[FIA GT] JGTC and competitiveness compared to fia-gt?

[Carse]

I saw the jgtc from sugo on motors tv the other day and was wondering if, say, the toyota supra would be competitive in the gt class, because it surely wouldnt run in n-gt?

What engines do they run in the supra? Turbo charged 4 cylinder?

[JAG]

They are out and out prototypes and have virtually nothing to do with the road cars.

GTS cars have more power, but JGTC cars have better chassis and more downforce (at least until the Maerarti arrives).

[Homer Simpson]

They do allow more freedom in the rules, but they are not complete prototypes.

http://asia.vtec.net/beystock/honda/nsxgt2000/01.html

The Supra used to run a turbo inline-6.

[Kicking-back]

As far as I know, if you entered an FIA GT-spec car in JGTC they'd hit you with very restrictive penalties, so I assume FIA cars are quicker.

[E46]

Originally posted by Kicking-back
As far as I know, if you entered an FIA GT-spec car in JGTC they'd hit you with very restrictive penalties, so I assume FIA cars are quicker.

JGTC cars are faster than FIA GT, what happens is that this is a championship for Japan manufacturers and because of they have some advantages.

[sportscarsRULE]

The GT500 cars are restricted to around 500hp I beleive. And Toyota Supras in JGTC at one point ran the Corolla WRC engine. But the JGTC cars have some serious downforce (notice all the diveplanes and ugly bodywork).

[nsxr]

currently the supras run with a 5.2 liter v8. I dont think they ran a turbo six, but a turbo four. check the jgtcusa.com website under the rules. it says fia gt2 cars can compete. and the fia cars are faster. they have more power. but in handling its got to be the jgtc cars. i think given the right track the cars would be equal. intill the mc12 arrives!

[Speck]

Originally posted by nsxr
currently the supras run with a 5.2 liter v8.

This year its gone down to 4.5L. Apparently they changed the restrictor rules for 2004.

[JAG]

Originally posted by Speck
This year its gone down to 4.5L. Apparently they changed the restrictor rules for 2004.

Didn't they choose to run a smaller engine in return for less weight?

[Asa]

You will find out the answer to this thread by Nov, as Zhuhai is expected to host both JGTC (October) and FIA GT (Nov) this year.

Hopefully Pratt and Miller will get to enter their Corvettes at Fontana in the JGTC race, then we will have a even better picture.

[tblincoe]

good point Asa, i didn't realize that both series were supposed to visit the same track this year... should be interesting! i'm guessing that the JGTC cars are quicker than the FIA-GT cars. how much quicker i'm not sure because the FIA-GT cars do run more horsepower, but the JGTC cars are quicker through the twisty stuff.

[JAG]

A prodrive 550 is competing in the JGTC this year. However it has 100BHP less than FIA spec, a smaller, lower rear wing and no undercar venturies.

I would expect the Maserati to be quicker than a JGTC car, same goes for the works Corvette.

[JAG]

In the first round of the JGTC the Prodrive 550 qualified 15th and last of the GT500 cars, but only 4 seconds of pole.

When you consider this is a privateer car against works machines, with the restrictions I mentioned above, I would expect a works run FIA spec. 550, C5-R to be as quick, if not quicker than the JGTC cars. Thats before you consider the Maserati, DB9 etc.

[DiscoGoober]

In addition to FIA-GT and Le Mans-type cars, the JGTC USA site says DTM cars from 2000 are allowed in, also.

[Félix]

The JGTC cars get their advantage in aerodynamics... like FIA-GT cars are faster than LM-GTS cars for the same reason, altough honestly I can't see much differences... The JGTC cars obviously have very free aero rules to comply to, and can also have their chassis modified quite a lot. As an example, the NSX GT is filled with carbon parts, benifits from a lot of Dome LMP tricks (look at the airflow on the sides and around the wheels, and in fact that's probably the NSX that's pushing the S101's development...), has its Hewland 'box (Lister LMP, Courage C65) centrally mounted in the car, in front of an engine that's now a 3 liter turbocharged unit, with pushrods (or even more sophisticated solutions) all around. There may be some road NSX chassis bits to be found, somewhere in that carbon road Honda look-alike. DTM cars are faster than FIA GT ones too, and I have to say I don't really see where they make up much of their 125hp disadvantage.

They have underbody venturis/diffusers, and the rules are probably a bit more free than European GT ones. Nissan was performing test in a water tow-tank previously used by AAR for the front diffuser on its Skyline a few years ago...

It would be very interesting to see what they do to cars like the Prodrive 550, the numerous GT3Rs and 360s, the retired McLarens and the new JLOC Murcielago R-GT that was debuted last weekend... I'm not even sure they cut the power to 300/500 levels; but they run at higher weights than in Europe. Unfortunatly not much info gets to us, unless you speak Japanease.

[JAG]

The 550s etc. run smaller restrictors and more weight (the Mclaren ran more weight at least), plus smaller, lower wings and smaller diffusers than in ACO/FIA spec.

Although an FIA car is theorectically quicker than an ACO car, I have no doubt the Works C5-R is at least a couple of seconds quicker than the fastest FIA GT cars.

The Maserati, if prepared to the levels of the C5-R, should blow away the current FIA cars IMO.

The DTM cars are only a second or two quicker than the FIA cars on twisty circuits, with similar times on the quick circuits. Again, I think the C5-R would be quicker on all circuits.

In conclusion I personally think the GTS pace in the next few years will knock at least 3-4 seconds of current lap times, due to the more sophisticated cars and just as importantly, works backing.

[JAG]

Also GT500/GT300 are actually GT500+ and GT300+ officially.

The cars produce much more than 500BHP, otherwise why would Honda have to switch to a turbocharged engine due to being visibly slower on the straights than the turbocharged opposition, as the atmo engine could easily produce 500BHP.

Similar to the fact that WRC cars officially put out 300BHP, but put out more like 350BHP.