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bkozlow 11-15-2012 07:07 AM
Clutch line size
 
What are the pros and cons of using AN-4 as opposed to AN-3 for a clutch line.


Bill K

vector1 11-15-2012 07:46 AM
i think i have used them both, can't tell the difference either way. whatever fittings usually work at the time for me.

Tommy 11-15-2012 09:43 AM
In theory, the larger AN4 line will make it slightly easier to push in the clutch pedal and will allow the clutch disc to engage slightly quicker when releasing the clutch pedal. In actual practice, I doubt that anyone could feel or measure the difference. I'd go with the above advice and use whichever was easier to install.

strictlypersonl 11-15-2012 11:38 AM
When we used -3 lines (back in the early '80s), Car and Driver managed to smoke a clutch because of the slow release. We've used -4 lines ever since.

mickmate 11-15-2012 01:46 PM
That was their excuse Bob ha ha.

Rick Parker 11-15-2012 07:45 PM
In my opinion -3 Works fine. Been using it for 25 years no issues? No need to reinvent the wheel. The only variable is the actual amount of fluid volume being moved back & forth. The same ratios in sizing between Master/Slave fluid transfer to achieve sufficient movement of the clutch arm CAN be obtained with various sizes and still create the same pedal effort.

Dominik 11-16-2012 12:55 AM
I tend to favor -4 but won't stress about it. Make sure your supply line from the external canister to master cylinder is more like ID 5/16" (would that be now -5?)


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