yo yo...This has been discussed a few times, but actually we get 274 HP on 87 octane. They have a non-DI engine. Looks very similar output numbers and also a 2.0T but its NOT the same engine/fuel system. With DI we get 274 HP on 87, with 93 octane engineers state to expect ~ 10-15 more HP ontop of the 274.

 

So you're saying if we fill up with 93 octane, we can expect 285-290hp from the turbo Optima?

 

Genesis engine is GDI as well

 

3.8 v6 is.... 2.0t is not... so they have the tuning market easier.

 

Aren't the 2013 coupes both direct injection? I know the 2.0 one is hence the hp spike up around what we are running compared to the old versions running low 200hp.

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hmm, looks like you're right.

 

They are starting to confuse people like Ford has done all along with their specs.

 

i'm glad we get 274 hp on 87...cheaper for us!!! i'm in California and i hate my gas prices....

 

You would only get more power if the car adapted the ignition timing to take advantage of the higher octane. I doubt this would happen. If a car company can advertise more HP they usually will, why wouldn`t they advertise 289 if it could make it?

It would be very simple to test if any turbo owner has an ultra gauge or scan gauge they can see the ignition timing as they drive, do a fast acceleration run and note the intake air temperature and the TPS position. Then when the tank is almost empty fill it with high octane and get the intake air temp to around the same and do the same run at the same TPS then note the new ignition advance.

We recently had a heat wave here, 40celcius plus, I was seeing 60+intake air temp so I put 91 octane in, I didn't notice a difference in ignition, the retard is probably triggered by the intake air temp and not the knock sensor, since I have a 2.4 I can't help with the original question other than advice.

 

I've been running premium for my last 2 out of 4 fill ups now. Definitely don't notice any increase in performance. My MPG isn't that great though, so maybe there is some extra increase, although that could just be because I drive like a dick.

 

although that could just be because I drive like a dick.

:lmao:

i thought i saw a increase in mpg when i ran premium also. but i think it might just be beacause my engine broke in more

 

source to end the debate > Dyno-Tested: 2011 Hyundai Sonata 2.0T

While Hyundai rates the engine's 274 horsepower and 269 lb-ft of torque (as measured at the flywheel) on 87 octane, the company's powertrain engineers tell us that 93 octane allows for the production of about ten additional horsepower and no change in peak torque. Our car had 91 octane in the tank, so interpolating suggests that our car has about 6-8 horsepower more than its rating, or a total of 280-282 hp the flywheel.

timing is adjusted by the ECU.

pwice,
the increase from 210 to 260 HP (274 on 93 oct) for the Gen Coupes was mainly a change in turbos. The went from a td04l-13t turbo to a td04hl-19t turbo (like ours). Plus new IC to go with it, etc.. But its not DI so its tuning friendly.

 

source to end the debate > Dyno-Tested: 2011 Hyundai Sonata 2.0T



timing is adjusted by the ECU.

pwice,
the increase from 210 to 260 HP (274 on 93 oct) for the Gen Coupes was mainly a change in turbos. The went from a td04l-13t turbo to a td04hl-19t turbo (like ours). Plus new IC to go with it, etc.. But its not DI so its tuning friendly.

Its not really the DI that's not tuner friendly. It's the ECU.

And personally, I still don't believe that our cars make 274 on 87. I just don't....