Given the fact that a K16 or "normal" turbo has a top speed of 189 MPH, what do think a stage 3 GIAC car will do with 560 HP / 560 TQ?

 

Isn't your top speed gear limited as opposed to power limited? If your gear ratios are the same, it won't matter what you have in there, you still won't reach it. Unless you change the ratios of course...

 

I honestly don't know and I definitely don't plan on trying. Just thought it might be fun exploring on paper.

 

Still pulling but lost my nerve.........

 

In order to get much above 190 MPH (certified time, not what the speedo shows) you have to remove the rev limiter, install a longer 6th gear and add some serious power. To show what can be done, a Sportec prepared 911 cabrio set a world speed record at Nardo and here is the info on that run:

In case you don't have your calculator handy, that converts to 227MPH!


The 580 HP strong Porsche Turbo Convertible with a long 6th gear by the Sportec manufacturer pulverised the former record and set a new benchmark for sporty convertibles. As a matter of course, all modifications obtainable from the Sportec manufacturer have a MOT approval - in Germany as well as in Switzerland.

 

Ari,

Does that mean a trip to Vegas (and some long open roads) is in order ?

 

What gear ratio would you possibly get then?? A stage 2 car would def. have the pull and power to even get up to 190 and beyond, so stg 3 without a doubt would def. be able to get above 190mph!

Im just wondering what gears you would need. I know in the M3's the 3.9/4.10 gears were good for NA cars and you lost your top speed , what's the stock diff ratio on the turbo's

 

Raise the rev limiter to around 7200-7300rpm. He should make over 200mph with that setup. I would say close to 205mph.

 

Just raise the rev limiter to ~7200-7300rpm. With a 3.44 rear, you wouldn't want to change that for the most part. Instead, you can change 6th gear to something around 0.55 - 0.5.

 

Here's a video of a TT on the 190mph limit:

http://videos.streetfire.net/Player....6463&kw=27&p=5

 

Actually a 0.70 gear does the job well! Reducing the Cd and/or frontal area goes a long way.Racer's tape helps with drag reduction too!


cheers

R

 

Damn, that was something. Pretty nuts to do it with other cars around. Imagine if some bozo changed lanes without looking.

Anyone ever do a salt flats run? That's be fun I imagine.

 

From what I understand the various GIAC programs do raise the red line, no? If this the case then it should go higher then the 189 MPH top speed of a lower redline stock car.

-- Michael

 

Nop! I've asked that and Stephen from Imaginauto said no. FVD does bump up the rev limiter to 7000...

 

My GIAC hits the limiter right at 6500.

190 in that video! That's some *****!

I guess the question has been answered. the top is gear limited at 190. My car would just there quicker. Pretty impressive if think that the car can pull from 40 to 190 one gear.