997 Turbo / GT2 2006–2012 Turbo discussion on the 997 model Porsche 911 Twin Turbo.
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so I dynoed my car today on maha....

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  #106  
Old 02-27-2011, 02:28 PM
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Air Fuel Ratio
 
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  #107  
Old 02-27-2011, 02:29 PM
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Boost curve
 
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  #108  
Old 02-27-2011, 03:04 PM
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Originally Posted by TTdude
The datalog looks very similar to mine (vtgs) on ~93 pump fuel. I'm running ~6.2s 100-200 kph with 4th gear only. On race fuel, I'm running ~5.8s. Karol, mods go with this datalog? I easily get confused as you can probably tell.
hmm... lucky you !!!

I found this long with 100-200 in 4,75 sec
if there is someone who can post it I love to send it.
thanks !

in log I mentioned you will also find 100-250km/h in 9,11 sec.

Bob, I'm sending this log to you, will not bother you anymore, thanks.
 

Last edited by 997 GT3 RS/TT; 02-27-2011 at 03:16 PM.
  #109  
Old 02-27-2011, 03:21 PM
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Originally Posted by 997 GT3 RS/TT
Bob, I'm sending this log to you, will not bother you anymore, thanks.
No problem.
 
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  #110  
Old 02-27-2011, 03:23 PM
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Maybe that boost fall is due to the wastegates being maxed out?
 
  #111  
Old 02-27-2011, 03:28 PM
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Originally Posted by bbywu
No problem.

thank you.
so whom vtg car accelerate like this on low boost?
 
  #112  
Old 02-27-2011, 03:29 PM
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Originally Posted by emadelta86
Maybe that boost fall is due to the wastegates being maxed out?
what do you mean?
 
  #113  
Old 02-27-2011, 03:45 PM
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Originally Posted by bbywu
No problem.
intake temp rise 14C during 100-250km acceleration.
is this good?

btw you have convince me, will build the second engine I have.
I will pass 850Ps on low boost.
 
  #114  
Old 02-27-2011, 04:18 PM
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Originally Posted by 997 GT3 RS/TT
thank you.
so whom vtg car accelerate like this on low boost?
What do you mean accelerate like this and low boost? How many Gs are you talking about? Some of your datalogs are 1.55 bar. That's not low boost. Is it just me that's confused? Why don't you tell us exactly what mods you have and times for those mods? If you're talking about gt3071s, are you saying your set-up is the fastest? We already know 3071s produce more power at lower boost that vtgs, so what's new here? What am I missing?

Originally Posted by emadelta86
Maybe that boost fall is due to the wastegates being maxed out?
His boost can fall off for a number of reasons but without knowing what supporting mods he's running, it's anybody's guess. This thread would be more interesting if things were specified. He's making nice power but I wouldn't say spectacular based on other gt3071s I've seen.
 

Last edited by TTdude; 02-27-2011 at 04:22 PM.
  #115  
Old 02-27-2011, 04:23 PM
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I mean acceleration from last data log Bob posted, 100-250km/h.
1,55 is only up to 5000rpm and at 7200rpm it's 1,16.
so I would call this low boost.
 

Last edited by 997 GT3 RS/TT; 02-27-2011 at 04:26 PM.
  #116  
Old 02-27-2011, 04:25 PM
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Originally Posted by TTdude
What do you mean accelerate like this and low boost? How many Gs are you talking about? Some of your datalogs are 1.55 bar. That's not low boost. Is it just me that's confused? Why don't you tell us exactly what mods you have and times for those mods? If you're talking about gt3071s, are you saying your set-up is the fastest? We already know 3071s produce more power at lower boost that vtgs, so what's new here? What am I missing?

His boost can fall off for a number of reasons but without knowing what supporting mods he's running, it's anybody's guess. This thread would be more interesting if things were specified. He's making nice power but I wouldn't say spectacular based on other gt3071s I've seen.

what do you mean my boost fall?
 
  #117  
Old 02-27-2011, 04:28 PM
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Originally Posted by 997 GT3 RS/TT
I mean acceleration from last data log Bob posted, 100-250km/h.
1,55 is only up to 5000rpm and at 7200rpm it's 1,16.
so I would call this low boost.
According to the graph Bob posted your boost falls off quite a bit. Why doesn't it hold 1.55 to red-line is the question?
 
  #118  
Old 02-27-2011, 04:30 PM
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Originally Posted by TTdude
According to the graph Bob posted your boost falls off quite a bit. Why doesn't it hold 1.55 to red-line is the question?
hmm...I can have 1,8 bar till the rev limiter.
but no need for that, my programmer did this not accidentally.
no need to run on high boost to produce power.
 
  #119  
Old 02-27-2011, 04:35 PM
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Originally Posted by 997 GT3 RS/TT
hmm...I can have 1,8 bar till the rev limiter.
but no need for that, my programmer did this not accidentally.
no need to run on high boost to produce power.
That was the question, whether it was programmed or a result of your mods. Thanks for your answer. So why did your programmer do this? Don't you want to see the max your set-up can produce? Right now I would say you are de-tuned.
 
  #120  
Old 02-27-2011, 04:42 PM
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ok, never mind...I just want to show that there is way to produce torque and power on mid boost level on regular fuel, that is all.

100-250km/h in 9,1 is that fast? no idea but probably nothing special.

let's finish here.
 


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