Hey guys,
Just ran across this while trolling a different board. If that's legit, I'm ****ed as hell. How can our Maximas dyno around 205 when this thing, with 240 rated hp, dynos in the 220s?

http://www.v6accord.com/forums/showt...8&pagenumber=1

 

Let's see, the car shows only a 10% drivetrain HP loss. And the tech estimated the crank HP at 261. Using 87 octane gas...

RRRRiiiiight. This is the dyno Nissan will want to use for the lawsuit...

 

Hopefully, this is BS. But it will be interesting to see what these new 6 sp Accords dyno for comparison sake. Since Hondas are known for their well-built trannies, let's see what % drivetrain loss they'll experience.

By the way, they're saying over there (AV6.com) that CL-S 6sp dynos at ~220hp. Aren't those rated at 260? So with 5 more rated hp, how come they're dynoing ~15 more hp?

 

I don't know why people get so hung up on HP, torque is what matters and torgue is what the dyno actually measures. HP is calculated from torque (torque * rpm/5,252). HP isn't even physically measured.

HP on this motor is high because the torque curve is very flat through the entire RPM range, which I guess is due to good vtec timing. If you keep good torque up in high RPMs, you'll see from that calculation why HP would be measured high. But the torque on that motor never goes over 200 ft lbs = not very impressive.

HP is a very misleading measure, IMHO. For instance, say your engine hit 250 ft lbs of torque at 3500 RPMS, HP would be calculated to be 166 by a dyno. If you have that same torque @ 5500 RPMs, the HP is calcualted as 261. But at either RPM, given equal torque, the car would have similar acceleration, yet extremely different HP calculations. HP is a measure of work (not force), so you can see why RPM is a factor in the calculation (more turns per unit of time = more work = more HP)

Somone correct me if I'm wrong....

 

this sucks.. I would hate to get spanked by an accord...

 

Umm... 220 on Dyno Dynamics? Stock? Thats about 258 on a Dynojet. Dyno Dynamics reads lower than all other dynos. I know 2k2 wrxs average 162 at the wheels stock on dyno dynamics and 190 to the wheels stock on dynojet.

I am just a little bit hesitant to believe that the 6spd has more fwhp than crank hp on a dynojet. Either the car was modded or the dyno was messed up IMHO. I smoked an auto v6 accord in my 2k pretty hard. Just my .02

 

i would put money on a 2k3 6sp max against a 2k3 6sp AV6.

2k2/2k3's got so much torque, it will just rip the accord off the line. and then it will be up to the accord to catch up

 

I can't stand those new accords. For me they are so ugly.

 

 

ok dyno shmyno....

i drove it, it is not near as fast as a max, handles a bit better but is noticably slower then a 2k2/2k3 max

 

I guess everyone missed that little spike at the end. There's like a 5-10 HP jump at the cutoff. I had a dyno do that once on one of my runs and it said that I had 237 HP and 260 ft/lbs of Torque. Just remember that dynos aren't always about the "peak" HP as much as they are about the curves. And yes, there are accuracy differences between dynos.

He never answered, so we don't know if those numbers are actual numbers or SAE corrected.

It also appears that the numbers are being calculated backwards.

And we all know that you can't really compare numbers if they were not made on the same manufacturer of Dynos. Dyno Dynamics and DynoJet dynos cannot be compared.

 

ITDOOD,
Your logic is right; however going by your thoughts an S2000 should be slow as crap because it only has 160-tq. Hp does play a major factor of acceleration once you hit into the upper rpm.
The old adage, "torque wins races" is only true for those cars that can hook up off the line. FWD cars can't do that very well. If you can launch well (even if you don't have that much power) you will run good times and win races but your mph will be weak. Look at some Mustangs on slicks that run 12.7's @ 104-mph. The reason is they have loads of torque to launch off of, but they have no top end power (read: horsepower) to give them a good trap speed. This generally means those same Mustangs from a rolling race would suck.

This Accord's dyno is an anomaly. You can tell the way all of his peers were shocked at his numbers. None of the rest of them have numbers anywhere near that.

 

To me the only thing that is going to matter is what happends when a m6 Maxima and a m6 Accord line up.

 

The fact that the new A6 Accord has good HP numbers is both good and bad for us.

BAD: Obviosly it won't be as easy for us to win

GOOD: This causes all the automakers competing with the Accord to come out with even stonger engines. from 02-03 the Accord went up 40 HP, so by that standard, the 2005 Max should have 305 HP

 

I believe it. If auto Accords put down the same dyno #'s has auto TL-S/CL-S, why shouldn't the 6speed Accord put down the same #'s as the CL-S 6speed?

 

Cause CL-S 6sp is rated at 260hp, not 240, at the crank.

 

The point I was trying to get to...
Both cars are putting down the same peak HP, although the curve is different. Both cars are making similar HP at the crank, despite to fact that one's rated at 240HP vs. 260HP

 

As long as you know how to drive that won't happen.

So what if the Accord makes more peak hp than the Maxima. It's the average hp that really counts. The Maxima also destroys the Accord in the torque department. I mean, have any of you ever wondered how our 3200 pound cars can run low 14's and only peak 210 hp with an intake? It's the TOTAL power that moves you down the track to get a quick ET. The peak number is only for show.

 

total area under the curve 0wnz

 

Exactly, you '02 and '03 drivers with 6 speeds need to go run some 350Z's and make yourselves proud of your cars. I did. Torque Own3s!!

 

Thanks for the reply!.... I found this website after I posted that goes into detail about the same point you make, it's a good read:

http://www.houseofthud.com/cartech/t...horsepower.htm