ACR viper disapointment...

sick408dakr/t · Mar 29, 2010

Here's my .02:

This is not a race engine, it runs on 93 octane - stock compression 10.2:1
This motor does not have a dry sump system.
This motor is NOT forged.
This more is NOT internally balanced.
This motor has stock cam, heads(unported etc.), intake etc.
This motor is exactly the same motor as in the street car EXCEPT for LTs, Exhaust and Tuning - that's it!

The aftermarket has easily exceeded 750RWHP NA - try that with your Lambo or Ferrari. The V10 in the ACR/X is NOT a damn racing engine. Back in 2000, the V10 in the ORECA Vipers, racing in FIA GT class, were making 800HP(limited by the powers that be) from 8 liters with dead-bang reliability.

Edit: Lolz @ this thread.

danbap · Mar 29, 2010

one thing, im pretty sure the engines are forged from the factory

gocartone · Mar 29, 2010

danbap said:
one thing, im pretty sure the engines are forged from the factory

1996-1999 was, after that they switched to cast pistons. The 96-99 is the strongest stock motor and will handle the most power with bost without touching anything (1000whp with stock block).

clint282cc · Mar 29, 2010

were the rods and crank cast?

gocartone · Mar 29, 2010

clint282cc said:
were the rods and crank cast?

If I remember right the rods and crank have always been forged, they just swicthed from the forged pistons to the weaker cast ones after 99. Could be wrong on that though.

boohoops · Mar 30, 2010

clint282cc said:
YOUR GOING TO TELL ME I CAN GO BUY THAT CAR FROM THE FACTORY?

ZR1 vette. may be boosted but it makes 650hp for $125k. thats with a warranty.

yea the ZR1 is boosted, this is not.. imagine if th viper was boosted, itd produce a lot more than the ZR1.. and u can buy an ACR from th factory, not one modded like this no

clint282cc said:
now you guys are calling me a retard cause i think 640hp is not a lot out of a race car.

your right, nascar motors only make 850hp out of a narrow band of the rpm. agreed. and a road race car needs to make it throughout the powerband. BUT that v-10 only has a powerband window of of 4500 rpm. "2k to 5500"

CORR trucks alos make 850-900hp and they are on running high rpms and low out of some of the hairpin corners. i know they arent running as long as 24hrs BUT they do not rebuild the motor after every race like nascar or NHRA.

the ZR1 is a factory, mild tuned motor and its producing 638hp at what? 8lbs of boost? the motor can handle more, we all know that, but its from the factory, reliable, and cheap. the viper which is the same amount of money, is producing 505hp with a v-10, no boost but just as reliable... even the z06 is faster around the track than a viper. what im saying is, the viper may look badass but on paper, its numbers are WAY low.

ive blown up 3 motors in 4 years i think lol and your right, it was all impatience. but i only have 3 years experience or less in motors, not TWENTY NINE. and once my motor IS put back together it will have about 400hp to the wheels which is double the 200 from the factory. so if a young punk like me can build a motor to have 100% more power and still keep it reliable "which im sure my motor would last if i wasnt the driver and i had it tuned" why cant this Chrysler tech. get more out of a v-10. i dont expect 1000hp "100% increase" out of a n/a motor but damnit, 21% increase? laaaame.

what did they do to it? free up the exhaust? buy a out of the box cam? put a k&n intake on it? that sounds like it should get about 100hp out of a stock motor right there....

again, ur arguing that a boosted motor makes more power than a n/a, why? obviously th boosted one will make more :wave: and in case you dont kno, if the viper ACR is such a poor contender, then why in the hell does it hold th fasted lap record at Nurburgring??? o yea, and thats a stock viper acr thats holding the record too.. ill agree with u on the baja trucks tho, i was gonna mention the same thing but u got it first lol

i havent watched th video yet cuz im in class but it sounds as though this tech didnt go balls out on the build, have any of u considered that there are different classes for racing and each class has certain restrictions and regulations? maybe thats why hes only pumpin out 640hp:huh:

clint282cc · Mar 30, 2010

boohoops said:
yea the ZR1 is boosted, this is not.. imagine if th viper was boosted, itd produce a lot more than the ZR1.. and u can buy an ACR from th factory, not one modded like this no

gain, ur arguing that a boosted motor makes more power than a n/a, why? obviously th boosted one will make more :wave: and in case you dont kno, if the viper ACR is such a poor contender, then why in the hell does it hold th fasted lap record at Nurburgring??? o yea, and thats a stock viper acr thats holding the record too.. ill agree with u on the baja trucks tho, i was gonna mention the same thing but u got it first lol

i havent watched th video yet cuz im in class but it sounds as though this tech didnt go balls out on the build, have any of u considered that there are different classes for racing and each class has certain restrictions and regulations? maybe thats why hes only pumpin out 640hp:huh:

another person who didnt read the whole thread and is putting their idea out there that has already been said....

