swexlin
Viper Owner
I believe driveline losses in these cars are only about 12% or so. No torque converter to eat up power like in a car with an automatic.
same old crappy sounding v10 (
They have to leave room for the next few years.
They can't do anything more with the interior really, so the HP will have to bump up what else would entice someone in the coming years.
More HP with a vert and ACR option coming.
I'm kinda underwhelmed with the 640 number myself, but do like the interior and think it looks to be what was needed to make the new car appeal to a broader spectrum of buyers. It's got the nannies so people that come over from Ferrari's have a fighting chance to drive them more then 200 miles without wrapping it around a tree. Although it's usually the torque that (Snake)bites the sweater vest crowd and nannies won't save everyone.
That being said, I am only really interested in an ACR version. If the ACR looks like the new GTSR and has 700 hp...I will buy one.
So does that put me in the hater crowd?
I think it will be no problem to get this engine to 700hp and pass emissions in all states. I cannot wait to get one!
I think it will be no problem to get this engine to 700hp and pass emissions in all states. I cannot wait to get one!
345's, here are a few things I figured out: I think people should buy or acquire the new transmission ratios and get the 3.55's:
SRT just used custom gear ratios that are roughly the same when you multiply the transmission gear ratio by the rear end gear for the first 3 gears and of course changed 5th and 6th...
So, in absolute terms taking into account transmission gear ratio X rear end gear ratio, now the Gen V has 2% more TQ multiplication in 1st gear and second gears(easy to spin the tires in those gears anyway while still being able to go 0-60 in 1st gear), about 5.5% more TQ multiplication in 3rd, 13.5% more tq multiplication in 4th, 17% more in 5th up to 190 MPH and only 2% less than the .74 5th with the 3.07 old style transmission/rear end gear ratio setup!
So: when you take into account that in the power band where the Gen V is making the +40 LBS/Ft, then the torque multiplication by gear is the following:
Gen4:...............................................................................Gen V:
1st 560 RWTQ * 2.66* 3.07 = 4573.................................1st 1st 600 RWTQ * 2.26 * 3.55 = 4814 4814/4573 = 5% More TQ multiplication
2nd By similar calculation = 3060.......................................2nd By similar calculation = 3365 3365/3060 = 10% More TQ multiplication
3rd = 2235 ......................................................................3rd = 2535 2535/2235 = 13% More TQ multiplication
4th = 1719.......................................................................4th = 2130 2130/1719 = 24% More TQ multiplication
5th = 1272.......................................................................5th = 1640 1640/1272 =29% More TQ multiplication
6th = 860.........................................................................6th = 1342 ==> Forget about this comparison.... but 1342/1272 is still 5.5% more TQ multiplication than stock 5th when the MPH of the Gen 4 and Gen 5 in this side by side race to top speed would necessitate the Gen 5 having to shift into 5th gear at about 190 MPH....
So when people are upset about only 40 more HP, they are not taking into account the gearing, as the Gen 5 has about 5% more power you will feel in 1st, 10% more in 2nd, 13% more in 3rd when aero drag starts to become a factor, 24% more in 4th, and 29% more in 5th until 190 MPH. In loose terms since the torque curves of the gen 4 and 5 are fairly similar except for the Gen 5's staying flat to the very end as depictrd in the graphs shown to us, we can reason to multiply the HP by these numbers to illustrate to the people upset by the absolute power numbers that 1st gear has 640 X 1.05 = 672 HP, 2nd gear has 640 X 1.1 = 704HP, 3rd gear 640 X 1.13 = 723.2 HP, 4th gear 640 X 1.24 = 794 HP. 5th gear (up to 190 MPH) 640 X 1.29 = 826 HP.
So with this gearing, the Gen5 will accelerate like iit has this much more power in each gear as compared to the Gen 4.....
What I am saying is that the Gen 5 will eat the Gen 4 alive in a mile race or a race to the top speed. All this because of gearing......
Interesting?
YES!
He's demonstrating the effective torque multiplication of the gearing. You know... the reason a car accelerates more quickly in lower gears.I cant believe it!
What kind of assumptions are those?
5th Gear and 826HP?? Are you serious?
I cant believe it!
What kind of assumptions are those?
5th Gear and 826HP?? Are you serious?
.
But what's the benefit of underrating HP when it comes to selling a car?
You think in reality they have 675 HP but the chose to advertise it as 640?
Kinda counter productive no?
Am I wrong in thinking that this looks like a warmed over Gen IV engine? Forged internals aside, where did they get the extra HP? Just a more aggressive tune to get more out of the cam? Different intake manifold? Different heads?
I'd be curious to see all the specs of the powerplant.
Dan, I haven't read whether the new PCM is programmable...what have you heard?I think it will be no problem to get this engine to 700hp and pass emissions in all states. I cannot wait to get one!
I'll never forget that whole debacle with the '99 Cobra. I owned a '97 Cobra at the time and followed it closely. Problem with those cars is that they were way overrated. The engine was supposed to make 320 crank horse and they were dynoing in the 230-240s.publically under rating an engine wont get you a law suit like for had w the Cobra Mustangs years ago, when all the cars were found to be under the "claimed" hp
These are the ratios:
1st 2.26
2nd 1.58
3rd 1.19
4th 1.00
5th 0.77
6th 0.63
Axle Ratio 3.55
Overall Top-gear 2.24
All current specs can be seen here...
http://www.drivesrt.com/assets/reveal/docs/2013-srt-viper-spec-sheet.pdf
Sorry if this is a simple question/answer, but why not just deliver the Gen V with upgraded bolt-ons, take it to 675HP? On a 100K car what would better flowing headers, cats, exhaust add to the final price, 4-5K? Seems like good $ to HP figure, and accomplishes a final number that would please most owners. I thought the aftermarket upgrade to my Gen IV was worth every penny.
Because not in a MILLION YEARS would it pass emissions and driveability tests. They also could have put a dry sump in there but THATS EXPENSIVE TO DEVELOPSorry if this is a simple question/answer, but why not just deliver the Gen V with upgraded bolt-ons, take it to 675HP? On a 100K car what would better flowing headers, cats, exhaust add to the final price, 4-5K? Seems like good $ to HP figure, and accomplishes a final number that would please most owners. I thought the aftermarket upgrade to my Gen IV was worth every penny.