Mk10 Honda civic sport 1.5t vs civic si 1.5t

[TDilover]

Hi all. Over in the US Honda have released an SI model of the civic. Unfortunately in the UK and Europe it doesn't look like we will be lucky enough to get this model.

So what would need to be done to the regular sport to make this the same as the SI?

The SI runs 205bhp or ps (not certain) and 192 lb/ft as opposed the the sports 182 and 177 lb/ft. Is this difference just tuning or do we know if there is more to it like uprated clutch and bigger turbo etc.

I think I have seen that it has bigger brakes and possibly slightly more performance oriented suspension but I can't remember where I saw that. It might have been a YouTube review.

[Haltamer]

There are some fairly sizable differences in them;
https://www.civicx.com/forum/threads/si-vs-non-si....

CivicX said:

engine output increased to 205 HP @ 5,700 RPM (SAE net) and 192 lb-ft torque @ 2,100-5,000 RPM (SAE net)
higher maximum boost pressure (20.3 vs. 16.5 PSI)
lower compression ratio (10.3:1 vs. 10.6:1)
higher-capacity MHI TD025 turbocharger (9-vane vs. 11-vane)
helical limited-slip differential
larger front brake rotors (12.3" vs. 11.1" vented front and 11.1" vs. 10.2" solid rear)
two-mode damper system with normal and firm settings
SPORT mode replaces ECON mode - increases suspension damping, reduces power steering assist, increases throttle sensitivity, and raises the activation threshold of the Vehicle Stability Assist system
235/40R18 91W tires vs. 215/50R17 91H
7% stiffer front spring rate
18% stiffer front upper damper mounts
7% stiffer front stabilizer bar rate
32% stiffer rear spring rate
Solid vs. fluid-filled front and rear compliance bushings (rear shared with the Type R)
High-stiffness rear upper control arms (shared with the Type R)
26% stiffer rear stabilizer bar rate
Si-specific seats with thicker side bolsters, non-adjustable headrests, and stitched "Si" logos
red interior stitching, gauges, and Display Audio color scheme
black headliner and pillar trim vs. gray in EX-T
front and rear facias similar to the hatchback
center-mounted polygonal exhaust outlet
higher-flowing intake system
23% higher-flowing exhaust system
aluminum clutch, brake, and accelerator pedals
carbon fiber-look interior trim
10% shorter shifter throw
leather-wrapped, aluminum shift knob
revised shift linkage
increased rigidity of shifter bracket mount
450-watt audio system (same as EX-T coupe vs. 180-watt in EX-T sedan)
additional items in Driver Information Display including G-force meter, turbo boost gauge with PSI indication, lap timer, throttle percentage, and brake pressure
leather-wrapped steering wheel, shift boot, and shift knob
premium fuel recommended
tire repair kit including sealant and a 12-volt inflator replaces the compact, temporary spare
vanity mirrors are non-illuminated vs. illuminated
EPA fuel economy ratings of 28/38/32 city/highway/combined vs. 31/42/3

If you're looking for a cheap way into an Si, I wonder if you could buy a used one from one of the American airbases - I have seen an Si Coupe in the UK owned by an american serviceman - LHD, Full US Spec - Very interesting to see!

If you're looking for performance, It's possible to remap with a tuning box up to 240Bhp; I'm sure it would be possible to source an LSD too. Wheels, brakes etc. could most probably be obtained from Honda directly.

[TDilover]

Although I have seen the same claim from a tuning box, that seems like one hell of a big jump. Most maps I have seen advertised go to 220 HP or bhp and 221 lbft which seems more realistic.

240 makes me think it will go bang very quickly. I have never used a box and don't see myself using one anytime soon. I suppose it depends on how it connects as to whether it is like putting a generic map on the car. If it connects via odb port then it's virtually a flashed/generic map. The thing is I can get custom maps at around £375 from reputable tuners which I trust more.

The other thing is I don't even own one, just interested to know. I might think about getting one some day. It would be interesting to know how reliable tuned versions are? How long the standard clutch lasts etc. No idea what that is rated at for max lb/ft.