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Clutch impressions?

bandit81

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First Name
Angelo
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Columbus, Ohio
Car(s)
2024 Type S, 1981 Trans Am (78 clone)
The ITS clutch is absolutely perfect in my opinion.
  • 1996 Saturn SL - heavier than the 2000 Civic EX, ergonomics ok
  • 2000 Trans Am with 70k+ miles: heavy but not bad, pickup near the top of the pedal, ergonomically perfect
  • 2000 Civic Ex - felt normal (daily driver type quality to it), a lot of pedal movement, engagement was about 1/2 in
  • 2006 Pontiac GTO - pretty similar to the 2000 Trans Am
  • 2007 Civic Si - What I judge against until now - engagement was higher than normal, lighter feel, ergonomics perfect
  • 2019 Civic Si - light, normal engagement, ergonomics good (I expected it to be more like the 2007 Si though)
  • 2023 Integra A-spec: light, normal engagement, ergonomics good
  • 2024 ITS - The car I now judge against

I always assumed performance cars the clutch engagement is higher up the pedal, but perhaps I am wrong about that? Older mechanical clutch cars as the clutch wears the engagement is further up the pedal - I don't think this is the case with hydraulic clutches today, at least not the case with the throw-out bearing I used in my 81 Trans Am (self adjusting spring constantly keeping the throw-out bearing touching the clutch fingers even as they push out from wear). Mechanical clutch completely disengages the throw-out bearing with the pressure plate's fingers.

In rush hour I would want the ITS over any of the others if that says something.

Rev hang - Seems like every car has it now. I do not notice it with the ITS, but I did notice it with the A-spec, and even more so in the 2019 Si.

Throttle-delay - My 81 Trans Am when I got it running was at first using a freshly rebuilt quadrajet carburetor. Absolutely no throttle delay, when you hit the pedal it was instant neck snapping. Fuel Injection has a hint of a delay in comparison - Some may say I am full of it, but I noticed the difference. A carburetor with mechanical linkage does exactly what you tell it when you tell it without having to pass logic through a computer. With that said, I have replaced the carburetor with a FiTech throttle body, fuel injection and computer controlled timing is just so much easier to live with. All these modern cars have a throttle delay but its much better today than it was 10-20 years ago. Rev-hang= mah; Throttle-delay = suck
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slo_its

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GTA, Canada
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2024 ITS
A lot of throttle delay these days is programmed in to make driving comfortable I think. Even my buddy's Evo X had an annoying level of throttle delay which was mostly removed with a tune. This car's comfort mode is probably representative of a very well tuned smooth and gradual increase in power, which I like when I'm tired. Cars from 2000s I've driven had a half second delay which is very annoying. Our Hyundai Tucson is just 3s delay but that's because it can't decide which gear to use in its DCT. Once it gets spast that and beyond 2500rpm, it's decently responsive.

I'd say that Civic Is probably still has some delay. The K20A had a cable throttle and was from the factory meant to be as raw as it gets for early-mid 2000s given it's a Type R. It had almost non-perceivable throttle delay and a light 10.5lb flywheel helped (my mechanic weighed it). It's there, but very minimal.

I'd say the ITS is close to that in sport+ but a bit of turbo lag at the low end. The compression ratio of 9.8:1 versus the K20A's 11.5:1 is probably one of many things contributing to low torque before 2500rpm that I can feel, but is necessary for boost. Once we're past 3000rpm, it feels very close in terms of responsiveness. I can probably get them on par with engine mount upgrade (used to have polyurethane) but I don't know if I want HVI in this car.

I've never had the opportunity to try out old American cars. But hopefully I'll find a chance at some point and it would be a fun comparison.
 
 





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