Si's have defective clutch?

CLnet2014 · Dec 18, 2019

They are not defective, they are just to weak to handle more power than stock.
Just drive it until it start to slip, then drop a clutch.
This is kind of the deal when modding our SI's , you'll need a clutch sooner or later. Depending on your driving style.

MuffinMcFluffin · Dec 18, 2019

I'm just curious what it actually takes for the clutch to slip. Eventually I'll eclipse 20 PSI when I want to, but so far I haven't yet and I never start to go hard until after 3.5k RPM at the least (and never really hit past 0 PSI in 5th or 6th gear). I do want a new clutch at some point so I can do those things, though.

By the way, everyone always mentions WOT, but what does that exactly mean? Does that mean when the throttle percentage says 100%? Does that mean when the pedal is all the way to the floor? What qualifies as WOT? I don't know if I've even hit 50% on my throttle before, to be honest.

CLnet2014 · Dec 18, 2019

MuffinMcFluffin said:
I'm just curious what it actually takes for the clutch to slip. Eventually I'll eclipse 20 PSI when I want to, but so far I haven't yet and I never start to go hard until after 3.5k RPM at the least (and never really hit past 0 PSI in 5th or 6th gear). I do want a new clutch at some point so I can do those things, though.

By the way, everyone always mentions WOT, but what does that exactly mean? Does that mean when the throttle percentage says 100%? Does that mean when the pedal is all the way to the floor? What qualifies as WOT? I don't know if I've even hit 50% on my throttle before, to be honest.

The added torque when tuned is pretty insane, this is why stock clutch fails.

More torque = increase potential slip and clutch wearing
WOT = Wide Open Throttle

REBELXSi · Dec 18, 2019

MuffinMcFluffin said:
don't know if I've even hit 50% on my throttle before, to be honest.

You should have gotten the base model with cvt lol

REBELXSi · Dec 18, 2019

Where's the option for "I don't know how to operate a manual transmission"?

MuffinMcFluffin · Dec 18, 2019

CLnet2014 said:
The added torque when tuned is pretty insane, this is why stock clutch fails.

More torque = increase potential slip and clutch wearing
WOT = Wide Open Throttle

I know what WOT means, but people have made claims of going WOT without pressing down all the way on the pedal.

And I’m only hesitant to do certain things because of stories of clutch slippage. I get a robust clutch, I’ll go WOT all day (figuratively speaking). I’d like to last another year on this clutch, though.

CLnet2014 · Dec 18, 2019

MuffinMcFluffin said:
I know what WOT means, but people have made claims of going WOT without pressing down all the way on the pedal.

And I’m only hesitant to do certain things because of stories of clutch slippage. I get a robust clutch, I’ll go WOT all day (figuratively speaking). I’d like to last another year on this clutch, though.

If you are stock, you won't have any problem for the next year i assure you.
That being said, don't go WOT before 3000rpm in gear 3,4,5,6 , as it help preventing clutch wearing.

At the end of the day, it all depend on how you drive the car.
Some people are more aggressive in their driving style than others.

Lagos · Dec 18, 2019

The OE clutch is designed to handle the factory power of the engine, which is about 192 lb-ft of torque. Exedy made a clutch for honda to handle that power, plus a 25% factor of safety.

192 lb-ft x 1.25 = 240 lb-ft

If you keep the car stock, you should never have any issues.
However flashing the car with Ktuner or Hondada will cause it to produce 240 lb-ft or more, hence the slipping issues people are having.

It doesn't really matter what gear or RPM you accelerate in. The stock clutch can handle a car running on the stock tune. If you upgrade the tune, you will need to upgrade the clutch to handle the new power.

MuffinMcFluffin · Dec 18, 2019

I am TSP Stage 1 tuned. As I said, soon enough I want to push it to what I can, but I’m trying to determine slippage and such.

aldo · Dec 18, 2019

When you start up your car in the morning and you let out the clutch and the car isn’t going anywhere, or is barely going, time for a new clutch. Otherwise don’t dump your money.

stevessvt · Feb 19, 2020

I have a 20 Si and it’s about 3000rpm at 75 mph. Roll on it and it’s solid. No slipping. But Honda did change the final drive ratio so maybe that’s helping a bit there. I do feel a very small amount of shutter first thing in the morning once in a while. I just chalk that up to a cold clutch. Otherwise engagement is smooth as can be.

JT Si · Feb 19, 2020

I'm going to add that when I replaced the stock clutch for slipping on TSP stage 1, I noticed the friction disc had no lubricant between it and the input shaft. I also think, after going through the experience breaking in a new clutch and adjusting the pedal, that the pedal/engagement was not adjusted properly from the factory.

Seems to me like these are assembly issues, not necessarily part issues with the design or manufacture of the clutch itself.

I always had a hard time getting it into gear cold, especially if it was below 40 degrees. Now I've been able to shift with zero issue even below 30. The oem clutch not disengaging properly could have led to premature wear allowing it to slip, and also explains all the gold flake I still saw (wearing synchros) on the second time I changed my transmission fluid.

If some cars were assembled/adjusted correctly and others were not, it might explain why some people have no issues with slipping even on aggressive tunes.

Drake · Feb 19, 2020

JT Si said:
I'm going to add that when I replaced the stock clutch for slipping on TSP stage 1, I noticed the friction disc had no lubricant between it and the input shaft. I also think, after going through the experience breaking in a new clutch and adjusting the pedal, that the pedal/engagement was not adjusted properly from the factory.

Seems to me like these are assembly issues, not necessarily part issues with the design or manufacture of the clutch itself.

I always had a hard time getting it into gear cold, especially if it was below 40 degrees. Now I've been able to shift with zero issue even below 30. The oem clutch not disengaging properly could have led to premature wear allowing it to slip, and also explains all the gold flake I still saw (wearing synchros) on the second time I changed my transmission fluid.

If some cars were assembled/adjusted correctly and others were not, it might explain why some people have no issues with slipping even on aggressive tunes.

Did you replace stock clutch with OEM or an aftermarket one?

JT Si · Feb 19, 2020

Drake said:
Did you replace stock clutch with OEM or an aftermarket one?

I installed the ACT organic clutch kit.

Blitted_Master · Feb 19, 2020

I only experienced slipping with the stock clutch when using the TSP Stage 1 tune, Map 3. Otherwise, it never slipped on me.

Si's have defective clutch?

Does your Si have a clutch that slips when its cold (first 5 10 min of driving after car has sat)?

Yes Clutch has slipped

No Clutch slip ever

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