Check clutch fork adjustment

[lk82]

Can you guy confirm what I think?
I'm thinking my clutch fork and pivot ball are bad.
Pic is with clutch engaged and clutch pedal alway out

 

[pauleyman]

Pedal does not affect fork position. The fork looks to be too far to passenger side.

 

[lk82]

Ok so that would be why I feel like I'm not getting any power and it smells a little like burnt clutch and the car stalls from time to time

 

[pauleyman]

It smells like burnt clutch either because clutch is worn or its not fully engaged. Can you push the slave in? If not you must fix it.

 

[lk82]

I can push the slave in by hand. I just replaced the master and adjusted according to the jacks video.
The guy I bought the car from said he replaced the clutch with a fondiza clutch and lightweight flywheel about a year ago.
The car has sat for the last 8months with a bad crank angle sensor

 

[lk82]

Could it be possible dragging tob

 

[pauleyman]

My bet is step height is wrong.

 

[lk82]

So I should pull the trans and shim the pivot ball.

What issues can that cause if the step height is wrong?

 

[luv2rallye]

If the step height is wrong you'll have to shim the pivot ball to correct for it. The fork center should be just right (driver's side) of the bell housing window center when engaged (pedal up): http://www.roadraceengineering.com/eclipsetech/clutch/armcentered.jpg.

Here's my rule of thumb on fork position: http://www.dsmtuners.com/threads/thoughts-on-if-i-should-shim-or-not.485218/#post-153464000.

Problems when on passenger side of center like yours is: http://www.dsmtuners.com/threads/extended-slave-cylinder-rod-question.443848/#post-153059797

 

[pauleyman]

From your description you need a new clutch. Correct any other issues at thst time.

 

[TSi-Rocket]

I didn't think a fidenza flywheel can be stepped it has a replacement friction surface I don't think you grind where the pressure plate mounts on a fidenza aluminum FW?

Aftermarket slave and master can cause problems.
http://www.dsmtuners.com/threads/oem-vs-aftermarket-clutch-master-and-slave-cylinder.406950/

I argued with my Pop's about the fork and ball replacement, we used micrometers to measure 3 forks and 3 used balls and all measured within a couple thousandths even against a new ball and fork.

**I still ended up adding a shim to the pivot ball and we determined it was due to a variation in the design of the pressure plate and because the flywheel(stock) had been ground a few times changing the angle.

 

[pauleyman]

You have to surface any flywheel and get the right step for whatever clutch you are using. Regardless of method, brand etc step height must be right or youre wasting your time. Clutch will not operate properly outside of a specific range.

 

[TSi-Rocket]

I understand the purpose of the correct step and I get what your saying paul like running the fidanza fw with an act can require a different step. ik82 reported its a fidanza fw with fidanza clutch. Given its a new fidanza fw that was stepped correct at the factory and it has a new fidanza clutch it should work. I cant see fidanza selling a matched clutch/fw setup with the wrong step. But we don't know if the car actually has a matched set until its taken apart.

 

[pauleyman]

I understand the purpose of the correct step and I get what your saying paul like running the fidanza fw with an act can require a different step. ik82 reported its a fidanza fw with fidanza clutch. Given its a new fidanza fw that was stepped correct at the factory and it has a new fidanza clutch it should work. I cant see fidanza selling a matched clutch/fw setup with the wrong step. But we don't know if the car actually has a matched set until its taken apart.

Stepped correct at the factory. Thats an assumption. I've seen many many people buy a new flywheel and just install it right out of the box. Bad plan. Always verify the step including those fresh from the machine shop that was just provided specs. One last thing, calipers are not the proper tool.

 

[TSi-Rocket]

I check with a straight edge and calipers across the flywheel at a bunch of points and at different angles. Ive had problems with local machine shops so I verify the friction surface is square. Then you can use dial indicators as TRE/RRE describe. Unfortunately most ppl don't have access to the equipment to check as TRE says and your left at the mercy of the machine shop.

http://www.teamrip.com/flywheel_step_height_info.html

 

[pauleyman]

Any machine shop worth anything will show you a depth mic and be happy to verify for you in front of you. I will refuse the work if they wont. Of course shops willing to do that also get it dead nuts every time.

 

[TSi-Rocket]

It took me a few times to get one of the machine shops to get it right even after I gave them the step height I desired. I also found out they cant cut valves right either, I bought neway cutters and starting cutting the valves myself. The next flywheel will go to a better shop and I will pay the extra to get it right the first time. I found you get what you pay for. Paul now that you said something I did use a depth mic my dad lent me.

 

[GST with PSI]

JAM stepped my last flywheel. They mic'd it right in front of me, at my request. The pictures speak for themselves:

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