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Kirkham Motorsports

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  #21 (permalink)  
Old 10-06-2020, 07:06 AM
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Cobra Make, Engine: Hurricane 427 Cobra #HM2008, Craft Performance 427w 600hp/600tq, TKO-600 close ratio, original Smiths gauges, lucas switches
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Quote:
Originally Posted by Gaz64 View Post
Bob,

Looking at your pics, if the 2nd is 2-3/8, the 1st is closer to 1-7/8 at best, possibly 1-15/16, which then gives 7/16 to 1/2 inch.

Gary
Gary, Ah good eye - yep, i misread the first pic. its 1-7/8. Would make for total movement of 1/2" :/
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Hurricane HM-2008 build is done!! (for now....)
Craft Perfomance 427W / 600hp / 600tq - TKO600

I love it and I need it I bleed it ~ Yeah it's a wild hurricane ~ Alright, hold tight, I'm a highway star!!
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  #22 (permalink)  
Old 10-06-2020, 11:11 AM
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Default I had clutch problems when I bought my car

My car was an old running car back when I bought it. It had the Tilton 7/8"ID clutch master cylinder. Little or no free travel and just barely enough clutch release. I missed the adjustment and the throw-out bearing seized and killed the clutch fingers. I bought two new Tilton master cylinder kits in 15/16" and 1" IDs. The 15/16" Tilton clutch master cylinder gave more free travel and full release. Then I had a problem that got away from me , turned out the clutch slave cylinder was going bad and no returning to absolute rest That was no problem once I went to the local brake and clutch store. new OEM style slave cylinder off the shelf. I had already changed in the 1' Tilton master cylinder, lots of free travel and lots of clutch release, but the trade off is you gained volume and gave up leverage, I need to wear shoes to operate the clutch pedal. It has been years now since any clutch transmission issues. Now wearing the correct shoes when out driving is the concern.
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  #23 (permalink)  
Old 10-06-2020, 12:29 PM
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Cobra Make, Engine: ERA FIA 2158, ERA 427SC 649 sold
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It sounds like your clutch is fully disengaging. One possibility is that there is friction between the transmission mainshaft and the pilot bearing. Another possibility is the clutch disk cannot move freely on the mainshaft and is staying up against the flywheel. I have seen both conditions in the past.
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  #24 (permalink)  
Old 10-06-2020, 06:45 PM
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Quote:
Originally Posted by bwcobra15 View Post
. . .at rest it shows about 1-3/4", and with the pedal fully depressed it shows 2-3/8" - for a total movement of about 5/8" (0.625"). . .
Bobby
Look at your initial reading again. I am seeing 1-15/16" for a total throw of a little less than 1/2"

That is a little shorter than what you'd like and if you get a little sloppy and don't push the pedal all the way down (Don't ask how I know about this) then the stroke gets to be a touch too little, the disk still spins, the gears grind or shift hard.

Having just a touch more won't hurt anything and will make it a little more user friendly.

I still think your issue is in the stroke of the master cylinder. Bet you're not getting as much throw as you think you are. Back the clevis off a little on the master cylinder pushrod - which will raise the pedal slightly and give it a try.

Say Hi to the Hurricane guys

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Last edited by PaulProe; 10-06-2020 at 06:48 PM..
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  #25 (permalink)  
Old 10-13-2020, 08:38 AM
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Just a quick update ... drove the cobra down to San Marcos October 7th, ran all over the hill country for 4 days, drove back home October 11th - probably over 1,200 miles (havent added it all up yet), no problems whatsoever. The shifter was stiff a few times while stopped but not terrible. I just plunged the clutch pedal deeper.
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Hurricane HM-2008 build is done!! (for now....)
Craft Perfomance 427W / 600hp / 600tq - TKO600

I love it and I need it I bleed it ~ Yeah it's a wild hurricane ~ Alright, hold tight, I'm a highway star!!
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