Thanks. So it's less about the engine and more about transmission issues. Those CVTs aren't made for performance.I believe from what I've read on Hondata and Ktuner... they were able to squeeze around 220-230hp from the standard 1.5T engine without damage to the transmission (in CVT models). There's a lot of available info online for Hondata or Ktuner standard tune maps that they tested and perfected so as not to reduce reliability to the car.
Si models (and models with manual transmissions) can handle more torque than the CVTs can. But Hondata and Ktuner also found ways to map the gearing on the CVT so that it builds progressively rather than being instant off the line, this does a lot to save stress to the CVT as that seems to be where most of the issue lies. The CVT is fine once in motion, its the initial launch that causes the most stress, so they found ways to work around it. I don't fully remember what Torque rating they landed on... surprisingly don't think the CVT vs Manual was far off... just different torque spread. I think they managed to get the Si tune close to 300 horses, if I remember correctly.Thanks. So it's less about the engine and more about transmission issues. Those CVTs aren't made for performance.
Is this also true for the Si models?
Baseline | Horsepower Level | Torque Level | Boost Pressure |
187.39 WHP @ 5,550 RPM | 182.97 lb-ft @ 5,550 RPM | 18.55 psi | |
Test 1: Hondata FlashPro Engine Calibration | 197.12 WHP @ 5,400 RPM | 218.51 lb-ft @ 3,000 RPM | 23.20 psi |
Test 2: Mishimoto Performance Air Intake | 205.37 WHP @ 5,200 RPM | 216.58 lb-ft @ 3,000 RPM | 23.66 psi |
Test 3: Injen Front-Mount Intercooler | 209.20 WHP @ 5,250 RPM | 222.95 lb-ft @ 3,200 RPM | 23.78 psi |
Test 4: Custom Hondata FlashPro Tune | 212.65 WHP @ 5,400 RPM | 230.08 lb-ft @ 3,450 RPM | 25.56 psi |
Test 5: 102.5-Octane Fuel Blend |
Welcome to the forum.I have an ‘18 hatch with a Ktuner. With the 21psi tune, the clutch will slip in 5th and 6th when accelerating up from cruising speeds (knowing this I always shift down). I’ve even noticed the clutch will slip in 4th if accelerating hard from a 30 mph speed zone IF I have a passenger. It doesn’t slip if it’s just me in the car. It’s interesting that slippage is sensitive to a 150lb difference.
For passing, if I want to overtake someone who is doing <55 mph in a 55 mph zone, I’ll go to 4th and then drop to 3rd when I make the pass. This gets the rpms up in the 4,500 rpm sweet spot. I absolutely love how it pulls up to redline. Rowing through gears, 100mph comes pretty fast.
Thanks for the welcome. Based on my experience so far, I am happy with my Civic and would consider buying another one in the future. It currently has 50,000 miles on it and hope to add a couple hundred thousand more. Any replacement is years away (hopefully).Welcome to the forum.
Are you getting a new Civic hatch (or sedan) eventually?