- 315
- raleigh/nc/us
- YungRap
I have a fully modded viper acr but it handles like the bugatti. I need help getting this thing to turn. if anyone has a good setup they could post for me I'd appreciate it. Thanks.
Need Viper SRT10 ACR '08 Tune
- Thread starter jeremy_craig
- 87 comments
- 70,238 views
I've been spending hours figuring this car out too. I fully modded the Viper ACR to the max but it's horrible to drive. There's a suggested suspension setting in another thread for this vehicle but it's pretty horrible. I'm really surprised that this car is getting no love on this forum. It holds one of the top lap times on the Nurburgring in real life, easily beating the ZR1. Too bad it's un-drivable at the moment!
- 103
- Tarmachunter
I myself have come to the conclusion that the Viper will never handle to its full potential because PD have, in their infinite wisdom, decided to remove the ability to adjust the front downforce on this car. Nevermind the fact that it has this ability in real life bone-stock from the factory...
- 135
- ViperMatt
Guys this thing is a beast if you tune it properly. I tuned my ACR to the exact settings as the one that broke the Nur. Ring record. Got them directly from the engineers @ SRT. Can't share the setup but let me tell you it's def. possible and there's a reason the car holds the production record. I just wish I could adjust the aero setup like you can from the factory.
Rotary Junkie
Premium
- 9,810
- Canton, MI
- RJs_RX-7
And they are so secret why exactly?
As it's a production car record, I'd expect it to be repeatable with a car driven directly off the assembly line or the required settings to be public knowledge.
That said, this is a gaming forum. If a setup works, it works. If you don't say they're "exactly" some "top secret" settings directly from "SRT's engineers", nobody would be the wiser...
- 135
- ViperMatt
I'm still playing with it honestly but they gave me two great starting points (rough & smooth track setups). I'm having to try and figure out the what the shock settings on here convert to on the real life KW setup. I'll say the cars like 3/4" front rake and about .12 rear toe. Concentrate most of your efforts @ first getting the rear of the car setup.
^^^ Epic fail.
Anyway, here are my current settings that I really like for the Dodge Viper SRT10 ACR. In my opinion, this is the first set of numbers that makes driving this car somewhat manageable. I'll be playing around with these settings until I discover something better.
Top speed 261
LSD 8/30/20
Height -16/-14
Spring Rate 9.0/14.0
Dampers Ext 4/5
Dampers Comp 4/5
Anti-Roll 5/6
Camber 2.0/1.8
Toe -0.10/0.10
Brakes 5/5
I installed everything imaginable in the tuneup shop except the aero kits.
Rotary Junkie
Premium
- 9,810
- Canton, MI
- RJs_RX-7
Invert the spring rates and then take out a few clicks of front anti-roll there, jj. Should help it turn a bit.
Disagree. In real life you are probably right. But in actual practice inside GT5, having a stiffer front springs worsened the driving dramatically. With that much horsepower and weight thrown to the back, I felt the driving/turning was a lot more stable with stiffer rear springs.
Rotary Junkie
Premium
- 9,810
- Canton, MI
- RJs_RX-7
Not like I know anything about setting a car up in a GT game, but I'd wager that your setup is actually quite understeery at the limit. It may allow earlier application of throttle (and easier saves if the tail does let go) but it will highly likely also drop entry and mid-corner speeds noticeably.
Please try it first and let me know your feedback then. I'd love to improve the tuning but only based on actually trying it out please, not on speculation.
Rotary Junkie
Premium
- 9,810
- Canton, MI
- RJs_RX-7
Since I've presently got no plans to actually pick up a Viper ACR, that's not happening.
If you don't want to listen, I'm not going to yell louder.
If you don't want to listen, I'm not going to yell louder.
It's not that I don't want to listen. I tried your settings and it worsened the driving, as I posted earlier.
Rotary Junkie
Premium
- 9,810
- Canton, MI
- RJs_RX-7
- 135
- ViperMatt
You are correct. The factory rear spring on an ACR is 1085lb/in. It is that stiff due to the downforce (1000lbs+) the rear wing creates @ speed. Front springs are only 514lb/in. I'm still playing with my setup and will prob create a thread when I finally get it done.
BTW, those # converted into the game would be:
F - 9.2 kgf/mm
R - 19.4 kgf/mm
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Rotary Junkie
Premium
- 9,810
- Canton, MI
- RJs_RX-7
No, those are the factory rates for the ACR apparently. They *look* stiff to a GT player but they're really not too extreme. A stock '03 Cobra runs 700lb/in springs all around if memory serves, which is 12.5kg/mm. And they're really not harsh cars.
Although by my math the Viper springs should be 9.2/19.4 when rounded to the closest decimal based on the lbs/in spring rates. But I know how GT limits spring rates.
- 135
- ViperMatt
my bad, your right. I did 1000 instead of 1085. I had 1000 still in my head from the downforce #
- 315
- raleigh/nc/us
- YungRap
Thanks for the bits and pieces of a tune but is there anyone out there with a proven tune for the Viper ACR including everything like LSD and suspension settings, etc.?
There is no proven tune, similarly to how there is no spoon. These are numbers to get anyone here started. You'll have to tweak them slightly based on how you drive. I'm just glad that I'm not the only one who found that stiffer springs in the rear works for the Viper. Not sure why someone above suggested that the setup would be 'understeery', since stiffer springs in the rear tends to reduce understeer/increase oversteer.
Check the numbers above. I think it was -16/-14. You guys have to remember that although Vipermatt may have numbers that translate from stock ACR, you'll still have to modify the numbers a little bit since we added a whole bunch of mods.
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- 123
- RayderRN
I cranked up the rear to 18 and put it at 9.6 in front.......HOLY MOLEY MARY MOTHER OF PEARL!! Thing can actually go tear Laguna up now!!! I just fell love with this car!
- 123
- RayderRN
I was doin 1:18s around laguna seca all day, that may not be amazing but it sure is fun! You do have to slow it down a bit more than most other cars, but when you do you are rewarded with good turn in. This thing is a rocket out of the corners too, so the slowing down is not much of a handicap. I would attribute the problems with this car's under steer to its long wheel base and heftiness compared to other similar modded cars. The springs in the back being 18.0 give this car new life, it bites on launch at full throttle, and you have to try very hard to lose the rear end, it is simply amazing
Thanks for reconfirming the importance of stiffer rear springs on the Dodge Viper.
- 135
- ViperMatt
It has the production car record @ that track as well.
- 10
- m3sterfirewall
The Viper is a God Car if you can figure out how to tune it. Enjoy your Snake and its bite, Hope I can race you in mine some day 
