[drushmere]

Does anyone have any links to some in-depth engine information?

 

[kseriesparts]

"2016 civic engine breakdown"

If you google this, you will find other sites showing some good info.

I do not want to copy and past from other forums

Motor Trend has a fun article about how the 1.5T is under powered.
http://www.motortrend.com/news/2016-honda-civic-1-5t-dyno-suggests-underrated-horsepower-torque/

 

[dick w]

Not sure what kind of information you seek.

Here are some places to start:

http://hondanews.com/channels/civic-press-kit/releases/2017-honda-civic-hatchback-press-kit-powertrain
http://hondanews.com/channels/civic-press-kit/releases/2016-honda-civic-coupe-press-kit-powertrain
http://hondanews.com/channels/civic-press-kit/releases/2016-honda-civic-sedan-press-kit-powertrain

 

[drushmere]

Thanks for the replies - certainly some good information here.

It's strange that they are only touting a 4hp increase with the jump to premium fuel - it almost begs the question of "what's the point?"

 

[dick w]

It's strange that they are only touting a 4hp increase with the jump to premium fuel - it almost begs the question of "what's the point?"

I think that is the point. A lot of Internet Experts want the car to produce 20% more output or something from the switch to premium because, well, it just has to be. Honda says otherwise.

 

[B20Vtec]

Precisely that ^

These interweb engineers and master tuners will try to tell you that switching to premium fuel will gain you a ton of horsepower, throttle response, drastically better mpg, etc. It's magic fluid.

 

[Polak]

Has anyone tested how much the stock CVT trans can handle?

 

[fear24]

handle? as far as what?

 

[CivicDuty]

If the ECU is calibrated for 87 octane, that's what it wants. If the ECU is reflashed/calibrated for 91 octane, that's what should be used.

 

[drushmere]

I guess I just don't understand why they would make it for 91 octane. Either Honda's numbers are conservative or they thought that an extra 4hp would make people okay with buying 91. Either way, seems pretty stupid to me. That being said, I'm still going to buy it....I'm just annoyed..lol

 

[dick w]

You are going to buy the car or buy the 91 octane to run it on?

The point is that Honda aims the Civic at buyers who view a Honda recommendation to run on 87 as a good thing and view a Honda requirement to run 91 as a bad thing. So they tuned it for 87 and not for 91. If Honda wanted to max performance and tune it to require 91, they surely could have done so, and have done so on other cars they produce. They wanted the spec sheet for their economy car to say "Required fuel: Regular unleaded" not "Required fuel: Premium unleaded."

A 91 requirement on the Type R, or even the Si, and a corresponding performance increase, won't surprise me a bit. On the Type R I'd even expect it. So far in this thread my assumption has been we are talking about the Sedan, Coupe, or Hatchback variants available today.

If you want to run it on 91, knock yourself out but just don't expect to be able to detect any difference except in your wallet. I'm sure the gas companies will be glad to sell it to you.

 

[drushmere]

We've fallen off the rails somewhere here...

My comments in this thread relate most specifically to the 2017 Honda Civic Hatchback Sport Touring model which, according to Honda, REQUIRES premium fuel. My point is that I don't understand why they would make the Sport models a premium fuel car when all it does is stretch out another 6 hp from what I would assume is the exact same engine as the lesser trims?

What am I missing here and sorry if I've confused this.

 

[dick w]

OK now we are on the same page. I hadn't noticed the subforum for context.

Same engine, different ECU programming? Maybe different cam timing? (Look at the torque increase they feed the 6MT!) Tough to say. Without dyno data for the different variants of the engine, only Honda can know.

 

[fear24]

We've fallen off the rails somewhere here...

My comments in this thread relate most specifically to the 2017 Honda Civic Hatchback Sport Touring model which, according to Honda, REQUIRES premium fuel.

What am I missing here and sorry if I've confused this.

i read it as RECOMMENDED FUEL. just sayin

 

[drushmere]

Haha - could indeed be the wording but I'm too lazy to go and look now.

