope that i can get out tonight, the weather here looks good for some runs.. and i would love to post some numbers for Mark.

Again best of luck!
 
Old Oct 10, 2009 | 09:16 AM
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Originally Posted by vrybad
I totally agree, these cars are extremely close.
The power curves are nearly identical, the only difference being in the upper rpm range.
Either way, your car should be a very strong runner, for sure!
Nice results.

OH please!!! don't swell up his head!!! he needs to keep those burgers he eats in check....
 
Old Oct 10, 2009 | 10:04 AM
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Originally Posted by topgun
OH please!!! don't swell up his head!!! he needs to keep those burgers he eats in check....


(did someone say burgers? I'm all over that!!)
 
Old Oct 10, 2009 | 10:35 AM
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Originally Posted by topgun
OH please!!! don't swell up his head!!! he needs to keep those burgers he eats in check....

you know that is what I was thinking. he weighed his car in at 3750. Mine weighed in at 3650 with me and 5/8 tank of gas. and it is all stock body with aftermarket exhaust. Someone has been eating to many burgers.
 
Old Oct 10, 2009 | 01:24 PM
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KPG,

Great results with new tune! Cant wait to see it run at the MILE !!

I do not recall what kind of Power DIVEXX car made in its current state of tune
but I believe it was stock heads and valves with custom cams.

Great results and yeah it is hard to say what actual crank HP your cars are,
other than...ALOT (800 measured on an AWD dyno, wow)
 
Old Oct 10, 2009 | 02:15 PM
  #39  
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Scotts number at the wheels was 889 I believe. Nice numbers Kev and Tom. See you guys on Friday.
 
Old Oct 10, 2009 | 04:53 PM
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Originally Posted by topgun
Another thing Kevin did not mention is that these are full Ecu controlled cars (no Boost controller, external wastegates or large y pipes) therefore keeping all the safety measures in place.
This is whats impressive about this setup -Congrats on the numbers KPG.

There are certainly different ways to get to this level but its the attention given to keeping some of the components relatively tame yet still producing impressive power that is the big news.

Again, congradulations - I look forward to hearing some more numbers from this setup.
 
Old Oct 10, 2009 | 04:57 PM
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First off I'd like to mention that I am posting this from my phone so pardon the spelling and grammar usage. I am in the backwoods of Texas right now blowing off some steam like a real redneck, which means lots of use of assault rifles and 4wheelers!

Kevin and Tom those are some insane numbers right there! EVOMS really took care of you! They are going to be a beast in both the 1/4 and the mile!!

I don't see why everyone is making a big deal cause they are a few hp shy at a point when 25hp really doesn't make a crap of difference as far as your 1/4 and mile go.

And Sean I consider you a friend since you invited all of us over to your house for dinner when we all did not know each other. But man you really just need to lay off the silly pills lol! First you made 665rwhp SAE yet you claim 690rwhp all the time. You are not going to gain 50-60rwhp by going with a new intake system and intercoolers. You are going to have to up the boost or change out exhaust wheels. You got what I'd like to call "sold" by a salesman.

Now as far as trying to diss Kevin's first and only real try at a 60-130 on his new setup was just dumb. He went .2 faster than you without waiting for the perfect weather and air, etc. If I remember you had the driftbox a month doing runs all the time and averaging in the 6.0 area. You had one good pass and that's it. Your car is a one hit wonder at this point. Atleast I went 109 in the 1/8th 2 or 3 times and 137 in the 1/4 at least twice all in the heat.

All we ask is just please listen to people before you post sometimes. Like we got the biggest kick out of how you think you will lose by 2 or less cars when racing my brothers Vette even though spinning it still went .5 1/10s faster than you in the heat with very little traction on a 60-130 pass!

Anyway I'll see everyone at the Mile! I've got a lot of work ahead of me. I still need to do brakes, coilovers, and a cage before Friday night. But I am out of money at the moment to spend on the car with taxes coming up so the work is going to be done by Team Skinny White Dude Racing again. If anyone makes it to Houston before Friday is welcome to come by the parents house (my house does not have all my tools, parts, etc at it) and help if we aren't finished by then. I will provide the food and beer lol!
 

Last edited by Powell; Oct 10, 2009 at 05:01 PM.
Old Oct 10, 2009 | 05:05 PM
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Good luck Chris. We are leaving Friday morning. See you guys down there.
 
Old Oct 10, 2009 | 05:44 PM
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Originally Posted by vrybad
That was why I mentioned additional parasitic losses.

Let me put my thoughts this way.
What does a stock 996tt lose on a dyno pull, maybe 80hp based on rw to fw numbers?
If you double the fwhp to 800, will there be double the drivetrain loss, all things being equal-reasonable iat's, similar coolant temps, similar ambient temps, etc?
I just have a difficult time believing, because it has never been proven to my knowledge, that there is a fixed percentage of loss through any drivetrain, again, all things being equal other than power output of the engine.

That's all I'm saying, and the reason I couldn't care less about flywheel estimates!
I also have never understood this whole increasing drivetrain loss either.
I have always thought that if X dyno, dynos a stock 996TT that has 415 crank hp and it does 315 hp on the dyno (100 hp loss) THEN if it pulls
600 hp on the same dyno it would (in theory) have about 700 crank hp
(one has to make the assumption that the stock TT does have 415 as Porsche claims).
Blah, blah, I am tired of even my own explaination.
Congrats KPG on having a truly beautiful "MONSTER" and one of the fastest Pcars on the planet.
 
Old Oct 10, 2009 | 07:09 PM
  #44  
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Originally Posted by WOODTSTER
I also have never understood this whole increasing drivetrain loss either.
I have always thought that if X dyno, dynos a stock 996TT that has 415 crank hp and it does 315 hp on the dyno (100 hp loss) THEN if it pulls
600 hp on the same dyno it would (in theory) have about 700 crank hp
(one has to make the assumption that the stock TT does have 415 as Porsche claims).
Blah, blah, I am tired of even my own explaination.
Congrats KPG on having a truly beautiful "MONSTER" and one of the fastest Pcars on the planet.

See, you understand where I am coming from, as I'd guess, others do, too.
I believe it is more of a fixed loss based on a given drivetrain design, with some minimal parasitic losses included for additional heat, etc.
This has always made for a good discussion, if nothing else. lol

Either way, these cars are crazy making 800whp!!
 
Old Oct 10, 2009 | 07:12 PM
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So to continue this useless discussion...car "A" on Dyno "A" loses 80hp. That car, on that dyno, only loses 80hp, regardless of the level of power?
 


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