go back and read before you post. i already figured out it is not a race car so 640 from the factory is very good, i made the mistake... READ

boohoops · Mar 31, 2010

clint282cc said:
another person who didnt read the whole thread and is putting their idea out there that has already been said....

go back and read before you post. i already figured out it is not a race car so 640 from the factory is very good, i made the mistake... READ

lol, im a college student, wtf is this "reading"?! btw i wasnt tryin to bag on u, u just had the most posts debating against it was all

rtgrouchman · Mar 31, 2010

Don't know if you guys ever seen this video, kinda old......

http://www.youtube.com/watch?v=yBEeo6l3a6s&feature=related

Now that's impressive!!

CAM · Apr 1, 2010

I saw the thread title and being from the Viper forum side of things thought to chime in and clear up a few things.
First off as others touched on the modern Viper V10 has nothing to do with the spliced 5.9 motor they used back in 89 to make one the first prototype models. Actually as early as the actual Gen1 production cars there were already more differences between the two set ups then one could count such as the 488CID aluminum block, forged crank shaft, 9.1:1 compression ratio 6K redline, 4.00x3.88 bore, coil packs firing at 90 and 54 degree intervals. And the Gen 2 and 3 motors saw even more changes then that.

As some of you know the Gen 4 cars still used the V10 powerplant but was completely revised using Variable Valve Timing (VVT) and individual plug coils mounted on the cylinder-head covers. The pistons themselves have larger diameter floating pins with bronze bushings for higher loads and increased RPM past 7K. Plus the the Gen4 cars got the new TR6060 trans which is the latest version of the Tremec T56 six-speed. With 10% wider gears for higher torque capacity, and a new synchronizer package to boot.

As for stock cars a buddy of mine a few years back ran an 11.71@118 in his bone stock Gen 2 RT/10 at ATCO and "Wanted" ran in the 10.95@130+ in his stock 08 SRT Viper, so with the right driver, the car is plenty able to run with the best and dont forget all the wins that the GTSR cars racked up in the 90's and early 2000's with GT2 and Lemans class races.
As far as performance, those big HP "in-line 6's" better known in car form as Supra's need crazy huge T6-88 and 55-91mm turbo's and 100+ shot of N2o for spooling to get the same power levels a STREET driven Viper from Underground, ART or Heffner produce on a monthly bases.
Back to the issue at hand, DC performance picked up 24 RWHP on a Gen4 Viper just by doing some intake porting and Hennessey with there header and exhaust upgrade Gen4 ran a 10.77@133 in there B/W SRT car... not bad for some bolt on's and stock tune. As for the ACR-X there's still more a private owner can do in the for of porting and tuning to eaisly get another 100+ HP out of the car, I've seen it done alredy with Gen 3 and 4 track prepped cars.

My friends TT GTS in action:
http://www.youtube.com/watch?v=kymg1J_S4Q8&playnext_from=TL&videos=lgRnfkwQsbk

gocartone · Apr 2, 2010

CAM said:
As far as performance, those big HP "in-line 6's" better known in car form as Supra's need crazy huge T6-88 and 55-91mm turbo's and 100+ shot of N2o for spooling to get the same power levels a STREET driven Viper from Underground, ART or Heffner produce on a monthly bases.

SW's Supra runs all boost and up until recently held the title for the mile (~246 mph). Now a Ford GT has that title, I think the Vipers run somewhere in the 220s but I'm not sure. And a lot of Supras run only boost and are street driven. Hell I would take a big turbo Supra over a Viper with the same set up for day to day driving. All that big turbo means is you have to build up boost to make BIG power, but when the turbo isn't spooled you could still drive it easy with more then enough power. Unlike a Viper where the turbo would be spooling so fast it would be more of a handful to drive.

God I hate all this car talk, still got a year of school before I can start making money and get a nice ride.:drive:

Five9Dak · Apr 2, 2010

You fail, you'd rather have a less responsive engine.

gocartone · Apr 2, 2010

Five9Dak said:
You fail, you'd rather have a less responsive engine.

