mech to hyd clutch legality Q?
 

ok, wondering if it's ok with nhra to run a hydralic clutch (T.O. bearing) where the was a mechanical linkage....
it sure would make my life easier;)

Re: mech to hyd clutch legality Q?
 

I do not think that is legal. You really need to write to Bachelder or Gracia and get an answer in writing, and keep it with you.

Re: mech to hyd clutch legality Q?
 

I had a hydraulic set up in my car at first. Yes in IHRA. No in NHRA. That was 3 years ago. I run mechanical now.

Re: mech to hyd clutch legality Q?
 

No in NHRA. Same with electro-magnetic clutch release...not even in superstock.

Re: mech to hyd clutch legality Q?
 

If the car / truck originally had a hydraulic clutch system its legal.

Re: mech to hyd clutch legality Q?
 

True, but the original question stated he had a mechanical and wanted to change to hydraulic.

Re: mech to hyd clutch legality Q?
 

What about GT conversions? I took a quick scan of the rule book and nothing jumped out. Does the clutch system go with the car or the engine combination? You know most of these newer model conversions had Hyd clutches & some are only automatic.
Which way does it go?

Re: mech to hyd clutch legality Q?
 

The original poster is building a stocker. But on the GT question, I would ask why would you want a hydraulic system? They seem to pose quite a few problems in releasing the clutch at an acceptable rate, causing problems in engagement (based on what I have read and heard).
Todays clutches offer very little resistance; you can push the pedal in with your fingers if running a competitive unit. Even those units adjusted to a high base pressure are nothing like the old "3400+ pound" pressure plates which made your left leg shake at the stop light!
If space is a concern, GT allows quite a bit of floor / firewall rework. Is there enough room on a small GT car for all the z-bar and other linkage?

Re: mech to hyd clutch legality Q?
 

travis said NO when i asked about the witch doctor, damn thing has a reverse "pull" cable clutch that some GM engineer is still laughing about.

captain jack

Re: mech to hyd clutch legality Q?
 

now that we've decided that hydralic is out, can i modify the mechanical linkage w/ heim joints?