I've been thinking about this for a long time and yesterday I randomly found a topic in some forum and there was info about some Hyundai models. One of the models was the new sonata turbo. Advertised power as u know is 275hp, but after some dyno tests most of the cars were around 200whp and some around 220whp ?!? Also as u may know this sonata model is slower than most of it's rivals ( with almost the same power to weight ratios ).

Something I really don't like to admit is that the genesis coupe 3.8 ( no GDI ) is a lot slower than the 370z on the 1/4 mile and 0-60 ! Even the old BMW M3 E46 is a lot faster and even with the new engine that is 350hp I don't think that ~40hp more can eat 1 second on 1/4 mile ! I love the genesis coupe , but to all of u that will try to defend it I will give u some info so we can discuss



Genesis Coupe 3.8 V6 curb weight - 1537kg ( 3389lbs ) - 306hp/361nm , 0-60 5,7 ( at best ), 1/4 mile - 14+ ...



BMW M3 E46 3.2 I6 curb weight - 1549kg ( 3415lbs ) - 338hp/365nm , 0-60 ~5sec, 1/4 mile ~ 13.1sec



Nissan 370Z 3.7 V6 curb weight - ??? - 331hp/365nm , 0-60 4,5sec ( WHAAAT ) , 1/4 mile ~ 13.3sec



Don't want to mention that the Mustang GT 3.7 V6 305hp is also faster 1/4 mile 13.7 ...



I'm not hating, I'm HUGE Hyundai fan, but I'm not impressed by their Korean horses !!!



I'll be really happy if some of you share their dyno results. Recently I've been using dynolicious and this app is really accurate !!! My result is 116whp with perfect 2.0 engine and some bolt-ons ( cai,exhaust, 1.8 cam, ppim, pp head) That means that with all these mods I'm like stock engine ( 140hp ) ...



I heard that a lot of Hyundai cars are not even close to their advertised horses so feel free to share your thoughts

 

With advertised HP it is at the crankshaft. For M/T you generally want to subtract 15% for you actual WHP, and for Auto's about 25% for drive train loss. It is the same for the advertised TQ as well.

 

:biggrin:

I know what's whp and bhp, but that's not the case U tell me, what kind of loss is that 275hp=200whp?

 

My 2003 Accent with I/H/E made 100whp, 109lb/ft at the wheels on a Mustang dyno.

Same Accent consistently makes between 98 and 105whp according to the Torque app.

My 2005 Tiburon V6 stock made 161whp, 169lb/ft at the wheels on a Mustang dyno.

Same Tiburon but with Intake and catback made 193whp 206lb/ft at the wheels on a Dyno Dynamics dyno.



Also:



For the Sonata turbo: 220whp x 1.25 = 275hp



Less than about 220whp would indicate it was underperforming.

 

27%. I don't know much about your car but I would say if you are on an A/T that sounds about right. Sorry I don't know peoples knowledge on this forum as I am new to HA, so please don't take it as I am some high and mighty know it all, I just don't know you.



And to your point about a lot of cars not meeting up to their advertised specs, I know what you are talking about. No two Hyundai cars seem to be the same for that matter, bad quality control? Or they just don't care? Also they never tell us what they tested it on, for all we know the OEM's could be testing their cars on Dynapaks which are known to read high.

 

No two cars period are going to be exactly the same. Lots of factors to include adaptive to driving style ecms will cause them to go down the track at different times or turn the dyno with a variable amount of power. (thats without getting into how weather plays with cars output) It gets worse once you add a few miles to the odo. How well each was kept up will have a big impact on how well it runs later in life. If a sticker says you have 140hp and a magazine says you will run a 15.0.. take that as a general guide to what it should do. I had a tad bit of a freak with my LC Accent, the XD elantra was a bit slower than average when it was stock, and I have never went down the strip with the HD. The sonata wasn't quick enough to do anything but commute with it, so not sure on it either.



BTW the RD tibs didn't come with 140hp, they were to old to matter when hyundai was busted for not following the proper procedures for rating hp.

 

Good info , but I'm still confused :biggrin:

WytchDctr, I know that's it's rare two used cars to put the same numburs, but I was talking about new 2.0 turbo sonatas! How can a new model vary that much? I mean come on, 275HP = 200WHP-220WHP ??? I don't agree that the loss for FWD is 25-27%!!! No f*cking way ! Thanx for the info about the RD tibs I was thinking about it , but wasn't sure



187sks, first thanx for sharing the dyno results, but am I missing something...I think the accent numbers are accurate with these mods, but how can a stock tib v6 be 161WHP when it's around 170HP from factory ? Also 32WHP only from intake and catback ?



HellBilly, I also think that there is something that's not right... My car is RD tib 2.0 not the sonata that we are talking about



Don't get me wrong guys I'm not b*tchin' or hatin' I'm just curious



The best formula I know to convert from WHP to BHP is for example my tib: 116WHP - 116 + 10 = 126/0.9 = 140BHP

 

I knew ~15% for drivetrain loss. So multiply bhp with 0.85 to get whp, or multiply whp with (1/0.85=1.17) to get bhp.

I didn't think autos are that much higher, maybe a few percentage points but definitely not up to 25%..



My car (06 GTO, manual, rwd) dynoed at 340whp stock and the advertised is 400bhp. This is exactly 15%



Drag radials, shorter gears, higher altitudes, high ambient temperature, even high humidity will negatively affect the result. Also mustang dynos report lower than dynojets. Finally the gas can make a difference, especially if the computer is smart enough to adjust the timing depending on octane.



I don't buy it that the same model should vary so much, especially new cars. If they do it's just shoddy build quality. If they consistently dyno higher than expected, the manufacturer might be intentionally underrating the engine for various reasons (like they did with the SRT-4).



The way you drive it having an effect on WOT power (especially peak power) sounds like BS to me as well.

 

Dynos measure differently. The Tib mods did not add 32hp. I'm confident in the accuracy of the 161hp stock on the Tib. Got the same number twice on a Mustang dyno a year apart.



25% is pretty close for Hyundai auto loss. At our dyno days a beta II usually puts down about 120whp with a manual but only 105 with an auto.

 

radu_rd2 fully agree with you



187sks, yep dynos measure differently, but that's some huge difference :biggrin: I know that 5-10hp difference from dyno to dyno is normal, but that's huge ! 161WHP stock v6 tib is really cool



I'll make some more runs with the dynolicious and see if I get the same result ~116WHP if so maybe my mods are not as good as I taught