CloseQuote:
Moogle said:Quote:
Joost said:
Wow, looking very good!
BTW, what is the difference between the turbo skirts and the GT2 skirts?
-Joost-
I don't think there is a difference (?)
Jun 19, 2008 12:40:29 PM
Jun 19, 2008 4:30:25 PM
Quote:
TB993tt said:
Just thought I would drag this up....
The claimed 600hp GT2 look alike managed 185mph at recent airstrip run "vmax" which is rolling start and maximum speed after 1.6miles.
OK the GT2 spoilers are going to drag quite a bit more than a stock 997tt but this speed is more like 470hp - It was 23 degC, sounds like a heat soak special to me
Jun 19, 2008 5:41:28 PM
Quote:
Alex_997TurboRSC said:
Was Nick annoyed?
What did your old CGT get to on the same strip Toby?
but it manages about 194mph on this length of runway, it is right about on the limiter there anyway so it is actually its vmax !Quote:
TB993tt said:Quote:
Alex_997TurboRSC said:
Was Nick annoyed?
What did your old CGT get to on the same strip Toby?
"Nick" is the owner ? I've no idea if he was annoyed, I wasn't there.
You have to remember 185mph is still a very high top speed especially since there is a very limited stopping area.
I am purely interested in the tuner hp claims vs top speed for which there is loads of data now for this venue. An X50 996tt with 450PS also did 185mph but this GT2 bodied 997tt will have a CdA of around 0.66 compared with 0.62 for the 996tt.
The 23 DegC of the day seemed to be affecting a lot of the speeds with the Rt12 at 202mph being 9mph down on its best speed here.
With 23 DegC a "non" conservatively tuned tt could have air intake temps at up to 70DegC which will pull timing by ~6 degrees which is enough to chop 80-100hp off optimum - this may be what Shavster's experienced ?
My CGT would run 193mph, no more, with its CdA of 0.768 but major drag induced by the downforce. You prob saw the video against the Rt12 - checkout how the CGT runs into an aero brick wall at about 180mph and the Rt12 charges by
http://www.youtube.com/watch?v=ae2PAOMBSZ8
and another in car (CGT)(don't mention the fluffed 2nd/3rd shift
http://www.youtube.com/watch?v=czwXwGER7Do
We did a coastdown test from 295kph to calculate the drag on my uniquely set up 993tt and it came in at CdA 0.72 so it is a bit of a brick
Another repeated clip: http://www.youtube.com/watch?v=tmsT6I0iPmM
Quote:
shavster said:
Hello every one,
So to clear up a couple of things.... Firstly I currently have a issue with the car which means that the boost wont go above 1.0 bar beyond 4000 rpm and then drops conciderably. This is being looked at as I type. This effectively meant i was running near to stock power and with the heat drain probably below.
Secondly my rev limit it stock so even if i was boosting 1.4 bar with the hybrid turbos i would only be going as fast as stock car's vmax.
Thirdly I have to admit i was more than a little scared going at these speeds. With the sight of the end of the runway looming I found it difficult to keep the power on through the speed traps.
I had a great day and will try to push myself harder next time
Quote:
TB993tt said:Quote:
shavster said:
Hello every one,
So to clear up a couple of things.... Firstly I currently have a issue with the car which means that the boost wont go above 1.0 bar beyond 4000 rpm and then drops considerably. This is being looked at as I type. This effectively meant i was running near to stock power and with the heat drain probably below.
Secondly my rev limit it stock so even if i was boosting 1.4 bar with the hybrid turbos i would only be going as fast as stock car's vmax.
Thirdly I have to admit i was more than a little scared going at these speeds. With the sight of the end of the runway looming I found it difficult to keep the power on through the speed traps.
I had a great day and will try to push myself harder next time
Kudos for telling us about problems, very many people gloss over problems with tuners wares and IMO it is a very important issue which one should take into account when assessing....
The top speed for the 997tt should be around 205mph if it revs to 7K , if you have real 600hp then you should get close to that on the 1.6 mile run in a 997tt although your GT2 appendages would probably "drag" you back to high 190s...The Techart GT Street (which CdA 0.68 compared to GT2 0.66) managed 194mph on that same runway....
I agree entirely what you say about those speeds with the limited stopping area, we sometimes joke about "Lemmings" since the danger is very real - just take it carefully
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