Dodge Viper ACR on dyno: More power than advertised
- Thread starter Socrates
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01sapphirebob
Enthusiast
642 H.P.
Thats awesome!!!
Thats awesome!!!SilveRT8
Enthusiast
Great article. We all knew about this but the rest of the world just goes by Manufacturer's published #.
Mine with 1800 miles, pure stock, showed a little better HP but less TQ than this ACR. Will Dyno again in the Spring at 3K+.
Claude
Mine with 1800 miles, pure stock, showed a little better HP but less TQ than this ACR. Will Dyno again in the Spring at 3K+.
Claude
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99 R/T 10
Enthusiast
That was a really stong car. Did anybody notice that one of the member here got a shoutout? Good job helping out FikseGTS
I wonder if the SRT guys 'made some changes' without notifying the EPA officials? With the automakers financial situation and the cost and time required for recertification maybe they just slipped one under the carpet.
Of course I doubt all this but conspiracy’s are always fun!
Greg
Of course I doubt all this but conspiracy’s are always fun!
Greg
mjorgensen Woodhouse
Enthusiast
If you use the 1.1 correction factor that Arrow uses though the number is 600.6. This means the Vette is OVER rated though huh?
Not trying to burst anyones bubble but this is straight from the horses (Arrow's) mouth.
Not trying to burst anyones bubble but this is straight from the horses (Arrow's) mouth.
Newport Viper
Enthusiast
Thanks for the post. Read the comments they are funny!
slaughterj
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What's up with the pansy posts, like this:
"As close to a real race-car as you're going to get for the streets, with all the associated negatives. I love 'em, but this could only *ever* be a weekend/track car. DD'ing a Viper would be painful."
I've DD'd Vipers for the past 7+ years, 100k+ miles, many 10+ hour drives, and they ride just fine.
"As close to a real race-car as you're going to get for the streets, with all the associated negatives. I love 'em, but this could only *ever* be a weekend/track car. DD'ing a Viper would be painful."
I've DD'd Vipers for the past 7+ years, 100k+ miles, many 10+ hour drives, and they ride just fine.
adamlotus
Enthusiast
i have my 08 vert and my neighbors acr dyno at dc and we were both very close at approx 525 t the wheels which brings it close to 600 at the crank
3SXVPR
Enthusiast
Dyno numbers are cool when comparing car to car on the same dyno, but are all over the place when compare a run of a car on one brand dyno versus another car on another dyno. Nice to see both cars done at the same time, same dyno,so at least know what percentage of horsepower and torque the 2 cars are to each other but as far as displayed numbers they should be taken with a very small grain of salt.
SrtBrad
Enthusiast
Here is a more realistic number with a stock 08 ACR that was done by a reputable shop (DC Performance).
First Cali 08 ACR Viper on Dyno and also a 9 sec V
First Cali 08 ACR Viper on Dyno and also a 9 sec V
Saw someone post this about half way down the page, made me chuckle:
A bunch of wealthy guys I worked with had a little bet as to which car I'd like the most. So they each gave me a ride. One was a BMW Z, the other a Porsche 911, and the last a Viper. I rode with them in that order and on the last car I walked back into the office and the guys said, "Oh that it, the Viper won." I said, "How do you know?" They said, Because you look like you just had sex."
A bunch of wealthy guys I worked with had a little bet as to which car I'd like the most. So they each gave me a ride. One was a BMW Z, the other a Porsche 911, and the last a Viper. I rode with them in that order and on the last car I walked back into the office and the guys said, "Oh that it, the Viper won." I said, "How do you know?" They said, Because you look like you just had sex."
cheryl mccally
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I have had 3 Vipers, all DD over 100,000 miles as well. My '08 ACR with the front splitter in and track set up is super. The only problem I have is keeping my foot out of it!
mike & juli
Enthusiast
That's about what we figured our '08 does, roughly 525rwhp. Makes more sense, though we have not dyno'ed the car, don't know if we will have a chance to. ~juli
mjorgensen Woodhouse
Enthusiast
Wow mine makes 620.9rwhp on our Mustang dyno......
mike & juli
Enthusiast
Okay, Mark...why don't you let us know when you REALLY dyno your 2008~~~DUDE!!! ~juli
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mjorgensen Woodhouse
Enthusiast
OH come on that was funny...
I will need to get those 750 miles on her first and I will surely share with you, good or bad.
FikseGTS
Enthusiast
this is my ACR the autoblog post is talking about......
the ZR1 isn't overrated, it has been SAE certified
=======================
The LS9 engine in General Motor's (GM) 2009 Chevrolet Corvette ZR1 holds the distinction of being the 100th engine certified through SAE International's Engine Power Test Code - Engine Power and Torque Certification (J1349). The 2009 Corvette ZR1 engine is certified at 638 hp at 6,500 rpm, with 604 lb-ft torque at 3,800 rpm.
=======================
It appears that the new Viper's are underrated..... unless something from the engine to the wheels is much more efficient on the Viper vs the Vette.... don't they use the same base transmission?
as for comparing different dyno's, from my experience of having the same car on 3 different dynojets, the SAE numbers have been within 5HP from eachother....
the ZR1 isn't overrated, it has been SAE certified
=======================
The LS9 engine in General Motor's (GM) 2009 Chevrolet Corvette ZR1 holds the distinction of being the 100th engine certified through SAE International's Engine Power Test Code - Engine Power and Torque Certification (J1349). The 2009 Corvette ZR1 engine is certified at 638 hp at 6,500 rpm, with 604 lb-ft torque at 3,800 rpm.
=======================
It appears that the new Viper's are underrated..... unless something from the engine to the wheels is much more efficient on the Viper vs the Vette.... don't they use the same base transmission?
as for comparing different dyno's, from my experience of having the same car on 3 different dynojets, the SAE numbers have been within 5HP from eachother....
mike & juli
Enthusiast
OH come on that was funny...
I will need to get those 750 miles on her first and I will surely share with you, good or bad.
Yes, it WAS funny...you sucked me in on that one~!
Looking forward to your results~~! 
~juli3SXVPR
Enthusiast
Interesting, but that is all on Dynojets. Compare those readings with those from a Mustang, Superflow, or some other brands and the results will differ. We see it everday at the shop.
Great results none the less
FikseGTS
Enthusiast
yea, I think they were comparing dynojet's..... here is the ZR1 putting down 529/507 SAE on a dynojet....
2009 Chevrolet Corvette ZR1 Dyno Results Graphs Hosepower - DragTimes.com
anyways, the cars make similar useable power to the ground...
2009 Chevrolet Corvette ZR1 Dyno Results Graphs Hosepower - DragTimes.com
anyways, the cars make similar useable power to the ground...
Interesting, but that is all on Dynojets. Compare those readings with those from a Mustang, Superflow, or some other brands and the results will differ. We see it everday at the shop.
Great results none the less
