Thread: Dodge Viper SRT10 ACR-X

Def. Hoosiers in the pics. I know they were testing there with different tires to see what they were gonna make standard for the new race series for the X. People that were there said the published times were on the mpsc's so the times could be directly compared to the reg. ACR. Either way, I want one. lol

Vid

2010 Dodge Viper ACR-X ready to fill your track-rat, spec-racing needs [w/ VIDEO] — Autoblog

Lol look at how worn out those pedals are.

Thats how I would want my pedals to look like if I had one

I wonder what is going to happen with the competition coupe? Will it stay in ALMS GT2 status or be axed?
The X definitely wouldn't be able to keep up with the CC.

On the roadworthyness note, all it needs to make it on the street is an owner with a road legal viper to change the plates over.

Nick

Originally Posted by white out

I wonder what is going to happen with the competition coupe? Will it stay in ALMS GT2 status or be axed?
The X definitely wouldn't be able to keep up with the CC.

On the roadworthyness note, all it needs to make it on the street is an owner with a road legal viper to change the plates over.

Nick

From what I've read the X is faster than the Comp coupe.....

Originally Posted by switchcars

From what I've read the X is faster than the Comp coupe.....

There is not a snowballs chance in hell that the X will keep a comp coupe in sight. Granted there are (as far as I recall) 3 different "comp coupes" for different classes (ALMS GT2, VIPER DAYS, etc) Even the lowest rendition would give the X a hard core beat down. There are videos floating around of a stock VD spec comp coupe just toying with GT3RS Cup car around the ring.

Look at this Oreca GT2 CC, no stock chassis car is going to be anywhere near this thing.

Originally Posted by anon

There is not a snowballs chance in hell that the X will keep a comp coupe in sight. Granted there are (as far as I recall) 3 different "comp coupes" for different classes (ALMS GT2, VIPER DAYS, etc) Even the lowest rendition would give the X a hard core beat down. There are videos floating around of a stock VD spec comp coupe just toying with GT3RS Cup car around the ring.

Look at this Oreca GT2 CC, no stock chassis car is going to be anywhere near this thing.

I agree with anon 100%.

Oreca was one of the first teams to run the original GTS at Le Mans. They also have a history running LMPs. Credit where credit is due, a French Le Mans team/program that privately raced Vipers and got Chrysler excited enough to get involved.

Keep in mind when comparing even the hottest street or factory club racer to a "Real" race car, that ALMS requires performance equalisation restrictors. On the F430 GT2 in ALMS configuration, the poor engine has to breathe through two 27mm restrictors! - Thats barely over 1 inch each. Also, in the case of the F430 GT2, the engine is a smaller displacement than the street version. 4 litres VS the street 4.3 litres. The F430 GT2 actually makes less power than a F430 street car. But lap time wise it would leave the road car in another time zone.

The Viper GT2 that anon posted would pretty much destroy the ACR-X on brakes and handling alone (where you make up more of a lap, than on power)

Originally Posted by Challenge It

I agree with anon 100%.

Oreca was one of the first teams to run the original GTS at Le Mans. They also have a history running LMPs. Credit where credit is due, a French Le Mans team/program that privately raced Vipers and got Chrysler excited enough to get involved.

The Viper GT2 that anon posted would pretty much destroy the ACR-X on brakes and handling alone (where you make up more of a lap, than on power)

Yeah, the Alcons and Motons alone would put miles on even a well prepped ACR.

I LOVE The Oreca GTS-R GT2 vipers from 97' era, and into 98' where iirc they won all but one race, including the 24h of Le Mans, up through 00'.

Some of the other GTS-R's were built to special class specs which allowed a wider chassis, those things looks NUTS. Viper from the side but looks like it's 3/2 scale head on.

The crazy weight penalties and air restrictors (From all the corvette guys crying about losing) were the main reason Dodge pulled out of ALMS in 01'. The car suffered so much it wasn't competitive. I'm all for leveling the playing field but when you hinder someone so much they leave the sport that isn't benefiting anyone, other the corvette advertising department. You can see the puny little snorkels in this picture... yeah, a 7,500 rpm 8L V10 is going to breathe through those.

^^^From what I remember, they (Oreca/Chrysler) maximized the torque curve and were pulling tall gears at low RPM. That was one of their keys to 24 hr durability.

Yeah, the Corvette guys are really proud of their ALMS GT2 debute this year...

...Even though they were given LARGER restrictors than Ferrari AND the engine being an additional 50% larger than Ferrari or Porsche. Corvette = 6 litres, Ferrari 4 litres, BMW 4 litres, Porsche 3.8 litres. Can you imagine if Ferrari, BMW and Porsche were allowed bigger restrictors AND 6 litres ???

Before anyone says anything about reliability - Ferrari won the 24 hour of Le Mans in GT2 in 2008 and again in 2009. The 2009 finish was Ferrari 1st, 2nd, 3rd and 4th!

I really am a big fan of the Corvette and Viper racing programs, but if they were required to compete on completely unbiased/fair displacement and restrictor rules, I suspect they would have a much more difficult time

Originally Posted by Challenge It

^^^From what I remember, they (Oreca/Chrysler) maximized the torque curve and were pulling tall gears at low RPM. That was one of their keys to 24 hr durability.

Yeah, the Corvette guys are really proud of their ALMS GT2 debute this year...

...Even though they were given LARGER restrictors than Ferrari AND the engine being an additional 50% larger than Ferrari or Porsche. Corvette = 6 litres, Ferrari 4 litres, BMW 4 litres, Porsche 3.8 litres. Can you imagine if Ferrari, BMW and Porsche were allowed bigger restrictors AND 6 litres ???

Before anyone says anything about reliability - Ferrari won the 24 hour of Le Mans in GT2 in 2008 and again in 2009. The 2009 finish was Ferrari 1st, 2nd, 3rd and 4th!

I really am a big fan of the Corvette and Viper racing programs, but if they were required to compete on completely unbiased/fair displacement and restrictor rules, I suspect they would have a much more difficult time

The GTS-R motor had a lot of changes from the standard viper v10 to the point they had specific block, cylinder heads, and an individual t/b intake manifold setup. The stock viper is done by 6500 but the R setups were able to turn up in the 7k range. They undersized the crank mains to 2.75 from 3", ran a special billet crank, dry sump, and the heads were lightyears better. Not especially huge differences in max flow but a lot better at low lift and much more port volume to feed the beast.

Are the corvette guys seeing a weight penalty for the displacement vs the other guys? I can't believe they gave them larger restrictors with a 6L motor. There is always a tradeoff in displacement vs rpm range to make HP and get it to the ground but breathing can kill that whole deal. The vette guys have always pitched a fit if they didn't get their way and I'm not sure why ALMS lets them get away with it.

I wouldn't agree with an overall displacement limit as obviously it wouldn't be in the interest of the whole "production class" spec that is GT2. Nobody would watch a 4L vette or viper and think it had anything to do with the actual car.

Personally I would set a standard restrictor size and make everyone breathe through the same pipe. Use 2L or 12L, whatever floats your boat but you're sucking through this coffee straw.