Either way, even if it's only recommended, I still don't see the point....grrrr

 

[Smith]

From what I researched, it's that overall you can run the lowest octane fuel without problem, the only downside is the loss of power. But do you own research before you go that route, don't blame me if something breaks.

 

[4Tires]

Where did they say premium fuel? I thought Honda was aiming for the average driver so their engines are tuned for regular octane levels.
If that's true, it's probably best to just follow the recommended fuel.

 

[B20Vtec]

Just go with the recommended. Whatever your book reads, go with it lol.

 

[dick w]

Where did they say premium fuel?

In the Hatchback powertrain press release:

Recommended fuel (LX 6MT) Regular unleaded (87 octane) (LX CVT) Regular unleaded (87 octane) (Sport 6MT) Premium unleaded (91 octane) (Sport CVT) Premium unleaded (91 octane) (EX CVT) Regular unleaded (87 octane) (EX-L Navi CVT) Regular unleaded (87 octane) (Sport Touring CVT) Premium unleaded (91 octane)

 

[Daddioinnc]

Does anyone have any links to some in-depth engine information?

1.5L Turbo Engine Specs:

• 174 horsepower @ 5500 rpm
• 162 lb-ft @ 1800-5500 rpm
• Single-scroll turbocharger
• 16.5 psi boost
• 31 city mpg, 42 highway mpg, 35 combined mpg
• Direct injection
• DOHC (dual overhead cam) driven by timing chain
• Dual VTC (variable valve timing control)
• Cylinder head with the built-in water-cooled exhaust manifold
• Aluminum block and cylinder heads
• Exhaust-port passages cast directly into cylinder head (eliminating separate exhaust manifold)
• Drive-by-wire throttle
• Cavity-shaped pistons and optimized skirt design minimize vibration and increase operating efficiency
• Lightweight steel connecting rods are heat-forged in one piece for higher strength
• New grinding process known as plateau honing further lowers friction level between pistons and cylinders
• 0W-20 oil
• Regular (US-grade) unleaded 87 gasoline
• Mechanical high-pressure fuel pump
• Sodium-cooled exhaust valves
• Differences from 2.0L engine:
  • Mono scroll turbo system with electric wastegate and intercooler allows for turbo boost to be built up with relatively small throttle openings and low rpm.
  • Compression ratio of 10.6:1.
  • Smaller M12 spark plugs
• 0-60:
  • C&D achieved 6.8 sec
  • Motor Trend achieved 7.2 sec w/ touring model
  • [Official spec not yet released]
• 1/4 mile:
  • C&D achieved 15.3 sec @ 94 MPH w/ touring model
  • Motor Trend achieved 15.5 sec @ 92.4 MPH w/ touring model

2.0L Engine Specs:

• 158 horsepower @ 6500 rpm
• 138 lb-ft torque @ 4200 rpm
• With 31 city mpg, 41 highway mpg, 35 combined mpg
• Multi-Point Port injection
• DOHC (dual overhead cam) driven by timing chain
• Dual VTC (variable valve timing control)
• Cylinder head with the built-in water-cooled exhaust manifold
• Aluminum block and cylinder heads
• Exhaust-port passages cast directly into cylinder head (eliminating separate exhaust manifold)
• Drive-by-wire throttle
• Cavity-shaped pistons and optimized skirt design minimize vibration and increase operating efficiency
• Lightweight steel connecting rods are heat-forged in one piece for higher strength
• New grinding process known as plateau honing further lowers friction level between pistons and cylinders
• 0W-20 oil
• Regular (US-grade) unleaded 87 gasoline
• Differences from 1.5L turbo engine:
  • i-VTEC (intelligent Variable Valve Timing and Lift Electronic Control) aids the VTC
  • Port injection with Programmed Fuel Injection (PGM-FI) system to handle fuel delivery
  • Compression ratio of 10.8:1
• 0-60: [official spec not yet released