Topic: Spec 3+ (SC403F-2) with a SPEC flywheel

[wparpet]

Hi
i just ordered a Spec 3+ (SC403F-2) with a SPEC flywheel  and wonder if anyone knows the difference in driving characteristics from stock. i have a weird feeling the flywheel would make it less drivable?! 

Really need your input
thanks.

[Kelu]

Shouldn't be way too much different, only in parking lot and when starting from standing still you might stall it.

Most important, bleed it!!

There are 2 other topics around about this.

[hammy221]

Isn't the clutch on our cars a self bleed

[Sol Asylum]

In theory yes, but some have found that not to be the case.

[Dave@DDMworks]

Isn't the clutch on our cars a self bleed

Kinda, on a lot of the cars we do here, you can get the clutch pedal to come back after doing the install by being patient with it and pumping the clutch pedal back and forth slowly. Although that works for a lot of the cars we do here, if we put a vacuum on the reservoir we get there faster and also on some cars we have to use the vacuum to get the pedal to come back. So it really is best to use the vacuum on the car to make sure all of the air is out of the system from the beginning.

Dave

[rlhammon]

Driveability is not an issue, but as Kelu mentioned you'll notice a difference when starting from a stop or at low speeds.  It wasn't an issue for me to get used to, nor do I think for anyone else (or dare I assume for you).  The engagement point is lower to the floor, and the "bite" of the clutch is much greater... after all that is the reason for the upgrade.  If you are used to slipping the clutch from a stop to get a smooth slow acceleration, you'll need to adjust that a bit.

As for the bleeding, I agree with Dave, though I've had to do this twice on my car and did it without the vacuum without issue.  You'll pump the clutch (I did this with my hand, because the clutch pedal doesn't return under this circumstance) and add fluid to the brake reservoir as needed.  If you have two people, great.. if not, check the fluid level, top off, pump the clutch a few times, check fluid level (top off as needed) and repeat until you have a firm pedal feel and the pedal operates as normal.  Don't be discouraged it if takes awhile (I think I spent 10 minutes doing this), and check the fluid level to make sure you're not pushing air instead of fluid and you'll be fine.

[wspohn]

You should get used to the lighter wheel in pretty short order (maybe after stalling it a few times).

I run a 12 lb. flywheel on one of my race cars (not a Kappa).

[Go-N Def]

I have that set up and the biggest thing I've noticed is that second gear bounces a lot at slow speeds unless I'm really careful with it. No problems if I'm getting on it though...

[wparpet]

Hi again
Now i have done the installation, and made some miles on it. 
My fist impression was, "what the hell? this was a extreme clamp pressure?!" The pedal was really hard. But after som miles it settled and got much smoother.
One problem i did notice was vibations in low revs. Under 2000rpm the drivetrain is really living another life.
According to the mekanic, this clutch does not have any dampering with "torque variation springs"(dont know the english word)  which would iron out every explosion to a smoother torque delivery, especially noticeable in low revs.
Is this the case?
Have anyone else noticed this?

This makes me not wanting drive in 5:th gear in about 60 mph. Due to the fact just a little push on the pedal causes big vibrations in drivetrain?!

 

[rlhammon]

Hi again
Now i have done the installation, and made some miles on it. 
My fist impression was, "what the hell? this was a extreme clamp pressure?!" The pedal was really hard. But after som miles it settled and got much smoother.
One problem i did notice was vibations in low revs. Under 2000rpm the drivetrain is really living another life.
According to the mekanic, this clutch does not have any dampering with "torque variation springs"(dont know the english word)  which would iron out every explosion to a smoother torque delivery, especially noticeable in low revs.
Is this the case?
Have anyone else noticed this?

This makes me not wanting drive in 5:th gear in about 60 mph. Due to the fact just a little push on the pedal causes big vibrations in drivetrain?!

 

I haven't noticed any issues  under 2000 RPM.  The only thing I've noticed is that you can't be in 5th gear in as low of a speed as you could previously.  I don't shift into 5th until 60 MPH now, otherwise there is a large amount of drivetrain vibrations.  That's to be expected with this sort of setup though, and that's the only issue I've seen.

I noticed my pedal softened over time, and the engagement point seems to be higher off the floor as most people no longer stall the car... but that could be me and others getting used to it.