212mph 996GT2 anyone?

[cableguy]

Fantastic looking car on Rial Split Rims :Beer:

http://www.pistonheads.com/sales/193047.htm

Looks like member Freewheeler's old motor IIRC Does anyone know what performance mods were carried out to reach the claimed 580bhp? also 212mph seems a little far fetched IMO!

C.

[Brett928S2]

Hi

Well if its true , its 6 mph faster than a Carrera GT....

All the best Brett

[MOD500]

Probably Techart / Cargraphic engine mods if done by Tech 9, who would verify I am sure.

[clubsport]

Mathematically is 580bhp enough for 212mph in a 996?

I would have thought you would need >650-700 to have a shot, 212 is quite a bit above 200mph as it were, just interested

[MOD500]

Know what you mean CS, though guess the rev limiter has been raised, plus the 19 inch wheels will make a difference?

Does seem a bit high though!

[RichardD]

clubsport said:

Mathematically is 580bhp enough for 212mph in a 996?

I would have thought you would need >650-700 to have a shot, 212 is quite a bit above 200mph as it were, just interested

I wonder if the car has actually done this speed or was it calculated using something like this :-

http://www.cartestsoftware.com/cartest2000/index.h...

(which I have )

A 456bhp GT2 gives 191mph but this is with changing the diff to 3.0 from 3.44 Calculated using 0.34 drag coeff, 315/30 * 18 tyres, 20.9 sq ft frontal area.

Upping to 580bhp gives 206mph with 19inch wheels and changing the diff ratio to give max mph at max bhp gives 208mph - so not far off !

Anyway, how fast was the Mac F1 and that didn't have much more power!

[Guyr]

The Ruf RTurbo does 212mph with only 550bhp, so yes it's quite possible.

The more relevent issue is whether the car actually has 580bhp.

[cableguy]

Judging by the ad my guess would be Manifolds, Exhaust and ECU Re-Map to tie things together, 520-550bhp would be more realistic IMO, although 212mph seems a tad on the optimistic side.

Maybe Freewheeler can give us a little more info.

C.

[30121980]

Yeah,

But out of the pair off them, including cable guys..which one can you take out in the wet!!!!!

While mines in the garage for another 4 weeks under lock and key !!

all the best guys

[guyvert1]

Regardless of all that, its a stunning looking car...

[MOD500]

I suspect if the mod work has been done via Tech 9 the work will have included larger turbos and other bits, and not a simple remap only.

[Brett928S2]

Hi All

To get over 205/206 mph....you NEED over 700 hp....so personally I think the day that does 212 mph is the day after the Pope gets married...lol

Unless they can prove it of course ???? Timing ticket ???

All the best Brett

[Freewheeler]

cableguy said:

Judging by the ad my guess would be Manifolds, Exhaust and ECU Re-Map to tie things together, 520-550bhp would be more realistic IMO, although 212mph seems a tad on the optimistic side.

Maybe Freewheeler can give us a little more info.

C.

Definitely my old car!!

Loved it to bits!!

[Guyr]

Brett928S2 said:

To get over 205/206 mph....you NEED over 700 hp....so personally I think the day that does 212 mph is the day after the Pope gets married...lol

Thats utter nonsense. A 996GT2 does 196mph as standard with 462bhp. To reach 206mph requires 536bhp using the cube rule, which fits with the proven top speed figures from cars developed by Ruf and RS Tuning etc.

[Brett928S2]

Guyr said:

Brett928S2 said:

To get over 205/206 mph....you NEED over 700 hp....so personally I think the day that does 212 mph is the day after the Pope gets married...lol

Thats utter nonsense. A 996GT2 does 196mph as standard with 462bhp. To reach 206mph requires 536bhp using the cube rule, which fits with the proven top speed figures from cars developed by Ruf and RS Tuning etc.

Hi

Umm what about aerodynamics ???

You SERIOUSLY think thats 7mph faster than a Carrera GT ?? LOL...

The previous owner is here on this thread...what is his opinion of whether it does 212 mph ??

I still say....day after Pope married.............

All the best Brett

[Guyr]

With respect you clearly need to do more research about speed, both in theory and in practice. Some theory is here:

http://forum.physorg.com/index.php?showtopic=14909

212mph is only 8.1% faster than a stock GT2 with 462bhp, the Physics rule is that increasing speed requires the cube of power, so to double top speed you need 8x the power. To produce an 8.1% increase in speed (assuming optimal gearing) therefore requires a 26.5% increase in power to 584bhp - spot any linkages here?

CGT is not relevent as it has a very high-downforce design that produces high-drag thus limiting it's top speed. Its cD is 0.4 which is very high

Edited by Guyr on Wednesday 27th June 19:36

Edited by Guyr on Wednesday 27th June 19:37

[Brett928S2]

Hi

Lol....I have driven cars at OVER 300 mph...one thing I do know about is speed

For someone whose car has done 202 mph you seem not to.....with how many hp ???

The CGT is relevant....both in hp and gearing...what makes you think this car has the diff to do 212 ??

All the best Brett

ps. that link page is theoretical rubbish....first line starts "Neglecting air resistance and drive train resistance"....yeah right

Edited by Brett928S2 on Wednesday 27th June 20:22

Edited by Brett928S2 on Wednesday 27th June 20:23

[boony]

Brett928S2 said:

I have driven cars at OVER 300 mph...

Me too, Project Gotham is great isn't it!?

Sorry, couldn't resist.

[identti]

Brett928S2 said:

Hi All

To get over 205/206 mph....you NEED over 700 hp....so personally I think the day that does 212 mph is the day after the Pope gets married...lol

Unless they can prove it of course ???? Timing ticket ???

All the best Brett

You don't need over 700bhp at all. The Mclaren F1 did 241mph with 636bhp.
The RUF Yellowbird did 211mph with only 470bhp. Friction and aerodynamics are more important.

Also read GuyR's comment.

[TB993tt]

Brett
your statement about needing 700hp to go over 207mph is incorrect. The original CTR did it with around 500hp. A year later the white RS Tuning wide bodied 930 was entered in the Guiness book of records for doing 216.20mph using 580hp -this same engine had been tested by the TUV at 510hp and had a couple of mods for the run...
The specially aerodynamic RS Tuning 993 with sloped windscreen topped out at 221mph using 533hp maximum.
Wasn't the Mclaren capable of 240mph from 6XXhp ?

As far as the CGT - it is the fastest road going car Porsche have ever made and they made sure it sticks to the road at its 207mph maximum-the same engine in a slippier car could doubtlessly beat 212 IMHO

Edited by TB993tt on Wednesday 27th June 20:52