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Discussion Starter · #1 ·

Pretty impressive numbers!
 

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Discussion Starter · #3 ·
It maybe accurate. The normal loss through the tranny is about 15 percent for a honda manual. My guess is that the engine is underrated. Even the auto put down 240whp!
 

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Basque Red Fury
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That's a high reading dyno judging by the nismo numbers
TOV dyno'ed 257 manual and others dyno'ed 238-246 automatic. My vote is underrated. The Earth Dreams I4 in the sport is absolutely underrated, nothing this side of a Miata can reach 60mph in 6.6 seconds with "189" hp
 

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The only way to believe this is to dyno a 8th gen and a 9th gen same dyno same conditions. Conditions alone can vary numbers by a good amount.

8th gen was underrated but I believe a 9th gen would dyno 5-10 whp at most 6 speed vs 6 speed v6
 

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Discussion Starter · #7 ·
TOV DYNO NUMBERS

8th gen 6MT - 239WHP
9th gen 6MT - 257whp
TL-S 6MT - 255whp

I am guessing underrated. Especially since we have had a second dyno to confirm the 256whp for a 6MT 9th gen. just my opinion though.

TOV dyno'ed 257 manual and others dyno'ed 238-246 automatic. My vote is underrated. The Earth Dreams I4 in the sport is absolutely underrated, nothing this side of a Miata can reach 60mph in 6.6 seconds with "189" hp
agreed
 

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The only way to believe this is to dyno a 8th gen and a 9th gen same dyno same conditions. Conditions alone can vary numbers by a good amount.

8th gen was underrated but I believe a 9th gen would dyno 5-10 whp at most 6 speed vs 6 speed v6
You got a good point , but same dyno they both are around 20Whp Difference, I doubt weather and humidity can cover up that 20whp . Just my .02 Cents:dunno:
 

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You got a good point , but same dyno they both are around 20Whp Difference, I doubt weather and humidity can cover up that 20whp . Just my .02 Cents:dunno:
Yea but look at the tl-s dyno. How would that put down 20 whp over 8th gen? Perhaps 8th gen conditions put it at a dis advantage?

Not saying this cuz I own a 8th gen. But I've driven the 9th gen and my brother owns a tl type s. No way either of em put down 20 whp over my car
 

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Yea but look at the tl-s dyno. How would that put down 20 whp over 8th gen? Perhaps 8th gen conditions put it at a dis advantage?

Not saying this cuz I own a 8th gen. But I've driven the 9th gen and my brother owns a tl type s. No way either of em put down 20 whp over my car
Well your brothers TL-S if its a 6 speed, will actually have more hp in every aspect (WHP, and Crank HP) , Just because yours seems faster doesnt mean its got more HP, plus the TL-S weighs like 200 pounds heavier.
 

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Well your brothers TL-S if its a 6 speed, will actually have more hp in every aspect (WHP, and Crank HP) , Just because yours seems faster doesnt mean its got more HP, plus the TL-S weighs like 200 pounds heavier.
Not 20 whp... I need to see 1/4 mile times otherwise this means nothing.
 

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144ci of Japanese Muscle!
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Not 20 whp... I need to see 1/4 mile times otherwise this means nothing.
How could the dyno results mean "nothing" but a 1/4mi time would be accurate? It seems to me that there are even MORE variables introduced on a drag strip. Also, wasn't the TL-S rated as having around 15 HP more than the 8th-gen? If so, showing 20hp more on a dyno is within the realm of possibility.

In any case, using a single example of any car as being absolutely representative of all of its type is problematic. Any one of them can be unusually slow or swift when compared to others of its kind. But it does seem as though all the 9th-gen cars are overproducing on the dyno, which doesn't surprise me at all. In underrating the HP on the cars, Honda has precluded the possibility of being sued for overstating the HP that customers will see, as happened with Mazda and the RX-8 (and, IIRC, Ford with the Mustang GT some years back). There's also the possibility that they deliberately understate the HP to help with the cars' insurance rates, which is something manufacturers have been doing since the musclecar era.
 

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How could the dyno results mean "nothing" but a 1/4mi time would be accurate? It seems to me that there are even MORE variables introduced on a drag strip. Also, wasn't the TL-S rated as having around 15 HP more than the 8th-gen? If so, showing 20hp more on a dyno is within the realm of possibility.

In any case, using a single example of any car as being absolutely representative of all of its type is problematic. Any one of them can be unusually slow or swift when compared to others of its kind. But it does seem as though all the 9th-gen cars are overproducing on the dyno, which doesn't surprise me at all. In underrating the HP on the cars, Honda has precluded the possibility of being sued for overstating the HP that customers will see, as happened with Mazda and the RX-8 (and, IIRC, Ford with the Mustang GT some years back). There's also the possibility that they deliberately understate the HP to help with the cars' insurance rates, which is something manufacturers have been doing since the musclecar era.
Yes Totally agree with you that 8th Gen Accord came with less crank hp then the TL-S to start with 270 vs 285, so a 20whp difference is pretty realistic and about the 9th gen Accord, is they are totally underated not just by this Test by TOV, but by other dyno test proving it puts almost 260hp to the wheel. I have never seen dynos proving even 245whp stock on any 8th gen Accord
 

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White on Black AV6-6
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I'm sure Honda dyno tests cars with the A/C on, high-beams, defroster, heater core on, windshield wipers on, radio going - all to simulate a real world alternator drain. And then they take an average including the heat soaked ones and call it good. GOOD business practice which keeps lifelong customers satisfied and committed. Honda has a reputation for having the most powerful engines out competing 100% of all other engines with identical horsepower numbers even some with forced induction. C'mon y'all we know we got a mustang beater with the 6-6 and that's still on the straights. a 250hp car that weighs 3400 pounds is just as fast as a 300hp, 4000 pound challenger.

What's the hp-to-weight ratio on gen 9,8, and 7 six speed v6's?
 

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i've read somewhere that you get an extra 10hp with auto timing if you run the V6 on Premium gaz. I'm doing it, no matter if its true or not :D Shell FTW
 

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i've read somewhere that you get an extra 10hp with auto timing if you run the V6 on Premium gaz. I'm doing it, no matter if its true or not :D Shell FTW
 

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Name is Asaki Yasuaki, owns patent for Honda Knock sensor mounting structure of v-type engine.
I wish our ECU's could tune themselves to adjust the timing with premium fuel (and boot engine preformance), but Honda won't let it. That means no real performance boost from running higher than 87 octane. There are many threads on this in the 9th gen forum.

Save that money and buy an air intake! Somewhat verifiable performance increase and a great noise once you hit 5K RPM.
 
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