Ok, a built Supra would be making like mid 200hp with out the turbo spooled, that's more then enough to drive around with everyday. Then when you want to go warp speed you have the turbo there waiting for you. How is that a fail? And it isn't just the engine, I would much rather have a mint Supra then a Viper, much easier day to day car from what I've heard about the spartans that Vipers are.

clint282cc · Apr 2, 2010

CAM said:
I saw the thread title and being from the Viper forum side of things thought to chime in and clear up a few things.
First off as others touched on the modern Viper V10 has nothing to do with the spliced 5.9 motor they used back in 89 to make one the first prototype models. Actually as early as the actual Gen1 production cars there were already more differences between the two set ups then one could count such as the 488CID aluminum block, forged crank shaft, 9.1:1 compression ratio 6K redline, 4.00x3.88 bore, coil packs firing at 90 and 54 degree intervals. And the Gen 2 and 3 motors saw even more changes then that.

As some of you know the Gen 4 cars still used the V10 powerplant but was completely revised using Variable Valve Timing (VVT) and individual plug coils mounted on the cylinder-head covers. The pistons themselves have larger diameter floating pins with bronze bushings for higher loads and increased RPM past 7K. Plus the the Gen4 cars got the new TR6060 trans which is the latest version of the Tremec T56 six-speed. With 10% wider gears for higher torque capacity, and a new synchronizer package to boot.

As for stock cars a buddy of mine a few years back ran an 11.71@118 in his bone stock Gen 2 RT/10 at ATCO and "Wanted" ran in the 10.95@130+ in his stock 08 SRT Viper, so with the right driver, the car is plenty able to run with the best and dont forget all the wins that the GTSR cars racked up in the 90's and early 2000's with GT2 and Lemans class races.
As far as performance, those big HP "in-line 6's" better known in car form as Supra's need crazy huge T6-88 and 55-91mm turbo's and 100+ shot of N2o for spooling to get the same power levels a STREET driven Viper from Underground, ART or Heffner produce on a monthly bases.
Back to the issue at hand, DC performance picked up 24 RWHP on a Gen4 Viper just by doing some intake porting and Hennessey with there header and exhaust upgrade Gen4 ran a 10.77@133 in there B/W SRT car... not bad for some bolt on's and stock tune. As for the ACR-X there's still more a private owner can do in the for of porting and tuning to eaisly get another 100+ HP out of the car, I've seen it done alredy with Gen 3 and 4 track prepped cars.

My friends TT GTS in action:
http://www.youtube.com/watch?v=kymg1J_S4Q8&playnext_from=TL&videos=lgRnfkwQsbk

awesome info. thanks for sharing. thats the kinda shit i love to read about. if you want you can keep going lol, ill read a book if its about that stuff ^^ :clap2::clap2::clap2::clap2:

CAM · Apr 3, 2010

gocartone said:
SW's Supra runs all boost and up until recently held the title for the mile (~246 mph). Now a Ford GT has that title, I think the Vipers run somewhere in the 220s but I'm not sure. And a lot of Supras run only boost and are street driven. Hell I would take a big turbo Supra over a Viper with the same set up for day to day driving. All that big turbo means is you have to build up boost to make BIG power, but when the turbo isn't spooled you could still drive it easy with more then enough power. Unlike a Viper where the turbo would be spooling so fast it would be more of a handful to drive.

I'm well aware of SW's race Supra that’s had lots of weight taken out of it and CF body panels added to further help with weight reduction. I'm not saying this to discredit him or anything because he's a phenomenal driver and his team of people put in alot of work into that car to get it where it is. SW is a car guy in general and owns quite a number of different fast rides including an Underground built TT G to boot. Yes just like Vipers, there's "lots of" street driven Supra's but they all take work and continual tuning to keep running especially at hiher HP levels. You make it sound like you build the car once and just because it's a "Supra" it last forever which is far from the truth. If anything it's the TT Vipers that last alot longer at the same and much higher HP levels then the Supra's and other built cars do especially if the work/tuning is higher quality.
As far as daily driven, a friend of mine had a TT Viper RT that put 1000+ to the wheels but drove as easy as stock until you put your foot into it and realized all the crazy power waiting to be unleashed, even still it was pretty easy to handle because the car had a good tune. Supra's become a handful once the lag lets out and boost kicks in. Have you ever seen vid's of big T Supra's going down the track and the drivers trying like mad to keep them inline...there's a reason for that.
The only real advantage a Supra has over a Viper when it comes to racing is the Getrag trans and the inline 6 makes alot less TQ then HP which greatly helps in getting off the line fast to get the 60 foot times low enough to run 8's and 7 with the 6 speed even though a few good Viper drivers have also hit 8's and 7's with the T-56 trans and monster TQ levels of the V10 engine.

ACR viper disapointment...

sick408dakr/t

danbap

gocartone

clint282cc

gocartone

boohoops

clint282cc

boohoops

rtgrouchman

CAM

gocartone

Five9Dak

gocartone

clint282cc

CAM

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