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Real stock HorsePower of the Facelifted NSX

Joined
23 September 2003
Messages
15
I was wondering if somebody dyno"ed a 2002 or a 2003NSX. All the reviewers do agree that it has over 320HP. For the JDM NSX-R they claim that it carries approx 340HP under the hood. Anyone came up with the real numbers or and top secrets of the car ?


:)
 
Can you post a link to a review that claims the 2002+(or even the type r) has over 290hp? Im very curious to see one, as they are dead wrong.
 
If I am not wrong, somebody dinoed the car recently (I do not find the post) with the CTSC and the results were on line with the one of the '97-'01 cars... so the engine output should be the same.
 
hmmm 340 HP and didn't tell any one or change any part numbers?


bullshit_anim_icon.gif
 
In japanese performance magazine was written: (at the end of the review)

"Perhaps I should smelled a rat when Honda's own
figures claimed a standing quarter mile time more than two seconds quicker than before, while the top speed has been raised a significant amount too. The only conclusion is that the new NSX has a good deal more power than 280 claimed":)
 
With a comptech SC with 2003 NSX dynoed 360. That is right inline with every other 97-01 with a comptech SC.

I don't think there is any more power.
 
For the japanese Skyline R34 which also is claimed to have 280 (official) HP, It was dynoed stock in UK, It was exactly 328HP with premium UK fuel.

Here is a text from an british site:

Looking at the R43 26DETT engine, Nissan's own power graph (in blue) shows torque peaking at 40.0 kgm @ 4,400rpm while delivering 245 PS.
At the peak power of 280 PS, the graph shows 29.5 kgm torque at @ 6,800 rpm.
Now, as PS = torque x rpm / 716, the official power and torque numbers all square up.
But we know this isn't correct, because of a Japanese industry understanding, so I put my standard R34 on Power Engineering's 4WD dyno, which showed peak power (in red) of 328 PS at 6,420 rpm! and peak torque (in yellow) of 39 kgm.
Notice how flat the torque curve is from 3,500 to 5,500 rpm. This all fits the rumours we've heard about peak power.

r34_ps_torque.gif


:) :) :)
 
I have a 2003 and I can tell you this from a very unscientific stand point. It feels faster than the 97 I test drove. There was a very distinct engagement of the Vtec at about 6500 rpm on the 97 that I do not experience on the 2003. The 2003 simply pulls strong all the way to redline. I ran with my friend's 94 tt supra (BPU 19 lbs of boost) and stayed side by side up to about 90. I ran a corvette C-5 from a roll to about 80 and pulled him several car links. Have I dyno the car? No, and I don't know how much other factors affected these runs, but I can say that this car is faster than people generally think.
 
Sure, if you agree to cover any damage that results from the dyno run. Unfortunatley I have had some bad experience with dynos and I'm not to crazy about doing that.
 
gheba_nsx said:
If I am not wrong, somebody dinoed the car recently (I do not find the post) with the CTSC and the results were on line with the one of the '97-'01 cars... so the engine output should be the same.

It's my understanding that you can't compare FI to NA like that.
I know the Type R integra and the GS-r integra have about 20 hp difference NA, but the same output FI (using the Jackson racing SC)

I also have a serious magazine quoting a 320 hp figure. (EVO)
With a nice comment, "rated at 280 ps, these horses seem a lot stronger than other horses."

I believe they do have more. The type r does run a 12.8 1/4 mile, and claims 4.4 0-60. 280 hp riiight.
 
Type R might have a slight power advantage because its engine has been balanced and blueprinted. The regular '02+ NSXs don't have a power advantage. The front of the car is suppose to weigh less. The '02 is also supposed to be more aerodynamic. Maybe this is the difference in performance, but the power output is the same.

In magazines where they have tested the '02+ NSX, the performance numbers aren't far off from the old NA2 NSXs.
 
My car is so fast

RyRy210 said:
Type R might have a slight power advantage because its engine has been balanced and blueprinted. The regular '02+ NSXs don't have a power advantage. The front of the car is suppose to weigh less. The '02 is also supposed to be more aerodynamic. Maybe this is the difference in performance, but the power output is the same.

In magazines where they have tested the '02+ NSX, the performance numbers aren't far off from the old NA2 NSXs.

My 02 is so fast that you can't time it. It probably does 0-60 in ............seconds.

Enough, we all want more power, me, I switched from a C5 and for the 1/4 of a second that I'm slower 0-60, I'll toast a C5 around any road course, and I'm totally stock. I can still get a speeding ticket as fast as any Porsch or Ferrarri. I can turn as many heads as a Lamborghini, or Maserati, and most importantly, when I walk out to a parking lot full of cars, I have the only key that starts my NSX:p :p :p :p :p :p :p :p :p :p :p :p :p :p :p
 
I wonder if there are any japanese owners on this forum? Maybe some of them own an NSX-R so they can told us about it. But as i noticed, dynotesting isnt a very popular hobby in japan.

For 4.4sec 0-60mph, it should have had 330HP approx

Here is an HP quater mile calculator.

http://cosmik.org/calculators.htm

put in the data of the new NSX , 2850lb, 112mph, and 12.8sec time.

