[DeTomaso] Clutch woes in Asa's garage

[Julian Kift]

Asa Jay,

 

My GT5 has the CNC 3/4" master and when I first got it I spent some time going through similar issues of marginal clutch disengagement. Look at it from a simple hydraulics standpoint; A 3/4" Master with a typical stock 1 1/4" stroke will only throw a 1" bore slave by 15/16" so you are already against the wall as your stock slave has a potential max stroke of 1 5/8". Tpoobtain more slave throw you can increase the flow of the master cylinder (larger bore and/or longer stroke) or decrease the bore of the slave.

 

Adding a 7/8" bore long throw slave will get you back to 1 1/14 throw on the slave but IMO the best ratio is a stock style 1" or 7/8" master (bore that is you can opt for any type of bling unit you like) coupled to a 7/8" bore slave for a 1:1.14 or 1:1 respectively, that is assuming you have the pedal effort reduction kit of the later cars.

 

Julian
 
> Date: Sat, 5 Sep 2009 16:16:35 -0700
> From: asajay at asajay.com
> To: detomaso at realbig.com
> Subject: [DeTomaso] Clutch woes in Asa's garage
> 
> Well, try as I might, I can't seem to get the clutch to totally 
> disengage the trans. I have tried SOBill's method, which appears to be 
> right on the money, but I can't seem to get enough throw.
> 
> Here are my specs:
> - Master is a CNC 3/4" bore
> - Slave appears to be an aftermarket anodized part, with a 1" bore 
> (3.75" exterior length)
> - Solid line at master
> - Braided stainless (Pantera Performance Center) slave line
> - New ATE Brake Fluid
> 
> I just can't seem to get enough throw, but it "used to work." Okay, but 
> also consider this, the pressure plate was toast, the clutch disc pretty 
> well shot and the flywheel was heat checked. Could it be I was being 
> fooled earlier and it didn't really have enough throw previously?
> 
> So, if I put a long-throw slave on it, with the CNC master, will that 
> help me out? I've spent nearly all day trying to adjust this with no 
> luck. We've bled it until I have no bubbles in the line at all. I've 
> gone back twice to bleed it and not got -any- bubbles out of it. I just 
> don't seem to have enough throw.
> 
> I'm looking for some guidance here.
> Thank you,
> Asa Jay
> 
> Asa Jay Laughton, MSgt, USAFR, Retired
> 
> & Shelley Marie
> Spokane, WA
> 
> 1971 Mach I Mustang [ASA JAY]
> 1973 Pantera L 5533 [ASASCAT]
> 
> ****************************** 
> http://www.asajay.com
> http://www.teampanteraracing.com
> 
> 
> 
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