It will come out approx 300WHP, which i think is reality :)
 
Twincam said:
Here is an HP quater mile calculator.

You can't go by an equation that only takes into consideration peak horsepower. The entire curve is important. And so is the torque curve. The HP @ 5000 RPM is just as important as the HP @ 7500 RPM.
 
Twincam said:
I wonder if there are any japanese owners on this forum? Maybe some of them own an NSX-R so they can told us about it. But as i noticed, dynotesting isnt a very popular hobby in japan.

For 4.4sec 0-60mph, it should have had 330HP approx

Here is an HP quater mile calculator.

http://cosmik.org/calculators.htm

put in the data of the new NSX , 2850lb, 112mph, and 12.8sec time.

It will come out approx 300WHP, which i think is reality :)

Well, that assumes a 112 mph trap. Using a few other calculators, they suggest a vehicle needs 269 RWHP to reach 12.80 ET. Now Trap is then 106.5 (calculators suggestion, probably on the low side) Plugging that into your calculator reference, yields 277 RWHP, and 268.6 RWHP "used" (whatever that is)
Either way, my 269 RWHP suggest a crank hp of 310 (15% loss)
The other calculator, 277 RWHP suggest a crank of 318.5 (15% loss)
I'd guess 109 trap is correct and that will work out to be 290 RWHP, 333.5 crank hp.

Reference: My own car with my weight is 3124, and I should have 240 RWHP to reach 13.7 (My actual best time) That is 276 hp. (my car is stock) Then again it suggested a 99.5 trap, but it was 103. grrrr. damn calculators.

Conclusion: The NSX-R probably has more than 280/290 claimed, but then again torque curves and other factors matter a lot too. The HP calculators are frustrating, because they never really work out. Maybe they started to quote RWHP in japan just to be inside the gentlemans agreement?
 
RyRy210 said:
Type R might have a slight power advantage because its engine has been balanced and blueprinted. The regular '02+ NSXs don't have a power advantage.

The NSX-R does not have a special treated engine compared to the regular NSX. It is faster simply because it weighs less.

Perhaps you're confused with the Integra R which does have the balanced and blueprinted engine compare to the other Integra variants.
 
Nimbus said:
The NSX-R does not have a special treated engine compared to the regular NSX. It is faster simply because it weighs less.
NSX-R's pistons and connecting rods are balanced and blueprinted (with tighter tolerances than regular NSX):

From http://world.honda.com/NSX/technology/
* Race engine-like balancing of clutch cover, fly wheel, and crank pulley
* Race engine-like balancing and blueprinting of pistons and connecting rods
* Lower final drive gear ratio

From http://world.honda.com/NSX/technology/t5.html
Blueprinting and balancing of the crankcase assembly for engine feel and response that will set your heart pounding

The engine employs the same kind of high precision dynamic balanced clutch cover, fly wheel, and pulley assembly as is used in racing engines. Highly qualified veteran technicians check each assembly with a balancer, pruning away tiny specks of metal with their high precision drill. Rotating weight tolerance is reduced to below 1/10 that of the base NSX, to correspond to the same exacting standards used in racing.

To obtain the maximum effect of this high-precision balancing, weight tolerances of the piston and connecting rod pairs are controlled to within about half that of the base model, just as in the original NSX-R. Crankcase-side and engine block-side main journal diameters are measured, and those having the same bearing metal thickness are combined to increase metal clearance precision and reduce friction. The adoption of these and other time-consuming methods normally unheard of in mass-production imbue the New NSX-R's engine with breathtaking response and feel.
 
Horsepower of NSX-R

We have 2 NSX-R's here in germany.
One of them is the car from the 24h race, before that preparation this NSX-R was used for the sportauto 08/02 supertest.

The car was dynoed with 309 HP at the crank, but the exhaust system (no catalysts), the air intake and the ECU were special
prepared (from Honda Japan) for that test.

The NSX-R standard version has 290-295 HP, surely not more.

The smaller weight ( - 130 kg) makes the biggest difference to the older versions, not the engine.

The top speed is the same like the old car (280km/h)
 
Twincam said:
In japanese performance magazine was written: (at the end of the review)

"Perhaps I should smelled a rat when Honda's own
figures claimed a standing quarter mile time more than two seconds quicker than before, ...

Surely that should read 0.2 seconds. Yes?

I've always suspected that the HP numbers were under-stated so they appear to comply with the voluntary regulations, and that the same thing accounts for the believe that the NSX drive train transmits power to the wheels more efficiently than most cars. I also wouldn't be surprised if the new ones have been tweaked a bit more. I haven't compared part numbers but there is plenty they can do without needing to change those. It would be nice to see one on a proper engine dyno rather than a chassis dyno.
 
Re: Horsepower of NSX-R

Detlef Welsch said:


The top speed is the same like the old car (280km/h)

Shouldn't it be less than the normal NSX since the gearing was set for fast acceleration rather than top speed. If I'm not mistaken NSX-R top speed is about 170mph and the normal manual one is 175mph(slower acceleration).:D
 
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